.timeline-page {
  padding-top: calc(var(--nav-height) + var(--space-8));
  padding-bottom: var(--space-16);
}

.timeline-hero {
  text-align: center;
  margin: 0 auto var(--space-10);
}

.timeline-title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-display);
  font-variation-settings: 'wght' 650;
  font-size: clamp(2.35rem, 4.8vw, 3.9rem);
  letter-spacing: -0.03em;
}

.timeline-lede {
  margin: var(--space-3) auto 0;
  max-width: 78ch;
}

.timeline-layout {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: var(--space-4);
  align-items: start;
}

.timeline-rail {
  padding: var(--space-4);
}

.timeline-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.timeline-controls__left {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.timeline-controls label {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.timeline-controls input[type='search'],
.timeline-controls select {
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 0.55rem 0.7rem;
}

.timeline-controls input[type='search'] {
  width: min(360px, 52vw);
}

.timeline-controls button {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-primary);
  padding: 0.55rem 0.7rem;
  cursor: pointer;
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.timeline-controls button:hover {
  border-color: color-mix(in srgb, var(--accent) 60%, rgba(255, 255, 255, 0.2));
  background: rgba(0, 0, 0, 0.32);
  transform: translateY(-1px);
}

.timeline-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
}

.timeline-year {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.timeline-item {
  width: 100%;
  text-align: left;
  border: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.24);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  cursor: pointer;
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.timeline-item:hover {
  transform: translateY(-1px);
  background: rgba(0, 0, 0, 0.34);
  border-color: var(--border-default);
}

.timeline-item[aria-selected='true'] {
  border-color: color-mix(in srgb, var(--accent) 70%, rgba(255, 255, 255, 0.18));
  box-shadow: 0 18px 54px rgba(0, 0, 0, 0.55);
}

.timeline-item__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
}

.timeline-item__date {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.timeline-item__badge {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.22);
}

.timeline-item__title {
  margin: var(--space-2) 0 0;
  font-size: var(--text-lg);
  color: var(--text-primary);
  line-height: 1.35;
}

.timeline-detail {
  padding: var(--space-4);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-4));
}

.timeline-detail h2 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-variation-settings: 'wght' 560;
  font-size: var(--text-2xl);
}

.timeline-detail__date {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.timeline-detail__summary {
  margin: 0;
}

.timeline-detail__hint {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  max-width: none;
}

@media (max-width: 980px) {
  .timeline-layout { grid-template-columns: 1fr; }
  .timeline-detail { position: static; }
}