/* ========================================
   動くWebデザインアイディア帳 — 章別デモスタイル
   Ch.4〜Ch.9
   ======================================== */

/* ----- 章見出し ----- */
.chapter-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin: 3rem 0 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--accent);
  scroll-margin-top: calc(var(--header-h, 72px) + 1rem);
}

.chapter-heading h2 {
  font-size: 1.5rem;
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
  color: var(--text);
}

.chapter-heading .chapter-jumps {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: right;
  margin: 0;
  flex: 0 1 auto;
}

.chapter-jump {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

.chapter-jump:hover {
  color: var(--accent-hover, var(--accent));
  text-decoration: underline;
}

.chapter-jump-sep {
  color: var(--text-muted);
  pointer-events: none;
}

.book-ref {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--note-bg);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

/* ----- Ch.4 ローディング ----- */
.loading-grid,
.loading-grid-extended {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.85rem;
}

.loading-box {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 0.55rem;
  align-items: center;
  text-align: center;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.loading-box-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 108px;
  overflow: hidden;
}

.loading-thumb-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  width: min(100%, 180px);
}

.loading-box-thumb .spinner-ring {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
}

.loading-box-thumb .loading-bar-wrap,
.loading-box-thumb .loading-bar-progress-wrap,
.loading-thumb-stack .loading-bar-progress-wrap {
  width: 100%;
}

.loading-box p {
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.4;
  align-self: start;
  width: 100%;
}

.loading-box .loading-try-btn {
  width: 100%;
  margin-top: 0;
  justify-content: center;
}

.loading-count-preview {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.loading-count-preview.is-sm {
  font-size: 1.125rem;
}

.loading-bar-progress-wrap {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.loading-bar-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 999px;
  transition: width 0.08s linear;
}

.loading-logo-preview {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
  line-height: 1;
}

.loading-logo-outline {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--accent);
  paint-order: stroke fill;
  letter-spacing: 0.06em;
  animation: loadingOutlineThumb 2.2s ease-in-out infinite;
}

.loading-logo-hand {
  font-family: 'Caveat', cursive;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
  animation: loadingHandThumb 2.4s ease-in-out infinite;
}

.loading-logo-pulse {
  animation: loadingLogoPulse 1.4s ease-in-out infinite;
}

@keyframes loadingOutlineThumb {
  0%, 100% { opacity: 0.45; clip-path: inset(0 18% 0 0); }
  50% { opacity: 1; clip-path: inset(0 0 0 0); }
}

@keyframes loadingHandThumb {
  0%, 100% { opacity: 0.4; clip-path: inset(0 100% 0 0); }
  55% { opacity: 1; clip-path: inset(0 0 0 0); }
}

@keyframes loadingLogoPulse {
  0%, 100% { opacity: 0.35; transform: scale(0.94); }
  50% { opacity: 1; transform: scale(1); }
}

.spinner-ring {
  width: 40px;
  height: 40px;
  margin: 0 auto;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
}

.loading-dots span {
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  animation: dotBounce 1.2s ease-in-out infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.15s; }
.loading-dots span:nth-child(3) { animation-delay: 0.3s; }

@keyframes dotBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
  40% { transform: scale(1); opacity: 1; }
}

.loading-bar-wrap {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.loading-bar {
  height: 100%;
  width: 30%;
  background: var(--accent);
  border-radius: 999px;
  animation: loadBar 1.5s ease-in-out infinite;
}

@keyframes loadBar {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

.loading-demo-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  overflow: hidden;
}

.loading-demo-overlay.open {
  opacity: 1;
  visibility: visible;
}

.loading-demo-overlay.is-opening {
  pointer-events: none;
}

.loading-overlay-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  z-index: 2;
  width: min(320px, 88vw);
}


/* 全画面オーバーレイ共通：閉じる（右上 ×） */
.fs-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 10001;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--text);
  font-size: 1.5rem;
  font-family: inherit;
  cursor: pointer;
  line-height: 1;
  padding: 0;
  display: grid;
  place-items: center;
}

.loading-overlay-msg {
  position: relative;
  z-index: 4;
  max-width: 320px;
  text-align: center;
  font-size: 0.9375rem;
  color: var(--text);
  line-height: 1.6;
  padding: 0 1rem;
}

.loading-full-count {
  font-size: clamp(3rem, 12vw, 5rem);
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.loading-full-count-suffix {
  font-size: 0.45em;
  opacity: 0.85;
}

.loading-full-bar-wrap {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.loading-full-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 999px;
  transition: width 0.06s linear;
}

.loading-full-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.loading-full-logo {
  font-size: clamp(2rem, 8vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text);
}

.loading-full-logo.is-pulse {
  animation: loadingLogoPulse 1.2s ease-in-out infinite;
}

.loading-full-logo.loading-logo-outline {
  color: transparent;
  -webkit-text-stroke: 2.5px var(--accent);
  paint-order: stroke fill;
}

.loading-full-logo.loading-logo-outline--draw {
  animation: loadingOutlineDrawOnce 2s ease forwards;
}

.loading-full-logo.loading-logo-hand {
  font-family: 'Caveat', cursive;
  font-weight: 700;
  font-size: clamp(2.25rem, 9vw, 3.25rem);
  color: var(--accent);
  letter-spacing: 0.02em;
}

.loading-full-logo.loading-logo-hand--draw {
  animation: loadingHandDrawOnce 2.4s ease forwards;
}

@keyframes loadingOutlineDrawOnce {
  from { opacity: 0.45; clip-path: inset(0 100% 0 0); }
  to { opacity: 1; clip-path: inset(0 0 0 0); }
}

@keyframes loadingHandDrawOnce {
  from { opacity: 0.35; clip-path: inset(0 100% 0 0); }
  to { opacity: 1; clip-path: inset(0 0 0 0); }
}

.loading-curtain {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  visibility: hidden;
}

.loading-curtain.is-active {
  visibility: visible;
}

.loading-curtain-panel {
  position: absolute;
  left: 0;
  right: 0;
  height: 50%;
  background: var(--bg);
  transition: transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

.loading-curtain-top { top: 0; transform: translateY(0); }
.loading-curtain-bottom { bottom: 0; transform: translateY(0); }

.loading-curtain.is-open .loading-curtain-top {
  transform: translateY(-100%);
}

.loading-curtain.is-open .loading-curtain-bottom {
  transform: translateY(100%);
}

.loading-demo-overlay p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ----- Ch.4 画面遷移（カード + 全画面） ----- */
.transition-patterns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.85rem;
  width: 100%;
}

.transition-pattern {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 0.55rem;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 200px;
}

.transition-pattern-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.4;
  min-height: 2.2em;
}

.transition-thumb {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 96px;
}

.transition-thumb-stage {
  position: relative;
  width: 100%;
  max-width: 140px;
  height: 72px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--bg-stage);
}

.transition-thumb-stage .t-page,
.transition-thumb-stage .transition-page {
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
}

.transition-thumb-stage .page-a,
.transition-thumb-stage .t-page-a {
  background: linear-gradient(135deg, #4338ca, #6366f1);
}

.transition-thumb-stage .page-b,
.transition-thumb-stage .t-page-b {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
}

.transition-thumb-note {
  font-size: 0.625rem;
  color: var(--text-muted);
}

.transition-fs-open {
  width: 100%;
  justify-content: center;
}

.transition-grid {
  display: grid;
  gap: 0.65rem;
  margin-top: 1rem;
  width: 100%;
}

.transition-grid-4x3 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: repeat(3, auto);
  max-width: 520px;
}

.transition-grid-4x3 .btn {
  width: 100%;
  min-height: 36px;
  padding-inline: 0.35rem;
  font-size: 0.75rem;
  white-space: nowrap;
}

/* ----- Ch.5 グローバルナビ ----- */
.gnav-stage {
  padding: 0.15rem 0;
}

#ch5-gnav .demo-stage {
  background: var(--gnav-inset, var(--bg-stage));
}

.gnav-patterns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

@media (max-width: 900px) {
  .gnav-patterns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .gnav-patterns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.gnav-pattern-card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  justify-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0.75rem 0.5rem 0.85rem;
  background: var(--gnav-raised, var(--bg-card));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius);
  box-shadow: var(--gnav-shadow, 0 1px 2px rgba(0, 0, 0, 0.03));
}

.gnav-pattern-label {
  margin: 0;
  min-height: 2.6em;
  font-size: 0.625rem;
  line-height: 1.35;
  text-align: center;
  color: var(--text-muted);
}

.gnav-pattern-thumb {
  width: 100%;
  min-height: 92px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: visible;
  padding: 0.35rem 0.5rem;
  background: var(--gnav-inset, var(--bg-stage));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: calc(var(--radius) - 2px);
}

.gnav-pattern-thumb:has(.gnav-scroll-stage) {
  align-items: stretch;
  min-height: 140px;
}

.gnav-pattern-thumb:has(.gnav-scroll-stage) .gnav-scroll-stage {
  width: 100%;
}

.gnav-fs-open {
  width: 100%;
  justify-content: center;
}

.gnav-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: var(--bg);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  overflow-y: auto;
}

.gnav-fs-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.gnav-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  width: min(100%, 52rem);
  max-height: calc(100dvh - 2rem);
  margin: auto;
  padding: 2.5rem 0 1rem;
}

.gnav-fs-mode-label {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
  flex-shrink: 0;
}

.gnav-fs-body {
  padding: 1rem 1.25rem 1.25rem;
  background: var(--gnav-inset, var(--bg-stage));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius-lg);
  overflow: visible;
}

.gnav-fs-body:has(.gnav-scroll-stage--fs) {
  overflow: hidden;
}

.gnav-fs-body .gnav-panel-hint {
  margin-bottom: 0.65rem;
}

.gnav-fs-body .gnav-scroll-stage--fs {
  display: block;
  width: 100%;
  height: min(56vh, 420px);
  min-height: 280px;
  max-height: min(56vh, 420px);
}

.gnav-fs-hint {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

.gnav-fs-arrow-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem;
  background: var(--gnav-raised, var(--surface-1));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius);
}

.gnav-fs-arrow-controls[hidden] {
  display: none !important;
}

.gnav-fs-overlay .fs-close {
  z-index: 10001;
}

.gnav-scroll-stage--thumb {
  height: 140px;
  width: 100%;
}

.gnav-scroll-stage--fs {
  height: min(58vh, 400px);
}

.gnav-scroll-spacer--thumb {
  height: 220px;
}

.gnav-scroll-spacer--thumb.gnav-scroll-spacer--follow {
  height: 380px;
}

.gnav-scroll-spacer {
  height: 420px;
  border-radius: var(--radius);
  background: repeating-linear-gradient(
    180deg,
    var(--surface-2) 0,
    var(--surface-2) 12px,
    transparent 12px,
    transparent 24px
  );
}

.gnav-scroll-spacer.gnav-scroll-spacer--follow {
  height: 880px;
}

.gnav-fs-body .gnav-scroll-stage--fs[data-gnav-scroll="scroll-follow"] {
  display: flex;
  flex-direction: column;
  height: min(62vh, 480px);
  min-height: 300px;
  max-height: min(62vh, 480px);
}

.gnav-demo--thumb {
  width: 100%;
  padding: 0.35rem 0.5rem;
}

.gnav-demo--thumb .gnav-link {
  padding: 0.45rem 0.55rem;
  font-size: 0.6875rem;
}

.gnav-demo--thumb .gnav-dropdown-photo {
  min-width: 180px;
}

.gnav-demo--thumb .gnav-photo-thumb {
  width: 32px;
  height: 32px;
}

.gnav-arrow-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-right: 0.15rem;
}

[data-gnav-arrow="off"] .gnav-arrow {
  display: none;
}

[data-gnav-arrow="off"] .gnav-item.has-dropdown:hover .gnav-arrow {
  transform: none;
}

.gnav-panel-hint {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.gnav-demo {
  background: var(--gnav-bar, var(--bg-card));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius);
  box-shadow: var(--gnav-bar-shadow, 0 1px 4px rgba(0, 0, 0, 0.05));
  padding: 0.5rem 1rem;
  overflow: visible;
}

.gnav-demo-left {
  padding-right: 2rem;
}

.gnav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem;
  list-style: none;
}

.gnav-item {
  position: relative;
}

.gnav-demo,
.gnav-dropdown {
  color: var(--text-on-card, var(--text));
}

.gnav-link {
  display: block;
  padding: 0.75rem 1rem;
  color: inherit;
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
  cursor: default;
}

.gnav-link:hover { color: var(--accent); }

.gnav-arrow {
  display: inline-block;
  margin-left: 0.25rem;
  font-size: 0.75rem;
  opacity: 0.7;
  transition: transform 0.2s;
}

.gnav-item.has-dropdown:hover .gnav-arrow {
  transform: rotate(180deg);
}

.gnav-demo-left .gnav-item.has-dropdown:hover .gnav-arrow {
  transform: none;
}

.gnav-dropdown {
  position: absolute;
  background: var(--gnav-bar, var(--bg-card));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: 8px;
  box-shadow: var(--gnav-shadow, var(--shadow));
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
  z-index: 10;
  list-style: none;
  padding: 0.35rem 0;
}

.gnav-dropdown-down {
  top: 100%;
  left: 0;
  min-width: 160px;
  transform: translateY(8px);
}

.gnav-item:hover .gnav-dropdown-down {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.gnav-dropdown-left {
  top: 0;
  left: 100%;
  min-width: 160px;
  margin-left: 4px;
  transform: translateX(-8px);
}

.gnav-item:hover .gnav-dropdown-left {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.gnav-dropdown a,
.gnav-dropdown-item {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8125rem;
  cursor: default;
}

.gnav-dropdown-item:hover {
  background: var(--surface-1);
  color: var(--accent);
}

.gnav-dropdown-photo {
  min-width: 220px;
  padding: 0.35rem;
}

.gnav-dropdown-photo-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  cursor: default;
  transition: background 0.2s;
}

.gnav-dropdown-photo-item:hover {
  background: var(--surface-1);
}

.gnav-photo-thumb {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  flex-shrink: 0;
}

.gnav-ph1 { background: linear-gradient(135deg, #6366f1, #8b5cf6); }
.gnav-ph2 { background: linear-gradient(135deg, #ec4899, #f43f5e); }
.gnav-ph3 { background: linear-gradient(135deg, #14b8a6, #06b6d4); }

.gnav-photo-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  text-align: left;
}

.gnav-photo-text strong {
  font-size: 0.8125rem;
  color: var(--text);
  font-weight: 600;
}

.gnav-photo-text small {
  font-size: 0.6875rem;
  color: var(--text-muted);
}

/* スクロール連動ヘッダーデモ */
.gnav-scroll-stage {
  width: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius);
  background: var(--gnav-raised, var(--bg-card));
}

.gnav-scroll-lead {
  padding: 1.25rem 1rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
  background: linear-gradient(180deg, var(--surface-2), var(--surface-1));
  border-bottom: 1px solid var(--border);
}

.gnav-scroll-header {
  position: sticky;
  top: 0;
  z-index: 5;
  margin: 0;
  padding: 0;
  background: transparent;
  border: none;
  overflow: hidden;
}

.gnav-scroll-header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  min-height: 52px;
  background: var(--gnav-bar, var(--mini-header-bg));
  border-bottom: 1px solid var(--gnav-border-strong, var(--border));
  transition: transform 0.35s ease, padding 0.3s ease, min-height 0.3s ease, box-shadow 0.3s ease;
}

.gnav-scroll-stage[data-gnav-scroll="sticky"] .gnav-scroll-header-inner {
  box-shadow: var(--shadow);
}

.gnav-scroll-stage[data-gnav-scroll="sticky-delay"] .gnav-scroll-header.is-pinned .gnav-scroll-header-inner {
  box-shadow: var(--shadow);
}

.gnav-scroll-header.is-compact .gnav-scroll-header-inner {
  padding: 0.4rem 1rem;
  min-height: 38px;
}

.gnav-scroll-header.is-compact .gnav-scroll-nav {
  font-size: 0.75rem;
}

.gnav-scroll-header.is-hidden .gnav-scroll-header-inner {
  transform: translateY(calc(-100% - 1px));
}

.gnav-scroll-header.is-hamburger-mode .gnav-scroll-nav {
  display: none;
}

.gnav-scroll-header.is-hamburger-mode .gnav-scroll-hamburger {
  display: flex;
}

.gnav-scroll-header .gnav-scroll-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: 8px;
  background: var(--gnav-inset, var(--surface-2));
  cursor: pointer;
  flex-shrink: 0;
}

.gnav-scroll-hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--text);
  border-radius: 1px;
}

.gnav-scroll-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
  transition: opacity 0.3s, font-size 0.3s, visibility 0.3s;
}

.gnav-scroll-hamburger {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
}

.gnav-scroll-body {
  padding: 1rem;
}

.gnav-scroll-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.gnav-scroll-spacer {
  height: 420px;
  border-radius: var(--radius);
  background: repeating-linear-gradient(
    180deg,
    var(--surface-2) 0,
    var(--surface-2) 12px,
    transparent 12px,
    transparent 24px
  );
}

/* 追従サイドナビ */
.gnav-follow-stage {
  display: flex;
  flex-direction: column;
  padding: 0 !important;
  overflow: hidden !important;
}

.gnav-follow-scroller {
  flex: 1 1 auto;
  min-height: 0;
  height: 100%;
  width: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

.gnav-follow-wrap,
.gnav-spy-wrap {
  display: flex;
  align-items: stretch;
  gap: 0;
  width: 100%;
  min-height: min-content;
}

.gnav-follow-nav-col {
  flex-shrink: 0;
  width: 5.5rem;
  align-self: stretch;
  background: var(--gnav-inset, var(--surface-2));
  border-right: 1px solid var(--gnav-border-strong, var(--border));
}

.gnav-scroll-stage--fs .gnav-follow-nav-col {
  width: 7.5rem;
}

.gnav-follow-nav {
  position: sticky;
  top: 0;
  z-index: 2;
  padding: 0.5rem 0.4rem;
  box-sizing: border-box;
}

.gnav-scroll-stage--fs .gnav-follow-nav {
  padding: 0.75rem 0.55rem;
}

.gnav-spy-wrap .g-nav {
  flex-shrink: 0;
  width: 5.5rem;
  padding: 0.5rem 0.4rem;
  background: var(--gnav-inset, var(--surface-2));
  border-right: 1px solid var(--gnav-border-strong, var(--border));
  position: sticky;
  top: 0;
  align-self: flex-start;
}

.gnav-scroll-stage--fs .gnav-follow-nav,
.gnav-scroll-stage--fs .gnav-spy-wrap .g-nav {
  width: 7.5rem;
  padding: 0.75rem 0.55rem;
}

.gnav-spy-header {
  position: sticky;
  top: 0;
  z-index: 3;
  padding: 0.45rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text);
  background: var(--gnav-bar, var(--mini-header-bg));
  border-bottom: 1px solid var(--gnav-border-strong, var(--border));
}

.gnav-scroll-stage--fs .gnav-spy-header {
  padding: 0.65rem 0.75rem;
  font-size: 0.875rem;
}

.gnav-spy-wrap .g-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.gnav-spy-wrap .g-nav a {
  display: block;
  padding: 0.35rem 0.45rem;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 0.6875rem;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.gnav-spy-wrap .g-nav li.current a,
.gnav-spy-wrap .g-nav a:hover {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  font-weight: 600;
}

.gnav-follow-nav-title {
  margin: 0 0 0.45rem;
  font-size: 0.625rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.gnav-follow-navlist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.gnav-follow-body,
.gnav-spy-body {
  flex: 1;
  min-width: 0;
  padding: 0.65rem 0.5rem 0.75rem;
}

.gnav-spy-section {
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px dashed var(--border);
}

.gnav-spy-section:last-child {
  margin-bottom: 0;
}

.gnav-spy-section-title {
  margin: 0 0 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
}

.gnav-spy-section p {
  margin: 0;
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.gnav-scroll-stage--fs .gnav-spy-section {
  min-height: 140px;
}

.gnav-scroll-stage--thumb .gnav-spy-section {
  min-height: 88px;
}

.gnav-scroll-stage--thumb .gnav-spy-wrap .g-nav a {
  font-size: 0.625rem;
}

/* クリック開閉ナビ */
.gnav-interactive-stage {
  display: flex;
  flex-direction: column;
  padding: 0 !important;
  overflow: hidden;
}

.gnav-interactive-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.45rem 0.55rem;
  background: var(--gnav-bar, var(--mini-header-bg));
  border-bottom: 1px solid var(--gnav-border-strong, var(--border));
  flex-shrink: 0;
  z-index: 2;
}

.gnav-interactive-toggle {
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: 999px;
  background: var(--gnav-inset, var(--surface-2));
  color: var(--text);
  font: inherit;
  font-size: 0.625rem;
  cursor: pointer;
  flex-shrink: 0;
}

.gnav-interactive-main {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.gnav-interactive-content {
  height: 100%;
  overflow: auto;
  padding: 0.55rem 0.5rem;
  transition: filter 0.35s ease, transform 0.35s ease;
}

.gnav-interactive-content-fill {
  height: 52px;
  margin-top: 0.35rem;
  border-radius: calc(var(--radius) - 2px);
  background: repeating-linear-gradient(
    180deg,
    var(--surface-2) 0,
    var(--surface-2) 8px,
    transparent 8px,
    transparent 16px
  );
}

.gnav-interactive-backdrop {
  position: absolute;
  inset: 0;
  z-index: 4;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  pointer-events: none;
}

.gnav-interactive-overlay {
  position: absolute;
  z-index: 5;
  background: var(--gnav-bar, var(--bg-card));
  border: 1px solid var(--gnav-border-strong, var(--border));
  box-shadow: var(--gnav-shadow, var(--shadow));
  overflow: hidden;
  transition:
    transform 0.42s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.35s ease,
    visibility 0.35s ease,
    clip-path 0.55s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.gnav-interactive-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 0.75rem;
}

.gnav-interactive-navlist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
  text-align: center;
}

.gnav-interactive-navlist li span {
  display: block;
  padding: 0.35rem 0.65rem;
  font-size: 0.75rem;
  color: var(--text);
}

.gnav-scroll-stage--fs .gnav-interactive-navlist li span {
  font-size: 0.9375rem;
  padding: 0.45rem 0.85rem;
}

/* パネル方向 */
.gnav-interactive-overlay[data-gnav-variant="panel-down"] {
  top: 0;
  left: 0;
  right: 0;
  max-height: 72%;
  transform: translateY(-102%);
}

.gnav-interactive-overlay[data-gnav-variant="panel-up"] {
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 72%;
  transform: translateY(102%);
}

.gnav-interactive-overlay[data-gnav-variant="panel-lr"] {
  top: 0;
  bottom: 0;
  left: 0;
  width: 72%;
  max-width: 14rem;
  transform: translateX(-102%);
}

.gnav-interactive-overlay[data-gnav-variant="panel-rl"] {
  top: 0;
  bottom: 0;
  right: 0;
  width: 72%;
  max-width: 14rem;
  transform: translateX(102%);
}

.gnav-interactive-overlay[data-gnav-variant="overlay-full"],
.gnav-interactive-overlay[data-gnav-variant="overlay-blur"] {
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transform: scale(1.04);
  border: none;
}

.gnav-interactive-overlay[data-gnav-variant^="circle-"] {
  inset: 0;
  border: none;
  clip-path: circle(0% at 50% 50%);
}

.gnav-interactive-overlay[data-gnav-variant="circle-t"] { clip-path: circle(0% at 50% 0%); }
.gnav-interactive-overlay[data-gnav-variant="circle-b"] { clip-path: circle(0% at 50% 100%); }
.gnav-interactive-overlay[data-gnav-variant="circle-r"] { clip-path: circle(0% at 100% 50%); }
.gnav-interactive-overlay[data-gnav-variant="circle-l"] { clip-path: circle(0% at 0% 50%); }
.gnav-interactive-overlay[data-gnav-variant="circle-tr"] { clip-path: circle(0% at 100% 0%); }
.gnav-interactive-overlay[data-gnav-variant="circle-br"] { clip-path: circle(0% at 100% 100%); }
.gnav-interactive-overlay[data-gnav-variant="circle-tl"] { clip-path: circle(0% at 0% 0%); }
.gnav-interactive-overlay[data-gnav-variant="circle-bl"] { clip-path: circle(0% at 0% 100%); }
.gnav-interactive-overlay[data-gnav-variant="circle-c"] { clip-path: circle(0% at 50% 50%); }

.gnav-interactive-stage.is-open .gnav-interactive-backdrop {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.gnav-interactive-stage.is-open .gnav-interactive-overlay {
  pointer-events: auto;
}

.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="panel-down"],
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="panel-up"],
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="panel-lr"],
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="panel-rl"] {
  transform: translate(0, 0);
  overflow-y: auto;
}

.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="overlay-full"],
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="overlay-blur"] {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant^="circle-"] {
  clip-path: circle(150% at 50% 50%);
}

.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="circle-t"] { clip-path: circle(150% at 50% 0%); }
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="circle-b"] { clip-path: circle(150% at 50% 100%); }
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="circle-r"] { clip-path: circle(150% at 100% 50%); }
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="circle-l"] { clip-path: circle(150% at 0% 50%); }
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="circle-tr"] { clip-path: circle(150% at 100% 0%); }
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="circle-br"] { clip-path: circle(150% at 100% 100%); }
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="circle-tl"] { clip-path: circle(150% at 0% 0%); }
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="circle-bl"] { clip-path: circle(150% at 0% 100%); }
.gnav-interactive-stage.is-open .gnav-interactive-overlay[data-gnav-variant="circle-c"] { clip-path: circle(150% at 50% 50%); }

.gnav-interactive-stage[data-gnav-interactive="overlay-blur"].is-open .gnav-interactive-content {
  filter: blur(4px);
  transform: scale(0.985);
}

/* panel-down サムネ：開いたナビのテキストが切れないよう調整 */
.gnav-scroll-stage--thumb.gnav-interactive-stage[data-gnav-interactive="panel-down"].is-open .gnav-interactive-overlay[data-gnav-variant="panel-down"] {
  max-height: 100% !important;
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
}

.gnav-scroll-stage--thumb.gnav-interactive-stage[data-gnav-interactive="panel-down"].is-open .gnav-interactive-nav {
  height: 100%;
  align-items: center;
  justify-content: flex-start;
  padding: 0.45rem 0.4rem 0.35rem;
}

.gnav-scroll-stage--thumb.gnav-interactive-stage[data-gnav-interactive="panel-down"] .gnav-interactive-navlist {
  width: 100%;
  gap: 0.35rem;
  text-align: center;
}

.gnav-scroll-stage--thumb.gnav-interactive-stage[data-gnav-interactive="panel-down"] .gnav-interactive-navlist li span {
  padding: 0.2rem 0.45rem;
  font-size: 0.6875rem;
  line-height: 1.35;
}

