.history-intro {
  padding-block: var(--section-md) 2rem;
}

.history-intro .large-copy { margin: 0; }

.timeline {
  position: relative;
  padding-block: 2rem var(--section-lg);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 2rem;
  bottom: var(--section-lg);
  width: 1px;
  background: linear-gradient(var(--antique-gold), var(--rule), var(--antique-gold));
}

.timeline-entry {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 70px minmax(0, 1fr);
  align-items: start;
  margin-bottom: clamp(4rem, 7vw, 6.5rem);
}

.timeline-year {
  grid-column: 1;
  padding: .7rem 2.25rem 0 0;
  color: var(--dark-gold);
  font-family: var(--serif-display);
  font-size: clamp(2.8rem, 5vw, 4.7rem);
  line-height: 1;
  text-align: right;
}

.timeline-node {
  grid-column: 2;
  justify-self: center;
  width: 13px;
  height: 13px;
  margin-top: 1.15rem;
  border: 3px solid var(--paper-light);
  border-radius: 50%;
  background: var(--antique-gold);
  box-shadow: 0 0 0 1px var(--antique-gold);
}

.timeline-content {
  grid-column: 3;
  max-width: 500px;
  padding: .45rem 0 0 2.25rem;
}

.timeline-entry--right .timeline-year {
  grid-column: 3;
  padding: .7rem 0 0 2.25rem;
  text-align: left;
}

.timeline-entry--right .timeline-content {
  grid-column: 1;
  grid-row: 1;
  justify-self: end;
  padding: .45rem 2.25rem 0 0;
}

.timeline-content h2 {
  max-width: 15ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2rem, 3.2vw, 3.25rem);
}

.timeline-record {
  padding-block: 1rem;
  border-top: 1px solid var(--rule);
}

.timeline-record h3 {
  margin-bottom: .55rem;
  color: var(--dark-gold);
  font-family: var(--sans);
  font-size: .66rem;
  font-weight: 760;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.timeline-record p {
  margin: 0;
  font-size: .98rem;
  line-height: 1.55;
}

.source-link {
  display: inline-block;
  margin-top: 1rem;
  padding-bottom: .25rem;
  border-bottom: 1px solid var(--antique-gold);
  color: var(--dark-gold);
  font-family: var(--sans);
  font-size: .66rem;
  font-weight: 760;
  letter-spacing: .08em;
  text-decoration: none;
  text-transform: uppercase;
}

.history-sources {
  max-width: 920px;
  padding-bottom: var(--section-lg);
}
.history-sources h2 { max-width: 16ch; margin-bottom: 1.2rem; }
.history-sources p:last-child { max-width: 68ch; font-size: var(--body-md); }

@media (max-width: 1100px) {
  .timeline::before { left: 20px; }
  .timeline-entry,
  .timeline-entry--right {
    grid-template-columns: 40px minmax(0, 1fr);
    margin-bottom: 4rem;
  }
  .timeline-node,
  .timeline-entry--right .timeline-node {
    grid-column: 1;
    grid-row: 2;
    margin-top: .9rem;
  }
  .timeline-year,
  .timeline-entry--right .timeline-year {
    grid-column: 2;
    grid-row: 1;
    padding: 0 0 1.1rem;
    text-align: left;
  }
  .timeline-content,
  .timeline-entry--right .timeline-content {
    grid-column: 2;
    grid-row: 2;
    justify-self: stretch;
    max-width: 680px;
    padding: 0 0 0 1rem;
  }
}

@media (max-width: 560px) {
  .history-intro { padding-top: 3rem; }
  .timeline { padding-bottom: 5rem; }
  .timeline::before { left: 12px; bottom: 5rem; }
  .timeline-entry,
  .timeline-entry--right { grid-template-columns: 26px minmax(0, 1fr); margin-bottom: 3.5rem; }
  .timeline-node,
  .timeline-entry--right .timeline-node { width: 11px; height: 11px; margin-top: .8rem; }
  .timeline-year,
  .timeline-entry--right .timeline-year { font-size: 2.7rem; }
  .timeline-content,
  .timeline-entry--right .timeline-content { padding-left: .75rem; }
  .timeline-content h2 { font-size: 2.2rem; }
}