/* ========================================
   Motion Showcase — スタイルシート
   打ち合わせ用デモサイトの見た目・アニメーション
   ======================================== */

/* ----- 変数（配色・サイズ・動きの強さ） ----- */
:root {
  --bg: #f7f8f6;
  --bg-card: #fdfdfb;
  --bg-stage: #eef0ec;
  --text: #18181b;
  --text-muted: #52525b;
  --text-on-card: #18181b;
  --text-muted-on-card: #52525b;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --border: rgba(0, 0, 0, 0.08);
  --header-bg: rgba(247, 248, 246, 0.92);
  --header-bg-compact: rgba(247, 248, 246, 0.97);
  --surface-1: rgba(0, 0, 0, 0.035);
  --surface-2: rgba(0, 0, 0, 0.055);
  --surface-3: rgba(0, 0, 0, 0.08);
  --ghost-hover-border: rgba(0, 0, 0, 0.18);
  --hero-glow-1: rgba(99, 102, 241, 0.12);
  --hero-glow-2: rgba(139, 92, 246, 0.06);
  --note-bg: rgba(99, 102, 241, 0.07);
  --fade-item-bg: rgba(0, 0, 0, 0.035);
  --mini-header-bg: rgba(253, 253, 251, 0.95);
  --compare-result-bg: rgba(0, 0, 0, 0.035);
  --modal-close-bg: rgba(0, 0, 0, 0.05);
  --carousel-btn-bg: rgba(0, 0, 0, 0.4);
  --radius: 12px;
  --radius-lg: 20px;
  --btn-radius: 8px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 72px;
  --font: 'Noto Sans JP', 'Inter', sans-serif;
  /* 以下は JS のスライダーから動的に変更される */
  --motion-intensity: 1;
  --motion-speed: 1;
  --motion-distance: 40px;
  --motion-duration: 0.7s;
}

html {
  scroll-behavior: smooth;
  color-scheme: light dark;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background 0.35s ease, color 0.35s ease;
}

.container {
  width: 92vw;
  max-width: 1100px;
  margin: 0 auto;
}

/* ----- ヘッダー（スクロール追従・埋め込みブラウザでもURL欄に被らない） ----- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  transition: height var(--transition), background var(--transition);
  overflow: visible;
}

.site-header.compact {
  height: 56px;
  background: var(--header-bg-compact);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  height: 100%;
  min-width: 0;
}

.logo {
  flex-shrink: 0;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a,
.nav .nav-scroll {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
}

.nav a:hover,
.nav .nav-scroll:hover { color: var(--accent); }

.nav .nav-scroll {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
}

/* サイトヘッダー：グローバルナビ（右寄せ・テキストリンク・全項目表示） */
.site-header .site-gnav {
  display: flex;
  justify-content: flex-end;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  overflow: visible;
  min-width: 0;
  flex: 1 1 auto;
  margin-left: auto;
}

.site-header .site-gnav .gnav-arrow,
.site-header .site-gnav .gnav-item.has-dropdown:hover .gnav-arrow {
  display: none !important;
  transform: none !important;
}

.site-header .site-gnav .gnav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.1rem 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow: visible;
}

.site-header .site-gnav .gnav-item {
  position: relative;
  flex-shrink: 0;
}

.site-header .site-gnav .gnav-link,
.site-header .site-gnav .gnav-dropdown-item {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  color: var(--text-muted);
  padding: 0.35rem 0.55rem;
  font-size: 0.875rem;
  text-align: left;
  transition: color 0.2s;
}

.site-header .site-gnav .gnav-link:hover,
.site-header .site-gnav .gnav-dropdown-item:hover {
  color: var(--accent);
}

.site-header .site-gnav .gnav-dropdown {
  min-width: 11rem;
  z-index: 200;
}

.site-header .site-gnav .gnav-dropdown-item {
  display: block;
  width: 100%;
  padding: 0.45rem 0.85rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

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

/* ----- ヒーロー（トップの紹介エリア） ----- */
.hero {
  position: relative;
  min-height: calc(100dvh - var(--header-h));
  display: flex;
  align-items: center;
  padding: 3rem 0 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--hero-glow-1), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, var(--hero-glow-2), transparent);
  pointer-events: none;
  transition: background 0.35s ease;
}

