.timeline {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 14% 0%, rgba(215, 166, 66, 0.1), transparent 34%),
    radial-gradient(circle at 88% 18%, rgba(42, 107, 84, 0.18), transparent 36%),
    linear-gradient(180deg, var(--section-surface-dark-alt) 0%, var(--section-surface-dark) 100%);
}

.timeline__atmosphere {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.03), transparent 40%, transparent 60%, rgba(255, 255, 255, 0.02));
  opacity: 0.6;
}

.timeline__inner {
  position: relative;
  z-index: 1;
}

.timeline__layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.88fr) minmax(0, 1.12fr);
  gap: clamp(var(--space-xl), 5vw, var(--space-3xl));
  align-items: start;
}

.timeline__layout--track-only {
  grid-template-columns: 1fr;
}

.timeline__aside {
  position: sticky;
  top: calc(var(--space-2xl) + 88px);
}

.timeline__title {
  position: relative;
  margin: 0 0 var(--section-header-gap);
  padding-top: calc(var(--section-header-gap) + 6px);
  color: var(--color-text-light);
}

.timeline__title::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 3px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-brand-gold), rgba(215, 166, 66, 0.35));
}

.timeline__title.h1 {
  font-size: var(--fs-h1);
}

.timeline__title.h2 {
  font-size: var(--fs-h2);
}

.timeline__intro {
  max-width: var(--section-intro-max);
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.75;
}

.timeline__intro p + p {
  margin-top: var(--space-md);
}

.timeline__main {
  min-width: 0;
}

.timeline__track {
  position: relative;
  padding-left: 28px;
}

.timeline__spine {
  position: absolute;
  top: 0.5rem;
  bottom: 0.5rem;
  left: 0;
  width: 2px;
  transform: translateX(-50%);
  pointer-events: none;
}

.timeline__spine-line {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(255, 255, 255, 0.14) 10%,
    rgba(215, 166, 66, 0.55) 50%,
    rgba(255, 255, 255, 0.14) 90%,
    transparent 100%
  );
  transform-origin: top center;
  transform: scaleY(0);
}

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

.timeline__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: start;
  background: none;
}

.timeline__marker {
  display: flex;
  justify-content: center;
  width: 28px;
  margin-left: -28px;
  padding-top: 0.35rem;
}

.timeline__node {
  position: relative;
  width: 12px;
  height: 12px;
  display: grid;
  place-items: center;
}

.timeline__node-core {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-brand-gold);
  box-shadow: 0 0 0 3px rgba(215, 166, 66, 0.14);
  transform: scale(0);
}

.timeline__card {
  position: relative;
  padding: var(--space-md) 0 var(--space-lg);
  background: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
  transform: translateY(16px);
  opacity: 0;
}

.timeline__card-accent {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.14);
  transform-origin: left center;
  transition:
    background var(--duration-normal) var(--ease-out-expo),
    height var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo);
}

.timeline__card:hover .timeline__card-accent,
.timeline__card:focus-within .timeline__card-accent {
  height: 3px;
  background: linear-gradient(90deg, var(--color-brand-gold), var(--color-brand-green-light));
  box-shadow: 0 0 16px rgba(215, 166, 66, 0.35);
  transform: scaleX(1);
}

.timeline__content {
  padding-top: var(--space-sm);
}

.timeline__item-date {
  margin: 0 0 var(--space-sm);
  padding: 0;
  border: none;
  background: none;
  color: var(--color-brand-gold);
  font-family: var(--font-secondary);
  font-size: var(--fs-h5);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-normal);
  line-height: 1.2;
  text-transform: uppercase;
}

.timeline__item-body {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  line-height: 1.7;
}

.timeline__item-body p + p {
  margin-top: var(--space-md);
}

.timeline__item-details {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.timeline__item-subtitle {
  margin: 0 0 var(--space-xs);
  font-size: var(--fs-body);
  color: var(--color-text-light);
}

.timeline__item-subtext {
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.65;
}

.timeline__item-subtext p + p {
  margin-top: var(--space-sm);
}

.timeline[data-timeline-ready="true"] .timeline__card {
  transform: translateY(0);
  opacity: 1;
}

.timeline[data-timeline-ready="true"] .timeline__node-core {
  transform: scale(1);
}

@media (max-width: 960px) {
  .timeline__layout {
    grid-template-columns: 1fr;
    gap: var(--section-block-gap);
  }

  .timeline__aside {
    position: static;
  }
}

@media (max-width: 640px) {
  .timeline__track {
    padding-left: 22px;
  }

  .timeline__spine {
    left: 0;
  }

  .timeline__marker {
    width: 22px;
    margin-left: -22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .timeline__card,
  .timeline__node-core,
  .timeline__spine-line {
    transform: none;
    opacity: 1;
  }

  .timeline__card-accent {
    transition: none;
  }
}