/* In-page calendar navigation (mobile-friendly) */
.section-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1rem;
  background-color: #ffffff;
  border-bottom: 1px solid #E8E2DA;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.section-nav a {
  flex: 0 0 auto;
  padding: 0.6rem 1.2rem;
  font-size: 1.4rem;
  font-weight: 600;
  color: #635343;
  background: #FCFAF7;
  border: 1px solid #E3D7C9;
  border-radius: 999px;
  white-space: nowrap;
}

.section-nav a:hover,
.section-nav a:focus,
.section-nav a:active {
  background: #F2EADF;
}

/* Ensure anchored headings are visible below sticky nav */
body.classroom .wrap main section.content h3 {
  scroll-margin-top: 6.5rem;
}