#main-content { scroll-snap-type: y proximity; }
.chapter-nav {
  position: fixed; left: 12px; top: 50%; transform: translateY(-50%);
  z-index: var(--z-nav); display: flex; flex-direction: column; gap: 10px;
}
.chapter-nav-dot {
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid var(--color-primary); background: transparent;
  transition: var(--transition-fast); position: relative;
}
.chapter-nav-dot.active { background: var(--color-primary); transform: scale(1.15); }
.chapter-nav-label {
  position: absolute; left: 20px; top: 50%; transform: translateY(-50%);
  white-space: nowrap; font-size: 12px; color: var(--color-text-secondary);
  opacity: 0; pointer-events: none; transition: opacity .2s;
  background: var(--color-bg-card); padding: 2px 8px; border-radius: 4px;
  box-shadow: var(--shadow-card);
}
.chapter-nav-dot:hover .chapter-nav-label,
.chapter-nav-dot:focus .chapter-nav-label { opacity: 1; }
@media (max-width: 375px) {
  .chapter-nav-label { display: none; }
}
.timeline-container { position: relative; padding-left: 32px; }
.timeline-line {
  position: absolute; left: 11px; top: 0; bottom: 0; width: 3px;
  background: var(--color-border); border-radius: 2px;
}
.timeline-line-progress {
  width: 100%; background: var(--color-primary); height: 0;
  transition: height .6s ease;
}
.timeline-node {
  position: relative; margin-bottom: var(--space-xl);
  opacity: 0; transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.timeline-node.visible { opacity: 1; transform: translateY(0); }
.timeline-node-dot {
  position: absolute; left: -32px; top: 4px;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--color-bg-card); border: 3px solid var(--color-primary);
}
.timeline-node-card {
  background: var(--color-bg-card); border-radius: var(--radius-lg);
  padding: var(--space-md); box-shadow: var(--shadow-card);
}
.timeline-date { font-size: 13px; color: var(--color-accent); font-weight: 600; }
.timeline-node-title { font-size: 18px; margin: 6px 0; color: var(--color-primary); }
.timeline-highlights { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.timeline-tag {
  font-size: 12px; padding: 4px 10px; border-radius: 20px;
  background: var(--color-primary-light); color: var(--color-primary);
}
.timeline-img-placeholder {
  margin-top: 12px; height: 120px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-bg));
  display: flex; align-items: center; justify-content: center;
  font-size: 40px;
}
.metrics-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md);
}
@media (min-width: 640px) { .metrics-grid { grid-template-columns: repeat(4, 1fr); } }
.metric-card {
  background: var(--color-bg-card); border-radius: var(--radius-lg);
  padding: var(--space-md); box-shadow: var(--shadow-card); text-align: center;
}
.metric-value {
  font-size: clamp(28px, 5vw, 36px); font-weight: 700;
  color: var(--color-primary); line-height: 1.2;
}
.metric-unit { font-size: 14px; color: var(--color-text-secondary); }
.metric-label { font-size: 13px; margin-top: 4px; }
.metric-conversion {
  font-size: 12px; color: var(--color-accent); margin-top: 8px;
  padding-top: 8px; border-top: 1px dashed var(--color-border);
}
.charts-section { display: grid; gap: var(--space-lg); margin-top: var(--space-xl); }
@media (min-width: 640px) { .charts-section { grid-template-columns: repeat(2, 1fr); } }
.chart-card {
  background: var(--color-bg-card); border-radius: var(--radius-lg);
  padding: var(--space-md); box-shadow: var(--shadow-card); text-align: center;
}
.chart-card svg { max-width: 100%; height: auto; }
.gallery-section { margin-top: var(--space-xl); }
.gallery-grid {
  display: grid; gap: var(--space-sm);
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 640px) { .gallery-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 900px) { .gallery-grid { grid-template-columns: repeat(4, 1fr); } }
.gallery-item {
  aspect-ratio: 4/3; border-radius: var(--radius-md);
  background: linear-gradient(145deg, var(--color-primary-light), #fff);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  cursor: pointer; transition: transform var(--transition-fast);
  box-shadow: var(--shadow-card);
