/* Section type "timeline" — milestones on a vertical rail with an accent
   dot, the year as a small-caps label. */

.rtsb-section {
  max-width: 1200px;
  margin: 3.5rem auto;
  padding: 0 1.5rem;
}

.rtsb-section__heading {
  margin: 0 0 1.5rem;
  font-family: var(--page-display, var(--font-display));
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.15;
  text-align: center;
  color: var(--page-ink, var(--text-primary));
}

.rtsb-section--empty .rtsb-section__placeholder {
  margin: 0;
  padding: 1.25rem;
  border: 1px dashed var(--page-rule, var(--gray-200));
  border-radius: var(--border-radius);
  text-align: center;
  color: var(--page-muted, var(--text-secondary));
}

.rtsb-timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 0 0 2rem;
  list-style: none;
}

.rtsb-timeline::before {
  content: "";
  position: absolute;
  top: 0.4rem;
  bottom: 0.4rem;
  left: 0.45rem;
  width: 2px;
  background: var(--page-rule, var(--gray-200));
}

.rtsb-timeline__item {
  position: relative;
  padding: 0 0 2rem;
}

.rtsb-timeline__item:last-child {
  padding-bottom: 0;
}

.rtsb-timeline__item::before {
  content: "";
  position: absolute;
  top: 0.35rem;
  left: -2rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--page-accent, var(--accent-color));
  box-shadow: 0 0 0 4px var(--page-paper, var(--white));
}

.rtsb-timeline__when {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--page-accent, var(--accent-color));
}

.rtsb-timeline__title {
  margin: 0 0 0.35rem;
  font-family: var(--page-display, var(--font-display));
  font-size: 1.25rem;
  line-height: 1.25;
  color: var(--page-ink, var(--text-primary));
}

.rtsb-timeline__text {
  margin: 0;
  line-height: 1.6;
  color: var(--page-muted, var(--text-secondary));
}