.hero-inner { position: relative; z-index: 1; }

.hero-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid rgba(129, 140, 248, 0.3);
  border-radius: 999px;
}

.hero h1 {
  /* clamp() は VS Code が誤警告することがあるため、メディアクエリで可変サイズに */
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  color: var(--text);
}

@media (min-width: 480px) {
  .hero h1 { font-size: 2.5rem; }
}

@media (min-width: 768px) {
  .hero h1 { font-size: 3.25rem; }
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 540px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ----- ボタン共通 ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--btn-radius);
  border: none;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
  text-decoration: none;
}

button,
a.btn,
.theme-btn,
.gnav-link,
.gnav-dropdown-item,
.site-pagetop,
.demo-back-sticky,
.adopt-center-notice-trigger {
  border-radius: var(--btn-radius);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--ghost-hover-border);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  background: var(--surface-2);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-sm:hover {
  color: var(--text);
  background: var(--surface-3);
}

.btn-sm.active,
.btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--accent) 35%, transparent),
    0 4px 14px rgba(99, 102, 241, 0.28);
}

.btn-sm.active:hover,
.btn.active:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}

.btn-sm:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* 全画面で見る（全セクション共通・高さ統一） */
.btn.btn-sm[class*='-fs-open'],
.btn.btn-sm.loading-try-btn {
  min-height: 2.25rem;
  height: 2.25rem;
  padding: 0 0.75rem;
  line-height: 1;
  box-sizing: border-box;
}

/* ----- 見た目プレビュー（背景色・ライト/ダーク） ----- */
.appearance-card {
  border-color: rgba(129, 140, 248, 0.25);
}

.appearance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.appearance-block {
  background: var(--bg-stage);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.appearance-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.theme-toggle {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.theme-btn {
  flex: 1;
  padding: 0.65rem 1rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  border: 2px solid var(--border);
  border-radius: var(--btn-radius);
  background: var(--surface-1);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

.theme-btn:hover {
  color: var(--text);
  border-color: var(--ghost-hover-border);
}

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

.bg-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 0.5rem;
}

.bg-swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem;
  border: 2px solid transparent;
  border-radius: 10px;
  background: none;
  cursor: pointer;
  min-width: 56px;
  transition: border-color 0.2s, transform 0.2s;
}

.bg-swatch:hover { transform: translateY(-2px); }

.bg-swatch.active {
  border-color: var(--accent);
}

.bg-swatch-color {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.bg-swatch-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.bg-swatch.active .bg-swatch-label {
  color: var(--accent);
  font-weight: 600;
}

.appearance-preview {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  background: var(--compare-result-bg);
  border-radius: 8px;
  margin-bottom: 1rem;
}

.appearance-preview-chip {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
}

.appearance-preview-text {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ----- デモカード共通 ----- */
.main {
  padding: 2rem 0 6rem;
}

#appearance,
#adopt-hub {
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-on-card, var(--border));
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2.5rem;
  scroll-margin-top: calc(var(--header-h) + 1rem);
  color: var(--text-on-card, var(--text));
  transition: background 0.35s ease, border-color 0.35s ease, color 0.35s ease;
}

.demo-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.demo-tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.demo-card h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.demo-desc {
  color: var(--text-muted-on-card, var(--text-muted));
  font-size: 0.9375rem;
}

.plain-name {
  font-size: 0.875rem;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

/* カード／ステージ上の UI（黒背景×ライト時にページ用 --text が薄くなるのを防ぐ） */
.demo-card .btn-ghost,
.selection-tray .btn-ghost,
.adopt-sessions .btn-ghost {
  color: var(--text-muted-on-card, var(--text-muted));
  border-color: var(--border-on-card, var(--border));
}

.demo-card .btn-ghost:hover,
.selection-tray .btn-ghost:hover,
.adopt-sessions .btn-ghost:hover {
  color: var(--text-on-card, var(--text));
}

.demo-card .btn-sm:not(.btn-primary),
.selection-tray .btn-sm:not(.btn-primary),
.adopt-sessions .btn-sm:not(.btn-primary) {
  color: var(--text-on-card, var(--text));
  background: var(--surface-3);
  border-color: var(--border-on-card, var(--border));
}