/* ----- Ch.5-2 ハンバーガーメニュー（9パターン） ----- */
.hb-stage {
  padding: 0.5rem;
  background: var(--gnav-inset, var(--bg-stage));
  border-radius: var(--radius);
}

.hb-patterns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

@media (max-width: 900px) {
  .hb-patterns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .hb-patterns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.hb-pattern-card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  justify-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0.75rem 0.5rem 0.85rem;
  background: var(--gnav-raised, var(--bg-card));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius);
}

.hb-pattern-label {
  margin: 0;
  min-height: 2.6em;
  font-size: 0.625rem;
  line-height: 1.35;
  text-align: center;
  color: var(--text-muted);
}

.hb-pattern-thumb {
  width: 100%;
  min-height: 80px;
  padding: 0;
  background: var(--gnav-inset, var(--bg-stage));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: calc(var(--radius) - 2px);
  overflow: hidden;
}

.hb-thumb-stage,
.hb-fs-demo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 80px;
  padding: 0.65rem;
}

.hb-fs-open {
  width: 100%;
  justify-content: center;
}

.hb-spin-row,
.hb-fs-spin-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.hb-spin-core {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex: 0 0 auto;
}

.hb-spin-btns {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.hb-spin-row {
  flex: 0 0 auto;
  align-self: center;
}

#ch5-hamburger .local-controls-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1.25rem;
}

#ch5-hamburger .local-controls-title {
  flex: 0 0 100%;
  margin-bottom: 0;
}

#ch5-hamburger .local-control-item {
  flex: 1 1 160px;
  min-width: 140px;
}

#ch5-hamburger .local-preview-btn {
  flex: 0 0 auto;
  align-self: center;
}

.hb-spin-label {
  display: inline-flex;
  align-items: center;
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.2;
  color: var(--text-muted);
  white-space: nowrap;
}

.hb-spin-hint {
  flex: 0 0 100%;
  width: 100%;
  margin: -0.15rem 0 0;
  font-size: 0.625rem;
  line-height: 1.35;
  color: var(--text-muted);
}

@media (min-width: 720px) {
  .hb-spin-hint {
    flex: 1 1 auto;
    width: auto;
    margin: 0;
  }
}

/* トグルボタン共通 */
.hb-toggle {
  --hb-icon-w: 18px;
  --hb-line-h: 2px;
  --hb-gap: 5px;
  --hb-cross: calc(var(--hb-line-h) + var(--hb-gap));
  --hb-mid: var(--hb-gap);
  --hb-bot: calc(var(--hb-gap) * 2);
  --hb-jump: calc(10px * var(--local-intensity, 1));
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--gnav-border-strong, var(--border));
  background: var(--gnav-inset, var(--surface-2));
  border-radius: 10px;
  cursor: pointer;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  box-sizing: border-box;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.hb-toggle--fs {
  --hb-icon-w: 28px;
  --hb-line-h: 3px;
  --hb-gap: 9px;
  --hb-mid: 9px;
  --hb-bot: 18px;
  width: 80px;
  height: 80px;
  border-radius: 14px;
}

.hb-toggle--stack {
  display: grid;
  place-items: center;
}

.hb-toggle--stack:not(.hb-toggle--fs) {
  width: 44px;
  height: 44px;
  padding: 6px;
}

.hb-toggle--stack.hb-toggle--fs {
  width: 80px;
  height: 80px;
  padding: 10px;
}

.hb-toggle:hover {
  border-color: color-mix(in srgb, var(--border) 70%, var(--accent) 30%);
}

.hb-toggle:focus {
  outline: none;
}

.hb-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ハンバーガー線（通常7パターン・サムネ2px / 全画面3px） */
.hb-toggle .hb-bar {
  display: block;
  width: 100%;
  height: 0;
  min-height: 0;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  border-top: var(--hb-line-h) solid var(--text);
  background: transparent;
  border-radius: 0;
  transform-origin: center;
  box-sizing: border-box;
  flex: 0 0 auto;
  flex-shrink: 0;
  transition:
    top var(--local-duration, 0.35s) cubic-bezier(0.4, 0, 0.2, 1),
    transform var(--local-duration, 0.35s) cubic-bezier(0.4, 0, 0.2, 1),
    opacity calc(0.2s / var(--local-speed, 1)) ease,
    border-top-width var(--local-duration, 0.35s) ease;
}

.hb-toggle.is-open .hb-bars--3 .hb-bar,
.hb-toggle.is-open .hb-bars--2 .hb-bar {
  height: var(--hb-line-h);
  min-height: var(--hb-line-h);
  max-height: var(--hb-line-h);
  border-top-width: 0;
  background-color: var(--text);
}

.hb-bars {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  gap: var(--hb-gap);
  width: var(--hb-icon-w);
  flex-shrink: 0;
}

.hb-bars--3,
.hb-bars--2 {
  display: flex;
}

.hb-toggle.is-open .hb-bars--3,
.hb-toggle.is-open .hb-bars--2 {
  display: block;
  position: relative;
  height: calc(var(--hb-mid) + var(--hb-line-h));
}

.hb-toggle.is-open[data-hb-pattern="lines3-x"] .hb-bars--3,
.hb-toggle.is-open[data-hb-pattern="lines3-rotate-x"] .hb-bars--3,
.hb-toggle.is-open[data-hb-pattern="lines3-persp-x"] .hb-bars--3,
.hb-toggle.is-open[data-hb-pattern="lines3-flip-x"] .hb-bars--3,
.hb-toggle.is-open[data-hb-pattern="lines-jump-x"] .hb-bars--3,
.hb-toggle.is-open[data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 {
  height: calc(var(--hb-line-h) * 3 + var(--hb-gap) * 2);
}

.hb-toggle.is-open[data-hb-pattern="lines2-x"] .hb-bars--2 {
  height: calc(var(--hb-line-h) * 2 + var(--hb-gap));
}

.hb-toggle.is-open:not([data-hb-pattern="lines3-x"]):not([data-hb-pattern="lines3-rotate-x"]):not([data-hb-pattern="lines3-persp-x"]):not([data-hb-pattern="lines3-flip-x"]):not([data-hb-pattern="lines-jump-x"]):not([data-hb-pattern="lines3-one"]):not([data-hb-pattern="menu-close"]) .hb-bars--3 .hb-bar,
.hb-toggle.is-open:not([data-hb-pattern="lines2-x"]) .hb-bars--2 .hb-bar {
  position: absolute;
  left: 0;
  right: 0;
  top: auto;
  margin: 0;
}

.hb-toggle.is-open[data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar,
.hb-toggle.is-open[data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar,
.hb-toggle.is-open[data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar,
.hb-toggle.is-open[data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar,
.hb-toggle.is-open[data-hb-pattern="lines-jump-x"] .hb-bars--3 .hb-bar,
.hb-toggle.is-open[data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar,
.hb-toggle.is-open[data-hb-pattern="lines2-x"] .hb-bars--2 .hb-bar {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0;
}

.hb-toggle.is-open:not([data-hb-pattern="lines3-x"]):not([data-hb-pattern="lines3-rotate-x"]):not([data-hb-pattern="lines3-persp-x"]):not([data-hb-pattern="lines3-flip-x"]):not([data-hb-pattern="lines-jump-x"]):not([data-hb-pattern="lines3-one"]):not([data-hb-pattern="menu-close"]) .hb-bars--3 .hb-bar:nth-child(1) { top: 0; }
.hb-toggle.is-open:not([data-hb-pattern="lines3-x"]):not([data-hb-pattern="lines3-rotate-x"]):not([data-hb-pattern="lines3-persp-x"]):not([data-hb-pattern="lines3-flip-x"]):not([data-hb-pattern="lines-jump-x"]):not([data-hb-pattern="lines3-one"]):not([data-hb-pattern="menu-close"]) .hb-bars--3 .hb-bar:nth-child(2) { top: var(--hb-mid); }
.hb-toggle.is-open:not([data-hb-pattern="lines3-x"]):not([data-hb-pattern="lines3-rotate-x"]):not([data-hb-pattern="lines3-persp-x"]):not([data-hb-pattern="lines3-flip-x"]):not([data-hb-pattern="lines-jump-x"]):not([data-hb-pattern="lines3-one"]):not([data-hb-pattern="menu-close"]) .hb-bars--3 .hb-bar:nth-child(3) { top: var(--hb-bot); }

/* 5-2-1：閉じるときも absolute のまま transition:all で rotate が見える（線幅は共通） */
.hb-toggle[data-hb-pattern="lines3-x"] .hb-bars--3 {
  display: block;
  position: relative;
  width: var(--hb-icon-w);
  height: calc(var(--hb-line-h) * 3 + var(--hb-gap) * 2);
  flex-shrink: 0;
}

.hb-toggle[data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0;
  transform: rotate(0deg);
  transition: all var(--local-duration, 0.4s) cubic-bezier(0.4, 0, 0.2, 1);
}

.hb-toggle[data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar:nth-child(1) {
  top: 0;
}

.hb-toggle[data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar:nth-child(2) {
  top: calc(var(--hb-line-h) + var(--hb-gap));
}

.hb-toggle[data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar:nth-child(3) {
  top: calc((var(--hb-line-h) + var(--hb-gap)) * 2);
}

/* 回転・奥行き・横向き：開いても3本分の高さを保ち、まとめて回転しながら×へ */
.hb-toggle[data-hb-pattern="lines3-rotate-x"] .hb-bars--3,
.hb-toggle[data-hb-pattern="lines3-persp-x"] .hb-bars--3,
.hb-toggle[data-hb-pattern="lines3-flip-x"] .hb-bars--3 {
  display: block;
  position: relative;
  height: calc(var(--hb-line-h) * 3 + var(--hb-gap) * 2);
  transform-origin: center center;
}

.hb-toggle[data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar {
  position: absolute;
  left: 0;
  right: auto;
  margin: 0;
  transform: rotate(0deg);
  transition: all var(--local-duration, 0.4s) cubic-bezier(0.4, 0, 0.2, 1);
}

/* 5-2-6 閉じ：上線はそのまま・中下2本だけ書籍どおり左揃えで段階的に短く */
.hb-toggle[data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar:nth-child(1) {
  top: 0;
  right: 0;
  width: auto;
}

.hb-toggle[data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar:nth-child(2) {
  top: var(--hb-cross);
  width: 70%;
}

.hb-toggle[data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar:nth-child(3) {
  top: calc(var(--hb-cross) * 2);
  width: 45%;
}

.hb-toggle[data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar,
.hb-toggle[data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0;
  transform: rotate(0deg);
  transition: all var(--local-duration, 0.4s) cubic-bezier(0.4, 0, 0.2, 1);
}

.hb-toggle[data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle[data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar:nth-child(1) {
  top: 0;
}

.hb-toggle[data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar:nth-child(2),
.hb-toggle[data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar:nth-child(2) {
  top: var(--hb-cross);
}

.hb-toggle[data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle[data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar:nth-child(3) {
  top: calc(var(--hb-cross) * 2);
}

.hb-toggle.is-open:not([data-hb-pattern="lines2-x"]) .hb-bars--2 .hb-bar:nth-child(1) { top: 0; }
.hb-toggle.is-open:not([data-hb-pattern="lines2-x"]) .hb-bars--2 .hb-bar:nth-child(2) { top: var(--hb-bot); }

/* 5-2-2：閉じ＝上長・下短・左揃え（書籍どおり・太さは共通のまま） */
.hb-toggle[data-hb-pattern="lines2-x"] .hb-bars--2 {
  display: block;
  position: relative;
  width: var(--hb-icon-w);
  height: calc(var(--hb-line-h) * 2 + var(--hb-gap));
  flex-shrink: 0;
}

.hb-toggle[data-hb-pattern="lines2-x"] .hb-bars--2 .hb-bar {
  position: absolute;
  left: 0;
  right: auto;
  margin: 0;
  transform: rotate(0deg);
  transition: all var(--local-duration, 0.4s) cubic-bezier(0.4, 0, 0.2, 1);
}

.hb-toggle[data-hb-pattern="lines2-x"] .hb-bars--2 .hb-bar:nth-child(1) {
  top: 0;
  width: 100%;
}

.hb-toggle[data-hb-pattern="lines2-x"] .hb-bars--2 .hb-bar:nth-child(2) {
  top: calc(var(--hb-line-h) + var(--hb-gap));
  width: 50%;
}

.hb-toggle.is-open[data-hb-pattern="lines2-x"] .hb-bars--2 .hb-bar {
  left: 0;
  right: 0;
  width: auto;
}

/* 書籍 5-2-4 / 5-2-5（hb-book = 旧クラス名のキャッシュ影響を受けない） */
.hb-book {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--hb-gap);
  width: max-content;
  max-width: 100%;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.hb-toggle--fs .hb-book {
  gap: var(--hb-gap);
}

.hb-book-mark {
  position: relative;
  width: var(--hb-icon-w);
  flex-shrink: 0;
}

.hb-book-text {
  display: grid;
  place-items: center;
  width: max-content;
  min-width: var(--hb-icon-w);
  height: 7px;
  flex-shrink: 0;
  font-family: Inter, "Noto Sans JP", sans-serif;
  font-size: 7px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
  text-align: center;
  color: var(--text);
}

.hb-toggle--fs .hb-book-text {
  height: 11px;
  font-size: 11px;
}

.hb-book-menu,
.hb-book-close {
  grid-area: 1 / 1;
  position: static;
  width: max-content;
  max-width: 100%;
  margin: 0;
  padding: 0;
  text-align: center;
  white-space: nowrap;
  transform: none;
  pointer-events: none;
  transition: opacity var(--local-duration, 0.35s) ease;
}

.hb-book-close {
  opacity: 0;
}

.hb-toggle:not(.is-open) .hb-book-menu {
  opacity: 1;
}

.hb-toggle:not(.is-open) .hb-book-close {
  opacity: 0;
}

.hb-toggle.is-open .hb-book-menu {
  opacity: 0;
}

.hb-toggle.is-open .hb-book-close {
  opacity: 1;
}

/* 5-2-5 MENU→×：上線・MENU・下線 */
.hb-book-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--hb-gap);
  width: var(--hb-icon-w);
}

/* menu-close・menu-x の線は .hb-toggle .hb-bar（border-top）をそのまま使用 */

.hb-book-stack .hb-bar {
  width: 100%;
}

/* 5-2-5：5-2-1同様（transition:all・開くと top が中央へ＋rotate・MENUは opacity） */
.hb-toggle[data-hb-pattern="menu-x"] {
  --hb-menu-label-h: 7px;
}

.hb-toggle--fs[data-hb-pattern="menu-x"] {
  --hb-menu-label-h: 11px;
}

.hb-toggle[data-hb-pattern="menu-x"] .hb-book-stack {
  display: block;
  position: relative;
  width: var(--hb-icon-w);
  height: calc(var(--hb-line-h) * 2 + var(--hb-gap) * 2 + var(--hb-menu-label-h));
  flex-shrink: 0;
}

.hb-toggle[data-hb-pattern="menu-x"] .hb-book-stack .hb-bar {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0;
  transform: rotate(0deg);
  transform-origin: center center;
  transition: all var(--local-duration, 0.4s) cubic-bezier(0.4, 0, 0.2, 1);
}

.hb-toggle[data-hb-pattern="menu-x"] .hb-book-stack .hb-bar:nth-child(1) {
  top: 0;
}

.hb-toggle[data-hb-pattern="menu-x"] .hb-book-stack .hb-bar:nth-child(3) {
  top: calc(var(--hb-line-h) + var(--hb-gap) + var(--hb-menu-label-h) + var(--hb-gap));
}

.hb-toggle[data-hb-pattern="menu-x"] .hb-book-mid {
  position: absolute;
  top: calc(var(--hb-line-h) + var(--hb-gap));
  left: 0;
  right: 0;
  transition: opacity calc(0.2s / var(--local-speed, 1)) ease;
}

.hb-toggle.is-open[data-hb-pattern="menu-x"] .hb-book-mid {
  opacity: 0;
}

.hb-book-mid {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 7px;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Inter, "Noto Sans JP", sans-serif;
  font-size: 7px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
  text-align: center;
  color: var(--text);
  flex: 0 0 auto;
}

.hb-toggle--fs .hb-book-mid {
  height: 11px;
  line-height: 11px;
  font-size: 11px;
  flex-basis: 11px;
}

/* 5-2-4：3本線（MENU→CLOSE）— lines3-x と同じ absolute で×の中心を揃える */
.hb-toggle[data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 {
  display: block;
  position: relative;
  width: var(--hb-icon-w);
  height: calc(var(--hb-line-h) * 3 + var(--hb-gap) * 2);
}

.hb-toggle[data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0;
  transform: rotate(0deg);
  transition: all var(--local-duration, 0.4s) cubic-bezier(0.4, 0, 0.2, 1);
}

.hb-toggle[data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar:nth-child(1) {
  top: 0;
}

.hb-toggle[data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar:nth-child(2) {
  top: calc(var(--hb-line-h) + var(--hb-gap));
}

.hb-toggle[data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar:nth-child(3) {
  top: calc((var(--hb-line-h) + var(--hb-gap)) * 2);
}

/* 3本線 → ×（中央の線は非表示） */
.hb-toggle.is-open:not([data-hb-pattern="lines3-one"]) .hb-bars--3 .hb-bar:nth-child(2) {
  opacity: 0;
}

/* ×共通：開いた2本をコンテナ中央の同一点へ（translateY なし・左右対称） */
.hb-toggle.is-open[data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-hb-pattern="lines-jump-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="lines-jump-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-hb-pattern="lines2-x"] .hb-bars--2 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="lines2-x"] .hb-bars--2 .hb-bar:nth-child(2),
.hb-toggle.is-open[data-hb-pattern="menu-x"] .hb-book-stack .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="menu-x"] .hb-book-stack .hb-bar:nth-child(3) {
  top: 50%;
  left: 0;
  right: 0;
  width: auto;
  height: var(--hb-line-h);
  min-height: var(--hb-line-h);
  max-height: var(--hb-line-h);
  margin-top: calc(var(--hb-line-h) / -2);
  border-top-width: 0;
  background-color: var(--text);
  transform-origin: center center;
}

/* 3本線系・MENU→CLOSE：右回り */
.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar:nth-child(1) {
  transform: rotate(-45deg);
}

.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-x-spin="right"][data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar:nth-child(3) {
  transform: rotate(45deg);
}

/* 3本線系・MENU→CLOSE：左回り */
.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar:nth-child(1) {
  transform: rotate(45deg);
}

.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="lines3-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="lines3-rotate-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="lines3-persp-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="lines3-flip-x"] .hb-bars--3 .hb-bar:nth-child(3),
.hb-toggle.is-open[data-x-spin="left"][data-hb-pattern="menu-close"] .hb-book-mark .hb-bars--3 .hb-bar:nth-child(3) {
  transform: rotate(-45deg);
}

/* 2本線・MENU→×：右回り */
.hb-toggle.is-open[data-hb-pattern="lines2-x"][data-x-spin="right"] .hb-bars--2 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="menu-x"][data-x-spin="right"] .hb-book-stack .hb-bar:nth-child(1) {
  transform: rotate(45deg);
}

.hb-toggle.is-open[data-hb-pattern="lines2-x"][data-x-spin="right"] .hb-bars--2 .hb-bar:nth-child(2),
.hb-toggle.is-open[data-hb-pattern="menu-x"][data-x-spin="right"] .hb-book-stack .hb-bar:nth-child(3) {
  transform: rotate(-45deg);
}

/* 2本線・MENU→×：左回り */
.hb-toggle.is-open[data-hb-pattern="lines2-x"][data-x-spin="left"] .hb-bars--2 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="menu-x"][data-x-spin="left"] .hb-book-stack .hb-bar:nth-child(1) {
  transform: rotate(-45deg);
}

.hb-toggle.is-open[data-hb-pattern="lines2-x"][data-x-spin="left"] .hb-bars--2 .hb-bar:nth-child(2),
.hb-toggle.is-open[data-hb-pattern="menu-x"][data-x-spin="left"] .hb-book-stack .hb-bar:nth-child(3) {
  transform: rotate(45deg);
}

/* 3本線 → 1本線（開き：残った1本をアイコン内の縦横中央へ） */
.hb-toggle.is-open[data-hb-pattern="lines3-one"] .hb-bars--3 {
  height: calc(var(--hb-line-h) * 3 + var(--hb-gap) * 2);
}

.hb-toggle.is-open[data-hb-pattern="lines3-one"] .hb-bars--3 .hb-bar {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0;
}

.hb-toggle.is-open[data-hb-pattern="lines3-one"] .hb-bars--3 .hb-bar:nth-child(1),
.hb-toggle.is-open[data-hb-pattern="lines3-one"] .hb-bars--3 .hb-bar:nth-child(3) {
  top: calc(50% - var(--hb-line-h) / 2);
  opacity: 0;
  transform: scaleX(0);
}

.hb-toggle.is-open[data-hb-pattern="lines3-one"] .hb-bars--3 .hb-bar:nth-child(2) {
  top: calc(50% - var(--hb-line-h) / 2);
  left: 0;
  right: 0;
  opacity: 1;
  transform: none;
}

/* 3本線が回転して× */
.hb-toggle[data-hb-pattern="lines3-rotate-x"] .hb-bars--3 {
  transition: transform var(--local-duration, 0.35s) cubic-bezier(0.4, 0, 0.2, 1);
}

.hb-toggle.is-open[data-hb-pattern="lines3-rotate-x"][data-x-spin="right"] .hb-bars--3 {
  transform: rotate(calc(180deg * var(--local-intensity, 1)));
}

.hb-toggle.is-open[data-hb-pattern="lines3-rotate-x"][data-x-spin="left"] .hb-bars--3 {
  transform: rotate(calc(-180deg * var(--local-intensity, 1)));
}

/* 奥行き回転 */
.hb-toggle[data-hb-pattern="lines3-persp-x"] {
  perspective: 320px;
}

.hb-toggle[data-hb-pattern="lines3-persp-x"] .hb-bars--3 {
  transition: transform var(--local-duration, 0.35s) cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}

.hb-toggle.is-open[data-hb-pattern="lines3-persp-x"][data-x-spin="right"] .hb-bars--3 {
  transform: rotateY(calc(180deg * var(--local-intensity, 1)));
}

.hb-toggle.is-open[data-hb-pattern="lines3-persp-x"][data-x-spin="left"] .hb-bars--3 {
  transform: rotateY(calc(-180deg * var(--local-intensity, 1)));
}

/* 横向き回転 */
.hb-toggle[data-hb-pattern="lines3-flip-x"] {
  perspective: 320px;
}

.hb-toggle[data-hb-pattern="lines3-flip-x"] .hb-bars--3 {
  transition: transform var(--local-duration, 0.35s) cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}

.hb-toggle.is-open[data-hb-pattern="lines3-flip-x"][data-x-spin="right"] .hb-bars--3 {
  transform: rotateX(calc(180deg * var(--local-intensity, 1)));
}

.hb-toggle.is-open[data-hb-pattern="lines3-flip-x"][data-x-spin="left"] .hb-bars--3 {
  transform: rotateX(calc(-180deg * var(--local-intensity, 1)));
}

/* ジャンプして× */
.hb-toggle[data-hb-pattern="lines-jump-x"].is-open .hb-bars--3 .hb-bar {
  transition: none;
  animation-duration: var(--local-duration, 0.35s);
  animation-timing-function: cubic-bezier(0.34, 1.35, 0.64, 1);
  animation-fill-mode: forwards;
}

.hb-toggle[data-hb-pattern="lines-jump-x"]:not(.is-open) .hb-bars--3,
.hb-toggle[data-hb-pattern="lines-jump-x"]:not(.is-open) .hb-bars--3 .hb-bar {
  animation: none !important;
}

.hb-toggle[data-hb-pattern="lines3-rotate-x"]:not(.is-open) .hb-bars--3 {
  transform: rotate(0deg);
}

.hb-toggle[data-hb-pattern="lines3-persp-x"]:not(.is-open) .hb-bars--3 {
  transform: rotateY(0deg);
}

.hb-toggle[data-hb-pattern="lines3-flip-x"]:not(.is-open) .hb-bars--3 {
  transform: rotateX(0deg);
}

@keyframes hbJumpBar1 {
  0% { transform: rotate(0deg); }
  45% { transform: translateY(calc(var(--hb-cross) - var(--hb-jump))) rotate(0deg); }
  100% { transform: rotate(-45deg); }
}

@keyframes hbJumpBar1Left {
  0% { transform: rotate(0deg); }
  45% { transform: translateY(calc(var(--hb-cross) - var(--hb-jump))) rotate(0deg); }
  100% { transform: rotate(45deg); }
}

@keyframes hbJumpBar2 {
  0% { opacity: 1; transform: scaleX(1); }
  40% { opacity: 1; transform: translateY(calc(-1 * var(--hb-jump))) scaleX(1); }
  100% { opacity: 0; transform: scaleX(0); }
}

@keyframes hbJumpBar3 {
  0% { transform: rotate(0deg); }
  50% { transform: translateY(calc(var(--hb-cross) + var(--hb-jump))) rotate(0deg); }
  100% { transform: rotate(45deg); }
}

@keyframes hbJumpBar3Left {
  0% { transform: rotate(0deg); }
  50% { transform: translateY(calc(var(--hb-cross) + var(--hb-jump))) rotate(0deg); }
  100% { transform: rotate(-45deg); }
}

.hb-toggle.is-open[data-hb-pattern="lines-jump-x"][data-x-spin="right"] .hb-bars--3 .hb-bar:nth-child(1) {
  animation-name: hbJumpBar1;
}

.hb-toggle.is-open[data-hb-pattern="lines-jump-x"][data-x-spin="left"] .hb-bars--3 .hb-bar:nth-child(1) {
  animation-name: hbJumpBar1Left;
}

.hb-toggle.is-open[data-hb-pattern="lines-jump-x"] .hb-bars--3 .hb-bar:nth-child(2) {
  animation-name: hbJumpBar2;
}

.hb-toggle.is-open[data-hb-pattern="lines-jump-x"][data-x-spin="right"] .hb-bars--3 .hb-bar:nth-child(3) {
  animation-name: hbJumpBar3;
}

.hb-toggle.is-open[data-hb-pattern="lines-jump-x"][data-x-spin="left"] .hb-bars--3 .hb-bar:nth-child(3) {
  animation-name: hbJumpBar3Left;
}

/* 全画面オーバーレイ */
.hb-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 1rem;
  background: var(--bg);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  overflow-y: auto;
  overscroll-behavior-x: none;
}

html.hb-fs-active,
html.hb-fs-active body {
  overscroll-behavior-x: none;
}

#ch5-hamburger .local-controls input[type="range"],
.hb-fs-controls input[type="range"] {
  touch-action: none;
}

.hb-fs-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.hb-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 0 0.25rem;
  min-height: 0;
  flex: 1;
}

.hb-fs-main {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  min-height: 0;
}

.hb-fs-mode-label {
  margin: 0 0 0.65rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
}

