/* Shared navigation: native details remain usable without JavaScript. */
.site-header .main-navigation { --navigation-accent:var(--yellow-400); z-index:30; }
.site-header .main-navigation .navigation-groups { display:flex; flex-wrap:wrap; justify-content:center; gap:2px; padding:5px 16px; }
.navigation-group { position:relative; min-width:0; }
.site-header .main-navigation .navigation-direct,.site-header .main-navigation .navigation-category > summary { display:flex; align-items:center; gap:7px; min-height:48px; margin:0; padding:10px 12px; color:#edf7ff; background:transparent; border:0; border-radius:9px; font-size:.84rem; font-weight:750; text-decoration:none; text-transform:none; letter-spacing:normal; cursor:pointer; list-style:none; white-space:nowrap; }
.navigation-category > summary::-webkit-details-marker { display:none; }
.site-header .main-navigation .navigation-direct:hover,.site-header .main-navigation .navigation-direct.active,.site-header .main-navigation .navigation-category > summary:hover,.site-header .main-navigation .navigation-category > summary.is-current-group,.site-header .main-navigation .navigation-category[open] > summary { color:#fff; background:rgba(255,255,255,.12); box-shadow:inset 0 -3px var(--navigation-accent); }
.navigation-category-icon { display:none; }
.navigation-chevron { width:7px; height:7px; margin-left:3px; border:solid currentColor; border-width:0 2px 2px 0; transform:rotate(45deg); transition:transform .18s ease; }
.navigation-category[open] > summary .navigation-chevron { transform:rotate(225deg); }
.site-header .main-navigation .navigation-sub-links { position:absolute; z-index:40; top:calc(100% + 6px); left:0; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:5px; width:390px; max-width:calc(100vw - 32px); padding:12px; color:var(--ink); background:var(--surface-solid); border:1px solid var(--line); border-radius:15px; box-shadow:0 18px 40px rgba(5,30,48,.25); }
.navigation-group:nth-last-child(-n+3) .navigation-sub-links { left:auto; right:0; }
.site-header .main-navigation .navigation-sub-links a { display:flex; align-items:center; min-height:46px; padding:10px 12px; color:var(--ink); background:var(--surface-soft); border:1px solid transparent; border-radius:9px; font-size:.8rem; font-weight:650; white-space:normal; text-transform:none; letter-spacing:normal; overflow-wrap:anywhere; }
.site-header .main-navigation .navigation-sub-links a:hover { color:var(--ink); background:var(--surface); border-color:var(--blue-500); }
.site-header .main-navigation .navigation-sub-links a.active { color:var(--ink); background:color-mix(in srgb,var(--blue-500) 13%,var(--surface-solid)); border-color:var(--blue-500); box-shadow:inset 3px 0 var(--blue-500); }
.site-header .main-navigation :is(a,summary,button,input):focus-visible,.menu-toggle:focus-visible { outline:3px solid #37b7e5; outline-offset:3px; }
.navigation-mobile-heading,.navigation-mobile-tools,.navigation-backdrop { display:none; }
.mobile-bottom-navigation { display:none; }
html:not([data-navigation-ready]) .menu-toggle { display:none; }
.navigation-group[hidden],.site-header .main-navigation .navigation-sub-links li[hidden],.navigation-empty[hidden] { display:none!important; }
.navigation-panel > details > summary { min-height:46px; padding-block:13px; }
.navigation-panel details a { min-height:44px; display:flex; align-items:center; line-height:1.5; }
.navigation-panel details a:focus-visible,.navigation-panel summary:focus-visible,.section-navigation-grid a:focus-visible { outline:3px solid var(--blue-500); outline-offset:-3px; }
.navigation-panel details a.is-current { box-shadow:inset 4px 0 var(--yellow-400); }
@media(max-width:1100px) {
    html[data-navigation-ready] body { padding-bottom:calc(76px + env(safe-area-inset-bottom,0px)); }
    html[data-navigation-ready] .mobile-bottom-navigation { position:fixed; z-index:35; bottom:0; left:0; right:0; display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:4px; padding:7px 10px calc(7px + env(safe-area-inset-bottom,0px)); background:var(--surface-solid); border-top:1px solid var(--line); box-shadow:0 -5px 24px rgba(5,30,48,.13); }
    html.navigation-is-open .mobile-bottom-navigation { display:none; }
    .mobile-bottom-navigation :is(a,button) { display:grid; place-content:center; justify-items:center; gap:3px; min-height:55px; padding:5px; color:var(--muted); background:transparent; border:0; border-radius:11px; text-decoration:none; cursor:pointer; font:inherit; }
    .mobile-bottom-navigation :is(a,button)>span { font-size:1.22rem; line-height:1; font-weight:750; }
    .mobile-bottom-navigation :is(a,button)>b { font-size:.68rem; line-height:1.4; }
    .mobile-bottom-navigation a.is-active,.mobile-bottom-navigation :is(a,button):hover { color:var(--ink); background:color-mix(in srgb,var(--blue-500) 12%,var(--surface-solid)); }
    .mobile-bottom-navigation :is(a,button):focus-visible { outline:3px solid var(--blue-500); outline-offset:-2px; }
    .site-header .menu-toggle { display:flex; align-items:center; justify-content:center; gap:8px; min-width:88px; flex-shrink:0; padding:10px; }
    .menu-toggle-icon { display:grid; gap:4px; }
    .site-header .menu-toggle .menu-toggle-icon { display:grid; gap:4px; height:auto; background:transparent; }
    .site-header .menu-toggle span { margin:0; }
    .site-header .menu-toggle b { position:static; width:auto; height:auto; overflow:visible; clip:auto; font-size:.8rem; }