.demo-card .btn-sm:not(.btn-primary):hover,
.selection-tray .btn-sm:not(.btn-primary):hover,
.adopt-sessions .btn-sm:not(.btn-primary):hover {
  color: var(--text-on-card, var(--text));
  background: var(--border-on-card, var(--border));
}

.appearance-block {
  color: var(--text-on-card, var(--text));
}

.appearance-block .appearance-hint,
.appearance-block .theme-btn:not(.active),
.appearance-block .bg-swatch-label {
  color: var(--text-muted-on-card, var(--text-muted));
}

.appearance-block .theme-btn:not(.active) {
  border-color: var(--border-on-card, var(--border));
}

.appearance-block .theme-btn:not(.active):hover {
  color: var(--text-on-card, var(--text));
}

.appearance-preview-text,
.demo-card .demo-note,
.demo-card .adopt-empty,
.demo-card .adopt-current-status,
.demo-card .adopt-selection-chapter,
.demo-card .adopt-save-feedback {
  color: var(--text-muted-on-card, var(--text-muted));
}

/* ----- 打ち合わせ用コントロール（強さ・速度スライダー） ----- */
.meeting-tools {
  border-color: rgba(129, 140, 248, 0.25);
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.08), var(--bg-card));
}

[data-local-motion] {
  --local-intensity: var(--motion-intensity, 1);
  --local-speed: var(--motion-speed, 1);
  --local-duration: var(--motion-duration, 0.7s);
  --local-distance: var(--motion-distance, 40px);
}

/* ----- セクション内 動き・速度スライダー ----- */
.local-controls {
  margin-bottom: 1.25rem;
  padding: 1rem 1.25rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.local-controls-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.local-controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  align-items: end;
}

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

.local-control-label {
  font-size: 0.8125rem;
  font-weight: 500;
}

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

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

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

.local-preview-btn {
  align-self: end;
  justify-self: start;
}

@media (min-width: 640px) {
  .local-controls-grid {
    grid-template-columns: 1fr 1fr auto;
  }
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.control-label {
  font-size: 0.9375rem;
  font-weight: 500;
}

.control-label small {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-top: 0.15rem;
}

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

.control-value {
  font-size: 0.8125rem;
  color: var(--accent);
}

/* ----- 打ち合わせメモ（採用 / 不要 / 保留） ----- */
.checklist-card {
  border-color: rgba(34, 197, 94, 0.2);
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.checklist-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-stage);
  border-radius: 8px;
  flex-wrap: wrap;
}

.checklist-name {
  font-size: 0.875rem;
}

.checklist-btns {
  display: flex;
  gap: 0.35rem;
}

.chk-btn {
  padding: 0.35rem 0.65rem;
  font-family: inherit;
  font-size: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

.chk-btn:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.2);
}

.chk-btn.active-yes {
  background: rgba(34, 197, 94, 0.2);
  border-color: #22c55e;
  color: #86efac;
}

.chk-btn.active-no {
  background: rgba(239, 68, 68, 0.15);
  border-color: #ef4444;
  color: #fca5a5;
}

.chk-btn.active-hold {
  background: rgba(234, 179, 8, 0.15);
  border-color: #eab308;
  color: #fde047;
}

.memo-output {
  width: 100%;
  padding: 1rem;
  background: var(--bg-stage);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.8125rem;
  line-height: 1.6;
  resize: vertical;
}

.demo-stage {
  background: var(--bg-stage);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 1rem;
  min-height: 120px;
}

.demo-note {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 0.75rem 1rem;
  background: var(--note-bg);
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

/* ----- タブ切り替え ----- */
.tab-list {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.875rem;
  cursor: pointer;
  position: relative;
  transition: color 0.2s;
}

.tab-btn.active {
  color: var(--text);
}

.tab-panel {
  display: none;
}

.tab-panel.active { display: block; }

.tab-panel[hidden] { display: none !important; }

.tab-panel p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ----- モーダル（ポップアップ） ----- */
.modal-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 140px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  padding: 1rem;
}