.hb-fs-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: min(52vh, 420px);
  padding: 2rem 1.5rem;
  background: var(--gnav-inset, var(--surface-1));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius-lg);
}

.hb-fs-hint {
  margin: 0.75rem 0 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

.hb-fs-overlay .fs-close {
  z-index: 10001;
}

.hb-fs-controls {
  flex-shrink: 0;
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}

.hb-fs-controls-title {
  flex: 0 0 100%;
  margin: 0 0 0.15rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
}

.hb-fs-control-item {
  flex: 1 1 140px;
  min-width: 120px;
}

.hb-fs-spin-row {
  flex: 0 0 auto;
  align-self: center;
  padding: 0;
  border: none;
}

.hb-fs-controls-hint {
  flex: 0 0 100%;
  margin: 0.15rem 0 0;
}

.hb-fs-spin-row[hidden] {
  display: none !important;
}

.hb-fs-control-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.hb-fs-control-label {
  font-size: 0.8125rem;
  color: var(--text);
}

.hb-fs-control-label small {
  display: block;
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 400;
}

.hb-fs-control-item input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.hb-fs-intensity-val,
.hb-fs-speed-val {
  font-size: 0.75rem;
  color: var(--accent);
}

.hb-fs-controls-hint {
  margin: 0;
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ----- Ch.5 テキストナビ ----- */
.textnav-stage {
  padding: 0.25rem 0;
}

#ch5-textnav .demo-stage {
  background: var(--gnav-inset, var(--bg-stage));
}

.textnav-patterns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.85rem;
}

.textnav-pattern {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 0.55rem;
  padding: 0.85rem 1rem 1rem;
  background: var(--gnav-raised, var(--bg-card));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius);
  box-shadow: var(--gnav-shadow, 0 1px 2px rgba(0, 0, 0, 0.03));
}

.textnav-pattern-label {
  min-height: 3.2em;
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.textnav-pattern-label small {
  display: block;
  font-size: 0.625rem;
  color: var(--text-muted);
  opacity: 0.85;
  margin-top: 0.15rem;
}

.textnav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.textnav-pattern .textnav-list {
  display: flex;
  flex-wrap: nowrap;
  align-self: stretch;
  align-items: center;
  justify-content: stretch;
  gap: 0;
  width: 100%;
  height: 120px;
  min-height: 120px;
  margin: 0;
  padding: 0.75rem 1rem;
  background: var(--gnav-inset, var(--bg-stage));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: calc(var(--radius) - 2px);
  box-sizing: border-box;
}

.textnav-pattern .textnav-list li {
  display: flex;
  flex: 1 1 0;
  min-width: 0;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0;
}

.textnav-pattern .textnav-link {
  max-width: 100%;
  text-align: center;
}

.textnav-pattern .textnav-link--center-out-mid {
  min-width: 0;
  min-height: 0;
  padding: 0.25rem 0.1rem;
}

.textnav-pattern .textnav-link--dot-line {
  padding-left: 0;
}

/* 入れ替え：サムネは列の中央に置くだけ。動き（overflow・transform）は本編CSSのまま */
.textnav-pattern .textnav-link--swap {
  display: inline-block;
  vertical-align: top;
}

.textnav-link {
  position: relative;
  display: inline-block;
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  line-height: 1.4;
  cursor: default;
  z-index: 0;
}

.textnav-link::before,
.textnav-link::after {
  pointer-events: none;
}

/* 1. 中心から外に線（下部） */
.textnav-link--center-out-bottom {
  padding-bottom: 6px;
}

.textnav-link--center-out-bottom::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.32s ease;
}

.textnav-link--center-out-bottom:hover::after {
  transform: scaleX(1);
}

/* 2. 中心から外に線（中央）— テキストの垂直中央で左右に伸びる */
.textnav-link--center-out-mid {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 4.5rem;
  min-height: 2.35rem;
  padding: 0 0.15rem;
}

.textnav-mid-label {
  position: relative;
  z-index: 1;
  padding: 0 0.15rem;
}

.textnav-link--center-out-mid::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: translateY(-50%) scaleX(0);
  transform-origin: center center;
  transition: transform 0.32s ease;
}

.textnav-link--center-out-mid:hover::after {
  transform: translateY(-50%) scaleX(1);
}

/* 3. 左から右に線（下部） */
.textnav-link--lr-bottom {
  padding-bottom: 6px;
}

.textnav-link--lr-bottom::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.32s ease;
}

.textnav-link--lr-bottom:hover::after {
  width: 100%;
}

/* 4. 左から右に線（上部） */
.textnav-link--lr-top {
  padding-top: 6px;
}

.textnav-link--lr-top::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.32s ease;
}

.textnav-link--lr-top:hover::after {
  width: 100%;
}

/* 5. 左から右に背景が伸びる（文字の背面だけ・全面の塗りつぶしにしない） */
.textnav-link--lr-bg {
  padding: 0.3rem 0.55rem;
}

.textnav-link--lr-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  border: none;
  border-radius: 0;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.35s ease;
}

.textnav-link--lr-bg:hover::before {
  transform: scaleX(1);
  background: color-mix(in srgb, var(--accent) 22%, transparent);
}

html[data-theme="dark"] .textnav-link--lr-bg::before {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
}

html[data-theme="dark"] .textnav-link--lr-bg:hover::before {
  background: color-mix(in srgb, var(--accent) 28%, transparent);
}

/* 6. 左から右に線が伸びて背景になる */
.textnav-link--line-to-bg {
  padding: 0.3rem 0.55rem;
}

.textnav-link--line-to-bg::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition:
    width 0.22s ease,
    height 0.28s ease 0.18s,
    bottom 0.28s ease 0.18s;
  z-index: -1;
}

.textnav-link--line-to-bg:hover::after {
  width: 100%;
  height: 100%;
  bottom: 0;
  background: color-mix(in srgb, var(--accent) 20%, transparent);
}

/* 7. 上下の線が伸びて背景になる */
.textnav-link--tb-to-bg {
  padding: 0.35rem 0.55rem;
}

.textnav-link--tb-to-bg::before,
.textnav-link--tb-to-bg::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transition: height 0.34s ease;
  z-index: -1;
}

.textnav-link--tb-to-bg::before {
  top: 0;
}

.textnav-link--tb-to-bg::after {
  bottom: 0;
}

.textnav-link--tb-to-bg:hover::before,
.textnav-link--tb-to-bg:hover::after {
  height: 52%;
  background: color-mix(in srgb, var(--accent) 20%, transparent);
}

/* 8. ドットが線に変化 */
.textnav-link--dot-line {
  padding-bottom: 8px;
  padding-left: 0.15rem;
}

.textnav-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 0.4rem;
  vertical-align: middle;
  background: var(--accent);
  border-radius: 50%;
  transition:
    width 0.32s ease,
    height 0.32s ease,
    border-radius 0.32s ease,
    margin 0.32s ease,
    opacity 0.2s ease;
}

.textnav-link--dot-line::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.32s ease 0.05s;
}

.textnav-link--dot-line:hover .textnav-dot {
  width: 0;
  height: 0;
  margin-right: 0;
  opacity: 0;
}

.textnav-link--dot-line:hover::after {
  width: 100%;
}

/* 9. テキストが入れ替わる */
.textnav-link--swap {
  --textnav-swap-line: 1.4em;
  --textnav-swap-bleed: 0.16em;
  overflow: hidden;
  height: var(--textnav-swap-line);
  vertical-align: top;
}

.textnav-swap {
  display: flex;
  flex-direction: column;
  transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.textnav-swap span {
  display: block;
  height: var(--textnav-swap-line);
  line-height: 1;
  padding: 0.12em 0 var(--textnav-swap-bleed);
  box-sizing: border-box;
  white-space: nowrap;
  overflow: hidden;
}

.textnav-swap span:last-child {
  color: var(--accent);
  font-weight: 500;
}

.textnav-link--swap:hover .textnav-swap {
  transform: translateY(calc(-1 * var(--textnav-swap-line) - var(--textnav-swap-bleed)));
}

/* 10・11. 枠線アニメーション共通 */
.textnav-link--line-frame,
.textnav-link--lr-frame {
  padding: 0.35rem 0.65rem;
}

.textnav-frame {
  --textnav-frame-stroke: 2px;
  --textnav-frame-solid-line: 0.58s;
  --textnav-frame-solid-lr: 0.46s;
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: none;
}

.textnav-frame-line {
  position: absolute;
  display: block;
  margin: 0;
  padding: 0;
  border: 0;
  font-style: normal;
  line-height: 0;
  background: var(--accent);
}

.textnav-frame-line--t,
.textnav-frame-line--b {
  left: 0;
  height: var(--textnav-frame-stroke);
  width: 0;
}

.textnav-frame-line--t {
  top: 0;
}

.textnav-frame-line--b {
  bottom: 0;
}

.textnav-frame-line--l,
.textnav-frame-line--r {
  width: var(--textnav-frame-stroke);
  height: 0;
}

.textnav-frame-line--l {
  left: 0;
}

.textnav-frame-line--r {
  right: 0;
}

.textnav-link--line-frame .textnav-frame-line--l,
.textnav-link--line-frame .textnav-frame-line--r {
  top: auto;
  bottom: 0;
}

.textnav-link--lr-frame .textnav-frame-line--l,
.textnav-link--lr-frame .textnav-frame-line--r {
  top: 50%;
  transform: translateY(-50%);
}

.textnav-link--lr-frame .textnav-frame-line--t,
.textnav-link--lr-frame .textnav-frame-line--b {
  left: 50%;
  transform: translateX(-50%);
}

/* 10. 下線 → 左右 → 上線 */
.textnav-link--line-frame:hover .textnav-frame-line--b {
  left: 0;
  width: 100%;
  transition: width 0.22s ease;
}

.textnav-link--line-frame:hover .textnav-frame-line--l,
.textnav-link--line-frame:hover .textnav-frame-line--r {
  top: var(--textnav-frame-stroke);
  bottom: auto;
  height: calc(100% - (var(--textnav-frame-stroke) * 2));
  transition: height 0.22s ease 0.18s, top 0.22s ease 0.18s;
}

.textnav-link--line-frame:hover .textnav-frame-line--t {
  left: 0;
  width: 100%;
  transition: width 0.22s ease 0.36s;
}

.textnav-link--line-frame:not(:hover) .textnav-frame-line {
  transition: none;
}

/* 11. 左右（中央から）→ 上下（中央から） */
.textnav-link--lr-frame:hover .textnav-frame-line--l,
.textnav-link--lr-frame:hover .textnav-frame-line--r {
  top: var(--textnav-frame-stroke);
  bottom: auto;
  height: calc(100% - (var(--textnav-frame-stroke) * 2));
  transform: none;
  transition: height 0.24s ease, top 0.24s ease, transform 0.24s ease;
}

.textnav-link--lr-frame:hover .textnav-frame-line--t,
.textnav-link--lr-frame:hover .textnav-frame-line--b {
  left: 0;
  width: 100%;
  transform: none;
  transition: width 0.22s ease 0.2s, left 0.22s ease 0.2s, transform 0.22s ease 0.2s;
}

.textnav-link--lr-frame:not(:hover) .textnav-frame-line {
  transition: none;
}

/* アニメ完了後は均一な inset 枠へ（サムネ・全画面共通） */
@keyframes textnav-frame-solid {
  to {
    box-shadow: inset 0 0 0 var(--textnav-frame-stroke) var(--accent);
  }
}

@keyframes textnav-frame-lines-off {
  to {
    opacity: 0;
    visibility: hidden;
  }
}

.textnav-link--line-frame:hover .textnav-frame {
  animation: textnav-frame-solid 0.001s step-end var(--textnav-frame-solid-line) forwards;
}

.textnav-link--line-frame:hover .textnav-frame-line {
  animation: textnav-frame-lines-off 0.001s step-end var(--textnav-frame-solid-line) forwards;
}

.textnav-link--lr-frame:hover .textnav-frame {
  animation: textnav-frame-solid 0.001s step-end var(--textnav-frame-solid-lr) forwards;
}

.textnav-link--lr-frame:hover .textnav-frame-line {
  animation: textnav-frame-lines-off 0.001s step-end var(--textnav-frame-solid-lr) forwards;
}

.textnav-link--line-frame:not(:hover) .textnav-frame,
.textnav-link--lr-frame:not(:hover) .textnav-frame {
  animation: none;
  box-shadow: none;
}

.textnav-link--line-frame:not(:hover) .textnav-frame-line,
.textnav-link--lr-frame:not(:hover) .textnav-frame-line {
  animation: none;
  opacity: 1;
  visibility: visible;
}

.textnav-fs-open {
  width: 100%;
  justify-content: center;
}

/* ----- 全画面：画面遷移（Ch.4-2） ----- */
.transition-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity calc(0.35s / var(--local-speed, 1)) ease, visibility calc(0.35s / var(--local-speed, 1)), background 0.35s ease, color 0.35s ease;
  padding: 1rem;
  overflow-y: auto;
}

.transition-fs-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.transition-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 0 1rem;
  flex: 0 0 auto;
}

.transition-fs-mode-label {
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.transition-fs-preview {
  width: 100%;
  max-width: 720px;
  height: min(72vh, 520px);
  max-height: 520px;
  margin: 0 auto;
}

.transition-fs-replay {
  display: block;
  width: 100%;
  max-width: 280px;
  margin: 0.65rem auto 0;
  justify-content: center;
}

.transition-fs-main {
  display: flex;
  flex-direction: column;
  flex: 0 0 auto;
  min-width: 0;
  align-items: center;
}

.transition-fs-controls {
  flex-shrink: 0;
  width: 100%;
  margin-top: 16px;
  padding: 0.85rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .transition-fs-controls {
    display: grid;
    grid-template-columns: minmax(120px, auto) 1fr 1fr;
    grid-template-rows: auto auto;
    align-items: end;
    gap: 0.5rem 1.25rem;
  }

  .transition-fs-controls-title {
    grid-column: 1;
    grid-row: 1 / 3;
    align-self: center;
    padding-right: 0.5rem;
  }

  .transition-fs-control-item:first-of-type {
    grid-column: 2;
    grid-row: 1;
  }

  .transition-fs-control-item:last-of-type {
    grid-column: 3;
    grid-row: 1;
  }

  .transition-fs-controls-hint {
    grid-column: 2 / 4;
    grid-row: 2;
  }
}

.transition-fs-controls-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
}

.transition-fs-control-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.transition-fs-control-label {
  font-size: 0.8125rem;
  color: var(--text);
}

.transition-fs-control-label small {
  display: block;
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 400;
}

.transition-fs-control-item input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.transition-fs-intensity-val,
.transition-fs-speed-val {
  font-size: 0.75rem;
  color: var(--accent);
}

.transition-fs-controls-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0;
}

/* ----- 全画面：テキストナビ（Ch.5-3） ----- */
.textnav-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s, background 0.35s ease, color 0.35s ease;
  padding: 1.5rem;
}

.textnav-fs-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.textnav-fs-layout {
  width: 100%;
  max-width: min(960px, 96vw);
  text-align: center;
}

.textnav-fs-mode-label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2rem;
}

.textnav-fs-list {
  list-style: none;
  margin: 0;
  padding: clamp(1.5rem, 4vw, 2.5rem) clamp(1rem, 3vw, 2rem);
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.25rem, 4vw, 2.5rem);
  justify-content: center;
  align-items: center;
  background: var(--gnav-inset, var(--bg-stage));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius-lg);
  box-shadow: var(--gnav-shadow, 0 1px 3px rgba(0, 0, 0, 0.06));
}

.textnav-fs-list li {
  display: flex;
  align-items: center;
  justify-content: center;
}

.textnav-fs-list .textnav-link {
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  padding: 0.35rem 0.75rem;
  cursor: default;
}

.textnav-fs-list .textnav-link--center-out-mid {
  padding: 0.65rem 1rem;
}

.textnav-fs-list .textnav-dot {
  width: 0.55em;
  height: 0.55em;
  margin-right: 0.45em;
}

.textnav-fs-list .textnav-link--swap {
  --textnav-swap-bleed: 0.18em;
  min-width: 5.5em;
  text-align: center;
}

.textnav-fs-list .textnav-link--swap .textnav-swap {
  align-items: center;
}

.textnav-fs-list .textnav-link--swap .textnav-swap span {
  text-align: center;
  width: 100%;
}

.textnav-fs-list .textnav-frame {
  inset: -0.15em -0.35em;
}

.textnav-fs-hint {
  margin-top: 2.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ----- Ch.6 スライドショー ----- */
.slideshow-stage {
  padding: 0.15rem 0;
}

.slideshow-patterns {
  --ss-thumb-unit: 4rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.85rem;
}

.slideshow-pattern {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 0.55rem;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 280px;
}

.slideshow-pattern-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.4;
  min-height: 2.8em;
}

.slideshow-fs-open {
  width: 100%;
  justify-content: center;
}

/* パターンサムネイル（カード内）— 色付き四角は同じ基準サイズ（中央強調は scale で中央だけ大きく） */
.slideshow-patterns .slideshow-thumb-card,
.slideshow-patterns .slideshow-thumb-center-item {
  width: var(--ss-thumb-unit);
  height: var(--ss-thumb-unit);
  min-width: var(--ss-thumb-unit);
  min-height: var(--ss-thumb-unit);
  max-width: var(--ss-thumb-unit);
  max-height: var(--ss-thumb-unit);
  flex: 0 0 var(--ss-thumb-unit);
  box-sizing: border-box;
}

.slideshow-thumb {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-height: 132px;
  flex: 1;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-stage);
  position: relative;
  overflow: hidden;
  padding: 0.45rem;
}

.slideshow-thumb-stage {
  position: relative;
  flex: 1;
  min-height: calc(var(--ss-thumb-unit) + 1rem);
  border-radius: 6px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.25);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem;
}

.slideshow-thumb-card {
  display: grid;
  place-items: center;
  background: var(--ss-color, #6366f1);
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  aspect-ratio: 1;
}

.slideshow-thumb-note {
  font-size: 0.625rem;
  color: var(--text-muted);
  line-height: 1.3;
  flex-shrink: 0;
}

.slideshow-thumb-track {
  display: flex;
  height: 100%;
  width: 100%;
}

.slideshow-thumb-track--slide,
.slideshow-thumb-track--video {
  gap: 0;
}

.slideshow-thumb-stage--slide,
.slideshow-thumb-stage--video {
  overflow: hidden;
}

.slideshow-thumb-single-wrap {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.slideshow-thumb-single-track {
  display: flex;
  height: 100%;
  transition: transform calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.slideshow-thumb-single-slide {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.slideshow-thumb-single-track .slideshow-thumb-card {
  align-self: center;
  border-radius: 4px;
}

.slideshow-thumb-single-track .slideshow-thumb-card--video {
  background: linear-gradient(135deg, #1e1b4b, #4338ca);
  gap: 0.15rem;
  font-size: 0.6875rem;
}

.slideshow-thumb-single-track .slideshow-thumb-card--video i {
  font-style: normal;
  font-size: 0.875rem;
}

/* フェード・ズームサムネ（全画面 single と同じ切替） */
.slideshow-thumb-stack-viewport {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.slideshow-thumb-stack-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.slideshow-thumb-stack-slide {
  position: absolute;
  left: 50%;
  top: 50%;
  margin: 0;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: opacity calc(0.6s / var(--local-speed, 1)) ease;
}

.slideshow-thumb-stack-viewport[data-transition="fade"] .slideshow-thumb-stack-slide {
  transition: opacity calc(0.6s / var(--local-speed, 1)) ease;
}

.slideshow-thumb-stack-viewport[data-transition="zoom"] .slideshow-thumb-stack-slide {
  transition:
    opacity calc(0.55s / var(--local-speed, 1)) ease,
    transform calc(0.55s / var(--local-speed, 1)) ease;
}

.slideshow-thumb-stack-viewport[data-transition="zoom"] .slideshow-thumb-stack-slide:not(.is-active) {
  transform: translate(-50%, -50%) scale(calc(1.3 + 0.25 * var(--local-intensity, 1)));
}

.slideshow-thumb-stack-viewport[data-transition="zoom"] .slideshow-thumb-stack-slide.is-active {
  opacity: 1;
  z-index: 2;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

.slideshow-thumb-stack-viewport[data-transition="fade"] .slideshow-thumb-stack-slide.is-active {
  opacity: 1;
  z-index: 2;
  pointer-events: auto;
  transform: translate(-50%, -50%);
}

.slideshow-thumb--zoom .slideshow-thumb-stage {
  padding: 0.35rem;
}

/* combo：全画面 slick centerMode 相当（3枚・中央強調・自動スライド） */
.slideshow-thumb-stage--combo {
  padding: 0.35rem 0.5rem;
}

.slideshow-thumb-combo-wrap {
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.slideshow-thumb-combo-track {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  width: max-content;
  transition: transform calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.slideshow-thumb-combo-track .slideshow-thumb-card {
  opacity: 0.55;
  outline: 2px solid transparent;
  outline-offset: -2px;
  transition:
    opacity calc(0.35s / var(--local-speed, 1)) ease,
    outline-color calc(0.35s / var(--local-speed, 1)) ease;
}

.slideshow-thumb-combo-track .slideshow-thumb-card.is-combo-active {
  opacity: 1;
  outline-color: var(--accent);
  z-index: 1;
}

.slideshow-thumb-card--video i {
  font-style: normal;
  font-size: 0.875rem;
}

.slideshow-thumb-stage--parallel {
  gap: 0.25rem;
  justify-content: center;
}

.slideshow-thumb-stage--parallel .slideshow-thumb-card {
  font-size: 0.6875rem;
  opacity: 0.55;
  outline: 2px solid transparent;
  outline-offset: -2px;
  transition:
    opacity calc(0.35s / var(--local-speed, 1)) ease,
    outline-color calc(0.35s / var(--local-speed, 1)) ease;
}

.slideshow-thumb-stage--parallel .slideshow-thumb-card.is-active {
  opacity: 1;
  outline-color: var(--accent);
}

.slideshow-thumb-stage--center {
  --ss-thumb-center-lane: var(--ss-thumb-unit);
  --ss-center-idle-scale: 0.45;
  padding: 0.35rem 0.5rem;
}

.slideshow-thumb-center-wrap {
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.slideshow-thumb-center-track {
  display: flex;
  align-items: center;
  gap: 0.12rem;
  width: max-content;
  transition: transform calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.slideshow-thumb-center-item {
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  transform: scale(var(--ss-center-idle-scale, 0.45));
  transform-origin: center center;
  opacity: 0.35;
  pointer-events: none;
  transition:
    transform calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1),
    opacity calc(0.35s / var(--local-speed, 1)) ease,
    border-color calc(0.35s / var(--local-speed, 1)) ease;
}

.slideshow-thumb-center-item.is-near {
  opacity: 0.65;
  pointer-events: auto;
}

.slideshow-thumb-center-item.is-active {
  transform: scale(1);
  opacity: 1;
  border-color: color-mix(in srgb, var(--accent) 65%, transparent);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  z-index: 1;
}

.slideshow-thumb-center-visual {
  width: 100%;
  height: 100%;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  background: var(--ss-color, #6366f1);
  color: #fff;
  font-weight: 700;
  font-size: 0.5625rem;
}

.slideshow-thumb-center-item.is-active .slideshow-thumb-center-visual {
  font-size: 0.8125rem;
}

.slideshow-thumb-stage--flow {
  display: flex;
  align-items: center;
}

.slideshow-thumb-track--flow {
  gap: 0.3rem;
  width: max-content;
  padding: 0 0.35rem;
  animation: ssThumbFlow calc(14s / var(--local-speed, 1)) linear infinite;
  align-items: center;
}

.slideshow-thumb-card.is-mini {
  font-size: 0.6875rem;
}

.slideshow-thumb-contrast {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
  flex: 1;
  min-height: calc(var(--ss-thumb-unit) + 0.5rem);
}

.slideshow-thumb-contrast-col {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.slideshow-thumb-contrast-tag {
  font-size: 0.5625rem;
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
}

.slideshow-thumb-contrast-stage {
  position: relative;
  flex: 1;
  min-height: var(--ss-thumb-unit);
  border-radius: 4px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.25);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slideshow-thumb-track--contrast-slide {
  display: flex;
  width: max-content;
  align-items: center;
  height: 100%;
  will-change: transform;
}

.slideshow-thumb-track--contrast-slide .slideshow-thumb-card {
  position: relative;
  left: auto;
  top: auto;
  margin: 0;
  transform: none;
  border-radius: 4px;
  flex-shrink: 0;
  opacity: 1;
}

.slideshow-thumb-contrast-col:last-child .slideshow-thumb-contrast-stage .slideshow-thumb-card {
  position: absolute;
  left: 50%;
  top: 50%;
  margin: 0;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity calc(0.45s / var(--local-speed, 1)) ease;
}

.slideshow-thumb-contrast-col:last-child .slideshow-thumb-contrast-stage .slideshow-thumb-card.is-active {
  opacity: 1;
  z-index: 2;
}

@keyframes ssThumbFlow {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.ss-slide {
  flex: 0 0 100%;
  min-width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--ss-color, #6366f1);
  color: #fff;
  text-align: center;
}

.ss-slide span {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
}

.ss-slide p {
  margin-top: 0.35rem;
  font-size: 0.6875rem;
  opacity: 0.88;
}

.ss-slide.is-video {
  background: linear-gradient(135deg, #1e1b4b, #312e81);
}

.ss-slide.is-video .ss-video-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.85);
  display: grid;
  place-items: center;
  font-size: 0.875rem;
  margin-bottom: 0.35rem;
}

/* 全画面オーバーレイ */
.slideshow-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 240;
  background: var(--bg);
  display: flex;
  align-items: stretch;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity calc(0.35s / var(--local-speed, 1)) ease, visibility calc(0.35s / var(--local-speed, 1)), background 0.35s ease, color 0.35s ease;
  padding: 1rem;
}

.slideshow-fs-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.slideshow-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 0 0.25rem;
  min-height: 0;
  flex: 1;
}

.slideshow-fs-main {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  min-height: 0;
}

.slideshow-fs-mode-label {
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.slideshow-fs-shell {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  transform: none;
  opacity: 1;
}

.slideshow-fs-viewport {
  flex: 1;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-stage);
  min-height: min(52vh, 480px);
}

.slideshow-fs-viewport[data-layout="single"][data-transition="slide"] .slideshow-fs-track {
  display: flex;
  height: 100%;
  min-height: min(52vh, 480px);
  transition: transform calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1);
}

.slideshow-fs-viewport[data-layout="single"][data-transition="fade"] .slideshow-fs-track,
.slideshow-fs-viewport[data-layout="single"][data-transition="zoom"] .slideshow-fs-track,
.slideshow-fs-viewport[data-layout="single"][data-transition="combo"] .slideshow-fs-track {
  position: relative;
  height: 100%;
  min-height: min(52vh, 480px);
}