    .site-header .main-navigation { display:block; position:static; margin:0 12px 12px; border-radius:18px; overflow:visible; }
    html[data-navigation-ready] .site-header .main-navigation { display:none; position:fixed; z-index:2; inset:12px 12px 12px auto; width:min(440px,calc(100vw - 24px)); max-height:calc(100dvh - 24px); margin:0; overflow-y:auto; overscroll-behavior:contain; scrollbar-gutter:stable; color:var(--ink); background:var(--surface-solid); backdrop-filter:none; border:1px solid var(--line); box-shadow:0 20px 70px rgba(3,20,35,.35); }
    html[data-navigation-ready] .site-header .main-navigation.open { display:block; animation:navigation-arrive .18s ease-out; }
    html.navigation-is-open { overflow:hidden; }
    html.navigation-is-open .site-header { z-index:10020; }
    .navigation-backdrop:not([hidden]) { display:block; position:fixed; z-index:1; inset:0; width:100%; height:100%; padding:0; border:0; border-radius:0; background:rgba(4,22,37,.62); backdrop-filter:blur(3px); cursor:pointer; }
    html[data-navigation-ready] .navigation-mobile-heading { position:sticky; top:0; z-index:3; display:flex; align-items:center; justify-content:space-between; gap:16px; padding:20px 20px 14px; color:var(--ink); background:var(--surface-solid); border-bottom:1px solid var(--line); }
    .navigation-mobile-heading small { color:var(--muted); font-size:.73rem; font-weight:750; }
    .navigation-mobile-heading h2 { margin:3px 0 0; font-size:1.35rem; }
    .navigation-close { min-width:44px; min-height:44px; color:var(--ink); background:var(--surface-soft); border:1px solid var(--line); border-radius:12px; cursor:pointer; font-size:1.1rem; }
    html[data-navigation-ready] .navigation-mobile-tools { display:grid; gap:16px; padding:16px 20px 18px; }
    .navigation-current { margin:0; color:var(--muted); font-size:.77rem; line-height:1.6; }
    .navigation-current strong { color:var(--ink); }
    .navigation-shortcuts { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:7px; }
    .site-header .main-navigation .navigation-shortcuts a { display:flex; align-items:center; justify-content:center; min-height:48px; padding:8px 6px; color:var(--ink); background:color-mix(in srgb,var(--blue-500) 10%,var(--surface-solid)); border:1px solid var(--line); border-radius:12px; font-size:.72rem; line-height:1.4; white-space:normal; text-align:center; }
    .navigation-search { display:grid; gap:7px; color:var(--ink); font-size:.8rem; font-weight:750; }
    .navigation-search input { width:100%; min-width:0; min-height:48px; padding:11px 12px; color:var(--ink); background:var(--surface-soft); border:1px solid var(--line); border-radius:11px; font:inherit; font-size:16px; }
    .navigation-empty { margin:0; color:var(--muted); font-size:.83rem; line-height:1.6; }
    .site-header .main-navigation .navigation-groups { display:grid; grid-template-columns:minmax(0,1fr); gap:8px; padding:0 20px 24px; }
    .site-header .main-navigation .navigation-direct,.site-header .main-navigation .navigation-category > summary { min-height:52px; gap:12px; padding:10px 12px; color:var(--ink); background:var(--surface-soft); border:1px solid var(--line); border-radius:12px; font-size:.88rem; white-space:normal; }
    .navigation-category-icon { display:grid; place-items:center; flex:0 0 30px; width:30px; height:30px; color:var(--blue-600); background:color-mix(in srgb,var(--blue-500) 12%,var(--surface-solid)); border-radius:9px; font-size:1.1rem; font-weight:850; }
    .navigation-chevron { margin-left:auto; margin-right:5px; }
    .site-header .main-navigation .navigation-category > summary.is-current-group,.site-header .main-navigation .navigation-direct.active { color:var(--ink); background:color-mix(in srgb,var(--blue-500) 10%,var(--surface-solid)); box-shadow:inset 3px 0 var(--blue-500); }
    .site-header .main-navigation .navigation-category > summary:hover,.site-header .main-navigation .navigation-direct:hover,.site-header .main-navigation .navigation-category[open] > summary { color:var(--ink); background:var(--surface-soft); box-shadow:none; }
    .site-header .main-navigation .navigation-sub-links { position:static; width:auto; max-width:none; display:grid; grid-template-columns:minmax(0,1fr); gap:4px; margin:6px 0 2px 15px; padding:0 0 0 14px; border:0; border-left:2px solid var(--line); border-radius:0; box-shadow:none; background:transparent; }
    .site-header .main-navigation .navigation-sub-links a { min-height:46px; font-size:.84rem; }
}
@media(max-width:660px) { .header-inner { gap:12px; } .brand { width:calc(100% - 108px); } .brand img { width:100%; max-width:100%; object-fit:contain; } }
@media(max-width:600px) {
    .section-navigation-grid { display:grid!important; grid-template-columns:repeat(2,minmax(0,1fr))!important; overflow:visible; }
    .section-navigation-grid a { min-width:0; font-size:.75rem!important; overflow-wrap:anywhere; }
    .left-sidebar .sidebar-sticky .navigation-panel { grid-column:1 / -1; }
}
@media(max-width:420px) { .section-navigation-grid { grid-template-columns:minmax(0,1fr)!important; } }
@keyframes navigation-arrive { from { opacity:0; transform:translateX(16px); } to { opacity:1; transform:translateX(0); } }
@media(prefers-reduced-motion:reduce) { .site-header .main-navigation.open { animation:none!important; } .navigation-chevron { transition:none; } }