/* ============================================
   TIMELINE — as book chapters
   ============================================ */
.timeline {
  padding: 80px 0;
}
.chapter-list {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
}
.chapter-list::before {
  content: "";
  position: absolute;
  left: 29px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: repeating-linear-gradient(to bottom, var(--gold) 0, var(--gold) 4px, transparent 4px, transparent 9px);
}
.chapter {
  display: flex;
  gap: 24px;
  margin-bottom: 44px;
  position: relative;
  opacity: 0;
  transform: translateX(-16px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}
.chapter.visible {
  opacity: 1;
  transform: translateX(0);
}
.chapter:last-child {
  margin-bottom: 0;
}
.chapter-mark {
  flex: none;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--maroon);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 600;
  color: var(--maroon);
  font-size: 1rem;
  z-index: 2;
  box-shadow: 0 3px 10px rgba(74, 22, 32, 0.15);
}
.chapter-body {
  flex: 1;
  background: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 22px 26px;
  box-shadow: 0 3px 12px rgba(74, 22, 32, 0.08);
}
.chapter-body h3 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--maroon-deep);
  font-size: 1.2rem;
  margin-bottom: 3px;
}
.chapter-date {
  font-family: var(--font-hand);
  color: var(--gold);
  font-size: 1.05rem;
  margin-bottom: 8px;
  display: block;
}
.chapter-body p {
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.65;
}

@media (max-width: 768px) {
  .chapter-list::before {
    left: 23px;
  }
  .chapter {
    gap: 16px;
  }
  .chapter-mark {
    width: 48px;
    height: 48px;
    font-size: 0.85rem;
  }
}