.slideshow-fs-viewport[data-layout="single"][data-transition="fade"] .slideshow-fs-slide,
.slideshow-fs-viewport[data-layout="single"][data-transition="zoom"] .slideshow-fs-slide,
.slideshow-fs-viewport[data-layout="single"][data-transition="combo"] .slideshow-fs-slide {
  position: absolute;
  inset: 0;
  min-width: 0;
  opacity: 0;
  pointer-events: none;
}

.slideshow-fs-viewport[data-layout="single"][data-transition="fade"] .slideshow-fs-slide {
  transition: opacity calc(0.6s / var(--local-speed, 1)) ease;
}

.slideshow-fs-viewport[data-layout="single"][data-transition="fade"] .slideshow-fs-slide.is-active {
  opacity: 1;
  pointer-events: auto;
}

.slideshow-fs-viewport[data-layout="single"][data-transition="zoom"] .slideshow-fs-slide {
  transform-origin: center center;
  transform: scale(calc(1.3 + 0.25 * var(--local-intensity, 1)));
  transition:
    opacity calc(0.55s / var(--local-speed, 1)) ease,
    transform calc(0.55s / var(--local-speed, 1)) ease;
}

.slideshow-fs-viewport[data-layout="single"][data-transition="zoom"] .slideshow-fs-slide.is-entering {
  opacity: 1;
  pointer-events: auto;
  z-index: 2;
  transform: scale(calc(1.3 + 0.25 * var(--local-intensity, 1)));
}

.slideshow-fs-viewport[data-layout="single"][data-transition="zoom"] .slideshow-fs-slide.is-active {
  opacity: 1;
  pointer-events: auto;
  z-index: 2;
  transform: scale(1);
}

.slideshow-fs-viewport[data-layout="single"][data-transition="zoom"] .slideshow-fs-slide.is-leaving {
  opacity: 0;
  pointer-events: none;
  z-index: 1;
  transform: scale(1);
}

.slideshow-fs-viewport[data-layout="single"][data-transition="combo"] .slideshow-fs-slide {
  transform: translateX(calc(48px * var(--local-intensity, 1))) scale(calc(1.1 + 0.05 * var(--local-intensity, 1)));
  transition:
    opacity calc(0.5s / var(--local-speed, 1)) ease,
    transform calc(0.6s / var(--local-speed, 1)) ease;
}

.slideshow-fs-viewport[data-layout="single"][data-transition="combo"] .slideshow-fs-slide.is-active {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.slideshow-fs-slide {
  flex: 0 0 100%;
  min-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--ss-color, #6366f1);
  color: #fff;
}

.slideshow-fs-slide span {
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
}

.slideshow-fs-slide p {
  margin-top: 0.5rem;
  font-size: 0.9375rem;
  opacity: 0.9;
}

.slideshow-fs-slide.is-video {
  background: linear-gradient(145deg, #1e1b4b, #4338ca);
}

.slideshow-fs-slide.is-video .ss-video-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.9);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  animation: ssVideoPulse calc(1.6s / var(--local-speed, 1)) ease-in-out infinite;
}

@keyframes ssVideoPulse {
  0%, 100% { transform: scale(1); opacity: 0.85; }
  50% { transform: scale(1.06); opacity: 1; }
}

/* 全画面：並列 */
.slideshow-fs-viewport[data-layout="parallel"] {
  display: flex;
  align-items: stretch;
  padding: 1rem;
}

.slideshow-fs-parallel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  width: 100%;
  align-self: center;
}

.slideshow-fs-parallel-item {
  border-radius: 10px;
  overflow: hidden;
  border: 2px solid transparent;
  transition:
    border-color calc(0.35s / var(--local-speed, 1)) ease,
    transform calc(0.35s / var(--local-speed, 1)) ease,
    opacity calc(0.35s / var(--local-speed, 1)) ease;
  opacity: 0.5;
  transform: scale(0.92);
}

.slideshow-fs-parallel-item.is-active {
  border-color: var(--accent);
  opacity: 1;
  transform: scale(1);
}

.slideshow-fs-parallel-visual {
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  background: var(--ss-color, #6366f1);
  color: #fff;
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 700;
}

.slideshow-fs-parallel-label {
  padding: 0.4rem;
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.75);
  background: rgba(0, 0, 0, 0.35);
}

/* 全画面：中央強調（回転カルーセル・中央だけ大） */
.slideshow-fs-viewport[data-layout="center"] {
  --ss-center-main: clamp(200px, 44vw, 340px);
  --ss-center-side: clamp(72px, 11vw, 96px);
  --ss-center-gap: clamp(0.65rem, 1.4vw, 1rem);
  --ss-center-lane: var(--ss-center-main);
  --ss-center-idle-scale: 0.28;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem clamp(0.75rem, 2vw, 1.25rem);
  min-height: min(52vh, 480px);
}

.slideshow-fs-center-wrap {
  width: 100%;
  overflow: hidden;
}

.slideshow-fs-center-track {
  display: flex;
  align-items: center;
  gap: var(--ss-center-gap);
  width: max-content;
  transition: transform calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.slideshow-fs-center-item {
  flex: 0 0 var(--ss-center-lane);
  width: var(--ss-center-lane);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  transform: scale(var(--ss-center-idle-scale));
  transform-origin: center center;
  transition:
    transform calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1),
    opacity calc(0.35s / var(--local-speed, 1)) ease,
    border-color calc(0.35s / var(--local-speed, 1)) ease,
    box-shadow calc(0.35s / var(--local-speed, 1)) ease;
  opacity: 0;
  pointer-events: none;
}

.slideshow-fs-center-item.is-near {
  opacity: 0.9;
  pointer-events: auto;
}

.slideshow-fs-center-item.is-active {
  transform: scale(1);
  opacity: 1;
  border-color: color-mix(in srgb, var(--accent) 65%, transparent);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  z-index: 1;
}

.slideshow-fs-center-visual {
  aspect-ratio: 16 / 10;
  display: grid;
  place-items: center;
  background: var(--ss-color, #6366f1);
  color: #fff;
  font-weight: 700;
  font-size: clamp(0.6875rem, 1.8vw, 0.875rem);
}

.slideshow-fs-center-item.is-active .slideshow-fs-center-visual {
  font-size: clamp(1.25rem, 4vw, 2.5rem);
}

.slideshow-fs-center-label {
  padding: 0.25rem;
  font-size: 0.5625rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  background: rgba(0, 0, 0, 0.35);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.slideshow-fs-center-item.is-active .slideshow-fs-center-label {
  padding: 0.35rem;
  font-size: 0.75rem;
}

/* 全画面：流れる */
.slideshow-fs-viewport[data-layout="flow"] {
  display: flex;
  align-items: center;
}

.slideshow-fs-flow {
  width: 100%;
  overflow: hidden;
}

.slideshow-fs-flow-track {
  display: flex;
  gap: 0.75rem;
  width: max-content;
  padding: 0.75rem;
  animation: slideshowFlow calc(14s / var(--local-speed, 1)) linear infinite;
}

.slideshow-fs-flow-item {
  flex: 0 0 clamp(100px, 14vw, 160px);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.slideshow-fs-flow-visual {
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  background: var(--ss-color, #6366f1);
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
}

@keyframes slideshowFlow {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* 全画面：対比 */
.slideshow-fs-viewport[data-layout="contrast"] {
  padding: 0.75rem;
}

.slideshow-fs-contrast {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  height: 100%;
  min-height: min(52vh, 480px);
}

.slideshow-fs-contrast-panel {
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.35);
  min-height: 0;
  height: 100%;
}

.slideshow-fs-contrast-label {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
  padding: 0.5rem 0.65rem 0;
  flex-shrink: 0;
}

.slideshow-fs-contrast-viewport {
  position: relative;
  flex: 1;
  overflow: hidden;
  margin: 0.5rem;
  border-radius: 8px;
  min-height: min(36vh, 280px);
  background: #000;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.slideshow-fs-contrast-track {
  display: flex;
  height: 100%;
  width: 100%;
  transition: transform calc(0.45s / var(--local-speed, 1)) ease;
}

.slideshow-fs-contrast-track:not(.is-fade) .slideshow-fs-slide {
  flex: 0 0 100%;
  width: 100%;
  min-width: 100%;
  height: 100%;
}

.slideshow-fs-contrast-track.is-fade {
  display: block;
  position: relative;
  height: 100%;
  width: 100%;
}

.slideshow-fs-contrast-track.is-fade .slideshow-fs-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  min-width: 0;
  opacity: 0;
  transition: opacity calc(0.45s / var(--local-speed, 1)) ease;
}

.slideshow-fs-contrast-track.is-fade .slideshow-fs-slide.is-active {
  opacity: 1;
  z-index: 1;
}

.slideshow-fs-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: var(--carousel-btn-bg);
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 2;
}

.slideshow-fs-nav.prev { left: 8px; }
.slideshow-fs-nav.next { right: 8px; }

.slideshow-fs-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 0.85rem;
}

.slideshow-fs-dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--surface-3);
  cursor: pointer;
  transition: transform calc(0.2s / var(--local-speed, 1)), background calc(0.2s / var(--local-speed, 1));
}

.slideshow-fs-dot.is-active {
  background: var(--accent);
  transform: scale(1.2);
}

.slideshow-fs-caption {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8125rem;
  margin-top: 0.5rem;
}

/* 書籍 6-1-7.js：combo-fs 全画面 slick（centerMode + variableWidth） */
.slideshow-fs-viewport[data-layout="combo-slick"] {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0;
  min-height: min(52vh, 480px);
}

.slideshow-fs-viewport[data-layout="combo-slick"] .ss-combo-slick {
  width: 100%;
  max-width: 100%;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-list {
  overflow: hidden;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-track {
  display: flex;
  align-items: center;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-slide {
  float: none;
  height: auto;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-slide > div {
  padding: 0 0.35rem;
  height: 100%;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slideshow-fs-slide.ss-combo-slick-slide {
  flex: none;
  min-width: 0;
  height: min(28vh, 220px);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-sizing: border-box;
  transition:
    transform calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1),
    opacity calc(0.35s / var(--local-speed, 1)) ease;
  opacity: 0.55;
  transform: scale(0.92);
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-center .ss-combo-slick-slide {
  opacity: 1;
  transform: scale(1);
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.35);
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-prev,
.slideshow-fs-viewport[data-layout="combo-slick"] .slick-next {
  z-index: 3;
  width: 44px;
  height: 44px;
  top: calc(50% - 0.75rem);
  transform: translateY(-50%);
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-prev {
  left: 0.25rem;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-next {
  right: 0.25rem;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-prev::before,
.slideshow-fs-viewport[data-layout="combo-slick"] .slick-next::before {
  font-size: 28px;
  opacity: 0.85;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-dots {
  position: relative;
  bottom: auto;
  margin-top: 0.85rem;
  line-height: 1;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-dots li button:before {
  color: var(--text-muted);
  opacity: 0.45;
}

.slideshow-fs-viewport[data-layout="combo-slick"] .slick-dots li.slick-active button:before {
  color: var(--accent);
  opacity: 1;
}

/* 全画面コントロール（下部配置） */
.slideshow-fs-controls {
  flex-shrink: 0;
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .slideshow-fs-controls {
    display: grid;
    grid-template-columns: minmax(120px, auto) 1fr 1fr;
    grid-template-rows: auto auto;
    align-items: end;
    gap: 0.5rem 1.25rem;
  }

  .slideshow-fs-controls-title {
    grid-column: 1;
    grid-row: 1 / 3;
    align-self: center;
    padding-right: 0.5rem;
  }

  .slideshow-fs-control-item:first-of-type {
    grid-column: 2;
    grid-row: 1;
  }

  .slideshow-fs-control-item:last-of-type {
    grid-column: 3;
    grid-row: 1;
  }

  .slideshow-fs-controls-hint {
    grid-column: 2 / 4;
    grid-row: 2;
  }
}

.slideshow-fs-controls-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
}

.slideshow-fs-control-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.slideshow-fs-control-label {
  font-size: 0.8125rem;
  color: var(--text);
}

.slideshow-fs-control-label small {
  display: block;
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 400;
}

.slideshow-fs-control-item input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.slideshow-fs-intensity-val,
.slideshow-fs-speed-val {
  font-size: 0.75rem;
  color: var(--accent);
}

.slideshow-fs-controls-hint {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.slideshow-fs-overlay.is-entering[data-mode="slide-fs"] .slideshow-fs-shell,
.slideshow-fs-overlay.is-entering[data-mode="parallel"] .slideshow-fs-shell {
  animation: ssFsEnterSlide calc(0.65s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* 中央強調：フェード/スライドインなし（そのまま表示） */
.slideshow-fs-overlay.is-entering[data-mode="center"] .slideshow-fs-shell {
  animation: none;
}

.slideshow-fs-overlay.is-entering[data-mode="fade-fs"] .slideshow-fs-shell,
.slideshow-fs-overlay.is-entering[data-mode="video-fs"] .slideshow-fs-shell,
.slideshow-fs-overlay.is-entering[data-mode="flow"] .slideshow-fs-shell,
.slideshow-fs-overlay.is-entering[data-mode="contrast"] .slideshow-fs-shell {
  animation: ssFsEnterFade calc(0.6s / var(--local-speed, 1)) ease forwards;
}

.slideshow-fs-overlay.is-entering[data-mode="zoom-fs"] .slideshow-fs-shell {
  animation: ssFsEnterZoom calc(0.65s / var(--local-speed, 1)) ease forwards;
}

.slideshow-fs-overlay.is-entering[data-mode="combo-fs"] .slideshow-fs-shell {
  animation: ssFsEnterCombo calc(0.7s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes ssFsEnterSlide {
  from { transform: translateX(calc(100% * var(--local-intensity, 1))); opacity: 0.6; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes ssFsEnterFade {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes ssFsEnterZoom {
  from { transform: scale(calc(1.35 + 0.2 * var(--local-intensity, 1))); opacity: 0.4; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes ssFsEnterCombo {
  from {
    transform: translateX(calc(30px * var(--local-intensity, 1))) scale(1.12);
    opacity: 0;
  }
  to { transform: translateX(0) scale(1); opacity: 1; }
}

@media (max-width: 900px) {
  .slideshow-fs-layout {
    padding-top: 3.5rem;
  }

  .slideshow-fs-parallel {
    grid-template-columns: repeat(2, 1fr);
  }

  .slideshow-fs-contrast {
    grid-template-columns: 1fr;
    min-height: 360px;
  }
}

@media (max-width: 640px) {
  .slideshow-fs-nav.prev { left: 4px; }
  .slideshow-fs-nav.next { right: 4px; }
}

/* ----- Ch.6 ギャラリー ----- */
.gallery-stage {
  padding: 0.15rem 0;
}

.gallery-patterns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.85rem;
  align-items: stretch;
}

.gallery-pattern {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 300px;
  min-width: 0;
  overflow: hidden;
  box-sizing: border-box;
}

.gallery-pattern-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.4;
  min-height: auto;
  margin: 0;
}

.gallery-pattern-toolbar {
  position: relative;
  z-index: 4;
  isolation: isolate;
  min-height: 2.35rem;
  display: flex;
  align-items: flex-end;
  pointer-events: auto;
}

.gallery-pattern-toolbar .gallery-filter-bar,
.gallery-pattern-toolbar .gallery-search-bar {
  width: 100%;
}

.gallery-pattern-note {
  display: none;
}

.gallery-fs-open {
  width: 100%;
  max-width: 100%;
  justify-content: center;
  box-sizing: border-box;
  flex-shrink: 0;
  margin-top: auto;
}

.gallery-pattern > .gallery-demo {
  flex: 1 1 auto;
  min-height: 0;
}

.gallery-demo {
  position: relative;
  z-index: 1;
  min-height: 0;
  min-width: 0;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
}

.gallery-demo--grid,
.gallery-demo--filter,
.gallery-demo--search,
.gallery-demo--groups {
  overflow: hidden;
}

/* カード内：メイン切替1・2でメイン画像・サムネの高さを揃える */
.gallery-pattern {
  --gallery-main-thumb-h: 2.65rem;
  --gallery-card-main-h: 11.7rem;
  --gallery-card-thumb-row-h: calc(var(--gallery-main-thumb-h) + 0.75rem);
}

.gallery-pattern .gallery-demo--main .gallery-main,
.gallery-pattern .gallery-demo--main-slide .gallery-sync {
  gap: 0.45rem;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
}

.gallery-pattern .gallery-demo--main .gallery-main-visual,
.gallery-pattern .gallery-demo--main-slide .gallery-main-visual {
  aspect-ratio: unset;
  width: 100%;
  height: var(--gallery-card-main-h);
  min-height: var(--gallery-card-main-h);
  flex-shrink: 0;
}

.gallery-pattern .gallery-demo--main .gallery-main-thumb,
.gallery-pattern .gallery-demo--main-slide .gallery-sync-thumb {
  width: var(--gallery-main-thumb-h);
  height: var(--gallery-main-thumb-h);
  flex: 0 0 var(--gallery-main-thumb-h);
  max-width: var(--gallery-main-thumb-h);
}

.gallery-pattern .gallery-demo--main .gallery-main-thumb-visual,
.gallery-pattern .gallery-demo--main-slide .gallery-sync-thumb-visual {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: unset;
}

.gallery-pattern .gallery-demo--main .gallery-main-thumbs--static {
  display: grid;
  grid-template-columns: repeat(6, var(--gallery-main-thumb-h));
  gap: 0.35rem;
  justify-content: start;
  align-items: end;
  min-height: var(--gallery-card-thumb-row-h);
  padding: 0 0 0.5rem;
  box-sizing: border-box;
}

.gallery-pattern > .gallery-demo--main,
.gallery-pattern > .gallery-demo--main-slide {
  min-height: auto;
}

/* 6-2-4 カード「サムネをクリックするとメイン画像に切り替わる1」(#galleryMain1) */
#ch6-gallery #galleryMain1 {
  overflow: visible;
  min-height: auto;
}

#ch6-gallery #galleryMain1 .gallery-main-thumbs--static {
  overflow: visible;
}

#ch6-gallery #galleryMain1 .gallery-main-thumb {
  overflow: visible;
}

#ch6-gallery #galleryMain1 .gallery-main-thumb.is-active {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

#ch6-gallery #galleryMain1 .gallery-main-thumb.is-active .gallery-main-thumb-visual {
  border-color: var(--accent);
}

.gallery-pattern .gallery-sync-arrow {
  width: 1.4rem;
  height: 1.4rem;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.gallery-pattern .gallery-sync-arrow--main {
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.95rem;
}

.gallery-pattern .gallery-demo--main-slide .gallery-sync-main,
.gallery-pattern .gallery-demo--main-slide .gallery-sync-thumbs {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  min-width: 0;
  max-width: 100%;
}

.gallery-pattern .gallery-demo--main-slide .gallery-sync-main-viewport,
.gallery-pattern .gallery-demo--main-slide .gallery-sync-thumbs-viewport {
  flex: 1 1 auto;
  min-width: 0;
  width: auto;
}

.gallery-pattern .gallery-demo--main-slide .gallery-sync-arrow--main,
.gallery-pattern .gallery-demo--main-slide .gallery-sync-arrow--thumb {
  flex-shrink: 0;
  margin: 0;
  align-self: center;
}

.gallery-pattern .gallery-demo--main-slide .gallery-sync-thumbs {
  min-height: var(--gallery-card-thumb-row-h);
}

.gallery-pattern .gallery-demo--main-slide .gallery-sync-thumbs-viewport {
  padding: 4px 0;
  overflow: hidden;
}

.gallery-pattern .gallery-demo--main-slide .gallery-sync-thumbs-track {
  gap: 0.35rem;
}

.gallery-pattern .gallery-demo--main-slide .gallery-sync-thumb.is-active {
  outline: none;
}

.gallery-pattern .gallery-demo--main-slide .gallery-sync-thumb.is-active .gallery-sync-thumb-visual {
  border-color: var(--accent);
  border-width: 2px;
  box-shadow: none;
}

.gallery-pattern .gallery-demo--main-slide .gallery-main-title {
  padding: 0.35rem 0.25rem;
  font-size: 0.6875rem;
}

/* 6-2-5 カード「メイン画像切替2」(#galleryMain2) */
#ch6-gallery #galleryMain2 {
  overflow: hidden;
}

#ch6-gallery #galleryMain2 .gallery-sync-thumb {
  overflow: hidden;
}

/* 6-2-1 複数画像一覧（書籍 .gallery 段組み） */
.gallery {
  columns: 4;
  padding: 0 15px;
  margin: 0;
  list-style: none;
}

.gallery > li {
  margin-bottom: 20px;
  list-style: none;
  break-inside: avoid;
}

.gallery > li[hidden] {
  display: none;
}

/* サムネ：変更前どおり 3 列グリッド（全画面は下記 .gallery-fs-body で段組み） */
.gallery-pattern .gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
  columns: unset;
  padding: 0;
}

.gallery-pattern .gallery > li {
  margin-bottom: 0;
  break-inside: auto;
}

.gallery-pattern .gallery-tile {
  display: flex;
  flex-direction: column;
}

.gallery-tile {
  display: block;
  width: 100%;
  border: none;
  padding: 0;
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  background: transparent;
  text-align: left;
  transition: transform calc(0.35s / var(--local-speed, 1)) ease;
}

.gallery-tile-visual {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: bottom;
  aspect-ratio: 1;
  transition: transform calc(0.35s / var(--local-speed, 1)) ease;
}

.gallery-tile:hover .gallery-tile-visual,
.gallery-tile:focus-visible .gallery-tile-visual {
  transform: scale(1.06);
}

.gallery-tile-label {
  display: block;
  padding: 0.28rem 0.15rem 0;
  font-size: 0.5625rem;
  color: var(--text-muted);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gallery-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.gallery-filter-btn {
  font-size: 0.6875rem;
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  cursor: pointer;
  transition:
    background calc(0.2s / var(--local-speed, 1)),
    color calc(0.2s / var(--local-speed, 1)),
    border-color calc(0.2s / var(--local-speed, 1));
}

.gallery-filter-btn.is-active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.gallery-search-bar {
  position: relative;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  width: 100%;
  pointer-events: auto;
}

.gallery-search-input,
.gallery-search-select {
  position: relative;
  z-index: 1;
  font-size: 0.6875rem;
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  pointer-events: auto;
}

.gallery-search-field {
  position: relative;
  flex: 1;
  min-width: 7rem;
  display: flex;
  align-items: stretch;
}

.gallery-search-input {
  flex: 1;
  min-width: 0;
  width: 100%;
  padding-right: 1.85rem;
}

.gallery-search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}

.gallery-search-clear {
  position: absolute;
  right: 0.35rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  padding: 0 0.15rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  pointer-events: auto;
}

.gallery-search-clear[hidden] {
  display: none;
}

.gallery-search-clear:hover {
  color: var(--text);
}

.gallery-search-select {
  min-width: 5.5rem;
}

.gallery-main {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.gallery-main-view {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-stage);
  width: 100%;
}

.gallery-main-visual {
  aspect-ratio: 16 / 10;
  width: 100%;
  height: auto;
  transition: opacity calc(0.35s / var(--local-speed, 1)) ease;
}

.gallery-main-visual.is-fading {
  opacity: 0.45;
}

.gallery-main-title {
  padding: 0.45rem 0.5rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text);
}

.gallery-main-thumbs {
  width: 100%;
}

.gallery-main-thumbs--static {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.35rem;
}

.gallery-main-thumbs-wrap {
  overflow: hidden;
  width: 100%;
  padding: 0.15rem 0;
}

.gallery-main-thumbs-track {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  width: max-content;
  transition: transform calc(0.45s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.gallery-main-thumb {
  flex: 0 0 2.35rem;
  width: 2.35rem;
  padding: 0;
  border: none;
  border-radius: 5px;
  overflow: hidden;
  cursor: pointer;
  background: transparent;
  display: block;
  box-sizing: border-box;
}

.gallery-main-thumbs--static .gallery-main-thumb {
  width: 100%;
  flex: unset;
}

.gallery-main-thumb-visual {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 3px;
  box-sizing: border-box;
  border: 2px solid transparent;
  transition: border-color calc(0.2s / var(--local-speed, 1));
}

.gallery-main-thumb.is-active .gallery-main-thumb-visual {
  border-color: var(--accent);
}

/* 6-2-5：メイン fade + サムネ slidesToShow:4（Slick 相当） */
.gallery-sync {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  width: 100%;
  max-width: 100%;
}

.gallery-sync-main,
.gallery-sync-thumbs {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  width: 100%;
  max-width: 100%;
}

.gallery-sync-main-viewport,
.gallery-sync-thumbs-viewport {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.gallery-sync-thumbs-viewport {
  padding: 2px 0;
}

.gallery-sync-main-viewport .gallery-main-view {
  width: 100%;
}

.gallery-sync-thumbs-track {
  display: flex;
  gap: 0.35rem;
  width: max-content;
  padding: 0 2px;
  transition: transform calc(0.45s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.gallery-sync-thumb {
  flex: 0 0 auto;
  padding: 0;
  border: none;
  border-radius: 5px;
  overflow: hidden;
  background: transparent;
  cursor: pointer;
  box-sizing: border-box;
}

.gallery-sync-thumb-visual {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 3px;
  box-sizing: border-box;
  border: 2px solid transparent;
  transition: border-color calc(0.2s / var(--local-speed, 1));
}

.gallery-sync-thumb.is-active .gallery-sync-thumb-visual {
  border-color: var(--accent);
}

.gallery-sync-arrow {
  flex-shrink: 0;
  width: 1.65rem;
  height: 1.65rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--text);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
}

.gallery-sync-arrow:disabled {
  opacity: 0.35;
  cursor: default;
}

.gallery-sync-arrow--main {
  width: 1.85rem;
  height: 1.85rem;
  font-size: 1.15rem;
}

.gallery-group-covers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
}

.gallery-group-cover {
  display: flex;
  flex-direction: column;
  border: none;
  padding: 0;
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  background: transparent;
  text-align: left;
  border: 2px solid transparent;
  transition: border-color calc(0.2s / var(--local-speed, 1));
}

.gallery-group-cover.is-active {
  border-color: var(--accent);
}

.gallery-group-cover-visual {
  aspect-ratio: 4 / 3;
  width: 100%;
}

.gallery-group-cover-label {
  display: block;
  padding: 0.3rem 0.2rem;
  font-size: 0.5625rem;
  color: var(--text-muted);
  text-align: center;
}

/* 6-2-6：.gallery-list → 画像クリックで全画面（Modaal 相当） */
.gallery-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(4.5rem, 1fr));
  gap: 0.45rem;
  margin: 0;
  padding: 0;
}

.gallery-list-item {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  text-align: center;
}

.gallery-list-visual {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
  transition: transform calc(0.25s / var(--local-speed, 1)) ease;
}

.gallery-list-item:hover .gallery-list-visual,
.gallery-list-item:focus-visible .gallery-list-visual {
  transform: scale(1.04);
}