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

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 100%;
  max-width: 420px;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.modal-overlay.open .modal {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 32px;
  height: 32px;
  border: none;
  background: var(--modal-close-bg);
  color: var(--text-muted);
  font-size: 1.25rem;
  border-radius: 8px;
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover { color: var(--text); }

.modal h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.modal p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 1.25rem;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.modal-form input {
  padding: 0.75rem 1rem;
  background: var(--bg-stage);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9375rem;
}

.modal-form input:focus {
  outline: none;
  border-color: var(--accent);
}

/* ----- カルーセル（スライドショー） ----- */
[data-local-motion] .carousel-track {
  transition: transform calc(0.5s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}

.carousel-track {
  display: flex;
  transition: transform calc(0.5s / var(--motion-speed)) cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
  min-width: 100%;
  height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--slide-color, #6366f1);
  transition: opacity 0.3s;
}

.carousel-slide span {
  font-size: 2rem;
  font-weight: 700;
  opacity: 0.9;
}

.carousel-slide p {
  font-size: 0.9375rem;
  opacity: 0.8;
  margin-top: 0.5rem;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border: none;
  background: var(--carousel-btn-bg);
  color: #fff;
  font-size: 1.5rem;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.2s;
  line-height: 1;
}

.carousel-btn:hover { background: rgba(0, 0, 0, 0.6); }
.carousel-btn.prev { left: 12px; }
.carousel-btn.next { right: 12px; }

.carousel-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background 0.2s, transform 0.2s;
}

.carousel-dot.active {
  background: #fff;
  transform: scale(1.2);
}

/* ----- カウントアップ（数字のアニメーション） ----- */
.countup-stage {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 2rem;
  padding: 2.5rem;
}

.countup-item {
  text-align: center;
}

.countup-num {
  display: inline;
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.countup-suffix {
  font-size: 1.5rem;
  color: var(--accent);
  margin-left: 0.15rem;
}

.countup-label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ----- ボタンのマイクロインタラクション ----- */
.button-stage {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: center;
}

.btn-ripple {
  position: relative;
  overflow: hidden;
}

.btn-ripple .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: rippleAnim 0.6s ease-out;
  pointer-events: none;
}

@keyframes rippleAnim {
  to { transform: scale(4); opacity: 0; }
}

.btn-arrow .arrow {
  display: inline-block;
  transition: transform 0.3s;
}

.btn-arrow:hover .arrow {
  transform: translateX(4px);
}

.btn-loading {
  min-width: 140px;
  position: relative;
}

.btn-loading.loading .btn-text { opacity: 0; }

.btn-spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  position: absolute;
}

.btn-loading.loading .btn-spinner { display: block; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ----- ページ遷移デモ ----- */
.transition-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  width: 100%;
}

.transition-preview {
  position: relative;
  width: 100%;
  max-width: 400px;
  height: 200px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.transition-page {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  clip-path: inset(0 0 0 0);
}

.transition-page.page-a { background: linear-gradient(135deg, #4338ca, #6366f1); }
.transition-page.page-b { background: linear-gradient(135deg, #7c3aed, #a855f7); }

.transition-page.active {
  opacity: 1;
  pointer-events: auto;
}

.transition-page.is-exiting,
.transition-page.is-entering {
  opacity: 1;
  pointer-events: none;
}

.transition-page.fade-out {
  animation: pageFadeOut calc(0.4s / var(--local-speed, 1)) ease forwards;
}

.transition-page.fade-in {
  animation: pageFadeIn calc(0.4s / var(--local-speed, 1)) ease forwards;
}

.transition-page.slide-out {
  animation: pageSlideOut calc(0.4s / var(--local-speed, 1)) ease forwards;
}

.transition-page.slide-in {
  animation: pageSlideIn calc(0.4s / var(--local-speed, 1)) ease forwards;
}

.transition-page.scale-out {
  animation: pageScaleOut calc(0.4s / var(--local-speed, 1)) ease forwards;
}

.transition-page.scale-in {
  animation: pageScaleIn calc(0.4s / var(--local-speed, 1)) ease forwards;
}

