/* ---------- headings ---------- */

.doc-title {
  font-size: clamp(1.6rem, 4.5vw, 2.4rem);
  line-height: 1.15;
  margin: 0 0 0.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h2.chapter {
  font-family: var(--sans);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 3rem 0 1.25rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}

.prose h2.chapter {
  margin-top: 2.05rem;
}

h2.chapter:first-child {
  margin-top: 0;
}

.prose h2.chapter:first-child {
  margin-top: 0;
}

h2.chapter {
  margin: 1.1rem 0 1.1rem;
}

.prose h2.chapter {
  margin-top: 2.05rem;
}

/* ============ the rail column belongs to the citations alone ============ */

@media (min-width: 1040px) {
  /* headings and their rules stop at the edge of the text column */
  .railzone h2.chapter {
    max-width: calc(3.5rem + 1.25rem + 36rem);
  }
  /* the rule above a citation list spans the whole rail column */
  .citedby {
    padding: 0.5rem 0 0;
  }
}

h2.chapter .tn {
  color: var(--state-lift);
}

/* tighter section breaks inside articles */
.prose h2.chapter {
  margin-top: 1.75rem;
}