.gallery-list .caption {
  display: block;
  padding: 0.35rem 0.1rem 0;
  font-size: 0.5625rem;
  color: var(--text-muted);
  line-height: 1.2;
}

.gallery-group-panel {
  margin-top: 0.55rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--border);
}

.gallery-group-panel[hidden] {
  display: none;
}

.gallery-group-panel-title {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.45rem;
}

.gallery-empty {
  text-align: center;
  font-size: 0.6875rem;
  color: var(--text-muted);
  padding: 1.5rem 0.5rem;
  margin: 0;
}

/* 6-2-6 Modaal 全画面 lightbox */
.gallery-modaal-overlay {
  position: fixed;
  inset: 0;
  z-index: 245;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.92);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s;
  padding: 1.5rem;
}

.gallery-modaal-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.gallery-modaal-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.gallery-modaal-nav.prev { left: 1rem; }
.gallery-modaal-nav.next { right: 1rem; }

.gallery-modaal-nav:disabled {
  opacity: 0.25;
  cursor: default;
}

.gallery-modaal-shell {
  width: min(92vw, 42rem);
  max-height: calc(100vh - 3rem);
}

.gallery-modaal-visual {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 8px;
  transition: opacity calc(0.35s / var(--local-speed, 1)) ease;
}

.gallery-modaal-visual.is-fading {
  opacity: 0.45;
}

.gallery-modaal-overlay .caption {
  display: block;
  padding: 10px 0;
  text-align: center;
  color: #fff;
  font-size: 0.875rem;
}

.gallery-fs-body .gallery-list {
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.75rem;
}

.gallery-fs-body .gallery-list .caption {
  font-size: 0.75rem;
}

.g1 { background: linear-gradient(135deg, #6366f1, #8b5cf6); }
.g2 { background: linear-gradient(135deg, #ec4899, #f43f5e); }
.g3 { background: linear-gradient(135deg, #14b8a6, #06b6d4); }
.g4 { background: linear-gradient(135deg, #f59e0b, #eab308); }
.g5 { background: linear-gradient(135deg, #818cf8, #c084fc); }
.g6 { background: linear-gradient(135deg, #2dd4bf, #38bdf8); }
.g7 { background: linear-gradient(135deg, #f472b6, #fb7185); }
.g8 { background: linear-gradient(135deg, #fb923c, #fbbf24); }
.g9 { background: linear-gradient(135deg, #a78bfa, #e879f9); }

/* 全画面ギャラリー */
.gallery-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 235;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s, background 0.35s ease;
  padding: 1rem;
}

.gallery-fs-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.gallery-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  padding: 2.5rem 0 1rem;
  flex: 0 0 auto;
}

.gallery-fs-mode-label {
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

.gallery-fs-body {
  flex: 0 1 auto;
  padding: 1rem 0.5rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: visible;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.75rem;
}

.gallery-fs-body .gallery-demo {
  width: 100%;
}

.gallery-fs-body .gallery-demo--main,
.gallery-fs-body .gallery-demo--main-slide {
  max-width: 40rem;
  align-self: center;
  width: 100%;
}

.gallery-fs-body .gallery-demo--main-slide .gallery-sync-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.gallery-fs-body .gallery-demo--main-slide .gallery-sync-main-viewport {
  grid-column: 1;
  grid-row: 1;
  width: 100%;
  min-width: 0;
}

.gallery-fs-body .gallery-demo--main-slide .gallery-sync-arrow--main {
  grid-column: 1;
  grid-row: 1;
  align-self: center;
  z-index: 2;
  margin: 0 0.35rem;
}

.gallery-fs-body .gallery-demo--main-slide .gallery-sync-arrow--main.prev {
  justify-self: start;
}

.gallery-fs-body .gallery-demo--main-slide .gallery-sync-arrow--main.next {
  justify-self: end;
}

.gallery-fs-body .gallery-sync-thumb-visual {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border: 3px solid var(--border);
  border-radius: 6px;
}

.gallery-fs-body .gallery-sync-thumbs-viewport {
  padding: 10px 12px;
  overflow: hidden;
}

.gallery-fs-body .gallery-sync-thumbs-track {
  gap: 0.75rem;
  padding: 2px 4px;
}

.gallery-fs-body .gallery-sync-thumb {
  overflow: visible;
  opacity: 0.42;
  transition: opacity calc(0.2s / var(--local-speed, 1));
}

.gallery-fs-body .gallery-sync-thumb.is-active {
  opacity: 1;
  position: relative;
  z-index: 1;
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.gallery-fs-body .gallery-sync-thumb.is-active .gallery-sync-thumb-visual {
  border-color: var(--accent);
  border-width: 4px;
  box-shadow: inset 0 0 0 3px var(--accent);
}

.gallery-fs-body .gallery-main-thumb {
  overflow: visible;
  opacity: 0.42;
  transition: opacity calc(0.2s / var(--local-speed, 1));
}

.gallery-fs-body .gallery-main-thumb.is-active {
  opacity: 1;
  position: relative;
  z-index: 1;
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.gallery-fs-body .gallery-main-thumb-visual {
  border: 3px solid var(--border);
  border-radius: 6px;
}

.gallery-fs-body .gallery-main-thumb.is-active .gallery-main-thumb-visual {
  border-color: var(--accent);
  border-width: 4px;
  box-shadow: inset 0 0 0 3px var(--accent);
}

/* 全画面：枠いっぱい・4/3/2列（書籍と同じ段数・以前の見た目の大きさ） */
.gallery-fs-body .gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  columns: unset;
  padding: 0 15px;
  width: 100%;
  margin: 0;
  box-sizing: border-box;
}

.gallery-fs-body .gallery > li {
  margin-bottom: 0;
  break-inside: auto;
}

.gallery-fs-body .gallery-tile-label {
  font-size: 0.75rem;
}

@media only screen and (max-width: 900px) {
  .gallery-fs-body .gallery {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media only screen and (max-width: 768px) {
  .gallery-fs-body .gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.gallery-fs-body .gallery-main-thumbs--static {
  grid-template-columns: repeat(6, minmax(3rem, 1fr));
  max-width: 36rem;
  margin: 0 auto;
}

.gallery-fs-body .gallery-sync-arrow--main {
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.35rem;
}

.gallery-fs-body .gallery-sync-arrow--thumb {
  width: 2.25rem;
  height: 2.25rem;
}

.gallery-fs-body .gallery-group-covers {
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: 0.75rem;
}

.gallery-fs-body .gallery-pattern-toolbar {
  min-height: 2.35rem;
}

/* ----- Ch.6-3 動画 ----- */
.video-stage {
  padding: 0.15rem 0;
}

.video-patterns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.85rem;
}

.video-pattern {
  display: grid;
  grid-template-rows: auto auto auto auto;
  gap: 0.55rem;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.video-pattern-foot {
  margin: 0;
  padding: 0.5rem 0.65rem;
  font-size: 0.625rem;
  line-height: 1.45;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.video-pattern-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.video-pattern-label small {
  display: block;
  font-size: 0.625rem;
  opacity: 0.85;
  margin-top: 0.15rem;
}

.video-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #000;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-thumb-media,
.video-thumb-poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-thumb-scrim {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.15));
  pointer-events: none;
}

.video-thumb-scrim--yt {
  background: linear-gradient(to top, rgba(0, 0, 0, 0.35), transparent 55%);
}

.video-thumb-yt-shell {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.video-thumb--youtube .video-yt-altbg {
  position: absolute;
  inset: 0;
}

.video-thumb--youtube .video-yt-brand {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  opacity: 1;
  pointer-events: none;
}

.video-thumb--youtube .video-yt-brand-logo svg {
  width: 2.75rem;
  height: auto;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.45));
}

.video-thumb--youtube .video-yt-brand-name {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: rgba(255, 255, 255, 0.96);
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.55);
}

.video-thumb-caption {
  position: relative;
  z-index: 3;
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.45);
}

.video-pattern .video-fs-open {
  align-self: stretch;
  width: 100%;
}

.video-yt-timing {
  position: absolute;
  left: 1rem;
  right: auto;
  bottom: 1rem;
  z-index: 6;
  width: min(22rem, calc(100% - 2rem));
  display: grid;
  gap: 0.55rem;
  padding: 0.75rem 1rem;
  background: rgba(12, 12, 16, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  pointer-events: auto;
}

.video-yt-timing[hidden] {
  display: none !important;
}

@media (min-width: 640px) {
  .video-yt-timing {
    left: 1.25rem;
    bottom: 1.25rem;
    width: min(22rem, calc(100% - 2.5rem));
  }

  .video-yt-timing-sliders {
    grid-template-columns: 1fr;
  }
}

.video-yt-timing-title {
  margin: 0;
  font-size: 0.6875rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.72);
}

.video-yt-timing-sliders {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.65rem 1.25rem;
}

.video-yt-timing-item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 0.15rem 0.5rem;
  align-items: center;
  font-size: 0.6875rem;
}

.video-yt-timing-label {
  grid-column: 1;
  color: rgba(255, 255, 255, 0.72);
}

.video-yt-timing-label small {
  display: block;
  font-size: 0.625rem;
  opacity: 0.85;
}

.video-yt-timing-item input[type="range"] {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--accent);
}

.video-yt-timing-replay {
  justify-self: start;
  margin-top: 0.15rem;
}

.video-yt-timing-val {
  grid-column: 2;
  grid-row: 1;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--accent);
}

.video-fs-open {
  width: 100%;
  justify-content: center;
}

/* ----- 全画面：動画（Ch.6-3） ----- */
.video-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: #000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.video-fs-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

/* 書籍6-3：#loading.disappear → 非表示 */
#loading.disappear {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#loading {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  background: #000;
  transition: opacity var(--video-yt-loading-fade, 0.65s) ease, visibility var(--video-yt-loading-fade, 0.65s) ease;
}

.video-fs-overlay[data-mode="youtube"] #loading {
  background: rgba(0, 0, 0, 0.42);
}

#loading[hidden] {
  display: none;
}

#loading .video-fs-loading-text {
  margin: 0;
  font-size: 1.125rem;
  letter-spacing: 0.12em;
  color: #fff;
}

/* 書籍6-3：#youtube-area.appear → 動画とタイトルがふわっと表示 */
#youtube,
.video-bg-area .video-fs-html5 {
  opacity: 0;
  transition: opacity 0.9s ease;
}

#youtube-area.is-playing #youtube {
  opacity: 1;
  visibility: visible;
}

#youtube-area:not(.is-playing) #youtube {
  display: none;
}

.video-bg-area.appear .video-fs-html5 {
  opacity: 1;
}

.video-yt-title,
.video-bg-title {
  position: absolute;
  z-index: 2;
  margin: 0;
  padding: 0 1.5rem;
  font-size: clamp(2rem, 8vw, 4rem);
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  text-align: center;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.55);
  pointer-events: none;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s ease 0.15s, transform 0.9s ease 0.15s;
}

/* 書籍6-3：タイトルは上、YouTube ロゴは中央 */
.video-yt-title {
  inset: auto 0 auto 0;
  top: 12%;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  height: auto;
}

.video-bg-title {
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-yt-brand {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.9s ease 0.12s, visibility 0.9s ease 0.12s;
}

#youtube-area.appear .video-yt-brand:not(.is-hidden) {
  opacity: 1;
}

.video-yt-brand-logo svg {
  width: clamp(8rem, 34vw, 14rem);
  height: auto;
  filter: drop-shadow(0 6px 24px rgba(0, 0, 0, 0.5));
}

.video-yt-brand-name {
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(3rem, 13vw, 5.5rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: rgba(255, 255, 255, 0.96);
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.6);
}

#youtube-area.appear .video-yt-title,
.video-bg-area.appear .video-bg-title {
  opacity: 1;
  transform: translateY(0);
}

.video-fs-body {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.video-fs-content {
  position: absolute;
  inset: 0;
  z-index: 4;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 4rem 1.5rem 2rem;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transform: translateY(24px);
}

.video-fs-content.appear {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.9s ease 0.12s, transform 0.9s ease 0.12s;
}

.video-bg-area,
#youtube-area {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: #000;
}

/* 書籍6-3：代替背景（動画サムネではない静止画） */
.video-yt-altbg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: #1c1c1c;
}

.video-yt-altbg-pattern {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(255, 255, 255, 0.06), transparent 70%),
    linear-gradient(to bottom, #222 0%, #141414 100%);
}

#youtube-area.is-playing .video-yt-brand,
#youtube-area.is-playing .video-yt-altbg {
  display: none !important;
}

.video-bg-area video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#youtube {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
}

#youtube iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 177.78vh;
  height: 100vh;
  min-width: 100%;
  min-height: 56.25vw;
  transform: translate(-50%, -50%);
  border: 0;
  max-width: none;
}

#youtube-area.is-playing #youtube {
  overflow: visible;
}

#youtube-area.is-playing #youtube iframe {
  top: auto;
  bottom: 0;
  left: 50%;
  width: 177.78vh;
  height: 100vh;
  min-width: 100%;
  min-height: 56.25vw;
  transform: translateX(-50%);
}

.video-fs-scrim--yt {
  display: none;
}

/* 再生中：右下 YouTube ロゴ（背景動画 embed では公式 UI が消えるため常時表示） */
.video-yt-corner-mark {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  z-index: 5;
  display: none;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.65rem;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.72);
  pointer-events: none;
}

#youtube-area.is-playing .video-yt-corner-mark {
  display: flex;
}

.video-yt-corner-mark svg {
  width: 2.125rem;
  height: auto;
  flex-shrink: 0;
}

.video-yt-corner-name {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: rgba(255, 255, 255, 0.95);
}

.video-fs-scrim {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

.video-fs-mode-label {
  margin: 0;
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-weight: 700;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
}

.video-fs-caption {
  margin: 0;
  max-width: 36rem;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.88);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.45);
}

.video-fs-overlay .fs-close {
  z-index: 10001;
}

/* ----- Ch.7-1 ボタン（書籍28パターン） ----- */
.btn-book-stage {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 0.15rem 0;
}

.btn-book-section {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.btn-book-section--flow {
  padding-top: 0.35rem;
  border-top: 1px solid var(--border);
}

.btn-book-section-title {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.65rem;
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
}

.btn-book-section-meta {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text-muted);
}

.btn-book-grid {
  display: grid;
  gap: 0.75rem;
}

.btn-book-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 720px) {
  .btn-book-grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .btn-book-grid--3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

.btn-book-cell {
  display: grid;
  grid-template-rows: auto auto auto;
  justify-items: center;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0.75rem 0.5rem 0.85rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.btn-book-fs-open {
  width: 100%;
  justify-content: center;
}

/* 全画面：ボタン（Ch.7-1） */
.btn-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: var(--bg);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  overflow-y: auto;
}

.btn-fs-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.btn-fs-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  width: min(100%, 40rem);
  margin: auto;
  padding: 2.5rem 0 1rem;
}

.btn-fs-mode-label {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
}

.btn-fs-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: min(52vh, 420px);
  padding: 2rem 1.5rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: visible;
}

.btn-fs-hint {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

.btn7-fs-large {
  min-width: 11rem;
  min-height: 3.35rem;
  padding: 0.8rem 2rem;
  font-size: 1.0625rem;
}

.btn7-fs-large.btn7-circle-morph {
  min-width: 3.35rem;
  width: 3.35rem;
}

.btn7-fs-large.btn7-circle-morph:hover {
  min-width: 11rem;
  width: auto;
}

.btn-fs-overlay .fs-close {
  z-index: 10001;
}

.btn-book-label {
  margin: 0;
  min-height: 2.6em;
  font-size: 0.625rem;
  line-height: 1.35;
  text-align: center;
  color: var(--text-muted);
}

.btn7 {
  position: relative;
  z-index: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-width: 7.25rem;
  min-height: 2.45rem;
  padding: 0.5rem 1rem;
  border: 2px solid var(--accent);
  background: transparent;
  color: var(--accent);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  transition:
    color 0.3s ease,
    background 0.3s ease,
    border-color 0.3s ease,
    transform 0.25s ease,
    box-shadow 0.3s ease,
    border-radius 0.35s ease,
    width 0.4s ease,
    min-width 0.4s ease,
    padding 0.4s ease;
}

.btn7:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* 1. 背景が流れる */
.btn7-bg-flow {
  color: #fff;
  border-color: transparent;
  background: var(--accent);
}

.btn7-bg-flow::before {
  content: '';
  position: absolute;
  inset: -60% -40%;
  z-index: -1;
  background: repeating-linear-gradient(
    -35deg,
    rgba(255, 255, 255, 0) 0 12px,
    rgba(255, 255, 255, 0.22) 12px 24px
  );
  animation: btn7FlowDiag 2.4s linear infinite;
}

.btn7-spin {
  transition: transform 0.6s ease, color 0.3s ease, background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, border-radius 0.35s ease, width 0.4s ease, min-width 0.4s ease, padding 0.4s ease;
}

.btn7-spin:hover {
  transform: rotate(360deg);
}

/* 3. クリック波紋 — JS */
.btn7-ripple-click .btn7-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
  transform: scale(0);
  animation: btn7RippleClick 0.65s ease-out;
  pointer-events: none;
}

@keyframes btn7RippleClick {
  to { transform: scale(4); opacity: 0; }
}

/* 4. 無限波紋 */
.btn7-ripple-infinite::before,
.btn7-ripple-infinite::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 140%;
  aspect-ratio: 1;
  border: 2px solid var(--accent);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0.25);
  opacity: 0.55;
  animation: btn7Ring 2.2s ease-out infinite;
  pointer-events: none;
}

.btn7-ripple-infinite::after {
  animation-delay: 1.1s;
}

@keyframes btn7Ring {
  0% { transform: translate(-50%, -50%) scale(0.25); opacity: 0.55; }
  100% { transform: translate(-50%, -50%) scale(1.05); opacity: 0; }
}

/* 5. ふわっと波紋 */
.btn7-ripple-soft:hover {
  animation: btn7RippleSoft 1.1s ease-out infinite;
}

@keyframes btn7RippleSoft {
  0% { box-shadow: 0 0 0 0 rgba(129, 140, 248, 0.45); }
  70% { box-shadow: 0 0 0 14px rgba(129, 140, 248, 0); }
  100% { box-shadow: 0 0 0 0 rgba(129, 140, 248, 0); }
}

/* 6. 押し込み（円縮小） */
.btn7-press-circle:active {
  transform: scale(0.88);
  border-radius: 999px;
}

/* 7. 押し込み（立体→平面） */
.btn7-press-flat {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 4px 0 color-mix(in srgb, var(--accent) 55%, #000);
  transform: translateY(0);
}

.btn7-press-flat:active {
  box-shadow: none;
  transform: translateY(4px);
}

/* 8. 浮き上がる */
.btn7-lift {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.btn7-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(99, 102, 241, 0.35);
}

/* 9. グラデーション変化 */
.btn7-gradient {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(120deg, #6366f1, #8b5cf6, #6366f1);
  background-size: 200% 200%;
}

.btn7-gradient:hover {
  background-position: 100% 0;
}

/* 10. 線→塗り（下から） */
.btn7-line-fill::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.35s ease;
}

.btn7-line-fill:hover {
  color: #fff;
}

.btn7-line-fill:hover::before {
  transform: scaleY(1);
}

/* 11. 線が伸びる */
.btn7-line-grow {
  border-color: transparent;
  background: transparent;
}

.btn7-line-grow::after {
  content: '';
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.45rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.btn7-line-grow:hover::after {
  transform: scaleX(1);
}

/* 12. 線→塗り1（左から） */
.btn7-line-fill-1::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.btn7-line-fill-1:hover {
  color: #fff;
}

.btn7-line-fill-1:hover::before {
  transform: scaleX(1);
}

/* 13. 線→塗り2（中央から横） */
.btn7-line-fill-2::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.35s ease;
}

.btn7-line-fill-2:hover {
  color: #fff;
}

.btn7-line-fill-2:hover::before {
  transform: scaleX(1);
}

/* 14. 塗り→線 */
.btn7-fill-line {
  background: var(--accent);
  color: #fff;
}

.btn7-fill-line:hover {
  background: transparent;
  color: var(--accent);
}

/* 15. 丸→ボタン */
.btn7-circle-morph {
  min-width: 2.45rem;
  width: 2.45rem;
  max-width: 100%;
  padding-inline: 0;
  border-radius: 999px;
  justify-self: center;
}

.btn7-circle-morph:hover {
  min-width: 7.25rem;
  width: auto;
  padding-inline: 1rem;
  border-radius: 6px;
}

/* 16. 角丸変化 */
.btn7-radius {
  border-radius: 2px;
}

.btn7-radius:hover {
  border-radius: 999px;
}

/* 17. テキスト切替 */
.btn7-text-swap {
  min-width: 7.25rem;
}

.btn7-text-swap .btn7-text-a,
.btn7-text-swap .btn7-text-b {
  display: block;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

.btn7-text-swap .btn7-text-b {
  position: absolute;
  opacity: 0;
  transform: translateY(100%);
}

.btn7-text-swap:hover .btn7-text-a {
  opacity: 0;
  transform: translateY(-100%);
}

.btn7-text-swap:hover .btn7-text-b {
  opacity: 1;
  transform: translateY(0);
}

/* 18. きらっと光る */
.btn7-shine {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn7-shine::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40%;
  height: 200%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  transform: skewX(-20deg) translateX(-120%);
  transition: transform 0.55s ease;
}

.btn7-shine:hover::after {
  transform: skewX(-20deg) translateX(320%);
}

/* 19. ボタン内矢印 */
.btn7-arrow-inner .btn7-arrow {
  display: inline-block;
  transition: transform 0.3s ease;
}

.btn7-arrow-inner:hover .btn7-arrow {
  transform: translateX(5px);
}

/* 20. 矢印が動く */
.btn7-arrow-move .btn7-arrow-out {
  display: inline-block;
  margin-left: 0.15rem;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.btn7-arrow-move:hover .btn7-arrow-out {
  transform: translateX(8px);
  opacity: 0.85;
}

/* 21–28. 背景が流れる（方向別） */
.btn7-flow-lr,
.btn7-flow-tb,
.btn7-flow-cx,
.btn7-flow-out,
.btn7-flow-rl,
.btn7-flow-bt,
.btn7-flow-cy,
.btn7-flow-diag {
  color: #fff;
  border-color: transparent;
  background: color-mix(in srgb, var(--accent) 88%, #000);
}

.btn7-flow-lr::before,
.btn7-flow-tb::before,
.btn7-flow-rl::before,
.btn7-flow-bt::before,
.btn7-flow-diag::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  opacity: 0;
  pointer-events: none;
}

.btn7-flow-cx::before,
.btn7-flow-cy::before,
.btn7-flow-out::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  pointer-events: none;
  transform-origin: center center;
}

.btn7-flow-cx::before {
  background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.5) 50%, transparent 100%);
}

.btn7-flow-cy::before {
  background: linear-gradient(180deg, transparent 0%, rgba(255, 255, 255, 0.5) 50%, transparent 100%);
}

.btn7-flow-out::before {
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0.12) 42%, transparent 68%);
}

.btn7.btn7-flow-out {
  overflow: visible;
}

/* サムネ・全画面では常時再生 / 通常はホバー */
.btn7-flow-lr:hover::before,
.btn-book-cell .btn7-flow-lr::before,
.btn-fs-stage .btn7-flow-lr::before {
  opacity: 1;
  animation: btn7FlowLR 1.1s linear infinite;
}

.btn7-flow-tb:hover::before,
.btn-book-cell .btn7-flow-tb::before,
.btn-fs-stage .btn7-flow-tb::before {
  opacity: 1;
  animation: btn7FlowTB 1.1s linear infinite;
}

.btn7-flow-rl:hover::before,
.btn-book-cell .btn7-flow-rl::before,
.btn-fs-stage .btn7-flow-rl::before {
  opacity: 1;
  animation: btn7FlowRL 1.1s linear infinite;
}

.btn7-flow-bt:hover::before,
.btn-book-cell .btn7-flow-bt::before,
.btn-fs-stage .btn7-flow-bt::before {
  opacity: 1;
  animation: btn7FlowBT 1.1s linear infinite;
}

.btn7-flow-diag:hover::before,
.btn-book-cell .btn7-flow-diag::before,
.btn-fs-stage .btn7-flow-diag::before {
  opacity: 1;
  animation: btn7FlowDiag 1.1s linear infinite;
}

.btn7-flow-cx:hover::before,
.btn-book-cell .btn7-flow-cx::before,
.btn-fs-stage .btn7-flow-cx::before {
  opacity: 1;
  animation: btn7FlowCX 0.9s ease-in-out infinite alternate;
}

.btn7-flow-cy:hover::before,
.btn-book-cell .btn7-flow-cy::before,
.btn-fs-stage .btn7-flow-cy::before {
  opacity: 1;
  animation: btn7FlowCY 0.9s ease-in-out infinite alternate;
}

.btn7-flow-out:hover::before,
.btn-book-cell .btn7-flow-out::before,
.btn-fs-stage .btn7-flow-out::before {
  opacity: 1;
  animation: btn7FlowOut 1.1s ease-out infinite;
}

@keyframes btn7FlowCX {
  from { transform: scaleX(0.08); opacity: 0.35; }
  to { transform: scaleX(1); opacity: 1; }
}

@keyframes btn7FlowCY {
  from { transform: scaleY(0.08); opacity: 0.35; }
  to { transform: scaleY(1); opacity: 1; }
}

@keyframes btn7FlowOut {
  0% { transform: scale(0.15); opacity: 0.9; }
  100% { transform: scale(1.45); opacity: 0; }
}

@keyframes btn7FlowLR {
  from { transform: translateX(-120%); }
  to { transform: translateX(120%); }
}

@keyframes btn7FlowRL {
  from { transform: translateX(120%); }
  to { transform: translateX(-120%); }
}

@keyframes btn7FlowTB {
  from { transform: translateY(-120%); }
  to { transform: translateY(120%); }
}

@keyframes btn7FlowBT {
  from { transform: translateY(120%); }
  to { transform: translateY(-120%); }
}

@keyframes btn7FlowDiag {
  from { transform: translate(-35%, -35%); }
  to { transform: translate(35%, 35%); }
}

/* ----- Ch.7-2 検索（3パターン） ----- */
.search-stage {
  padding: 0.15rem 0;
}

.search-patterns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.85rem;
}

.search-pattern {
  display: grid;
  grid-template-rows: auto auto 1fr auto auto;
  gap: 0.55rem;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 200px;
}

.search-pattern-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.4;
  min-height: 2.8em;
}

.search-pattern-note {
  font-size: 0.625rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.search-fs-open {
  width: 100%;
  justify-content: center;
}

.search-pattern-demo {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 5.5rem;
  min-width: 0;
}

/* パターン2・3サムネ：同じステージ枠（高さは1と揃える） */
.search-pattern-demo--focus,
.search-pattern-demo--slide {
  align-items: stretch;
  position: relative;
  width: 100%;
  border-radius: 8px;
  background: var(--bg-stage);
  border: 1px solid var(--border);
  min-height: 5.5rem;
}