.transition-page.bg-radial-in {
  animation: bgRadialIn calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.transition-page.bg-vertical-in {
  animation: bgVerticalIn calc(0.5s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.transition-page.bg-diagonal-in {
  animation: bgDiagonalIn calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.transition-page.bg-circle-shrink-out {
  animation: bgCircleShrinkOut calc(0.55s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.transition-page.bg-square-in {
  animation: bgSquareIn calc(0.5s / var(--local-speed, 1)) cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes pageFadeOut { to { opacity: 0; } }
@keyframes pageFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes pageSlideOut {
  to { transform: translateX(calc(-100% * var(--local-intensity, 1))); opacity: 0; }
}
@keyframes pageSlideIn {
  from { transform: translateX(calc(100% * var(--local-intensity, 1))); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
@keyframes pageScaleOut {
  to { transform: scale(calc(1 - 0.12 * var(--local-intensity, 1))); opacity: 0; }
}
@keyframes pageScaleIn {
  from { transform: scale(calc(1 + 0.12 * var(--local-intensity, 1))); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes bgRadialIn {
  from { clip-path: circle(0% at 50% 50%); }
  to { clip-path: circle(calc(150% * var(--local-intensity, 1)) at 50% 50%); }
}

@keyframes bgVerticalIn {
  from { clip-path: inset(calc(50% * var(--local-intensity, 1)) 0 calc(50% * var(--local-intensity, 1)) 0); }
  to { clip-path: inset(0 0 0 0); }
}

@keyframes bgDiagonalIn {
  from { clip-path: polygon(50% 50%, 50% 50%, 50% 50%, 50% 50%); }
  50% { clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%); }
  to { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }
}

@keyframes bgCircleShrinkOut {
  from { clip-path: circle(calc(150% * var(--local-intensity, 1)) at 50% 50%); }
  to { clip-path: circle(0% at 50% 50%); }
}

@keyframes bgSquareIn {
  from { clip-path: inset(calc(50% * var(--local-intensity, 1)) calc(50% * var(--local-intensity, 1)) calc(50% * var(--local-intensity, 1)) calc(50% * var(--local-intensity, 1))); }
  to { clip-path: inset(0 0 0 0); }
}

/* ----- ページトップ（サイト共通・accent ブルー円） ----- */
.pagetop-fab {
  display: grid;
  place-items: center;
  padding: 0;
  font-family: inherit;
  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(0.75rem);
  pointer-events: none;
  transition:
    opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
    background 0.2s ease,
    box-shadow 0.2s ease;
}

.pagetop-fab.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.pagetop-fab.is-hiding {
  opacity: 0;
  transform: translateY(0.75rem);
  pointer-events: none;
}

.pagetop-fab: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);
}

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

.site-pagetop {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 90;
  width: 44px;
  height: 44px;
  font-size: 1.25rem;
}

@media (max-width: 640px) {
  .site-pagetop {
    right: 0.85rem;
    bottom: 0.85rem;
    width: 40px;
    height: 40px;
    font-size: 1.125rem;
  }
}

/* ----- フッター ----- */
.site-footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.site-footer p {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.footer-sub {
  font-size: 0.8125rem !important;
  margin-top: 0.5rem;
  opacity: 0.7;
}

/* タブレット・スマホ向けは css/responsive.css */

/* ===== パターン選択システム ===== */

/* 選択中カードの枠線 */
.is-selected-pattern {
  outline: 3px solid var(--accent) !important;
  outline-offset: 2px;
  position: relative !important;
}

/* ✓バッジ（右上に浮く） */
.pattern-check-badge {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  width: 22px;
  height: 22px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  pointer-events: none;
  z-index: 2;
  line-height: 1;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  user-select: none;
}

/* 選択可能なカード（クリックで選択） */
[data-selection-id] {
  cursor: pointer;
}

/* 動き・速度のローカルコントロールは廃止（全画面のみ） */
.local-controls {
  display: none !important;
}

/* ===== フローティング選択トレイ ===== */
.selection-tray {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.5rem;
  background: var(--bg-card);
  border-top: 2px solid var(--accent);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.12);
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.selection-tray.is-visible {
  transform: translateY(0);
}

.selection-tray {
  color: var(--text-on-card, var(--text));
  border-color: var(--border-on-card, var(--border));
}

