/* Codex release: compact, keyboard-accessible primary navigation and reference pages. */
.nav { gap: 16px; }
.nav > .brand { flex-shrink: 0; }
.nav-links { gap: clamp(12px, 1.45vw, 22px); white-space: nowrap; }
.nav-links > a,
.nav-group > summary { display: inline-flex; align-items: center; min-height: 44px; }
.nav-group { position: relative; }
.nav-group > summary { list-style: none; color: var(--muted); cursor: pointer; }
.nav-group > summary::-webkit-details-marker { display: none; }
.nav-group > summary::after { content: '⌄'; margin-left: 6px; color: var(--gold); font-size: 15px; line-height: 1; }
.nav-group[open] > summary, .nav-group > summary:hover { color: var(--gold); }
.nav-group > summary:focus-visible, .nav-links a:focus-visible, .nav-popover button:focus-visible, .codex-page a:focus-visible, .codex-search input:focus-visible { outline: 2px solid var(--gold); outline-offset: 4px; }
.nav-popover {
  position: absolute;
  z-index: 60;
  top: calc(100% + 5px);
  left: -16px;
  display: grid;
  gap: 2px;
  min-width: 210px;
  padding: 9px;
  border: 1px solid var(--line-cool);
  border-radius: 12px;
  background: #181720;
  box-shadow: var(--shadow);
  white-space: normal;
}
.nav-group:last-child .nav-popover { left: auto; right: -12px; }
.nav-popover a, .nav-popover .nav-form button { display: flex; width: 100%; align-items: center; min-height: 42px; padding: 9px 12px; border-radius: 7px; font-size: 16px; line-height: 1.3; text-align: left; }
.nav-popover a:hover, .nav-popover .nav-form button:hover { background: rgba(212,175,55,.11); }
.codex-page { padding-bottom: 80px; }
.codex-hero { max-width: 900px; margin-inline: auto; }
.codex-intro { max-width: 980px; margin: 0 auto 32px; }
.codex-intro p { margin-top: 0; }
.codex-jump { display: flex; flex-wrap: wrap; gap: 10px; }
.codex-jump a { padding: 9px 14px; border: 1px solid var(--line-cool); border-radius: 999px; color: var(--gold); font-size: 16px; }
.codex-jump a:hover { background: var(--gold-soft); }
.codex-search { max-width: 980px; margin: 0 auto 45px; }
.codex-search label { display: block; margin-bottom: 8px; font-weight: 700; }
.codex-search input { width: 100%; min-height: 48px; padding: 11px 14px; border: 1px solid var(--line-cool); border-radius: 9px; outline: none; background: var(--panel); color: var(--text); font: inherit; font-size: 17px; }
.codex-search p { margin: 8px 0 0; color: var(--muted); font-size: 15px; }
.codex-section { padding: 18px 0 48px; scroll-margin-top: 100px; }
.codex-section .section-heading { margin-bottom: 22px; text-align: left; }
.codex-section .section-heading h2 { font-size: clamp(28px, 4vw, 42px); }
.codex-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 17px; }
.codex-card { display: flex; min-width: 0; flex-direction: column; padding: 24px; border: 1px solid var(--line-cool); border-radius: 13px; background: var(--panel); }
.codex-card:hover { border-color: rgba(212,175,55,.6); }
.codex-kind { color: var(--gold); font-size: 12px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.codex-card h3 { margin: 12px 0 10px; font-size: 25px; line-height: 1.2; }
.codex-card p { margin: 0 0 18px; color: var(--muted); font-size: 17px; line-height: 1.5; }
.codex-card-link { margin-top: auto; color: var(--gold); font-size: 16px; font-weight: 700; }
.codex-empty { max-width: 980px; margin: 20px auto; padding: 24px; border: 1px solid var(--line-cool); border-radius: 12px; text-align: center; }
.codex-entry-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 24px; align-items: start; }
.codex-article section + section { margin-top: 30px; padding-top: 28px; border-top: 1px solid var(--line-cool); }
.codex-article h2, .codex-sidebar h2 { margin: 0 0 12px; font-size: 28px; }
.codex-article p { margin: 0; color: var(--muted); font-size: 19px; line-height: 1.68; }
.codex-article p + p { margin-top: 1em; }
.codex-article .codex-editorial-note { margin-top: 35px; padding-top: 20px; border-top: 1px solid var(--line-cool); font-size: 15px; }
.codex-sidebar { display: grid; gap: 18px; }
.codex-sidebar .content-panel { padding: 22px; }
.codex-sidebar h2 { font-size: 24px; }
.codex-sidebar p, .codex-source-list, .codex-related { color: var(--muted); font-size: 16px; line-height: 1.5; }
.codex-source-list, .codex-related { display: grid; gap: 12px; padding-left: 20px; overflow-wrap: anywhere; }
.codex-source-list a, .codex-related a, .codex-back { color: var(--gold); }
.codex-back { padding: 4px 0; font-size: 16px; font-weight: 700; }
[data-codex-card][hidden], [data-codex-section][hidden], .codex-empty[hidden] { display: none !important; }
@media (max-width: 1100px) {
  .nav { padding: 0 20px; flex-wrap: wrap; }
  .menu-button { display: inline-flex; }
  .nav-links { display: none; width: 100%; flex-direction: column; align-items: stretch; gap: 4px; padding-bottom: 18px; white-space: normal; }
  .nav-links.open { display: flex; }
  .nav-links > a, .nav-group > summary { display: flex; min-height: 44px; padding: 8px 12px; }
  .nav-group { width: 100%; }
  .nav-popover, .nav-group:last-child .nav-popover { position: static; left: auto; right: auto; min-width: 0; margin: 0 0 5px 13px; box-shadow: none; }
}
@media (max-width: 760px) {
  .codex-grid { grid-template-columns: 1fr; }
  .codex-entry-layout { grid-template-columns: 1fr; }
  .codex-card { padding: 20px; }
  .codex-article p { font-size: 17px; }
}

/* Give each section within a dated change entry a clear break. */
.change-entry > div > h2:not(:first-child) { margin-top: 44px; }
@media (max-width: 1100px) {
  .nav-links.open { max-height: calc(100dvh - 82px); overflow-y: auto; overscroll-behavior: contain; }
  .nav-popover a, .nav-popover .nav-form button { min-height: 44px; }
}
@media (max-width: 760px) {
  .change-entry > div > h2:not(:first-child) { margin-top: 36px; }
}