/* The navigation shares the site's monochrome palette and preference state. */
.site-header {
  --navigation-height: 76px;
  --navigation-admin-offset: 0px;
  --navigation-panel-top: calc(var(--navigation-height) + var(--navigation-admin-offset));
  isolation: isolate;
}
.admin-bar .site-header { --navigation-admin-offset: 32px; }
.site-header.is-compact { --navigation-height: 64px; }
.site-header .header-inner {
  position: relative;
  z-index: 2;
  min-height: var(--navigation-height);
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 28px;
  transition: min-height 160ms ease;
}
.site-header .brand { flex: 0 0 auto; min-height: 44px; margin: 0; gap: 10px; font-size: 18px; font-weight: 500; line-height: 1.4; letter-spacing: .01em; }
.site-header .brand img { flex: none; width: 30px; height: 30px; margin: 0; object-fit: contain; }
.site-header .brand-title { display: inline; min-width: 0; }
.site-header .navigation-panel { display: flex; flex: 1 1 auto; min-width: 0; align-items: center; gap: 28px; }
.site-header .primary-nav { display: flex; flex: 1 1 auto; order: 0; width: auto; min-width: 0; margin: 0; padding: 0; justify-content: center; align-items: center; gap: 0; border: 0; font-size: 14px; color: var(--text-secondary); }
.site-header .nav-list { display: flex; justify-content: center; align-items: center; gap: 5px; padding: 0; margin: 0; }
.site-header .nav-item { position: relative; min-width: 0; }
.site-header .nav-list > .nav-item { flex: 0 0 auto; }
.site-header .nav-row { position: relative; display: flex; align-items: center; border-radius: 7px; }
.site-header .nav-link { display: flex; align-items: center; min-width: 44px; min-height: 44px; padding: 10px 13px; border-radius: 7px; font-size: 14px; font-weight: 500; line-height: 1.5; transition: color 140ms ease, background 140ms ease; }
.site-header .nav-label { white-space: nowrap; }
.site-header .nav-list > .nav-item > .nav-row::after { content: ""; position: absolute; bottom: 0; left: 13px; right: 13px; height: 2px; background: var(--text); opacity: 0; transform: scaleX(.45); transform-origin: left; transition: transform 160ms ease, opacity 160ms ease; pointer-events: none; }
.site-header .nav-list > :is(.is-active, .is-ancestor) > .nav-row::after { opacity: 1; transform: scaleX(1); }
.site-header .nav-item:is(.is-active, .is-ancestor) > .nav-row > .nav-link,
.site-header .primary-nav .nav-link[aria-current],
.site-header .primary-nav .nav-link:hover,
.site-header .nav-item.is-open > .nav-row > .nav-link { color: var(--text); }
.site-header .nav-link:hover { background: var(--card); }
.site-header .has-children > .nav-row > .nav-link { padding-right: 2px; }
.site-header .nav-submenu-toggle { display: none; flex: 0 0 44px; width: 44px; height: 44px; padding: 12px; border-radius: 7px; background: transparent; color: var(--text-secondary); line-height: 1; transition: color 140ms ease, background 140ms ease; }
.js .site-header .nav-submenu-toggle { display: inline-flex; align-items: center; justify-content: center; }
.site-header .nav-submenu-toggle svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; transition: transform 160ms ease; }
.site-header .nav-submenu-toggle:hover { background: var(--card); color: var(--text); }
.site-header .nav-item.is-open > .nav-row > .nav-submenu-toggle svg { transform: rotate(180deg); }
.site-header .nav-description { display: block; margin-top: 5px; font-size: 12px; font-weight: 400; line-height: 1.65; color: var(--text-secondary); overflow-wrap: anywhere; }
.site-header .nav-submenu { min-width: 260px; padding: 9px; margin-top: 7px; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-secondary); }
.site-header .nav-submenu .nav-link { display: block; flex: 1 1 auto; width: auto; min-width: 0; min-height: 44px; padding: 13px 14px; color: var(--text); }
.site-header .nav-submenu .nav-label { display: block; white-space: normal; overflow-wrap: anywhere; }
.site-header .nav-submenu .nav-item + .nav-item { border-top: 1px solid var(--border); }
.site-header .nav-submenu .nav-row { margin-block: 3px; }
.js .site-header:not(.is-drawer) .nav-list > .nav-item > .nav-submenu { position: absolute; z-index: 4; top: 100%; left: 0; width: 320px; max-width: calc(100vw - 40px); max-height: calc(100vh - var(--navigation-panel-top) - 32px); max-height: calc(100dvh - var(--navigation-panel-top) - 32px - env(safe-area-inset-bottom, 0px)); margin-top: 10px; overflow-x: hidden; overflow-y: auto; overscroll-behavior: contain; box-shadow: 0 18px 42px -18px #0009; }
