/* Supplemental navigation only; approved manuscript sections remain unchanged. */
.chapter-nav { display: flex; flex-wrap: wrap; align-items: stretch; gap: 12px; margin-top: 24px; }
.chapter-nav > h2, .chapter-nav > p { flex: 0 0 100%; margin: 0; }
.chapter-nav > a {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 12px 16px;
  border: 1px solid #846d42; border-radius: 9px;
  background: #10252d; text-align: center;
  font: 700 .94rem/1.35 Arial, Helvetica, sans-serif;
}
.chapter-nav a:focus-visible { outline: 3px solid #f5e0ae; outline-offset: 3px; }
@media (max-width: 650px) {
  .chapter-nav { flex-direction: column; }
  .chapter-nav > h2, .chapter-nav > p { flex-basis: auto; }
  .chapter-nav > a { width: 100%; min-height: 48px; }
}