.timeline {
  position: relative;
}

.timeline-track {
  position: absolute;
  top: 32px;
  right: 0;
  left: 0;
  height: 1px;
  background: var(--line);
}

.timeline-track::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 90%;
  height: 3px;
  background: linear-gradient(90deg, var(--mint), rgba(95, 226, 180, 0));
}

.tl-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(24px, 3vw, 48px);
}

.tl-item {
  position: relative;
}

.tl-marker {
  position: relative;
  display: block;
  width: 11px;
  height: 11px;
  margin-bottom: 24px;
  background: var(--bg);
  border: 1px solid var(--mint);
  border-radius: 50%;
}

.tl-marker::after {
  content: "";
  position: absolute;
  inset: 2px;
  background: var(--mint);
  border-radius: 50%;
  box-shadow: 0 0 16px var(--mint);
}

.tl-tag {
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mint);
}

.tl-year {
  display: block;
  margin-bottom: 16px;
  font-family: var(--serif);
  font-size: 64px;
  line-height: 1;
  letter-spacing: -0.02em;
}

.tl-title {
  margin-bottom: 14px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 22px;
  line-height: 1.15;
  color: var(--ink);
  text-wrap: balance;
}

.tl-desc {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-dim);
  text-wrap: pretty;
}

.yearmark {
  position: relative;
  padding: clamp(60px, 9vw, 120px) 0;
  overflow: hidden;
  border-top: 1px solid var(--line);
}

.yearmark-row {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: clamp(16px, 4vw, 56px);
  font-family: var(--serif);
  line-height: 1;
  letter-spacing: -0.04em;
}

.yearmark-row span {
  font-size: clamp(80px, 17vw, 280px);
  color: var(--ink);
}

.yearmark-row .dash {
  font-style: italic;
  font-size: clamp(60px, 14vw, 240px);
  color: var(--mint);
}

.yearmark-cap {
  margin-top: clamp(16px, 3vw, 36px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  text-align: center;
  color: var(--ink-mute);
}

@media (max-width: 760px) {
  .tl-grid {
    grid-template-columns: 1fr;
  }

  .timeline-track {
    display: none;
  }
}