.selection-tray-count {
  font-size: 0.875rem;
  color: var(--text-on-card, var(--text));
  font-weight: 600;
  margin-right: auto;
}

.selection-tray-unsaved {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  padding: 0.25em 0.65em;
  font-size: 0.8rem;
  font-weight: 600;
  color: #7a4f00;
  background: #ffe066;
  border-radius: 999px;
  white-space: nowrap;
}

.selection-tray-unsaved[hidden] {
  display: none;
}

.selection-tray-unsaved-icon {
  font-size: 0.85em;
}

.selection-tray-count strong {
  color: var(--accent);
  font-size: 1rem;
}

/* トレイ表示中はサイトのページトップボタンを上にずらす */
body.selection-tray-open #sitePagetop {
  bottom: calc(1.25rem + 60px);
}


/* ===== 選択プレビューオーバーレイ ===== */
.selection-fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

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

.selection-fs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  height: 100dvh;
  overflow: hidden;
}

/* 閉じるボタン（左上固定） */
.selection-fs-overlay .fs-close {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 10;
}

/* サイドバー */
.selection-fs-sidebar {
  border-right: 1px solid var(--border);
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding-top: 3.5rem;
}

.selection-fs-sidebar-title {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.selection-fs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.5rem 0.5rem;
  overflow-y: auto;
  flex: 1;
}

.selection-fs-list-item {
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--text-muted);
  transition: background 0.15s, color 0.15s;
  user-select: none;
}

.selection-fs-list-item:hover {
  background: var(--surface-1, rgba(99, 102, 241, 0.08));
  color: var(--text);
}

.selection-fs-list-item.is-active {
  background: var(--accent);
  color: #fff;
}

.selection-fs-list-item-chapter {
  font-size: 0.625rem;
  opacity: 0.75;
  display: block;
  margin-bottom: 0.1rem;
}

/* メインペイン */
.selection-fs-main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.selection-fs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 1rem;
  padding-left: 1.5rem;
  min-height: 60px;
}

.selection-fs-pattern-label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* パネル共通 */
.selection-fs-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* プレビューパネル */
.selection-fs-demo-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-stage, rgba(0,0,0,0.03));
  padding: 2rem;
  overflow: auto;
  position: relative;
}

.selection-fs-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.selection-fs-nav-position {
  font-size: 0.875rem;
  color: var(--text-muted);
  min-width: 5rem;
  text-align: center;
}

/* フォールバック（複雑なパターン用） */
.selection-fs-fallback {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
  padding: 2rem;
}

.selection-fs-fallback-thumb {
  max-width: 380px;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  pointer-events: none;
  transform: scale(0.9);
}

.selection-fs-fallback-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.selection-fs-tabs {
  display: flex;
  gap: 0.35rem;
  flex-shrink: 0;
}

.selection-fs-tab {
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
}

.selection-fs-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.selection-fs-panel:not(.is-active) {
  display: none;
}

.selection-fs-code-output {
  flex: 1;
  width: 100%;
  min-height: 0;
  margin: 0;
  padding: 1rem 1.25rem;
  border: none;
  resize: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--text-on-card, var(--text));
  background: var(--bg-card);
}

.selection-fs-code-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.selection-code-fallback {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 28rem;
}

/* 採用ハブ */
.adopt-hub-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 1.25rem;
}

.adopt-hub-preview-link {
  text-decoration: none;
}

.adopt-selection-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.adopt-empty {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
}

.adopt-selection-item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-on-card, var(--border));
  border-radius: var(--radius);
  background: var(--bg-stage, var(--bg-card));
  color: var(--text-on-card, var(--text));
}

.adopt-selection-index {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
}

.adopt-selection-body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.adopt-selection-chapter {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.adopt-selection-label {
  font-size: 0.9375rem;
  font-weight: 600;
}

.adopt-selection-slot {
  font-size: 0.75rem;
  color: var(--accent);
}

.adopt-export-link {
  text-decoration: none;
}

.adopt-export-link.is-disabled {
  opacity: 0.45;
  pointer-events: none;
}

.adopt-current-status {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 0 0 1rem;
}

