:root { color-scheme: light dark; --bg:#f3f6fa; --card:#fff; --ink:#172033; --muted:#657089; --line:#d9dfeb; --accent:#315cad; --course:#eaf1ff; --warn:#fff4cf; --visual:#eef5f4; --shadow:rgba(20,30,55,.10); --sidebar:#f8fafd; }
@media (prefers-color-scheme: dark) { :root { --bg:#101522; --card:#181f30; --ink:#eef2ff; --muted:#aab4cc; --line:#303a50; --accent:#9cb2ff; --course:#1c2b4b; --warn:#40371f; --visual:#142925; --shadow:rgba(0,0,0,.34); } }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; overflow-x:hidden; font:16px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Segoe UI",sans-serif; background:var(--bg); color:var(--ink); }
.app-shell { width:min(1800px,calc(100% - 28px)); margin:16px auto 72px; display:grid; grid-template-columns:minmax(230px,270px) minmax(0,1120px) minmax(190px,230px); gap:18px; align-items:start; }
.page-content { min-width:0; width:100%; margin:0; background:var(--card); border:1px solid var(--line); border-radius:20px; padding:clamp(20px,4vw,52px); box-shadow:0 18px 48px var(--shadow); }
.breadcrumbs { margin-bottom:24px; color:var(--muted); }
a { color:var(--accent); text-decoration:none; } a:hover { text-decoration:underline; }
h1,h2,h3 { line-height:1.28; scroll-margin-top:20px; }
h1 { font-size:clamp(2rem,4.3vw,3.4rem); margin:.2em 0 .75em; letter-spacing:-.025em; }
h2 { margin-top:2.2em; border-bottom:1px solid var(--line); padding-bottom:.3em; }
table { border-collapse:collapse; width:100%; display:block; overflow:auto; }
th,td { border:1px solid var(--line); padding:.55em .7em; vertical-align:top; }
th { background:var(--course); }
blockquote { margin:1.2em 0; padding:.75em 1em; border-left:4px solid var(--accent); background:var(--course); }
code { background:rgba(127,127,127,.14); padding:.15em .35em; border-radius:5px; }
pre { overflow:auto; padding:1em; border-radius:10px; background:#111827; color:#edf2f7; }
pre code { background:none; padding:0; }
img { max-width:100%; height:auto; }
.muted { color:var(--muted); }
.page-list { columns:2 320px; }
.site-sidebar,.page-toc { position:sticky; top:16px; max-height:calc(100vh - 32px); overflow:auto; scrollbar-width:thin; border:1px solid var(--line); border-radius:18px; background:var(--card); box-shadow:0 12px 32px var(--shadow); }
.directory-header { position:sticky; top:0; z-index:2; display:flex; align-items:center; justify-content:space-between; gap:10px; padding:15px 16px 12px; border-bottom:1px solid var(--line); background:color-mix(in srgb,var(--card) 94%,transparent); backdrop-filter:blur(14px); }
.directory-title { margin:0; font-size:.98rem; }
.sidebar-brand { display:block; padding:16px 16px 12px; color:var(--ink); font-weight:760; line-height:1.35; }
.sidebar-brand small { display:block; margin-top:3px; color:var(--muted); font-weight:500; }
.site-tree { padding:0 10px 16px; }
.site-tree ul,.page-toc ol { list-style:none; margin:0; padding:0; }
.nav-group { margin:4px 0; }
.nav-group > summary { cursor:pointer; list-style:none; border-radius:10px; padding:8px 9px; font-weight:700; color:var(--ink); }
.nav-group > summary::-webkit-details-marker { display:none; }
.nav-group > summary::before { content:"›"; display:inline-block; width:1em; color:var(--muted); transition:transform .16s ease; }
.nav-group[open] > summary::before { transform:rotate(90deg); }
.nav-group > ul { margin:2px 0 8px 9px; padding-left:10px; border-left:1px solid var(--line); }
.knowledge-subgroup > summary { font-size:.9rem; font-weight:650; color:var(--muted); }
.nav-link { display:block; margin:2px 0; border-radius:9px; padding:6px 9px; color:var(--muted); font-size:.86rem; line-height:1.35; overflow-wrap:anywhere; }
.nav-link:hover { background:var(--course); color:var(--ink); text-decoration:none; }
.nav-link.active { background:var(--course); color:var(--accent); font-weight:750; box-shadow:inset 3px 0 0 var(--accent); }
.page-toc { padding-bottom:12px; }
.page-toc ol { padding:5px 10px 8px; }
.page-toc a { display:block; margin:2px 0; border-radius:9px; padding:6px 8px; color:var(--muted); font-size:.86rem; line-height:1.35; }
.page-toc a:hover,.page-toc a.current { background:var(--course); color:var(--accent); text-decoration:none; }
.toc-empty { margin:8px 16px 16px; color:var(--muted); font-size:.85rem; }
.panel-close { display:none; border:1px solid var(--line); border-radius:999px; background:var(--bg); color:var(--ink); padding:5px 10px; cursor:pointer; }
.mobile-nav-bar { display:none; }
.nav-backdrop { display:none; }
.home-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(210px,1fr)); gap:14px; margin:18px 0 8px; }
.home-card { display:block; min-height:116px; border:1px solid var(--line); border-radius:15px; padding:16px; background:linear-gradient(145deg,var(--card),var(--visual)); color:var(--ink); }
.home-card:hover { border-color:var(--accent); text-decoration:none; transform:translateY(-1px); }