.js .site-header:not(.is-drawer) .nav-list > .nav-item:nth-last-child(-n + 2) > .nav-submenu { left: auto; right: 0; }
.site-header .nav-submenu .nav-submenu { position: static; width: auto; min-width: 0; max-width: none; margin: 0 0 9px 14px; padding: 0 0 0 9px; border: 0; border-left: 1px solid var(--border); border-radius: 0; background: transparent; box-shadow: none; }
.site-header .nav-submenu .nav-submenu .nav-link { padding: 11px 12px; }
.js .site-header .nav-submenu { display: none; }
.js .site-header .nav-item.is-open > .nav-submenu { display: block; animation: navigation-reveal 160ms ease both; }
.site-header .navigation-tools { display: flex; flex: 0 0 auto; order: 1; align-items: center; gap: 15px; color: var(--text); }
.site-header .navigation-github { display: inline-flex; align-items: center; gap: 5px; min-height: 44px; padding: 8px 0; font-size: 12px; line-height: 1.5; transition: color 140ms ease; }
.site-header .navigation-github:hover { color: var(--text-secondary); }
.site-header .navigation-github svg { flex: none; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.site-header .site-preferences { padding-left: 15px; border-left: 1px solid var(--border); gap: 4px; }
html:not(.js) .site-header .site-preferences { display: flex; }
html:not(.js) .site-header [data-theme-toggle] { display: none; }
.site-header .navigation-tools > .site-preferences:first-child { padding-left: 0; border-left: 0; }
.site-header .preference-button { font-size: 11px; padding: 8px 10px; border-color: transparent; transition: background 140ms ease, border-color 140ms ease; }
.site-header .preference-button:hover { transform: none; background: var(--card); border-color: var(--border); }
.site-header .preference-button:active { transform: none; }
.site-header .menu-toggle { display: none; flex: 0 0 auto; order: 3; align-items: center; justify-content: center; gap: 10px; width: auto; min-width: 44px; min-height: 44px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 7px; background: transparent; font-size: 12px; color: var(--text); }
.site-header .menu-toggle > span:first-child { position: static; width: auto; height: auto; overflow: visible; clip-path: none; white-space: nowrap; }
.site-header .menu-symbol { position: relative; display: block; flex: none; width: 16px; height: 16px; transform: none; }
.site-header .menu-symbol::before,
.site-header .menu-symbol::after { content: ""; position: absolute; left: 0; right: 0; height: 1.5px; border-radius: 1px; background: currentColor; transition: top 160ms ease, transform 160ms ease; }
.site-header .menu-symbol::before { top: 5px; }
.site-header .menu-symbol::after { top: 10px; }
.site-header.menu-open .menu-symbol { transform: none; }
.site-header.menu-open .menu-symbol::before { top: 7.5px; transform: rotate(45deg); }
.site-header.menu-open .menu-symbol::after { top: 7.5px; transform: rotate(-45deg); }
.site-header .nav-backdrop { display: none; position: fixed; z-index: 1; top: var(--navigation-panel-top); left: 0; right: 0; bottom: 0; width: 100%; padding: 0; border: 0; background: #0005; cursor: default; }
.site-header :is(.brand, .nav-link, .nav-submenu-toggle, .navigation-github, .preference-button, .menu-toggle):focus-visible { outline: 2px solid var(--text); outline-offset: 3px; }

/* Both a small viewport and an overfull custom menu use this disclosure. */
.js .site-header.is-drawer .header-inner { justify-content: space-between; }
.js .site-header.is-drawer .brand { flex: 0 1 auto; min-width: 0; margin-right: auto; }
.js .site-header.is-drawer .brand-title { overflow-wrap: anywhere; }
.js .site-header.is-drawer .menu-toggle { display: inline-flex; }
.js .site-header.is-drawer .navigation-panel { position: absolute; z-index: 3; top: calc(100% + 12px); left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; width: auto; max-height: calc(100vh - var(--navigation-panel-top) - 28px); max-height: calc(100dvh - var(--navigation-panel-top) - 28px - env(safe-area-inset-bottom, 0px)); margin: 0; padding: 15px; padding-bottom: calc(15px + env(safe-area-inset-bottom, 0px)); overflow-x: hidden; overflow-y: auto; overscroll-behavior: contain; border: 1px solid var(--border); border-radius: 12px; background: var(--bg); box-shadow: 0 20px 60px -25px #000a; }
.js .site-header.is-drawer.menu-open .navigation-panel { display: flex; animation: navigation-reveal 160ms ease both; }