.adopt-save-feedback[hidden] {
  display: none;
}

.adopt-save-feedback {
  font-size: 0.75rem;
  margin: 0 0 0.55rem;
  line-height: 1.5;
}

.adopt-save-feedback.is-error {
  color: #b45309;
}

.adopt-save-feedback.is-success {
  color: #15803d;
}

.adopt-center-notice {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  transform: translateX(-50%);
  z-index: 900;
}

.adopt-center-notice[hidden] {
  display: none;
}

.adopt-center-notice-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.adopt-center-notice-trigger {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.9rem;
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: inherit;
  color: #92400e;
  background: #fef3c7;
  border: 1px solid #fcd34d;
  border-radius: 999px;
  cursor: default;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

.adopt-center-notice-panel {
  position: absolute;
  bottom: calc(100% + 0.65rem);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  width: max-content;
  max-width: min(22rem, 90vw);
  padding: 0.85rem 1rem;
  text-align: center;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s, transform 0.18s;
}

.adopt-center-notice-text {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.65;
}

.adopt-center-notice-actions {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.adopt-center-notice-actions[hidden] {
  display: none;
}

.adopt-center-notice:hover .adopt-center-notice-panel,
.adopt-center-notice:focus-within .adopt-center-notice-panel,
.adopt-center-notice.is-open .adopt-center-notice-panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.adopt-center-notice-trigger[hidden] {
  display: none;
}

.adopt-center-notice.is-close-warning.is-open {
  inset: 0;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  transform: none;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.adopt-center-notice.is-close-warning.is-open::before {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  pointer-events: auto;
}

.adopt-center-notice.is-close-warning.is-open .adopt-center-notice-inner {
  position: relative;
  z-index: 1;
}

.adopt-center-notice.is-close-warning.is-open .adopt-center-notice-panel {
  position: static;
  transform: none;
  opacity: 1;
  pointer-events: auto;
  max-width: min(24rem, 92vw);
  padding: 1.25rem 1.5rem;
}

.adopt-center-notice.is-close-warning.is-open .adopt-center-notice-text {
  font-size: 0.9375rem;
  line-height: 1.6;
}

.adopt-center-notice.is-close-warning.is-open .adopt-center-notice-actions {
  margin-top: 0.85rem;
  justify-content: center;
}

.save-before-close {
  padding: 0;
  border: none;
  background: transparent;
  max-width: none;
  max-height: none;
}

.save-before-close::backdrop {
  background: rgba(0, 0, 0, 0.42);
}

.save-before-close:not([open]) {
  display: none;
}

.save-before-close-dialog {
  width: min(22rem, 100%);
  padding: 1.35rem 1.25rem 1.1rem;
  color: #f5f5f5;
  background: #3b3b3b;
  border-radius: 14px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}

.save-before-close-message {
  margin: 0 0 1.15rem;
  font-size: 0.9375rem;
  line-height: 1.65;
  text-align: center;
}

.save-before-close-actions {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.save-before-close-btn {
  width: 100%;
  padding: 0.62rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  color: #f5f5f5;
  background: #555;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s;
}

.save-before-close-btn:hover {
  background: #666;
}

.save-before-close-btn.is-primary {
  background: #4a7fd4;
}

.save-before-close-btn.is-primary:hover {
  background: #5a8fe4;
}

.adopt-sessions {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-on-card, var(--border));
}

.adopt-sessions-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0 0 1rem;
}

.adopt-sessions .adopt-save-feedback {
  text-align: right;
  margin: 0 0 0.5rem;
}

.adopt-sessions-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
  margin: 0;
}

.adopt-session-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.adopt-session-empty {
  font-size: 0.8125rem;
  color: var(--text-muted);
  padding: 0.85rem 1rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

.adopt-session-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
}

.adopt-session-body {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
}

.adopt-session-name {
  font-size: 0.875rem;
}

.adopt-session-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.adopt-session-actions {
  display: flex;
  gap: 0.35rem;
  flex-shrink: 0;
}

.adopt-session-delete {
  min-width: 2rem;
  padding-inline: 0.45rem;
}

.demo-back-link {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  white-space: nowrap;
}

