/* Route-scoped chronological sequence for the 2026 Impact history. */
.timeline-sequence {
  --timeline-year-width: 6.5rem;
  --timeline-gap: 3rem;
  --timeline-line-x: 8rem;
  position: relative;
  margin: clamp(2.5rem, 5vw, 4rem) 0 0;
  padding: 0;
  border-left: 0;
}

.timeline-sequence::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: 0;
  bottom: 0;
  left: var(--timeline-line-x);
  width: 2px;
  background: var(--steel, #8fa8bc);
  transform-origin: top;
}

.timeline-sequence li {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--timeline-year-width) minmax(0, 1fr);
  gap: var(--timeline-gap);
  align-items: start;
  padding: clamp(1.35rem, 2.5vw, 2rem) 0;
  border-top: 1px solid var(--line);
}

.timeline-sequence li:last-child {
  border-bottom: 1px solid var(--line);
}

.timeline-sequence li::before {
  display: none;
  content: none;
}

.timeline-sequence time {
  display: block;
  color: var(--navy);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  font-weight: 700;
  line-height: 1.2;
  transition: color 180ms ease;
}

.timeline-sequence li:last-child time,
.timeline-sequence.is-timeline-complete li:last-child time {
  color: var(--red);
}

.timeline-milestone-title {
  max-width: none;
  margin: 0 0 .3rem;
  color: var(--navy);
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  letter-spacing: 0;
  line-height: 1.3;
}

.timeline-sequence p {
  max-width: 62rem;
  margin: 0;
  color: var(--ink);
}

/* Motion is enabled only after the dedicated script confirms support. */
.timeline-motion-ready .timeline-sequence::before {
  transform: scaleY(0);
}

.timeline-motion-ready .timeline-sequence.is-timeline-visible::before {
  transform: scaleY(1);
  transition: transform 820ms cubic-bezier(.22, 1, .36, 1);
}

.timeline-motion-ready .timeline-sequence li {
  opacity: 0;
  transform: translateY(10px);
}

.timeline-motion-ready .timeline-sequence li.is-timeline-revealed {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 360ms ease, transform 480ms cubic-bezier(.22, 1, .36, 1);
}

.timeline-motion-ready .timeline-sequence.is-timeline-sequencing li:last-child:not(.is-timeline-active) time {
  color: var(--navy);
}

.timeline-motion-ready .timeline-sequence li.is-timeline-active time {
  color: var(--red);
}

@media (max-width: 760px) {
  .timeline-sequence {
    --timeline-line-x: .45rem;
    margin-top: 2.25rem;
  }

  .timeline-sequence li {
    grid-template-columns: 1fr;
    gap: .45rem;
    padding: 1.35rem 0 1.5rem 2.25rem;
  }

  .timeline-sequence time {
    font-size: 1.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .timeline-motion-ready .timeline-sequence::before,
  .timeline-motion-ready .timeline-sequence.is-timeline-visible::before {
    transform: none;
    transition: none;
  }

  .timeline-motion-ready .timeline-sequence li,
  .timeline-motion-ready .timeline-sequence li.is-timeline-revealed {
    opacity: 1;
    transform: none;
    transition: none;
  }
}