html { scroll-padding-top: 80px; }
.reference-header-space { height: 60px; }
.reference-header.reference-header { position: fixed; top: 0; left: 50%; transform: translateX(-50%); width: 100%; height: 60px; box-sizing: border-box; z-index: 60; background: var(--ref-paper, #F8F7F5); }
@media (max-width: 600px) { .reference-header-space, .reference-header.reference-header { height: 65px; } }
.reference-header .reference-menu-toggle { display: none; }
@media (max-width: 600px) {
  .reference-header { position: relative; }
  .reference-header .reference-menu-toggle { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px; border: 0; border-radius: 0; background: transparent; color: var(--ref-ink, #1A1714); font: 500 14px/1.4 var(--ref-sans, 'Reference Instrument Sans', sans-serif); cursor: pointer; }
  .reference-header .reference-menu-toggle:hover, .reference-header .reference-menu-toggle[aria-expanded="true"] { background: transparent; color: var(--ref-accent, var(--accent)); }
  .reference-header .reference-menu-toggle:focus-visible, .reference-header .reference-navigation a:focus-visible { outline: 2px solid var(--ref-accent, var(--accent)); outline-offset: 3px; }
  .reference-header .reference-navigation { display: none; position: absolute; top: 100%; left: auto; right: 20px; width: max-content; max-width: calc(100vw - 40px); z-index: 50; flex-direction: column; align-items: stretch; gap: 0; padding: 6px; border: 1px solid var(--ref-border, #DDD8D0); border-radius: 4px; background: var(--ref-paper, #F8F7F5); box-shadow: 0 6px 18px #00000012; }
  .reference-header .reference-navigation[data-open="true"] { display: flex; }
  .reference-header .reference-navigation a { display: flex; align-items: center; min-height: 44px; padding: 10px 12px; font-size: 15px; color: var(--ref-ink, #1A1714); }
  .reference-header .reference-navigation a:hover { background: color-mix(in srgb, var(--ref-accent, var(--accent)) 8%, transparent); }
}