.demo-back-link:hover {
  color: var(--text);
  text-decoration: underline;
}

.demo-back-sticky {
  position: fixed;
  bottom: 1.25rem;
  left: 1.25rem;
  z-index: 490;
}

body.selection-tray-open .demo-back-sticky {
  bottom: calc(1.25rem + 60px);
}

/* ヘッダーナビのコンパクト化（タブレット横〜小さめPC）— 1024px超はデスクトップ表示 */
@media (min-width: 1025px) and (max-width: 1200px) {
  .site-header .site-gnav .gnav-link,
  .site-header .site-gnav .gnav-dropdown-item {
    padding: 0.3rem 0.45rem;
    font-size: 0.8125rem;
  }
}

/* ----- サイトヘッダー：タブレット以下のドロワー（styles.css に統合・確実に読み込む） ----- */
.site-nav-toggle {
  display: none;
}

@media (max-width: 1024px) {
  :root {
    --header-h: 60px;
  }

  .site-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    margin-left: auto;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-1);
    color: var(--text);
    cursor: pointer;
    font: inherit;
    line-height: 0;
    overflow: visible;
  }

  #siteNavToggle .site-nav-toggle-icon-wrap {
    display: block;
    width: 18px;
    height: 14px;
    padding: 1px 0;
    box-sizing: content-box;
  }

  #siteNavToggle .site-nav-toggle-icon {
    display: block;
    position: relative;
    width: 18px;
    height: 2px;
    background: currentColor;
    box-shadow: 0 6px 0 currentColor, 0 12px 0 currentColor;
    transition: background 0.2s, box-shadow 0.2s;
  }

  #siteHeader.is-nav-open #siteNavToggle .site-nav-toggle-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
  }

  #siteHeader.is-nav-open #siteNavToggle .site-nav-toggle-icon {
    width: 18px;
    height: 14px;
    background: transparent;
    box-shadow: none;
  }

  #siteHeader.is-nav-open #siteNavToggle .site-nav-toggle-icon::before,
  #siteHeader.is-nav-open #siteNavToggle .site-nav-toggle-icon::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: 18px;
    height: 2px;
    margin: -1px 0 0 -9px;
    background: currentColor;
    transform-origin: center center;
  }

  #siteHeader.is-nav-open #siteNavToggle .site-nav-toggle-icon::before {
    transform: rotate(45deg);
  }

  #siteHeader.is-nav-open #siteNavToggle .site-nav-toggle-icon::after {
    transform: rotate(-45deg);
  }

  .site-header .site-gnav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: auto;
    bottom: 0;
    z-index: 150;
    width: min(18rem, 88vw);
    margin: 0;
    padding: 0.75rem 0.85rem 1.5rem;
    flex: none;
    flex-direction: column;
    align-items: stretch;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: var(--header-bg-compact);
    border-right: 1px solid var(--border);
    box-shadow: 8px 0 32px rgba(0, 0, 0, 0.12);
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
  }

  #siteHeader.is-nav-open #siteNav,
  .site-header.is-nav-open #siteNav {
    transform: translateX(0);
    pointer-events: auto;
    visibility: visible;
  }

  .site-header .site-gnav .gnav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-header .site-gnav .gnav-item {
    border-bottom: 1px solid var(--border);
  }

  .site-header .site-gnav .gnav-link,
  .site-header .site-gnav .gnav-dropdown-item {
    display: block;
    width: 100%;
    padding: 0.85rem 0.5rem;
    font-size: 0.9375rem;
    min-height: 44px;
  }

  .site-header .site-gnav .gnav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    min-width: 0;
    margin: 0;
    padding: 0 0 0.35rem;
    background: transparent;
    border: none;
    box-shadow: none;
    list-style: none;
  }

  .site-header .site-gnav .gnav-dropdown-item {
    padding-left: 1rem;
    font-size: 0.875rem;
  }

  body.site-nav-open {
    overflow: hidden;
  }

  body.site-nav-open::before {
    content: '';
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    left: min(18rem, 88vw);
    z-index: 140;
    background: rgba(0, 0, 0, 0.35);
    pointer-events: none;
  }

  #siteHeader.is-nav-open {
    z-index: 200;
  }
}