body[data-export-page] {
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font, 'Inter', 'Noto Sans JP', sans-serif);
}

.export-close {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 100;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-card);
  color: var(--text);
  font-size: 1.5rem;
  font-family: inherit;
  cursor: pointer;
  line-height: 1;
  padding: 0;
  display: grid;
  place-items: center;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
}

.export-close:hover {
  background: var(--surface-2, var(--bg-card));
}

.export-page {
  max-width: 640px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.export-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-bottom: 2rem;
}

.export-back {
  display: inline-flex;
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-decoration: none;
}

.export-back:hover {
  color: var(--text);
}

.export-back-sub {
  color: var(--accent);
}

.export-header {
  margin-bottom: 1.75rem;
}

.export-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 0.35rem;
  letter-spacing: 0.04em;
}

.export-header h1 {
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
}

.export-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.65;
}

.export-appearance {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  margin-bottom: 1.5rem;
  font-size: 0.8125rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  color: var(--text-muted);
}

.export-section-title {
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.export-selection {
  margin-bottom: 2rem;
}

.export-selection-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.export-empty {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
  padding: 1rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

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

.export-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;
}

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

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

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

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

.export-actions {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.export-action-btn,
.export-action-link {
  width: 100%;
  justify-content: center;
  text-align: center;
  text-decoration: none;
}

.export-note {
  margin-top: 1.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}