.js .site-header.is-drawer.menu-open .nav-backdrop { display: block; }
.js .site-header.is-drawer .primary-nav { display: block; width: 100%; flex: none; margin: 0; padding: 0; border: 0; }
.js .site-header.is-drawer .nav-list { display: block; }
.js .site-header.is-drawer .nav-list > .nav-item + .nav-item { border-top: 1px solid var(--border); }
.js .site-header.is-drawer .nav-list > .nav-item > .nav-row { min-height: 55px; }
.js .site-header.is-drawer .nav-link { flex: 1 1 auto; padding: 13px 12px; font-size: 16px; }
.js .site-header.is-drawer .nav-label { white-space: normal; overflow-wrap: anywhere; }
.js .site-header.is-drawer .nav-list > .nav-item > .nav-row::after { top: 17px; bottom: 17px; left: 0; right: auto; width: 2px; height: auto; transform: none; }
.js .site-header.is-drawer .nav-submenu { position: static; width: auto; min-width: 0; max-width: none; margin: 0 0 12px 12px; padding: 4px 8px; border: 0; border-left: 1px solid var(--border); border-radius: 0; background: transparent; box-shadow: none; }
.js .site-header.is-drawer .nav-submenu .nav-link { padding: 12px; font-size: 14px; }
.js .site-header.is-drawer .nav-submenu .nav-description { font-size: 12px; }
.js .site-header.is-drawer .nav-submenu .nav-item + .nav-item { border-top: 0; }
.js .site-header.is-drawer .navigation-tools { flex: none; flex-wrap: wrap; justify-content: space-between; gap: 10px; margin-top: 14px; padding: 14px 10px 0; border-top: 1px solid var(--border); }
.js .site-header.is-drawer .navigation-github { font-size: 13px; }
.js .site-header.is-drawer .site-preferences { margin-left: auto; padding-left: 0; border-left: 0; }
.js .site-header.is-drawer .preference-button { border-color: var(--border); font-size: 12px; }
.js .site-header.is-drawer [data-theme-label] { position: static; width: auto; height: auto; overflow: visible; clip-path: none; white-space: normal; }

/* Native lists remain usable when scripting is unavailable. */
html:not(.js) .site-header { position: relative; top: auto; }
html:not(.js) .site-header .header-inner { align-items: flex-start; padding-block: 14px; }
html:not(.js) .site-header .navigation-panel { align-items: flex-start; }
html:not(.js) .site-header .nav-list { flex-wrap: wrap; justify-content: flex-start; }
html:not(.js) .site-header .nav-submenu { min-width: 0; max-width: 320px; }
html:not(.js) .site-header .navigation-tools { align-items: flex-start; }
.footer-nav .footer-menu { display: flex; flex-wrap: wrap; align-items: center; gap: 30px; margin: 0; padding: 0; }
.footer-nav .footer-menu a { display: inline-flex; align-items: center; gap: 7px; min-height: 44px; }
.footer-nav .footer-menu a:hover,
.footer-nav .footer-menu a[aria-current] { color: var(--text); }

@keyframes navigation-reveal { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 1023px) {
  .site-header { --navigation-height: 72px; }
  .site-header.is-compact { --navigation-height: 64px; }
  .site-header .header-inner { width: auto; margin-left: max(20px, env(safe-area-inset-left, 0px)); margin-right: max(20px, env(safe-area-inset-right, 0px)); gap: 16px; }
  .site-header .brand { font-size: 17px; gap: 9px; }
  .site-header .brand img { width: 28px; height: 28px; }
  .js .site-header:not(.navigation-ready) .navigation-panel { display: none; }
  html:not(.js) .site-header .header-inner { flex-wrap: wrap; }
  html:not(.js) .site-header .navigation-panel { flex: 1 0 100%; flex-direction: column; align-items: stretch; gap: 12px; }
  html:not(.js) .site-header .primary-nav { justify-content: flex-start; }
  html:not(.js) .site-header .nav-list { display: block; }
  html:not(.js) .site-header .nav-label { white-space: normal; overflow-wrap: anywhere; }
  html:not(.js) .site-header .nav-submenu { margin-right: 12px; }
}
@media (max-width: 782px) { .admin-bar .site-header { --navigation-admin-offset: 46px; } }
@media (max-width: 600px) { .admin-bar .site-header { --navigation-admin-offset: 0px; } }
@media (max-width: 380px) {
  .js .site-header.is-drawer .navigation-panel { padding: 11px; padding-bottom: calc(11px + env(safe-area-inset-bottom, 0px)); }
  .js .site-header.is-drawer .navigation-tools { padding-inline: 4px; }
  .js .site-header.is-drawer .preference-button { padding-inline: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  .site-header *, .site-header *::before, .site-header *::after { transition: none !important; animation: none !important; }
}