.home-card strong { display:block; color:var(--accent); font-size:1.05rem; }
.home-card span { display:block; margin-top:5px; color:var(--muted); font-size:.88rem; }
.visual-anatomy { margin:18px calc(clamp(20px,4vw,52px) * -.42) 34px; padding:clamp(18px,3vw,32px); border:1px solid var(--line); border-radius:20px; background:linear-gradient(145deg,var(--visual),var(--card)); }
.visual-anatomy > h2 { margin:.05em 0 .25em; border:0; padding:0; font-size:clamp(1.45rem,2.4vw,2rem); }
.visual-intro { margin:.2em 0 1.25em; color:var(--muted); }
.visual-gallery { display:grid; grid-template-columns:repeat(auto-fit,minmax(min(100%,430px),1fr)); gap:22px; }
.atlas-card { overflow:hidden; border:1px solid var(--line); border-radius:16px; background:var(--card); box-shadow:0 10px 28px var(--shadow); }
.atlas-card header { padding:16px 18px 8px; }
.atlas-card h3 { margin:0 0 8px; font-size:1.12rem; }
.badges { display:flex; flex-wrap:wrap; gap:6px; }
.badge { display:inline-flex; align-items:center; border:1px solid var(--line); border-radius:999px; padding:2px 9px; color:var(--muted); font-size:.78rem; background:var(--bg); }
.badge.course-ppt { color:#2454a2; background:var(--course); }
.badge.external-reference { color:#87530b; background:var(--warn); }
.badge.schematic { color:#7a3e9d; background:#f4eaff; }
.badge.confirmed { color:#17623a; background:#e6f6ec; border-color:#a8d8b8; }
.badge.probable { color:#87530b; background:var(--warn); border-color:#d9b45a; }
.image-pair { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:1px; background:var(--line); border-block:1px solid var(--line); }
.image-pair figure { margin:0; background:var(--card); min-width:0; }
.image-pair a { display:flex; min-height:260px; align-items:center; justify-content:center; padding:10px; background:linear-gradient(135deg,rgba(127,127,127,.05),transparent); cursor:zoom-in; }
.image-pair img { width:100%; max-height:520px; object-fit:contain; border-radius:9px; background:white; }
.image-pair figcaption { padding:8px 12px 11px; color:var(--muted); font-size:.84rem; text-align:center; }
.image-missing { min-height:260px; display:grid; place-items:center; padding:24px; color:var(--muted); text-align:center; }
.atlas-meta { padding:12px 18px 16px; }
.atlas-meta p { margin:.35em 0; }
.atlas-source { font-weight:600; }
.atlas-relations { color:var(--muted); font-size:.9rem; }
.visual-status-missing { border:1px dashed #ce9f42; border-radius:14px; padding:24px; background:var(--warn); }
.spatial-summary { display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:10px; margin:0 0 26px; }
.spatial-summary a { border:1px solid var(--line); border-radius:12px; padding:10px 12px; background:var(--card); }
.view-group-title { margin:1.35em 0 .7em; border:0; padding:0; font-size:1.08rem; color:var(--muted); }
dialog.image-lightbox { width:min(96vw,1500px); max-width:none; border:1px solid var(--line); border-radius:16px; padding:12px; background:var(--card); color:var(--ink); }
dialog.image-lightbox::backdrop { background:rgba(5,8,16,.88); }
.lightbox-bar { display:flex; justify-content:space-between; gap:16px; align-items:center; padding:2px 4px 10px; }
.lightbox-close { border:1px solid var(--line); border-radius:999px; background:var(--bg); color:var(--ink); padding:6px 12px; cursor:pointer; }
.image-lightbox img { display:block; margin:auto; max-width:100%; max-height:86vh; object-fit:contain; background:white; border-radius:10px; }
@media (max-width:1199px) {
  .app-shell { display:block; width:min(1120px,calc(100% - 20px)); margin:0 auto 48px; }
  .page-content { margin-top:10px; }
  .mobile-nav-bar { position:sticky; top:0; z-index:20; display:flex; justify-content:space-between; gap:8px; margin-inline:-1px; padding:9px 2px; background:color-mix(in srgb,var(--bg) 92%,transparent); backdrop-filter:blur(14px); }
  .mobile-nav-button { flex:1; border:1px solid var(--line); border-radius:12px; background:var(--card); color:var(--ink); padding:9px 12px; font:inherit; font-weight:700; box-shadow:0 5px 18px var(--shadow); cursor:pointer; }
  .site-sidebar,.page-toc { position:fixed; top:0; bottom:0; z-index:40; width:min(86vw,340px); max-width:calc(100vw - 36px); max-height:none; border-radius:0; transition:transform .2s ease; }
  .site-sidebar { left:0; transform:translateX(-105%); }
  .page-toc { right:0; transform:translateX(105%); }
  body.site-directory-open .site-sidebar,body.page-directory-open .page-toc { transform:translateX(0); }
  .panel-close { display:inline-flex; }
  .nav-backdrop { position:fixed; inset:0; z-index:30; background:rgba(5,8,16,.56); }
  body.site-directory-open .nav-backdrop,body.page-directory-open .nav-backdrop { display:block; }
}
@media (max-width:720px) { .page-content { padding:18px; border-radius:16px; } .image-pair { grid-template-columns:1fr; } .image-pair a { min-height:210px; } .visual-anatomy { margin-inline:0; } h1 { font-size:clamp(1.8rem,9vw,2.5rem); } }