.search-pattern-demo--focus {
  overflow: hidden;
}

.search-pattern-demo--slide {
  overflow: visible;
}

/* パターン2：panelactive（サムネ＝枠内 / 全画面＝ビューポート） */
.search-panel-demo--thumb {
  position: relative;
  width: 100%;
  min-height: 5.5rem;
}

.search-panel-demo .open-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 5;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface-2);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.search-panel-demo .open-btn:hover {
  border-color: var(--accent);
}

.search-panel-demo--fs .open-btn {
  width: 50px;
  height: 50px;
}

.open-btn-icon--close {
  display: none;
  font-size: 1.5rem;
  line-height: 1;
  font-weight: 300;
}

.search-panel-demo.is-panel-open .open-btn-icon--search {
  display: none;
}

.search-panel-demo.is-panel-open .open-btn-icon--close {
  display: block;
}

.search-panel-demo.is-panel-open .open-btn {
  z-index: 5;
  color: #fff;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.45);
}

.search-panel-demo.is-panel-open .open-btn:hover {
  border-color: #fff;
}

.search-panel-demo--thumb .search-panel-wrap {
  position: absolute;
  top: 0;
  left: 0;
  z-index: -1;
  opacity: 0;
  width: 100%;
  height: 100%;
  transition: all calc(0.4s / var(--local-speed, 1));
  pointer-events: none;
}

.search-panel-demo .search-panel-wrap.panelactive {
  opacity: 1;
  z-index: 1;
  background: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.65rem 0.5rem;
  pointer-events: auto;
}

.search-panel-demo--fs {
  position: relative;
  width: 100%;
  min-height: min(50vh, 20rem);
}

.search-panel-demo--fs .search-panel-wrap {
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
  opacity: 0;
  width: 100%;
  height: 100vh;
  transition: all calc(0.4s / var(--local-speed, 1));
  pointer-events: none;
}

.search-panel-demo--fs .search-panel-wrap.panelactive {
  padding: 1.5rem 1rem;
}

.search-panel-wrap .search-area {
  display: none;
}

.search-panel-wrap.panelactive .search-area {
  display: block;
  width: 80%;
  position: relative;
}

.search-panel-demo--thumb .search-panel-wrap.panelactive .search-area {
  width: 88%;
}

.search-panel-form {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  box-sizing: border-box;
  padding: 0.55rem 0.35rem 0.6rem 0.5rem;
  border-bottom: 2px solid rgba(255, 255, 255, 0.35);
  transition:
    background calc(0.5s / var(--local-speed, 1)),
    border-color calc(0.35s / var(--local-speed, 1));
}

.search-panel-demo--thumb .search-panel-form {
  min-height: 52px;
}

.search-panel-demo--fs .search-panel-form {
  min-height: 72px;
  gap: 1rem;
  padding: 0.85rem 0.5rem 0.95rem 0.65rem;
}

.search-panel-field-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  color: #fff;
}

.search-panel-demo--thumb .search-panel-field-icon .search-toggle-icon {
  width: 20px;
  height: 20px;
  color: #fff;
}

.search-panel-demo--fs .search-panel-field-icon .search-toggle-icon {
  width: 24px;
  height: 24px;
  color: #fff;
}

.search-panel-wrap .search-panel-input {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  min-width: 0;
  margin: 0;
  border: none;
  background: transparent;
  outline: none;
  color: #fff;
  font-family: inherit;
  letter-spacing: 0.05em;
  line-height: 1.4;
  padding: 0;
  height: auto;
  align-self: center;
}

.search-panel-demo--thumb .search-panel-input {
  font-size: 0.875rem;
}

.search-panel-demo--fs .search-panel-input {
  font-size: 1.0625rem;
}

.search-panel-wrap .search-panel-input::placeholder {
  color: rgba(255, 255, 255, 0.62);
  opacity: 1;
}

.search-panel-form:focus-within {
  background: rgba(255, 255, 255, 0.1);
  border-bottom-color: rgba(255, 255, 255, 0.75);
}

.search-panel-wrap .search-toggle-icon {
  display: block;
  color: #fff;
}

/* パターン2・全画面：ギャラリー同型（枠の中で虫眼鏡↔×、閉じるはシェル右上） */
.search-fs-shell[data-fs-mode='overlay'] .search-fs-body {
  padding: 0;
  border: none;
  background: transparent;
  min-height: 0;
  align-items: stretch;
  width: 100%;
}

.search-fs-shell[data-fs-mode='overlay'] .search-panel-demo--fs {
  position: relative;
  width: 100%;
  min-height: min(50vh, 22rem);
  border-radius: var(--radius-lg);
  background: var(--bg-stage);
  border: 1px solid var(--border);
  overflow: hidden;
}

.search-fs-shell[data-fs-mode='overlay'] .search-panel-demo--fs .search-panel-wrap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}


.search-toggle-icon {
  display: block;
  color: var(--text);
}

.search-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface-2);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.2s, background 0.2s;
}

.search-toggle:hover {
  border-color: var(--accent);
}

/* パターン1：横に伸びる */
.search-expand {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  transition:
    max-width calc(0.4s / var(--local-speed, 1)) ease,
    border-color 0.2s;
  max-width: 44px;
}

.search-expand.open {
  max-width: min(100%, 260px);
  border-color: var(--accent);
}

.search-expand input {
  width: 0;
  min-width: 0;
  border: none;
  background: none;
  color: var(--text);
  font-family: inherit;
  font-size: 0.8125rem;
  padding: 0;
  opacity: 0;
  pointer-events: none;
  position: absolute;
  left: 44px;
  transition:
    width calc(0.4s / var(--local-speed, 1)) ease,
    opacity calc(0.3s / var(--local-speed, 1)),
    padding calc(0.4s / var(--local-speed, 1));
}

.search-expand.open input {
  position: static;
  width: 11rem;
  max-width: calc(100% - 44px);
  padding: 0 0.85rem 0 0;
  opacity: 1;
  pointer-events: auto;
  outline: none;
}

/* 全画面検索（ギャラリーと同型） */
.search-fs-shell {
  position: fixed;
  inset: 0;
  z-index: 238;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: 1rem;
}

.search-fs-shell.is-open {
  display: flex;
}

.search-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  padding: 2.5rem 0 1rem;
  flex: 0 0 auto;
}

.search-fs-mode-label {
  margin: 0;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

.search-fs-body {
  flex: 0 1 auto;
  padding: 1.25rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: visible;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 12rem;
}

.search-fs-body .search-slide,
.search-fs-body .search-panel-demo--fs {
  width: 100%;
  align-self: stretch;
}

.search-fs-bar {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: min(100%, 28rem);
  margin: 0 auto;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
}

.search-fs-input {
  flex: 1;
  min-width: 0;
  border: none;
  background: none;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
}

.search-fs-body .search-expand.open {
  max-width: min(100%, 420px);
}

.search-fs-body .search-expand.open input {
  width: 18rem;
  max-width: calc(100% - 44px);
  font-size: 1rem;
}

.search-fs-body .search-slide {
  min-height: min(50vh, 20rem);
}

.search-fs-shell .fs-close {
  z-index: 239;
}

/* パターン3：右上の虫眼鏡の真下に、小さくふわっと検索窓 */
.search-slide {
  position: relative;
  width: 100%;
  min-height: 5.5rem;
}

.search-slide-anchor {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.search-slide.open .open-btn-icon--search {
  display: none;
}

.search-slide.open .open-btn-icon--close {
  display: block;
  font-size: 1.5rem;
  line-height: 1;
  font-weight: 300;
}

.search-slide.open .search-slide-toggle {
  border-color: var(--accent);
}

.search-slide-panel {
  position: absolute;
  top: calc(100% + 0.4rem);
  right: 0;
  width: min(12.5rem, calc(100vw - 2rem));
  transform: translateY(-0.35rem);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  transition:
    transform calc(0.45s / var(--local-speed, 1)) cubic-bezier(0.22, 1, 0.36, 1),
    opacity calc(0.35s / var(--local-speed, 1)) ease,
    visibility calc(0.35s / var(--local-speed, 1));
}

.search-slide.open .search-slide-panel {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.search-slide-field {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.55rem;
}

.search-slide-field-icon {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  color: var(--text-muted);
}

.search-slide-field input {
  flex: 1;
  min-width: 0;
  border: none;
  background: none;
  color: var(--text);
  font-family: inherit;
  font-size: 0.75rem;
  outline: none;
}

.search-fs-body .search-slide {
  min-height: min(36vh, 14rem);
}

.search-fs-body .search-slide-anchor {
  top: 10px;
  right: 10px;
}

.search-fs-body .search-slide-panel {
  width: min(20rem, 88vw);
}

.search-fs-body .search-slide-field {
  padding: 0.65rem 0.75rem;
  gap: 0.55rem;
}

.search-fs-body .search-slide-field input {
  font-size: 0.9375rem;
}

/* ----- Ch.8-1 ページトップ（9パターン） ----- */
.pagtop-stage {
  padding: 0.1rem 0;
}

.pagtop-patterns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

@media (max-width: 900px) {
  .pagtop-patterns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .pagtop-patterns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.pagtop-pattern {
  display: grid;
  grid-template-rows: minmax(0, auto) minmax(11rem, 1fr) auto;
  gap: 0.55rem;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 200px;
}

.pagtop-pattern-label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.pagtop-fs-open {
  width: 100%;
  justify-content: center;
}

.pagtop-pattern-demo {
  min-width: 0;
}

/* 指定高さ・指定範囲で出現 */
.pagtop-threshold-demo,
.pagtop-range-demo {
  position: relative;
}

.pagtop-demo-pagetop.pagetop-fab--enter-right {
  transform: translateX(0.75rem);
}

.pagtop-demo-pagetop.pagetop-fab--enter-right.is-visible {
  transform: translateX(0);
}

.pagtop-demo-pagetop.pagetop-fab--enter-right.is-hiding {
  transform: translateX(0.75rem);
}

/* 5番のみ：書籍 LeftMove / RightMove（サイトの accent 円ボタン） */
.pagtop-range-right-demo {
  position: relative;
  overflow: hidden;
}

.pagtop-range-right-demo .pagtop-range-right-fab.pagetop-fab {
  opacity: 0;
  transform: translateX(calc(100% + 0.65rem));
  transition: all 0.5s ease;
  pointer-events: none;
}

.pagtop-range-right-demo .pagtop-range-right-fab.pagetop-fab.LeftMove {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.pagtop-range-right-demo .pagtop-range-right-fab.pagetop-fab.RightMove {
  opacity: 1;
  transform: translateX(calc(100% + 0.65rem));
  pointer-events: none;
}

/* 6番のみ：4・5番と同じ枠右下 + 書籍 #page-top ラッパーで bottom 調整 */
.pagtop-footer-stop-demo {
  position: relative;
  overflow: hidden;
  width: 100%;
  align-self: start;
  flex: 0 0 auto;
}

.pagtop-footer-stop-demo .pagtop-footer-stop-anchor {
  position: absolute;
  right: 10px;
  bottom: 10px;
  z-index: 3;
}

.pagtop-footer-stop-demo .pagtop-footer-stop-fab {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 50%;
  box-shadow:
    0 10px 28px rgba(99, 102, 241, 0.35),
    0 2px 8px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  opacity: 0;
  transform: translateY(100px);
  transition: background 0.2s ease, box-shadow 0.2s ease;
  pointer-events: none;
}

.pagtop-footer-stop-demo .pagtop-footer-stop-fab.UpMove {
  animation: pagtopFooterUpAnime 0.5s forwards;
  pointer-events: auto;
}

.pagtop-footer-stop-demo .pagtop-footer-stop-fab.DownMove {
  animation: pagtopFooterDownAnime 0.5s forwards;
  pointer-events: none;
}

.pagtop-footer-stop-demo .pagtop-footer-stop-fab:hover {
  background: var(--accent-hover);
}

.pagtop-footer-stop-demo .pagtop-footer-stop-fab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@keyframes pagtopFooterUpAnime {
  from {
    opacity: 0;
    transform: translateY(100px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pagtopFooterDownAnime {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 1;
    transform: translateY(100px);
  }
}

/* 7番のみ：書籍 PageTopCheck（縦書きテキストリンク・形状切替） */
.pagtop-shape-scroll-demo {
  position: relative;
  overflow: hidden;
  width: 100%;
  align-self: start;
  flex: 0 0 auto;
}

.pagtop-shape-scroll-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-bottom: 2.5rem;
}

.pagtop-shape-scroll-body .pagtop-block {
  margin-top: 0;
  min-height: 5rem;
  flex-shrink: 0;
}

.pagtop-shape-scroll-demo--fs .pagtop-shape-scroll-body .pagtop-block {
  min-height: 14rem;
  height: auto;
}

.pagtop-fs-body .pagtop-shape-scroll-demo {
  width: 100%;
  align-self: flex-start;
  flex: 0 0 auto;
}

.pagtop-shape-links {
  position: absolute;
  right: 0.55rem;
  bottom: 0.55rem;
  z-index: 3;
  pointer-events: none;
}

.pagtop-shape-link {
  position: absolute;
  right: 0;
  bottom: 0;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.5s ease,
    visibility 0.5s ease;
  writing-mode: vertical-rl;
  white-space: nowrap;
  animation: pagtopShapeArrowMove 1s ease-in-out infinite;
  pointer-events: none;
}

.pagtop-shape-link.pagtop-shape-scroll-view {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.pagtop-shape-link a {
  position: relative;
  display: block;
  padding: 0.15rem 0.35rem 0.15rem 0.15rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
  color: var(--accent);
}

.pagtop-shape-link a:hover {
  color: var(--accent-hover);
}

.pagtop-shape-scroll-link a::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 2px;
  height: 2.5rem;
  border-radius: 1px;
  background: currentColor;
}

.pagtop-shape-scroll-link a::before {
  content: "";
  position: absolute;
  top: 1.35rem;
  right: -5px;
  width: 2px;
  height: 1rem;
  border-radius: 1px;
  background: currentColor;
  transform: skewX(-31deg);
}

.pagtop-shape-pagetop-link a::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 2px;
  height: 2.5rem;
  border-radius: 1px;
  background: currentColor;
}

.pagtop-shape-pagetop-link a::before {
  content: "";
  position: absolute;
  top: 0;
  right: -5px;
  width: 2px;
  height: 1rem;
  border-radius: 1px;
  background: currentColor;
  transform: skewX(31deg);
}

@keyframes pagtopShapeArrowMove {
  0% {
    bottom: 0;
  }
  50% {
    bottom: 5px;
  }
  100% {
    bottom: 0;
  }
}

/* 8番のみ：書籍 #page-top（UpMove / DownMove / floatAnime）— サイト accent 円ボタン */
.pagtop-shape-click-demo {
  position: relative;
  overflow: hidden;
  width: 100%;
  align-self: start;
  flex: 0 0 auto;
}

.pagtop-shape-click-top {
  position: absolute;
  right: 10px;
  bottom: 30px;
  z-index: 3;
  margin: 0;
  opacity: 0;
  transform: translateY(150px);
  pointer-events: none;
}

.pagtop-shape-click-top.UpMove {
  animation: pagtopShapeClickUpAnime 0.5s forwards;
  pointer-events: auto;
}

.pagtop-shape-click-top.DownMove {
  animation: pagtopShapeClickDownAnime 0.5s forwards;
  pointer-events: none;
}

@keyframes pagtopShapeClickUpAnime {
  from {
    opacity: 0;
    transform: translateY(150px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pagtopShapeClickDownAnime {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 1;
    transform: translateY(150px);
  }
}

.pagtop-shape-click-top a {
  position: relative;
  display: block;
  width: 44px;
  height: 44px;
  color: #fff;
  text-align: center;
  text-transform: uppercase;
  text-decoration: none;
  font-size: 0.6rem;
  background: var(--accent);
  border: none;
  border-radius: 50%;
  box-shadow:
    0 10px 28px rgba(99, 102, 241, 0.35),
    0 2px 8px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.pagtop-shape-click-top a::before {
  content: "↑";
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1;
}

.pagtop-shape-click-top a:hover {
  background: var(--accent-hover);
  box-shadow:
    0 14px 32px rgba(99, 102, 241, 0.42),
    0 4px 10px rgba(0, 0, 0, 0.1);
}

.pagtop-shape-click-top a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.pagtop-shape-click-top.floatAnime a {
  width: 44px;
  height: 58px;
  border-radius: 22px;
  animation: pagtopShapeClickFloatAnime 2s linear infinite;
}

@keyframes pagtopShapeClickFloatAnime {
  0% {
    transform: translateX(0);
    opacity: 1;
  }
  25% {
    transform: translateX(-6px);
    opacity: 1;
  }
  50% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(6px);
    opacity: 1;
  }
}

.pagtop-shape-click-top span {
  position: absolute;
  bottom: -20px;
  right: 20px;
  color: var(--text-muted);
  font-size: 0.5625rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  pointer-events: none;
}

.pagtop-fs-body .pagtop-shape-click-demo {
  width: 100%;
  align-self: flex-start;
  flex: 0 0 auto;
}

/* 9番のみ：書籍 #page-top 帯リンク・easeInOutQuint スクロール */
.pagtop-scroll-speed-demo {
  display: flex;
  flex-direction: column;
  width: 100%;
  align-self: start;
  flex: 0 0 auto;
  overflow: hidden;
  min-height: 0;
}

.pagtop-pattern:has(.pagtop-scroll-speed-demo) .pagtop-pattern-demo {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.pagtop-pattern:has(.pagtop-scroll-speed-demo) .pagtop-fs-open {
  position: relative;
  z-index: 4;
}

.pagtop-scroll-speed-demo--thumb {
  height: 100%;
  max-height: 100%;
}

.pagtop-scroll-speed-demo--thumb .pagtop-scroll--thumb {
  flex: 1 1 0;
  min-height: 0;
  height: 0;
  max-height: none;
}

.pagtop-scroll-speed-demo--fs {
  min-height: min(72vh, 680px);
  max-height: min(72vh, 680px);
  box-sizing: border-box;
}

.pagtop-scroll-speed-demo--fs .pagtop-scroll--fs {
  flex: 1 1 0;
  min-height: 0;
  height: 0;
  max-height: none;
}

.pagtop-scroll-speed-demo .pagtop-block {
  flex-shrink: 0;
}

.pagtop-scroll-speed-controls {
  flex: 0 0 auto;
  padding: 0.5rem 0.65rem;
  background: var(--surface-2);
  border-top: 1px solid var(--border);
}

.pagtop-scroll-speed-controls-label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
}

.pagtop-scroll-speed-controls-text small {
  display: block;
  font-size: 0.6875rem;
  font-weight: 400;
  color: var(--text-muted);
}

.pagtop-scroll-speed-ms {
  width: 100%;
  accent-color: var(--accent);
}

.pagtop-scroll-speed-ms-val {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
}

.pagtop-scroll-speed-top {
  flex: 0 0 auto;
  margin: 0;
  z-index: 3;
}

.pagtop-scroll-speed-top a {
  display: block;
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
  color: #fff;
  text-align: center;
  text-transform: uppercase;
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.2;
  background: var(--accent);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.pagtop-scroll-speed-top a:hover {
  background: var(--accent-hover);
}

.pagtop-scroll-speed-top a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.pagtop-fs-body .pagtop-scroll-speed-demo {
  width: 100%;
  align-self: flex-start;
}

.pagtop-demo-pagetop {
  position: absolute;
  right: 0.45rem;
  bottom: 0.45rem;
  z-index: 3;
  width: 36px;
  height: 36px;
  font-size: 1rem;
}

.pagtop-scroll {
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--text-muted) 55%, transparent) transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-stage);
}

.pagtop-scroll::-webkit-scrollbar {
  width: 10px;
}

.pagtop-scroll::-webkit-scrollbar-track {
  background: color-mix(in srgb, var(--border) 40%, transparent);
  border-radius: 0 8px 8px 0;
}

.pagtop-scroll::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--text-muted) 50%, var(--border));
  border-radius: 6px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

.pagtop-scroll--thumb {
  height: 11rem;
  max-height: 11rem;
  flex-shrink: 0;
}

.pagtop-scroll-body {
  padding: 0.5rem;
}

.pagtop-block {
  min-height: 4rem;
  margin-top: 0.5rem;
  padding: 0.65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.pagtop-mock-footer {
  min-height: 2.5rem;
  margin-top: 0.5rem;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: 6px;
}

.pagtop-scroll--fs {
  height: min(72vh, 680px);
  max-height: min(72vh, 680px);
  width: 100%;
  flex-shrink: 0;
}

.pagtop-fs-body .pagtop-scroll--fs .pagtop-scroll-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.pagtop-fs-body .pagtop-scroll--fs .pagtop-block {
  min-height: 7rem;
  height: 7rem;
  margin-top: 0;
  box-sizing: border-box;
}

/* 7番全画面：共通 7rem 指定を上書き（枠内スクロール必須） */
.pagtop-fs-body .pagtop-shape-scroll-demo--fs .pagtop-scroll--fs .pagtop-block {
  min-height: 14rem;
  height: auto;
}

.pagtop-fs-shell {
  position: fixed;
  inset: 0;
  z-index: 237;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: 1rem;
}

.pagtop-fs-shell.is-open {
  display: flex;
}

.pagtop-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  padding: 2.5rem 0 1rem;
}

.pagtop-fs-mode-label {
  margin: 0;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

.pagtop-fs-body {
  padding: 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  min-width: 0;
  box-sizing: border-box;
}

.pagtop-fs-shell .fs-close {
  z-index: 238;
}

.pagtop-fs-book-scroll {
  width: 100%;
  max-height: min(72vh, 680px);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-stage);
}

.pagtop-fs-book-block {
  min-height: 50vh;
  padding: 2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  box-sizing: border-box;
}

.pagtop-fs-book-block:last-child {
  border-bottom: none;
}

/* ----- Ch.8-2 ページ内リンク（2パターン） ----- */
.anchor-stage {
  padding: 0.1rem 0;
}

.anchor-patterns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

@media (max-width: 720px) {
  .anchor-patterns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.anchor-pattern {
  display: grid;
  grid-template-rows: minmax(0, auto) minmax(11rem, 1fr) auto;
  gap: 0.55rem;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 200px;
}

.anchor-pattern-label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.anchor-fs-open {
  width: 100%;
  justify-content: center;
}

.anchor-pattern-demo {
  min-width: 0;
  min-height: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.anchor-scroll-demo {
  width: 100%;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}

.anchor-scroll-demo--thumb,
.anchor-scroll-demo--fs {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  height: 100%;
}

.anchor-scroll-stage {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-stage);
}

.anchor-scroll-stage--thumb,
.anchor-scroll-stage--fs {
  flex: 1 1 0;
  min-height: 0;
  height: auto;
}

.anchor-demo-header {
  padding: 0.45rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text);
  background: var(--gnav-bar, var(--mini-header-bg));
  border-bottom: 1px solid var(--gnav-border-strong, var(--border));
}

.anchor-static-header {
  position: relative;
  z-index: 1;
}

.anchor-sticky-header {
  position: sticky;
  top: 0;
  z-index: 2;
}

.anchor-scroll-stage--fs .anchor-demo-header {
  padding: 0.65rem 0.75rem;
  font-size: 0.875rem;
}

.anchor-thumb-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  flex-shrink: 0;
  pointer-events: auto;
}

.anchor-nav-link {
  display: inline-block;
  padding: 0.3rem 0.5rem;
  font-size: 0.625rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border: none;
  border-radius: 6px;
  background: transparent;
  font-family: inherit;
  line-height: 1.2;
  cursor: pointer;
  pointer-events: auto;
  transition: background 0.2s ease, color 0.2s ease;
}

.anchor-nav-link:hover {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent-hover);
}

.anchor-scroll-body {
  padding: 0.5rem;
}

.anchor-section {
  margin-bottom: 0.65rem;
  padding: 0.65rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-sizing: border-box;
}

.anchor-section:last-child {
  margin-bottom: 0;
}

.anchor-scroll-stage--thumb .anchor-section {
  min-height: 5rem;
}

.anchor-scroll-stage--fs .anchor-section {
  min-height: 19rem;
}

.anchor-section-title {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
}

.anchor-section-text {
  margin: 0;
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.anchor-fs-shell {
  position: fixed;
  inset: 0;
  z-index: 237;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: 1rem;
}

.anchor-fs-shell.is-open {
  display: flex;
}

.anchor-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  padding: 2.5rem 0 1rem;
}

.anchor-fs-mode-label {
  margin: 0;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

.anchor-fs-body {
  padding: 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  min-width: 0;
  box-sizing: border-box;
}

.anchor-fs-shell .fs-close {
  z-index: 238;
}

.anchor-fs-body .anchor-scroll-demo--fs {
  width: 100%;
  min-height: min(72vh, 680px);
}

/* ----- Ch.9-2 アコーディオンパネル（2パターン） ----- */
.accordion-stage {
  padding: 0.1rem 0;
}

.accordion-patterns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

@media (max-width: 720px) {
  .accordion-patterns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.accordion-pattern {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 0.5rem;
  padding: 0.85rem 1rem 0.65rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.accordion-pattern-label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.accordion-fs-open {
  width: 100%;
  justify-content: center;
}

.accordion-pattern-demo {
  min-width: 0;
}

/* 教材コード（toggle のみ） */
.accordion-demo--textbook {
  border: none;
  background: transparent;
  overflow: visible;
}

.accordion-demo--textbook.accordion-demo--thumb {
  padding: 0.15rem 0;
}

.accordion-demo--textbook.accordion-demo--fs {
  padding: 0;
}

.accordion-demo--textbook .accordion-area {
  list-style: none;
  width: 96%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0;
}

.accordion-demo--textbook .accordion-area li {
  margin: 10px 0;
}

.accordion-demo--textbook .accordion-area section {
  border: 1px solid #ccc;
}

.accordion-demo--textbook .title {
  position: relative;
  cursor: pointer;
  font-size: 1rem;
  font-weight: normal;
  padding: 3% 3% 3% 50px;
  margin: 0;
  color: var(--text);
  transition: all 0.5s ease;
}

.accordion-demo--textbook .title::before,
.accordion-demo--textbook .title::after {
  position: absolute;
  content: '';
  width: 15px;
  height: 2px;
  background-color: #333;
}

.accordion-demo--textbook .title::before {
  top: 48%;
  left: 15px;
  transform: rotate(0deg);
}

.accordion-demo--textbook .title::after {
  top: 48%;
  left: 15px;
  transform: rotate(90deg);
}

.accordion-demo--textbook .title.close::before {
  transform: rotate(45deg);
}

.accordion-demo--textbook .title.close::after {
  transform: rotate(-45deg);
}

.accordion-demo--textbook .box {
  display: none;
  background: #f3f3f3;
  margin: 0 3% 3% 3%;
  padding: 3%;
}

