.timeline {
  --timeline-accent: #000;
  --timeline-ink: #111;
  --timeline-muted: #5d5d5d;
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 0 4rem;
  color: var(--timeline-ink);
}

.timeline__list {
  position: relative;
  display: grid;
  gap: 3.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  opacity: 1;
}

.timeline__list::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--timeline-accent);
  content: "";
  transform: translateX(-50%);
}

.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 5rem minmax(0, 1fr);
  align-items: start;
  min-height: 5rem;
}

.timeline__marker {
  grid-column: 2;
  grid-row: 1;
  z-index: 1;
  width: 1rem;
  height: 1rem;
  margin: 0 auto;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--timeline-accent);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.4);
}

.timeline__content {
  grid-column: 1;
  grid-row: 1;
  padding: 1.5rem 2rem;
  border-top: 4px solid var(--timeline-accent);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 0.75rem 2rem rgba(0, 0, 0, 0.16);
  opacity: 0;
  transform: translateX(-2rem);
  transition: opacity 0.7s ease, transform 0.7s ease;
  border-radius: 12px;

  p {
    opacity: 1;
  }
}

.timeline__item:nth-child(even) .timeline__content {
  grid-column: 3;
  transform: translateX(2rem);
}

.timeline__item.is-visible .timeline__content {
  opacity: 1;
  transform: translateX(0);
}

.timeline__year {
  margin: 0 0 0.35rem;
  color: var(--timeline-accent);
  font-family: "Montserrat", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
}

.timeline__content h3 {
  margin-bottom: 1rem;
  color: var(--timeline-ink);
  font-size: clamp(1.15rem, 1.8vw, 1.6rem);
  line-height: 1.15;
  text-transform: uppercase;
}

.timeline__content p:not(.timeline__year) {
  margin-bottom: 0.75rem;
  color: var(--timeline-muted);
  line-height: 1.55;
}

.timeline__content p:last-child {
  margin-bottom: 0;
}

@media (max-width: 767.98px) {
  .timeline {
    padding: 2rem 0 3rem;
  }

  .timeline__list {
    gap: 2rem;
    padding-left: .75rem;
  }

  .timeline__list::before {
    left: .75rem;
  }

  .timeline__item {
    display: block;
    min-height: 0;
    padding-left: 1.5rem;
  }

  .timeline__marker {
    position: absolute;
    top: 1.5rem;
    left: 0;
    width: 0.8rem;
    height: 0.8rem;
    transform: translateX(-50%);
  }

  .timeline__content,
  .timeline__item:nth-child(even) .timeline__content {
    padding: 1.25rem 1rem;
    transform: translateY(1.5rem);
  }

  .timeline__item.is-visible .timeline__content {
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .timeline__content,
  .timeline__item:nth-child(even) .timeline__content {
    transition: none;
    transform: none;
  }
}