.timeline {
  padding: 0 max(1.5rem, env(safe-area-inset-left)) max(1.5rem, env(safe-area-inset-bottom)) max(1.5rem, env(safe-area-inset-right));
  max-width: 1600px;
  margin: 0 auto;
}

.tl-group {
  margin-top: 1.75rem;
}
.tl-group:first-child { margin-top: 1rem; }

.tl-header {
  position: sticky;
  top: 52px;           /* sits just under the site top bar */
  z-index: 4;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0.65rem 0.25rem;
  margin: 0 0 0.5rem;
  background: linear-gradient(180deg, rgba(10,11,14,0.92) 0%, rgba(10,11,14,0.82) 70%, rgba(10,11,14,0) 100%);
  backdrop-filter: blur(8px);
}
.tl-header h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.tl-header .count {
  color: var(--muted);
  font-size: 0.8rem;
}

.tl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.5rem;
}

/* Skeleton placeholders while /api/timeline is in flight. */
.tl-skeleton-header {
  height: 1.4rem;
  width: 10rem;
  border-radius: 4px;
  background: var(--panel-hi);
  position: relative;
  overflow: hidden;
  margin: 0.65rem 0.25rem 0.9rem;
}
.tl-skeleton-header::after,
.tl-item.skeleton-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.06) 50%, transparent 100%);
  transform: translateX(-100%);
  animation: tl-skeleton-shimmer 2.4s linear infinite;
}
.tl-item.skeleton-item { cursor: default; pointer-events: none; overflow: hidden; }
@keyframes tl-skeleton-shimmer {
  100% { transform: translateX(100%); }
}

.tl-item {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel-hi);
  display: block;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s;
}
.tl-item:hover { transform: translateY(-1px); border-color: var(--border-hi); }
.tl-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.tl-item .tl-badge {
  position: absolute;
  top: 0.35rem;
  right: 0.35rem;
  padding: 0.1rem 0.4rem;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(0, 0, 0, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  color: #fff;
  font-weight: 600;
}
.tl-item .tl-day {
  position: absolute;
  left: 0.4rem;
  bottom: 0.35rem;
  font-size: 0.72rem;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7);
  font-variant-numeric: tabular-nums;
}

.empty {
  color: var(--muted);
  padding: 4rem 2rem;
  text-align: center;
  font-size: 0.95rem;
}

@media (max-width: 720px) {
  .timeline { padding: 0 1rem 1rem; }
  .tl-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 0.35rem; }
  .tl-header { top: 48px; }
  .tl-header h2 { font-size: 0.95rem; }
}