}
.gallery-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-card-hover); }
.gallery-emoji { font-size: 36px; }
.gallery-caption { font-size: 12px; margin-top: 6px; color: var(--color-text-secondary); padding: 0 8px; text-align: center; }
.honors-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--space-md); }
.honors-filter-btn {
  padding: 8px 14px; border-radius: 20px; font-size: 13px;
  border: 1px solid var(--color-border); background: var(--color-bg-card);
}
.honors-filter-btn.active {
  background: var(--color-primary); color: #fff; border-color: var(--color-primary);
}
.honors-grid {
  display: grid; gap: var(--space-md);
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 640px) { .honors-grid { grid-template-columns: repeat(3, 1fr); } }
.honor-card {
  background: var(--color-bg-card); border-radius: var(--radius-lg);
  padding: var(--space-md); box-shadow: var(--shadow-card);
  text-align: center; cursor: pointer; transition: transform .2s;
  min-height: 140px;
}
.honor-card:hover { transform: translateY(-3px); }
.honor-emoji { font-size: 40px; margin-bottom: 8px; }
.honor-title { font-size: 15px; font-weight: 600; color: var(--color-primary); }
.honor-meta { font-size: 12px; color: var(--color-text-secondary); margin-top: 6px; }
.honor-level {
  display: inline-block; margin-top: 8px; font-size: 11px;
  padding: 2px 8px; border-radius: 4px; background: var(--color-primary-light);
  color: var(--color-primary);
}
.share-actions, .share-links { display: flex; flex-wrap: wrap; gap: 10px; margin: var(--space-md) 0; }
.btn {
  padding: 12px 20px; border-radius: var(--radius-md); font-size: 15px;
  min-height: 44px; display: inline-flex; align-items: center; justify-content: center;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-secondary { background: var(--color-bg-card); color: var(--color-text); border: 1px solid var(--color-border); }
.btn-block { width: 100%; }
.share-link-btn {
  flex: 1; padding: 12px; border-radius: var(--radius-md);
  border: 1px solid var(--color-border); background: var(--color-bg-card);
  min-height: 44px;
}
#poster-preview { margin-top: var(--space-md); text-align: center; }
#poster-preview canvas { max-width: 100%; border-radius: var(--radius-md); box-shadow: var(--shadow-card); }
.lightbox {
  position: fixed; inset: 0; z-index: var(--z-lightbox);
  background: rgba(0,0,0,.88); display: flex; align-items: center; justify-content: center;
}
.lightbox[hidden] { display: none !important; }
.lightbox-image { max-width: 90%; max-height: 80vh; border-radius: var(--radius-md); }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute; color: #fff; font-size: 28px; padding: 12px;
  background: rgba(255,255,255,.15); border-radius: 50%; width: 44px; height: 44px;
}
.lightbox-close { top: 16px; right: 16px; }
.lightbox-prev { left: 12px; }
.lightbox-next { right: 12px; }
.lightbox-counter {
  position: absolute; bottom: 20px; color: #fff; font-size: 14px;
}
.a11y-toolbar {
  position: fixed; right: 12px; bottom: 100px; z-index: var(--z-a11y);
  display: flex; flex-direction: column; gap: 4px;
  background: var(--color-bg-card); padding: 6px; border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}
.a11y-toolbar button {
  width: 36px; height: 36px; border-radius: 6px; font-size: 12px;
  border: 1px solid var(--color-border);
}
.a11y-toolbar button.active { background: var(--color-primary); color: #fff; }
.scheme-picker { display: flex; flex-wrap: wrap; gap: 6px; margin-top: var(--space-md); }
.scheme-chip {
  padding: 6px 10px; font-size: 12px; border-radius: 16px;
  border: 1px solid var(--color-border); background: var(--color-bg-card);
}
.scheme-chip.active { border-color: var(--color-primary); color: var(--color-primary); }
.share-card { background: var(--color-bg-card); padding: var(--space-lg); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); }
.share-open-btn {
  display: block; text-align: center; padding: 12px; margin-top: 12px;
  background: var(--color-primary); color: #fff; border-radius: 8px; text-decoration: none;
}
.muted { color: var(--color-text-secondary); font-size: 14px; }