.accordion-demo--textbook .box p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.accordion-demo--thumb.accordion-demo--textbook .accordion-area li {
  margin: 6px 0;
}

.accordion-demo--thumb.accordion-demo--textbook .title {
  font-size: 0.6875rem;
  padding: 0.45rem 0.45rem 0.45rem 1.75rem;
}

.accordion-demo--thumb.accordion-demo--textbook .title::before,
.accordion-demo--thumb.accordion-demo--textbook .title::after {
  width: 10px;
  left: 0.45rem;
}

.accordion-demo--thumb.accordion-demo--textbook .box {
  margin: 0 3% 3% 3%;
  padding: 3%;
}

.accordion-demo--thumb.accordion-demo--textbook .box p {
  font-size: 0.625rem;
}

.accordion-fs-shell {
  position: fixed;
  inset: 0;
  z-index: 237;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: 1rem;
}

.accordion-fs-shell.is-open {
  display: flex;
}

.accordion-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 0 0.5rem;
}

.accordion-fs-mode-label {
  margin: 0;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

.accordion-fs-body {
  padding: 1rem 1rem 0.75rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  min-width: 0;
  box-sizing: border-box;
}

.accordion-fs-shell .fs-close {
  z-index: 238;
}

.accordion-fs-body .accordion-demo--fs {
  width: 100%;
  max-height: min(72vh, 680px);
  padding-bottom: 0.35rem;
}

/* ----- Ch.9-1 スクロールダウン（8パターン） ----- */
.scrolldown-stage {
  padding: 0.1rem 0;
}

.scrolldown-patterns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

@media (max-width: 900px) {
  .scrolldown-patterns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .scrolldown-patterns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.scrolldown-pattern {
  display: grid;
  grid-template-rows: minmax(0, auto) 11.5rem auto;
  gap: 0.55rem;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  align-content: start;
}

.scrolldown-pattern-label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.scrolldown-fs-open {
  width: 100%;
  justify-content: center;
}

.scrolldown-pattern-demo {
  min-width: 0;
  height: 11.5rem;
  max-height: 11.5rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.scrolldown-demo {
  flex: 1 1 auto;
  min-height: 0;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-stage);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.scrolldown-demo--fs {
  min-height: min(60vh, 480px);
}

.scrolldown-demo--scroll-page {
  display: block;
  padding: 0;
  overflow: hidden;
  height: 100%;
  min-height: 0;
}

.scrolldown-demo--scroll-page.scrolldown-demo--fs {
  height: min(60vh, 480px);
  min-height: min(60vh, 480px);
}

.scrolldown-page {
  height: 100%;
  min-height: 0;
}

.scrolldown-page-scroll {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
}

.scrolldown-page-hero {
  position: relative;
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  background: var(--bg-stage);
  color: var(--text);
}

.scrolldown-page-hero-title {
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

/* 教材 — 縦線が動いてスクロールを促す */
.scrolldown1 {
  position: absolute;
  left: 50%;
  bottom: 10px;
  height: 50px;
  transform: translateX(-50%);
}

.scrolldown1 span {
  position: absolute;
  left: -15px;
  top: -15px;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
}

.scrolldown1::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: 30px;
  margin-left: -0.5px;
  background: var(--text-muted);
  animation: scrolldownPathmove 1.4s ease-in-out infinite;
  opacity: 0;
}

/* 教材 — 丸が動いてスクロールを促す */
.scrolldown2 {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
}

.scrolldown2 span {
  position: absolute;
  left: 10px;
  bottom: 10px;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  -ms-writing-mode: tb-rl;
  -webkit-writing-mode: vertical-rl;
  writing-mode: vertical-rl;
}

.scrolldown2::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: -4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  animation:
    circlemove 1.6s ease-in-out infinite,
    cirlemovehide 1.6s ease-out infinite;
}

.scrolldown2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 2px;
  height: 50px;
  background: var(--text-muted);
}

@keyframes circlemove {
  0% {
    bottom: 45px;
  }
  100% {
    bottom: -5px;
  }
}

@keyframes cirlemovehide {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  80% {
    opacity: 0.9;
  }
  100% {
    opacity: 0;
  }
}

/* 教材 — マウスが動いてスクロールを促す */
.scrolldown3 {
  position: absolute;
  bottom: 10px;
  right: 50%;
  animation: mousemove 1.6s ease-in-out infinite;
}

.scrolldown3 span {
  position: absolute;
  left: -15px;
  bottom: 45px;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
}

.scrolldown3 span::after {
  content: "";
  position: absolute;
  top: 10px;
  left: 17px;
  width: 1px;
  height: 15px;
  background: var(--text-muted);
  animation: mousepathmove 1.4s linear infinite;
  opacity: 0;
}

.scrolldown3::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: -10px;
  width: 25px;
  height: 37px;
  border-radius: 10px;
  border: 1px solid var(--text-muted);
}

.scrolldown3::after {
  content: "";
  position: absolute;
  bottom: 26px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  border: 1px solid var(--text-muted);
}

@keyframes mousemove {
  0% {
    bottom: 10px;
  }
  50% {
    bottom: 5px;
  }
  100% {
    bottom: 10px;
  }
}

@keyframes mousepathmove {
  0% {
    height: 0;
    top: 10px;
    opacity: 0;
  }
  50% {
    height: 15px;
    opacity: 1;
  }
  100% {
    height: 0;
    top: 30px;
    opacity: 0;
  }
}

/* 教材 — 矢印が動いてスクロールを促す */
.scrolldown4 {
  position: absolute;
  bottom: 1%;
  right: 50%;
  animation: arrowmove 1s ease-in-out infinite;
}

.scrolldown4 span {
  position: absolute;
  left: -20px;
  bottom: 10px;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  -ms-writing-mode: tb-rl;
  -webkit-writing-mode: vertical-rl;
  writing-mode: vertical-rl;
}

.scrolldown4::before {
  content: "";
  position: absolute;
  bottom: 0;
  right: -6px;
  width: 1px;
  height: 20px;
  background: var(--text-muted);
  transform: skewX(-31deg);
}

.scrolldown4::after {
  content: "";
  position: absolute;
  bottom: 0;
  right: 0;
  width: 1px;
  height: 50px;
  background: var(--text-muted);
}

@keyframes arrowmove {
  0% {
    bottom: 1%;
  }
  50% {
    bottom: 3%;
  }
  100% {
    bottom: 1%;
  }
}

.scrolldown-page-section {
  min-height: 5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem;
  background: var(--surface-1);
  border-top: 1px solid var(--border);
  box-sizing: border-box;
}

.scrolldown-page-scroll--fs .scrolldown-page-section {
  min-height: 12rem;
}

.scrolldown-page-section-title {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
}

@keyframes scrolldownPathmove {
  0% {
    height: 0;
    top: 0;
    opacity: 0;
  }
  30% {
    height: 30px;
    opacity: 1;
  }
  100% {
    height: 0;
    top: 50px;
    opacity: 0;
  }
}

.scrolldown-fs-shell {
  position: fixed;
  inset: 0;
  z-index: 236;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: 1rem;
}

.scrolldown-fs-shell.is-open {
  display: flex;
}

.scrolldown-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  padding: 2.5rem 0 1rem;
}

.scrolldown-fs-mode-label {
  margin: 0;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

.scrolldown-fs-body {
  padding: 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  min-width: 0;
  box-sizing: border-box;
}

.scrolldown-fs-shell .fs-close {
  z-index: 237;
}

/* 5. スクロールでエリアの高さに合わせて伸びる（scrollgress） */
.scrolldown-page--area-grow {
  height: 100%;
  min-height: 0;
}

.scrolldown5-shell {
  position: relative;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.scrolldown5-shell--thumb {
  --scrolldown5-header-h: 1.75rem;
  --scrolldown5-bar-h: 5px;
}

.scrolldown5-shell--fs {
  --scrolldown5-header-h: 70px;
  --scrolldown5-bar-h: 5px;
}

.scrolldown5-header {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--scrolldown5-header-h);
  display: flex;
  align-items: center;
  padding: 0 0.65rem;
  box-sizing: border-box;
  background: var(--bg-stage);
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.scrolldown5-shell--fs .scrolldown5-header {
  font-size: 0.8125rem;
}

.scrolldown5-shell .scrollgress {
  z-index: 3;
  position: absolute;
  top: var(--scrolldown5-header-h) !important;
  left: 0;
  width: 100%;
  height: var(--scrolldown5-bar-h);
  background: transparent;
}

.scrolldown5-shell .scrollgress__progress {
  float: left;
  height: var(--scrolldown5-bar-h);
}

.scrolldown5-container {
  position: absolute;
  top: calc(var(--scrolldown5-header-h) + var(--scrolldown5-bar-h));
  left: 0;
  right: 0;
  bottom: 0;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
}

.scrolldown5-container-inner {
  min-height: 100%;
}

.scrolldown5-shell--thumb .scrolldown5-container .scrolldown-page-hero {
  min-height: calc(11.5rem - var(--scrolldown5-header-h) - var(--scrolldown5-bar-h));
  box-sizing: border-box;
}

.scrolldown5-shell--fs .scrolldown5-container .scrolldown-page-hero {
  min-height: calc(min(60vh, 480px) - var(--scrolldown5-header-h) - var(--scrolldown5-bar-h));
  box-sizing: border-box;
}

.scrolldown5-container .scrolldown-page-section {
  min-height: 12rem;
}

/* 6. スクロールでタイムラインの縦線が伸びる */
.scrolldown-page--timeline-grow .scrolldown-page-hero {
  min-height: 11.5rem;
}

.scrolldown-page--timeline-grow .timeline {
  max-width: 400px;
  width: 100%;
  margin: 50px auto;
  padding: 0 30px;
  list-style: none;
  box-sizing: border-box;
}

.scrolldown-page--timeline-grow .timeline li {
  position: relative;
  list-style: none;
  padding: 0 0 20px 0;
  min-height: 12rem;
  box-sizing: border-box;
}

.scrolldown-page--timeline-grow .timeline dl {
  margin: 0 0 20px 3em;
}

.scrolldown-page--timeline-grow .timeline dt {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text);
}

.scrolldown-page--timeline-grow .timeline dd {
  margin: 0;
}

.scrolldown-page--timeline-grow .border-line {
  position: absolute;
  left: 0.2em;
  top: 0;
  width: 2px;
  height: 0;
  background: #ccc;
}

.scrolldown-page--timeline-grow .timeline li::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 10px;
  height: 10px;
  background: #666;
  border-radius: 50%;
}

/* 7. 無限スクロール（Infinite Scroll） */
.scrolldown-page--infinite .scrolldown-page-scroll {
  container-type: size;
}

.scrolldown-page--infinite .scrolldown-page-hero {
  min-height: 100cqh;
}

.scrolldown-page--infinite .scrolldown7-infinitescroll {
  padding: 0;
}

.scrolldown-page--infinite .article-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.scrolldown-page--infinite .article-list li,
.scrolldown-page--infinite-click .article-list li {
  min-height: 100cqh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
  background: var(--surface-1);
  border-top: 1px solid var(--border);
  box-sizing: border-box;
}

.scrolldown-page--infinite #infscr-loading {
  width: 100%;
  text-align: center;
  margin: 20px auto;
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.scrolldown-page--infinite #infscr-loading img {
  width: 30px;
  display: block;
  margin: 0 auto 0.35rem;
}

/* 8. ボタンで無限スクロール */
.scrolldown-page--infinite-click .scrolldown-page-scroll {
  container-type: size;
}

.scrolldown-page--infinite-click .scrolldown-page-hero {
  min-height: 100cqh;
}

.scrolldown-page--infinite-click .scrolldown8-wrapper {
  padding: 0;
}

.scrolldown-page--infinite-click .article-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.scrolldown-page--infinite-click #infscr-loading {
  width: 100%;
  text-align: center;
  margin: 20px auto;
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.scrolldown-page--infinite-click #infscr-loading img {
  width: 30px;
  display: block;
  margin: 0 auto 0.35rem;
}

.scrolldown-page--infinite-click .navigation {
  display: block;
  width: 100%;
  margin: 0;
}

.scrolldown-page--infinite-click .navigation a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  box-sizing: border-box;
  padding: 0.5rem 0.75rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 600;
  border-top: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.2s ease;
}

.scrolldown-page--infinite-click .navigation a:hover {
  background: var(--accent-hover);
}

/* ----- Ch.9-3 / 9-4 ツールチップ・ニュースティッカー（3パターン） ----- */
.tt-stage {
  padding: 0.1rem 0;
  overflow: visible;
}

.tt-patterns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: 0.85rem;
}

@media (max-width: 900px) {
  .tt-patterns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .tt-patterns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.tt-pattern {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  height: 100%;
  padding: 0.85rem 1rem 0.65rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.tt-pattern-label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
}

.tt-fs-open {
  flex: 0 0 auto;
  width: 100%;
  min-height: 2.125rem;
  padding: 0.45rem 0.75rem;
  justify-content: center;
}

.tt-pattern-demo {
  flex: 1 1 auto;
  display: flex;
  min-width: 0;
  min-height: 7.5rem;
  overflow: visible;
}

.tt-pattern-speed-spacer {
  flex: 0 0 auto;
  min-height: 3.1rem;
}

.tt-demo {
  flex: 1 1 auto;
  width: 100%;
  min-height: 7.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-stage);
  overflow: visible;
}

.tt-demo--thumb {
  padding: 0.75rem 0.5rem;
}

.tt-demo--fs {
  padding: 1.5rem 1rem;
  min-height: min(40vh, 320px);
}

.tt-demo--ticker {
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.tt-demo--thumb.tt-demo--ticker {
  min-height: 7.5rem;
  padding: 0.5rem;
}

.tt-demo--thumb[data-tt-demo="ticker-horizontal"] .ticker-wrap--horizontal {
  width: 100%;
  flex: 0 0 auto;
}

.tt-demo--fs.tt-demo--ticker {
  min-height: min(40vh, 320px);
}

.tt-demo--ticker .ticker-wrap {
  width: 100%;
}

.tt-ticker-speed-controls {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-height: 3.1rem;
}

.tt-ticker-speed-label {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 0.35rem 0.5rem;
  align-items: center;
  margin: 0;
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.tt-ticker-speed-text {
  grid-column: 1 / -1;
  font-weight: 600;
  color: var(--text);
}

.tt-ticker-speed-text small {
  font-weight: 500;
  color: var(--text-muted);
}

.tt-ticker-speed-slider {
  width: 100%;
  accent-color: var(--accent);
}

.tt-ticker-speed-val {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

.tt-ticker-speed-controls--fs {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 0.25rem;
}

.tt-ticker-speed-controls--fs .tt-ticker-speed-label {
  font-size: 0.8125rem;
}

.tt-tooltip-stage {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: center;
  padding: 0.5rem;
  overflow: visible;
}

.tt-demo--fs .tt-tooltip-stage {
  gap: 2rem;
  padding: 1rem;
}

.tooltip-wrap {
  position: relative;
  display: inline-block;
}

.tooltip-bubble {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  padding: 0.45rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  box-shadow: var(--shadow);
  pointer-events: none;
  z-index: 20;
}

.tooltip-bubble::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--border);
}

.tooltip-wrap:hover .tooltip-bubble,
.tooltip-wrap:focus-within .tooltip-bubble,
.tooltip-wrap.is-visible .tooltip-bubble {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ----- ニュースティッカー（横・縦） ----- */
.ticker-wrap {
  overflow: hidden;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.ticker-wrap--horizontal {
  padding: 0.55rem 0;
}

.tt-demo--fs .ticker-wrap--horizontal {
  padding: 0.75rem 0;
}

.ticker-track--horizontal {
  display: flex;
  gap: 2rem;
  width: max-content;
  animation: ttTickerScrollX var(--tt-ticker-duration, 20s) linear infinite;
}

.ticker-wrap--horizontal:hover .ticker-track--horizontal {
  animation-play-state: paused;
}

.ticker-item {
  font-size: 0.875rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.ticker-item strong {
  color: var(--accent);
  margin-right: 0.5rem;
}

@keyframes ttTickerScrollX {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* 縦ティッカー（bxSlider・教材コード） */
.tt-demo[data-tt-demo="ticker-vertical"] .slider-wrap {
  width: 100%;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.tt-demo--thumb[data-tt-demo="ticker-vertical"] .slider-wrap {
  width: 100%;
  height: auto;
  flex: 0 0 auto;
}

.tt-demo--fs[data-tt-demo="ticker-vertical"] .slider-wrap {
  height: auto;
  max-width: 720px;
}

.tt-demo[data-tt-demo="ticker-vertical"] .bx-wrapper {
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 auto !important;
  box-shadow: none !important;
  border: none !important;
  background: transparent !important;
}

.tt-demo[data-tt-demo="ticker-vertical"] .bx-controls,
.tt-demo[data-tt-demo="ticker-vertical"] .bx-pager {
  display: none !important;
}

.tt-demo[data-tt-demo="ticker-vertical"] .slider {
  margin: 0;
  padding: 0;
  list-style: none;
}

.tt-demo[data-tt-demo="ticker-vertical"] .slider li {
  width: 100% !important;
}

.tt-demo[data-tt-demo="ticker-vertical"] .slider a {
  display: block;
  background: var(--bg-card);
  padding: 0.65rem 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.6875rem;
  line-height: 1.45;
}

.tt-demo--fs[data-tt-demo="ticker-vertical"] .slider a {
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
}

.tt-demo[data-tt-demo="ticker-vertical"] .slider span {
  display: inline-block;
  font-size: 0.625rem;
  margin-right: 0.5rem;
  color: var(--text-muted);
}

.tt-demo--fs[data-tt-demo="ticker-vertical"] .slider span {
  font-size: 0.8rem;
  margin-right: 0.65rem;
  color: var(--accent);
  font-weight: 600;
}

.tt-demo--thumb .ticker-wrap--horizontal {
  width: 100%;
}

.tt-demo--thumb .ticker-item {
  font-size: 0.6875rem;
}

.tt-demo--fs .ticker-wrap--horizontal {
  width: 100%;
  max-width: 720px;
}

.tt-demo--fs .ticker-item {
  font-size: 0.9375rem;
}

.tt-fs-shell {
  position: fixed;
  inset: 0;
  z-index: 237;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: 1rem;
}

.tt-fs-shell.is-open {
  display: flex;
}

.tt-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 2.5rem 0 0.5rem;
}

.tt-fs-mode-label {
  margin: 0;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

.tt-fs-body {
  padding: 1rem 1rem 0.75rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 0;
  box-sizing: border-box;
  overflow: visible;
}

.tt-fs-shell .fs-close {
  z-index: 238;
}

.tt-fs-body .tt-demo--fs {
  width: 100%;
}

/* ----- Ch.9-5 グラフ（7パターン） ----- */
.graph-stage {
  padding: 1rem 1.25rem 1.25rem;
}

.graph-patterns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  align-items: stretch;
}

@media (max-width: 900px) {
  .graph-patterns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .graph-patterns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.graph-pattern {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  height: 100%;
  padding: 0.85rem 1rem 0.65rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.graph-pattern-label {
  margin: 0;
  min-height: 2.6em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
}

.graph-pattern-demo {
  flex: 1 1 auto;
  display: flex;
  min-height: 8.5rem;
  min-width: 0;
}

.graph-fs-open {
  flex: 0 0 auto;
  width: 100%;
  min-height: 2.125rem;
  padding: 0.45rem 0.75rem;
  justify-content: center;
}

.graph-chart-demo {
  flex: 1 1 auto;
  width: 100%;
  min-height: 8.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-stage);
  overflow: hidden;
}

.graph-chart-demo--fs {
  min-height: min(42vh, 320px);
  padding: 1.25rem 1rem;
}

/* カウントアップ・ダウン */
.graph-count-stage {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.graph-chart-demo--fs .graph-count-stage {
  gap: 2rem 3rem;
}

.graph-count-item {
  text-align: center;
}

.graph-count-value {
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.1rem;
}

.graph-count-num {
  display: inline-block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.graph-chart-demo--fs .graph-count-num {
  font-size: 3rem;
}

.graph-count-suffix {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}

.graph-chart-demo--fs .graph-count-suffix {
  font-size: 1.75rem;
}

.graph-count-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.graph-chart-demo--fs .graph-count-label {
  font-size: 0.875rem;
}

/* 棒グラフ（縦） */
.graph-bars-v {
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  gap: 0.5rem;
  width: 100%;
  height: 100%;
  min-height: 7rem;
  padding: 0 0.25rem;
}

.graph-chart-demo--fs .graph-bars-v {
  min-height: 12rem;
  max-width: 520px;
  margin: 0 auto;
}

.graph-bar-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  gap: 0.35rem;
  height: 100%;
  max-width: 52px;
}

.graph-bar {
  width: 100%;
  max-width: 44px;
  height: var(--bar-h, 80px);
  background: linear-gradient(180deg, var(--accent), var(--accent-hover));
  border-radius: 6px 6px 0 0;
  transform: scaleY(0);
  transform-origin: bottom center;
}

.graph-chart-demo.is-animated .graph-bar-wrap .graph-bar {
  animation: graphBarGrow 1s cubic-bezier(0.34, 1.4, 0.64, 1) forwards;
  animation-delay: var(--bar-delay, 0s);
}

@keyframes graphBarGrow {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

.graph-bar-label {
  font-size: 0.625rem;
  color: var(--text-muted);
}

.graph-chart-demo--fs .graph-bar-label {
  font-size: 0.75rem;
}

/* 棒グラフ（横・複数） */
.graph-bars-h {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  width: 100%;
  max-width: 100%;
}

.graph-chart-demo--fs .graph-bars-h {
  max-width: 560px;
  gap: 0.85rem;
}

.graph-hbar-row {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  align-items: center;
  gap: 0.5rem;
}

.graph-hbar-label {
  font-size: 0.625rem;
  color: var(--text-muted);
  text-align: right;
}

.graph-chart-demo--fs .graph-hbar-label {
  font-size: 0.8125rem;
}

.graph-hbar-track {
  height: 0.65rem;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}

.graph-chart-demo--fs .graph-hbar-track {
  height: 0.85rem;
}

.graph-hbar {
  height: 100%;
  width: var(--hbar-w, 50%);
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 999px;
  transform: scaleX(0);
  transform-origin: left center;
}

.graph-chart-demo.is-animated .graph-hbar-row .graph-hbar {
  animation: graphHBarGrow 0.9s cubic-bezier(0.34, 1.4, 0.64, 1) forwards;
  animation-delay: var(--hbar-delay, 0s);
}

@keyframes graphHBarGrow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* 折れ線グラフ（Chart.js・1本） */
.graph-line-chart-wrap {
  width: 100%;
  min-height: 7rem;
  position: relative;
}

.graph-chart-demo--fs .graph-line-chart-wrap {
  min-height: 16rem;
  max-width: 640px;
  margin: 0 auto;
}

.graph-line-chart-wrap--multi {
  min-height: 8.5rem;
}

.graph-chart-demo--fs .graph-line-chart-wrap--multi {
  min-height: 20rem;
}

.graph-line-canvas {
  display: block;
  width: 100% !important;
}

/* 折れ線グラフ（SVG・複数） */
.graph-line-wrap {
  width: 100%;
  max-width: 100%;
}

.graph-chart-demo--fs .graph-line-wrap {
  max-width: 640px;
}

.graph-line-svg {
  width: 100%;
  height: auto;
  display: block;
}

.graph-line-grid {
  stroke: var(--border);
  stroke-width: 0.5;
  opacity: 0.65;
}

.graph-line-path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 320;
  stroke-dashoffset: 320;
}

.graph-line-path--multi {
  stroke: var(--line-color, var(--accent));
  stroke-width: 2;
}

.graph-chart-demo.is-animated .graph-line-path {
  animation: graphLineDraw 1.2s ease forwards;
}

.graph-chart-demo.is-animated .graph-line-path--multi {
  animation-delay: var(--line-delay, 0s);
}

@keyframes graphLineDraw {
  to { stroke-dashoffset: 0; }
}

/* 円グラフ・ドーナツ */
.graph-pie-demo {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1rem;
  width: 100%;
}

.graph-chart-demo--fs .graph-pie-demo {
  gap: 1.5rem 2rem;
}

.graph-pie-chart {
  position: relative;
  width: 108px;
  height: 108px;
  flex-shrink: 0;
}

.graph-chart-demo--fs .graph-pie-chart {
  width: 180px;
  height: 180px;
}

.graph-pie-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.graph-pie-track {
  stroke: var(--surface-2);
}

.graph-pie-slice {
  transition: none;
}

.graph-pie-center {
  position: absolute;
  inset: 22%;
  border-radius: 50%;
  background: var(--bg-stage);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.graph-pie-center--donut {
  inset: 34%;
}

.graph-chart-demo--fs .graph-pie-center {
  font-size: 0.8125rem;
}

.graph-pie-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.graph-pie-legend li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.625rem;
  color: var(--text-muted);
}

.graph-chart-demo--fs .graph-pie-legend li {
  font-size: 0.8125rem;
}

.graph-pie-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c, var(--accent));
  flex-shrink: 0;
}

/* 全画面グラフ */
.graph-fs-shell {
  position: fixed;
  inset: 0;
  z-index: 236;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: 1rem;
}

.graph-fs-shell.is-open {
  display: flex;
}

.graph-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 2.5rem 0 0.5rem;
}

.graph-fs-mode-label {
  margin: 0;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
}

.graph-fs-body {
  padding: 1rem 1rem 0.75rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 0;
  box-sizing: border-box;
}

.graph-fs-shell .fs-close {
  z-index: 237;
}

.graph-fs-body .graph-chart-demo--fs {
  width: 100%;
}

/* ----- Ch.4-2 画面遷移（方向別） ----- */
.transition-page.exit-top { animation: exitTop calc(0.45s / var(--local-speed, 1)) ease forwards; }
.transition-page.enter-top { animation: enterTop calc(0.45s / var(--local-speed, 1)) ease forwards; }
.transition-page.exit-bottom { animation: exitBottom calc(0.45s / var(--local-speed, 1)) ease forwards; }
.transition-page.enter-bottom { animation: enterBottom calc(0.45s / var(--local-speed, 1)) ease forwards; }
.transition-page.exit-left { animation: exitLeft calc(0.45s / var(--local-speed, 1)) ease forwards; }
.transition-page.enter-left { animation: enterLeft calc(0.45s / var(--local-speed, 1)) ease forwards; }
.transition-page.exit-right { animation: exitRight calc(0.45s / var(--local-speed, 1)) ease forwards; }
.transition-page.enter-right { animation: enterRight calc(0.45s / var(--local-speed, 1)) ease forwards; }

