.timeline-horizontal {
  --timeline-card-min: 320px;
  --timeline-card-max: 480px;
  --timeline-card-gap: 32px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1rem;
  border-radius: var(--timeline-radius);
  border: 1px solid var(--timeline-border);
  background: linear-gradient(145deg, rgba(15, 23, 42, 0.02), rgba(59, 130, 246, 0.04));
}

.timeline-horizontal .timeline-scroll {
  overflow-x: auto;
  padding-bottom: 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--timeline-primary) transparent;
}

.timeline-horizontal .timeline-scroll::-webkit-scrollbar {
  height: 6px;
}

.timeline-horizontal .timeline-scroll::-webkit-scrollbar-thumb {
  background: var(--timeline-primary);
  border-radius: 999px;
}

.timeline-horizontal .timeline-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(var(--timeline-card-min), min(var(--timeline-card-max), 80vw));
  gap: var(--timeline-card-gap);
  scroll-snap-type: x mandatory;
  padding: 0.5rem 2rem 2.5rem;
}

.timeline-horizontal .timeline-track-spacer {
  width: 1px;
}

.timeline-horizontal .timeline-card {
  scroll-snap-align: center;
  min-height: 280px;
  border: 1px solid transparent;
  transition: border-color var(--timeline-transition), transform var(--timeline-transition), box-shadow var(--timeline-transition);
}

.timeline-horizontal .timeline-card.is-active {
  border-color: var(--timeline-primary);
  box-shadow: 0 20px 40px rgba(37, 99, 235, 0.18);
}

.timeline-horizontal .timeline-card figure {
  margin-top: 1.25rem;
  overflow: hidden;
}

.timeline-horizontal .timeline-card img,
.timeline-horizontal .timeline-card video {
  max-height: 220px;
  width: 100%;
  object-fit: cover;
  border-radius: calc(var(--timeline-radius) - 6px);
}

.timeline-horizontal .timeline-axis {
  padding: 0 1rem 2.5rem;
}

.timeline-horizontal .timeline-axis-track {
  position: relative;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.1), rgba(37, 99, 235, 0.3));
}

.timeline-horizontal .timeline-axis-tick {
  position: absolute;
  top: calc(100% + 16px);
  transform: translate(-50%, 0);
  padding: 0.25rem 0.5rem;
  font-size: 0.85rem;
  color: var(--timeline-muted);
  background: transparent;
  border: none;
  cursor: pointer;
}

.timeline-horizontal .timeline-axis-tick::before {
  content: "";
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 14px;
  background: var(--timeline-muted);
  border-radius: 999px;
}

.timeline-horizontal .timeline-axis-tick.is-active {
  color: var(--timeline-primary);
  font-weight: 600;
}

.timeline-horizontal .timeline-axis-tick.is-active::before {
  height: 16px;
  background: var(--timeline-primary);
}

.timeline-horizontal .timeline-controls {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  padding-bottom: 0.5rem;
}

.timeline-horizontal .timeline-nav {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid var(--timeline-border);
  background: #ffffff;
  color: #0f172a;
  font-size: 1.1rem;
  cursor: pointer;
  transition: transform var(--timeline-transition), border-color var(--timeline-transition), background var(--timeline-transition);
}

.timeline-horizontal .timeline-nav:hover,
.timeline-horizontal .timeline-nav:focus-visible {
  border-color: var(--timeline-primary);
  background: var(--timeline-primary-soft);
  outline: none;
  transform: translateY(-2px);
}

.timeline-empty {
  margin: 0;
  padding: 2rem;
  text-align: center;
  color: var(--timeline-muted);
}

@media (max-width: 640px) {
  .timeline-horizontal {
    padding: 0.5rem;
  }

  .timeline-horizontal .timeline-track {
    padding: 0.5rem 1rem 2rem;
  }

  .timeline-horizontal .timeline-card {
    min-height: 240px;
  }
}