@keyframes exitTop { to { transform: translateY(calc(-100% * var(--local-intensity, 1))); opacity: 0; } }
@keyframes enterTop { from { transform: translateY(calc(-100% * var(--local-intensity, 1))); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes exitBottom { to { transform: translateY(calc(100% * var(--local-intensity, 1))); opacity: 0; } }
@keyframes enterBottom { from { transform: translateY(calc(100% * var(--local-intensity, 1))); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes exitLeft { to { transform: translateX(calc(-100% * var(--local-intensity, 1))); opacity: 0; } }
@keyframes enterLeft { from { transform: translateX(calc(-100% * var(--local-intensity, 1))); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes exitRight { to { transform: translateX(calc(100% * var(--local-intensity, 1))); opacity: 0; } }
@keyframes enterRight { from { transform: translateX(calc(100% * var(--local-intensity, 1))); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ----- Ch.5-4 タブメニュー ----- */
#ch5-tabs .demo-stage,
.tab-stage {
  background: var(--gnav-inset, var(--bg-stage));
}

.tab-patterns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

@media (max-width: 900px) {
  .tab-patterns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .tab-patterns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.tab-pattern-card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  justify-items: stretch;
  gap: 0.5rem;
  margin: 0;
  padding: 0.75rem 0.65rem 0.85rem;
  background: var(--gnav-raised, var(--bg-card));
  border: 1px solid var(--gnav-border-strong, var(--border));
  border-radius: var(--radius);
}

.tab-pattern-label {
  margin: 0;
  min-height: 2.6em;
  font-size: 0.625rem;
  line-height: 1.35;
  text-align: center;
  color: var(--text-muted);
}

/* サムネ共通：配置のみ（外枠なし・枠はパターンごとに必要な所だけ） */
.tab-pattern-thumb {
  padding: 0;
  border: none;
  border-radius: 0;
  overflow: hidden;
  background: var(--gnav-inset, var(--bg-stage));
}

.tab-pattern-thumb .tab-list {
  display: flex;
  gap: 0;
  margin: 0;
  padding: 0;
  border-bottom: none;
}

.tab-pattern-thumb .tab-panels {
  margin: 0;
  border: none;
  background: transparent;
}

.tab-pattern-thumb .tab-btn {
  flex: 1;
  min-width: 0;
  margin: 0;
  padding: 0.4rem 0.2rem;
  font-size: 0.625rem;
  text-align: center;
}

.tab-pattern-thumb [data-tab-root] {
  width: 100%;
  text-align: center;
}

.tab-pattern-thumb .tab-panel p {
  margin: 0;
  padding: 0.35rem 0.45rem;
  font-size: 0.625rem;
  line-height: 1.45;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab-pattern-thumb .tabs--underline-slide .tab-list {
  position: relative;
}

/* シンプル／フェード／スライド／下線：タブ行の下線だけ */
.tab-pattern-thumb .tabs--plain .tab-list,
.tab-pattern-thumb .tabs--fade .tab-list,
.tab-pattern-thumb .tabs--slide .tab-list,
.tab-pattern-thumb .tabs--underline .tab-list,
.tab-pattern-thumb .tabs--underline-slide .tab-list {
  border-bottom: 1px solid var(--border);
}

/* 背景色：タブ行の下線のみ（パネル枠なし） */
.tab-pattern-thumb .tabs--bg .tab-list {
  border-bottom: 1px solid var(--border);
}

.tab-pattern-thumb .tabs--bg .tab-btn {
  border-color: transparent;
}

.tab-pattern-thumb .tabs--bg .tab-btn.active {
  border-color: var(--accent);
}

/* 角丸：タブ行の下線＋選択タブだけ上辺の枠 */
.tab-pattern-thumb .tabs--radius .tab-list {
  border-bottom: 1px solid var(--border);
}

.tab-pattern-thumb .tabs--radius .tab-btn {
  border-color: transparent;
}

.tab-pattern-thumb .tabs--radius .tab-btn.active {
  border-color: var(--border);
}

/* 枠線タブだけ：セル枠＋下パネル枠 */
.tab-pattern-thumb .tabs--border .tab-list {
  border-bottom: 1px solid var(--border);
}

.tab-pattern-thumb .tabs--border .tab-btn {
  border-radius: 0;
  border: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--gnav-raised, var(--bg-card));
}

.tab-pattern-thumb .tabs--border .tab-btn + .tab-btn {
  margin-left: -1px;
}

.tab-pattern-thumb .tabs--border .tab-btn.active {
  margin-bottom: -1px;
  border-color: var(--accent);
  border-bottom: 1px solid var(--gnav-inset, var(--bg-stage));
  background: var(--gnav-inset, var(--bg-stage));
  color: var(--text);
  z-index: 1;
}

.tab-pattern-thumb .tabs--border .tab-panels {
  padding: 0;
  border: 1px solid var(--border);
  border-top: none;
  background: var(--gnav-inset, var(--bg-stage));
}

/* 背景色・角丸：サムネはタブ均等＋各パターンの見た目はそのまま */
.tab-pattern-thumb .tabs--bg .tab-list,
.tab-pattern-thumb .tabs--radius .tab-list {
  gap: 0;
  padding: 0;
  align-items: flex-end;
}

.tab-pattern-thumb .tabs--bg .tab-btn.active,
.tab-pattern-thumb .tabs--radius .tab-btn.active {
  padding-bottom: calc(0.4rem + 1px);
}

.tab-pattern-thumb .tabs--bg .tab-panels,
.tab-pattern-thumb .tabs--radius .tab-panels {
  border: none;
  border-radius: 0;
  padding: 0;
  background: transparent;
}

.tabs--fade .tab-panel.active {
  animation: tabFade 0.35s ease;
}

.tabs--slide .tab-panels {
  overflow: hidden;
}

.tabs--slide .tab-panel.active {
  animation: tabSlideIn 0.35s ease;
}

@keyframes tabFade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes tabSlideIn {
  from { opacity: 0; transform: translateX(12px); }
  to { opacity: 1; transform: translateX(0); }
}

.tabs--underline .tab-list,
.tabs--underline-slide .tab-list {
  border-bottom: 1px solid var(--border);
}

.tabs--underline .tab-btn::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.3s;
}

.tabs--underline .tab-btn.active::after {
  transform: scaleX(1);
}

.tabs--underline-slide .tab-list {
  position: relative;
}

.tabs--underline-slide .tab-indicator {
  position: absolute;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--accent);
  transition: left 0.3s ease, width 0.3s ease;
  pointer-events: none;
}

.tabs--underline-slide .tab-btn::after {
  display: none;
}

/* 背景色がつく：選択タブだけに背景色・下のパネルと一体 */
.tabs--bg {
  --tab-surface: var(--gnav-inset, var(--bg-stage));
}

.tab-fs-stage .tabs--bg {
  --tab-surface: var(--bg-card);
}

.tabs--bg .tab-list {
  gap: 0.2rem;
  align-items: flex-end;
  padding: 0 0.15rem;
  border-bottom: 1px solid var(--border);
  background: transparent;
}

.tabs--bg .tab-btn {
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 0;
  background: transparent;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
}

.tabs--bg .tab-btn.active {
  margin-bottom: -1px;
  border-color: var(--accent);
  border-bottom: 1px solid var(--tab-surface);
  background: var(--accent);
  color: #fff;
}

.tab-fs-stage .tabs--bg .tab-btn.active {
  padding-bottom: calc(0.75rem + 1px);
}

.tabs--bg .tab-panels {
  padding: 0.55rem 0.65rem 0.45rem;
  border: 1px solid var(--border);
  border-top: none;
  background: var(--tab-surface);
}

.tab-fs-stage .tabs--bg .tab-panels {
  padding: 0.85rem 1rem 0.75rem;
}

/* 角丸タブ：上辺だけ丸いタブ（書籍どおり・ピル型ではない） */
.tabs--radius {
  --tab-radius-surface: var(--gnav-inset, var(--bg-stage));
}

.tab-fs-stage .tabs--radius {
  --tab-radius-surface: var(--bg-card);
}

.tabs--radius .tab-list {
  gap: 0.2rem;
  align-items: flex-end;
  padding: 0 0.15rem;
  border-bottom: 1px solid var(--border);
}

.tabs--radius .tab-btn {
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: calc(var(--radius) - 2px) calc(var(--radius) - 2px) 0 0;
  background: transparent;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
}

.tabs--radius .tab-btn.active {
  margin-bottom: -1px;
  padding-bottom: calc(0.75rem + 1px);
  border-color: var(--border);
  border-bottom: 1px solid var(--tab-radius-surface);
  background: var(--tab-radius-surface);
  color: var(--text);
}

.tabs--radius .tab-panels {
  padding: 0.55rem 0.65rem 0.45rem;
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 calc(var(--radius) - 2px) calc(var(--radius) - 2px);
  background: var(--tab-radius-surface);
}

.tab-fs-stage .tabs--radius .tab-panels {
  padding: 0.85rem 1rem 0.75rem;
}

/* 枠線タブ：各タブに枠線・選択タブの下でパネルと接続（セグメント型ボタンではない） */
.tabs--border {
  --tab-surface: var(--gnav-inset, var(--bg-stage));
}

.tab-fs-stage .tabs--border {
  --tab-surface: var(--bg-card);
}

.tabs--border .tab-list {
  gap: 0;
  align-items: stretch;
  padding: 0;
  margin: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  overflow: hidden;
}

.tabs--border .tab-btn {
  flex: 1;
  margin: 0;
  border: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: var(--gnav-raised, var(--bg-card));
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.tabs--border .tab-btn + .tab-btn {
  margin-left: -1px;
}

.tabs--border .tab-btn.active {
  margin-bottom: -1px;
  border-bottom: 1px solid var(--tab-surface);
  background: var(--tab-surface);
  color: var(--text);
  z-index: 1;
}

.tab-fs-stage .tabs--border .tab-btn.active {
  padding-bottom: calc(0.75rem + 1px);
}

.tabs--border .tab-panels {
  margin: 0;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0;
  background: var(--tab-surface);
}

.tab-fs-stage .tabs--border .tab-panels {
  padding: 0.75rem 1rem;
}

.tab-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 180;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
}

.tab-fs-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.tab-fs-layout {
  position: relative;
  width: min(640px, 100%);
  margin-inline: auto;
  padding: 1.5rem 1.75rem 1.25rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
  text-align: center;
}

.tab-fs-stage {
  display: flex;
  justify-content: center;
  width: 100%;
}

.tab-fs-stage [data-tab-root] {
  width: 100%;
  max-width: 32rem;
  margin-inline: auto;
  text-align: center;
}

.tab-fs-layout .tab-fs-close {
  top: 0.65rem;
  right: 0.65rem;
  width: 40px;
  height: 40px;
  font-size: 1.35rem;
}

.tab-fs-mode-label {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
}

.tab-fs-stage .tab-btn {
  padding: 0.75rem 1.1rem;
  font-size: 0.875rem;
}

.tab-fs-stage .tab-panel p {
  font-size: 0.875rem;
  text-align: center;
}

.tab-fs-stage .tab-list {
  justify-content: center;
}

.tab-fs-hint {
  margin: 1rem 0 0;
  font-size: 0.6875rem;
  color: var(--text-muted);
  text-align: center;
}

/* ===================================================================
   モーダルウィンドウ (9-6) — サムネグリッド
   =================================================================== */

.modal-patterns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.85rem;
}

.modal-box {
  display: grid;
  grid-template-rows: auto auto auto auto;
  gap: 0.55rem;
  align-items: center;
  text-align: center;
  padding: 0.85rem 1rem 1rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  cursor: pointer;
}

.modal-box > p {
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.4;
}

.modal-box > p:first-of-type {
  font-weight: 500;
  color: var(--text);
}

.modal-box .modal-fs-open {
  width: 100%;
  justify-content: center;
}

.modal-box-foot {
  align-self: start;
}

/* サムネ枠（クリック可能） */
.modal-box-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-stage);
  border: 1px solid var(--border);
  transition: opacity 0.2s, outline 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-box-thumb.is-active { outline: 2px solid var(--accent); }

/* モックページ */
.mbt-page {
  position: absolute;
  inset: 0;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
}

.mbt-bar {
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  width: 70%;
}
.mbt-bar--title  { width: 40%; height: 5px; background: var(--text-muted); opacity: 0.6; }
.mbt-bar--body   { width: 85%; }
.mbt-bar--heading{ width: 55%; height: 4px; background: var(--text); opacity: 0.7; }

.mbt-btn {
  margin-top: 3px;
  width: 36%;
  height: 8px;
  border-radius: 3px;
  background: var(--accent);
  opacity: 0.75;
}
.mbt-btn--sm { width: 28%; height: 6px; margin-top: 2px; }

/* ミニデモ用トリガーボタン（パターン1・2） */
button.mbt-scene-trigger {
  position: relative;
  z-index: 1;
  padding: 6px 16px;
  font-size: 0.7rem;
  line-height: 1.5;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s, transform 0.1s, visibility 0.2s;
}
button.mbt-scene-trigger:hover { opacity: 0.85; }
button.mbt-scene-trigger:active { transform: scale(0.97); }

[data-mini-mode="text"] > button.mbt-scene-trigger,
[data-mini-mode="video-auto"] > button.mbt-scene-trigger {
  padding: 7px 28px;
  min-width: 7.5rem;
}

/* オーバーレイ表示中はトリガーボタンを隠す */
.modal-box-thumb.is-active > button.mbt-scene-trigger {
  visibility: hidden;
  opacity: 0;
}

/* オーバーレイ内の閉じるボタン */
.mbt-overlay-close {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 18px;
  height: 18px;
  font-size: 0.75rem;
  line-height: 1;
  background: rgba(255,255,255,0.18);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
  z-index: 2;
}
.mbt-overlay-close:hover { background: rgba(255,255,255,0.35); }

/* ミニデモ用クリッカブル項目 共通 */
.mbt-scene-trigger { cursor: pointer; }

/* ===== パターン3（ライトボックス）ページレイアウト ===== */
.mbt-lb-page {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
  align-items: stretch;
  width: 72%;
}

[data-mini-mode="lightbox"].is-lb-open .mbt-lb-page {
  display: none !important;
}

/* 動画サムネ行 */
.mbt-lb-video-thumb {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 6px;
  background: #111;
  border-radius: 2px;
}
.mbt-lb-video-thumb:hover { opacity: 0.8; }
.mbt-lb-bar {
  height: 3px;
  flex: 1;
  background: rgba(255,255,255,0.3);
  border-radius: 1px;
}

/* 画像グリッド行 */
.mbt-lb-images {
  display: flex;
  gap: 2px;
}
.mbt-lb-images .mbt-img-thumb {
  flex: 1;
  width: auto;
  aspect-ratio: 1;
}
.mbt-lb-images .mbt-img-thumb:hover { opacity: 0.75; outline: 1px solid var(--accent); }

/* テキスト行 */
.mbt-lb-text {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 5px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 2px;
}
.mbt-lb-text:hover { opacity: 0.75; outline: 1px solid var(--accent); }
.mbt-lb-date {
  width: 22%;
  height: 3px;
  background: var(--accent);
  border-radius: 1px;
  opacity: 0.6;
  flex-shrink: 0;
}

/* オーバーレイ: デフォルトは透明、is-active で表示 */
.mbt-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: background 0.45s ease;
  pointer-events: none;
}
.modal-box-thumb.is-active .mbt-overlay {
  background: rgba(0,0,0,0.45);
  pointer-events: auto;
}
.modal-box-thumb.is-active .mbt-overlay.mbt-overlay--dark {
  background: rgba(0,0,0,0.78);
}

/* ダイアログ枠（共通ベース） */
.mbt-dialog {
  background: var(--bg-card);
  border-radius: 4px;
  padding: 7px 9px;
  width: 62%;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.mbt-dialog--text { width: 70%; }

/* ===== パターン別アニメーション（全画面と同じ動き） ===== */

/* パターン1（テキスト）: scale + translateY + elastic bounce — modal-fs-dialog と同じ */
[data-mini-mode="text"] .mbt-dialog {
  transform: scale(0.9) translateY(8px);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
              opacity 0.25s ease;
}
[data-mini-mode="text"].is-active .mbt-dialog {
  transform: scale(1) translateY(0);
  opacity: 1;
}

/* パターン2（動画自動）: translateY + opacity + 遅延 — modal-fs-video-box と同じ */
.mbt-mini-video-box {
  width: 78%;
  border-radius: 4px;
  overflow: hidden;
  transform: translateY(12px);
  opacity: 0;
  transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.15s,
              opacity 0.45s ease 0.15s;
}
[data-mini-mode="video-auto"].is-active .mbt-mini-video-box {
  transform: translateY(0);
  opacity: 1;
}
.mbt-mini-video {
  width: 100%;
  display: block;
}

/* ===== パターン3（ライトボックス）オーバーレイ ===== */
/* 表示/非表示は JS の display 制御。オーバーレイ全域はクリック透過 */
[data-mini-mode="lightbox"] .mbt-overlay,
[data-mini-mode="lightbox"] .mbt-overlay * {
  pointer-events: none !important;
}
[data-mini-mode="lightbox"] .mbt-overlay {
  z-index: 2;
  background: rgba(0,0,0,0.82) !important;
  transition: none !important;
}
[data-mini-mode="lightbox"] .mbt-overlay[data-lb-overlay="text"] {
  background: rgba(0,0,0,0.5) !important;
}
[data-mini-mode="lightbox"] .mbt-overlay-close {
  pointer-events: auto !important;
}

/* 動画: translateY + opacity — modal-fs-video-box と同じ */
[data-mini-mode="lightbox"] .mbt-mini-video-box {
  transform: translateY(12px);
  opacity: 0;
  transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.05s,
              opacity 0.45s ease 0.05s;
}
[data-mini-mode="lightbox"] .mbt-overlay.is-open .mbt-mini-video-box {
  transform: translateY(0);
  opacity: 1;
}

/* 画像表示: scale — modal-fs-image-dialog と同じ */
.mbt-mini-image-display {
  width: 58%;
  aspect-ratio: 4/3;
  border-radius: 3px;
  transform: scale(0.92);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
              opacity 0.3s ease;
}
[data-mini-mode="lightbox"] .mbt-overlay.is-open .mbt-mini-image-display {
  transform: scale(1);
  opacity: 1;
}

/* テキストダイアログ: elastic scale — modal-fs-dialog と同じ */
[data-mini-mode="lightbox"] .mbt-overlay .mbt-dialog {
  transform: scale(0.9) translateY(8px);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
              opacity 0.25s ease;
}
[data-mini-mode="lightbox"] .mbt-overlay.is-open .mbt-dialog {
  transform: scale(1) translateY(0);
  opacity: 1;
}

/* 動画ブロック */
.mbt-video-block {
  width: 80%;
  aspect-ratio: 16/9;
  background: #111;
  border-radius: 3px;
  margin-bottom: 4px;
}

.mbt-video-large {
  width: 70%;
  aspect-ratio: 16/9;
  background: #111;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mbt-play-lg { font-size: 1.2rem; color: rgba(255,255,255,0.75); }
.mbt-play-sm { font-size: 0.55rem; color: var(--accent); }

/* リストアイテムサムネ */
.mbt-page--items {
  gap: 3px;
  padding: 10px;
}

.mbt-link-item {
  display: flex;
  align-items: center;
  gap: 4px;
  width: 100%;
  padding: 3px 5px;
  background: var(--surface-1);
  border-radius: 3px;
  border: 1px solid var(--border);
}

.mbt-link-item--text { gap: 0; padding: 3px 6px; }

.mbt-link-label {
  height: 3px;
  flex: 1;
  background: var(--border);
  border-radius: 2px;
}

.mbt-link-label--dark { background: var(--text-muted); opacity: 0.4; }

/* ギャラリーサムネ */
.mbt-page--gallery {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 3px;
  padding: 8px;
  align-items: flex-start;
  align-content: flex-start;
}

.mbt-img-thumb {
  width: calc(33% - 2px);
  aspect-ratio: 1;
  border-radius: 3px;
}

.mbt-img-1 { background: hsl(200 60% 55% / 0.85); }
.mbt-img-2 { background: hsl(30  70% 60% / 0.85); }
.mbt-img-3 { background: hsl(140 50% 50% / 0.85); }

.mbt-img-large {
  width: 70%;
  aspect-ratio: 4/3;
  border-radius: 4px;
}

/* ===================================================================
   モーダルウィンドウ (9-6) — 全画面シェル（他セクションと同じフレーム構造）
   =================================================================== */

/* シェル: Ch.9 他セクション（pagtop / accordion / tt-fs）と同じ */
.modal-fs-shell {
  position: fixed;
  inset: 0;
  z-index: 237;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: 1rem;
}

.modal-fs-shell.is-open {
  display: flex;
}

.modal-fs-shell .fs-close {
  z-index: 238;
}

/* レイアウト: accordion-fs-layout / scrolldown-fs-layout と同じ */
.modal-fs-layout {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 2.5rem 0 1rem;
}

.modal-fs-mode-label {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}

/* フレーム: accordion-fs-body / tt-fs-body と同じ */
.modal-fs-body {
  position: relative;
  padding: 1rem 1rem 0.75rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  min-width: 0;
  box-sizing: border-box;
  overflow: hidden;
}

/* シーン（表示中のみフレーム内に展開） */
.modal-fs-scene[hidden] {
  display: none !important;
}

.modal-fs-scene:not([hidden]):not(.modal-fs-scene--scroll) {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: min(52vh, 420px);
}

.modal-fs-scene--scroll:not([hidden]) {
  display: block;
  width: 100%;
  min-height: 0;
}

/* モックページ（フレーム内のページ表現） */
.modal-fs-page {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.5rem 2rem;
  text-align: center;
  min-height: min(48vh, 380px);
}

.modal-fs-page-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin: 0;
  text-transform: uppercase;
}

.modal-fs-page-body {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
  max-width: 340px;
  line-height: 1.6;
}

.modal-fs-page .btn-primary {
  border-radius: 8px;
  padding: 0.85rem 2.5rem;
  font-size: 1.0625rem;
  min-width: 11rem;
}

/* ライトボックス用ページ */
.modal-fs-page--lb {
  justify-content: flex-start;
  align-items: stretch;
  padding: 0.25rem 0 0;
  gap: 0;
  min-height: 0;
  height: auto;
}

/* 内側オーバーレイ（フレーム内に収まる・position:relative の modal-fs-body 基準） */
.modal-fs-inner-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  z-index: 20;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.45s ease, visibility 0.45s ease;
}

.modal-fs-inner-overlay--dark { background: rgba(0,0,0,0.85); }

.modal-fs-inner-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

/* ダイアログ（テキスト / テキストライトボックス） */
.modal-fs-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  width: 100%;
  max-width: 380px;
  position: relative;
  transform: scale(0.9) translateY(16px);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-fs-inner-overlay.is-open .modal-fs-dialog {
  transform: scale(1) translateY(0);
}

.modal-fs-dialog h3 {
  font-size: 1.1rem;
  margin: 0 0 0.6rem;
}

.modal-fs-dialog > p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0 0 1rem;
  line-height: 1.6;
}

.modal-fs-news-meta {
  font-size: 0.75rem;
  color: var(--accent);
  margin: 0 0 0.2rem !important;
  font-weight: 500;
}

/* 閉じるボタン（ダイアログ内） */
.modal-fs-inner-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
}

/* ページ読み込み時 — 動画ボックス（フレーム内サイズ） */
.modal-fs-video-box {
  position: relative;
  width: min(85%, 400px);
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  transform: translateY(32px);
  opacity: 0;
  transition: transform 0.55s cubic-bezier(0.22,1,0.36,1) 0.2s,
              opacity 0.45s ease 0.2s;
}

.modal-fs-inner-overlay.is-open .modal-fs-video-box {
  transform: translateY(0);
  opacity: 1;
}

.modal-fs-video-box .modal-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 5;
  background: rgba(0,0,0,0.6);
  color: #fff;
}

.modal-fs-video-caption {
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.6);
  text-align: center;
  margin: 0;
}

/* 動画ライトボックス */
.modal-fs-video-thumb {
  width: 100%;
  max-width: 280px;
  margin: 0;
  aspect-ratio: 16/9;
  background: #1a1a1a;
  border-radius: 6px;
  border: 2px solid rgba(255,255,255,0.12);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: opacity 0.2s, border-color 0.2s;
}

.modal-fs-video-thumb:hover { opacity: 0.8; border-color: var(--accent); }

.modal-fs-play-icon  { font-size: 1.5rem; color: #fff; }
.modal-fs-thumb-label { font-size: 0.7rem; color: rgba(255,255,255,0.55); }

.modal-fs-video-wrap {
  position: relative;
  width: min(92%, 540px);
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  transform: scale(0.93);
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

.modal-fs-inner-overlay.is-open .modal-fs-video-wrap { transform: scale(1); }

.modal-fs-video-wrap .modal-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 5;
  background: rgba(0,0,0,0.6);
  color: #fff;
}

.modal-fs-video {
  width: 100%;
  height: auto;
  max-height: 38vh;
  display: block;
}

/* 画像ライトボックス */
.modal-fs-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  width: 100%;
}

.modal-fs-gallery-item {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 0.3rem;
  transition: transform 0.2s, opacity 0.2s;
}

.modal-fs-gallery-item:hover { transform: scale(1.06); opacity: 0.9; }

.modal-fs-gallery-label {
  font-size: 0.6875rem;
  color: #fff;
  text-shadow: 0 1px 4px rgba(0,0,0,0.6);
}

.modal-fs-image-dialog {
  position: relative;
  width: min(90%, 400px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transform: scale(0.92);
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

.modal-fs-inner-overlay.is-open .modal-fs-image-dialog { transform: scale(1); }

.modal-fs-image-dialog .modal-close {
  position: absolute;
  top: -0.5rem;
  right: -0.5rem;
  background: rgba(0,0,0,0.6);
  color: #fff;
}

.modal-fs-image-display {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 8px;
  flex-shrink: 0;
}

.modal-fs-image-caption {
  color: rgba(255,255,255,0.7);
  font-size: 0.8125rem;
  margin: 0;
  text-align: center;
}

/* テキストライトボックス — お知らせ一覧 */
.modal-fs-news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
  text-align: left;
}

.modal-fs-news-item {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  width: 100%;
  padding: 0.6rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 7px;
  cursor: pointer;
  transition: background 0.2s;
  text-align: left;
}

li + li .modal-fs-news-item { margin-top: 0.4rem; }
.modal-fs-news-item:hover { background: var(--surface-1); }

.modal-fs-news-date {
  font-size: 0.6875rem;
  color: var(--accent);
  white-space: nowrap;
  font-weight: 500;
}

.modal-fs-news-title {
  font-size: 0.875rem;
  color: var(--text);
  flex: 1;
}

/* ライトボックスシーン */
.modal-fs-lb-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
}

.modal-fs-lb-section {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  align-items: stretch;
  width: 100%;
}

.modal-fs-lb-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--border);
  width: 100%;
}

.modal-fs-hint {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

/* 全ボタン角丸 8px（chapters 内の上書き） */
.btn,
.btn-sm,
.btn-primary,
.btn-ghost,
.theme-btn,
[class$="-fs-open"],
.loading-try-btn,
.modal-fs-open,
.hb-toggle,
.tab-btn {
  border-radius: 8px;
}