/* AV Design System inspired editorial shell */
:root,html[data-theme="light"]{
  --background:#f3f5f9;--foreground:#111827;--card:#ffffff;--border:#d9e0ea;
  --muted-foreground:#5d6779;--primary:#245bff;--secondary:#edf3ff;--destructive:#dc2626;
  --chart-1:#245bff;--chart-2:#24714d;--chart-3:#cb7a14;--chart-4:#7352d8;--chart-5:#dc2626;
  --radius-sm:3px;--radius:6px;--radius-lg:9px;--radius-xl:12px;
  --shadow:0 1px 2px rgba(15,23,42,.05),0 8px 24px rgba(15,23,42,.04);
  --shadow-lg:0 16px 40px rgba(15,23,42,.10),0 2px 8px rgba(15,23,42,.06);
}
html[data-theme="dark"]{
  --background:#0e1014;--foreground:#e6e8ee;--card:#151922;--border:#222a38;
  --muted-foreground:#8a93a6;--primary:#7aa2ff;--secondary:#1c2230;--destructive:#ef4444;
  --chart-1:#7aa2ff;--chart-2:#9be0a7;--chart-3:#fbbf24;--chart-4:#c084fc;--chart-5:#ef4444;
  --shadow:0 6px 20px rgba(0,0,0,.35);--shadow-lg:0 14px 40px rgba(0,0,0,.55);
}
html[data-theme="golden-paper"]{
  --background:#f4ecd9;--foreground:#2a1d09;--card:#fbf5e4;--border:#d9c9a3;
  --muted-foreground:#6b5836;--primary:#c89b37;--secondary:#ebdfbf;--destructive:#a8321b;
  --chart-1:#c89b37;--chart-2:#5d7a3a;--chart-3:#9c6c1f;--chart-4:#7a4a2a;--chart-5:#a8321b;
  --shadow:0 1px 3px rgba(80,60,20,.10);--shadow-lg:0 8px 24px rgba(80,60,20,.16);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--background);color:var(--foreground);font-family:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-size:14px;line-height:1.55;-webkit-font-smoothing:antialiased}
body{display:grid;grid-template-columns:320px 1fr;min-height:100vh;background:
  radial-gradient(circle at top left, color-mix(in srgb,var(--secondary) 70%,transparent), transparent 36%),
  linear-gradient(180deg, color-mix(in srgb,var(--background) 88%,white), var(--background))}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
code,pre,kbd{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace}
.skip-link{position:absolute;left:16px;top:-40px;background:var(--primary);color:#fff;padding:10px 12px;border-radius:var(--radius);z-index:10}
.skip-link:focus{top:16px}
#sidebar{background:color-mix(in srgb,var(--card) 92%,var(--background));border-right:1px solid var(--border);padding:18px 16px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:16px;backdrop-filter:blur(18px);min-width:0}
.brand{display:flex;align-items:center;gap:12px;padding:2px 4px}
.brand-copy{min-width:0}
.brand-row{display:flex;align-items:center;gap:8px}
.logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),color-mix(in srgb,var(--primary) 60%,white));display:flex;align-items:center;justify-content:center;font-weight:600;color:#fff;font-size:13px;letter-spacing:.5px;box-shadow:var(--shadow)}
.brand-title{font-family:"IBM Plex Serif",Georgia,serif;font-size:19px;font-weight:600}
.brand-badge{display:inline-flex;align-items:center;padding:3px 8px;border-radius:999px;background:var(--secondary);border:1px solid color-mix(in srgb,var(--primary) 18%,var(--border));color:var(--primary);font-size:11px;font-weight:600}
.brand-sub{color:var(--muted-foreground);font-size:12px;line-height:1.4;margin-top:2px}
.field-label{display:block;color:var(--muted-foreground);font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;margin:0 0 7px 2px}
.search-wrap input{width:100%;background:var(--background);border:1px solid var(--border);color:var(--foreground);padding:10px 12px;border-radius:10px;outline:none;font-size:13px;font-family:inherit;box-shadow:inset 0 1px 1px rgba(15,23,42,.03)}
.search-wrap input:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 18%,transparent)}
#nav{flex:1;overflow:auto;display:flex;flex-direction:column;gap:12px;padding:2px 0}
.nav-group{display:flex;flex-direction:column;gap:4px}
.nav-group-title{padding:0 10px;color:var(--muted-foreground);font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase}
#nav a{display:flex;align-items:center;min-height:38px;padding:9px 10px;border-radius:10px;color:color-mix(in srgb,var(--foreground) 92%,black);font-size:13px;background:color-mix(in srgb,var(--card) 82%,transparent);border:1px solid color-mix(in srgb,var(--border) 88%,transparent);box-shadow:inset 0 1px 0 rgba(255,255,255,.5)}
#nav a:hover{background:var(--secondary);border-color:color-mix(in srgb,var(--primary) 16%,var(--border));text-decoration:none}
#nav a.active{background:var(--secondary);color:var(--primary);font-weight:600;border:1px solid color-mix(in srgb,var(--primary) 20%,var(--border));box-shadow:0 4px 14px rgba(36,91,255,.08)}
.nav-link-text{display:block;color:inherit;font-weight:600;line-height:1.35}
.nav-empty{padding:10px;color:var(--muted-foreground);font-size:13px;border:1px dashed var(--border);border-radius:10px}
.sidebar-foot{display:flex;flex-direction:column;gap:10px;border-top:1px solid var(--border);padding-top:12px}
.theme-row{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.theme-row button{min-width:0;background:var(--background);border:1px solid var(--border);color:var(--foreground);padding:8px 6px;border-radius:9px;cursor:pointer;font-size:12px;font-family:inherit}
.theme-row button[aria-pressed="true"]{background:var(--primary);color:var(--background);border-color:var(--primary)}
.foot-row{display:flex;gap:6px}
.foot-row a,.foot-row button{flex:1;background:var(--background);border:1px solid var(--border);color:var(--foreground);padding:8px 8px;border-radius:10px;cursor:pointer;font-size:12px;font-family:inherit;text-align:center}
.foot-meta{color:var(--muted-foreground);font-size:11px;letter-spacing:.02em;text-align:center;padding-top:2px}
#main{padding:24px 32px 40px;max-width:1240px;width:100%;min-width:0}
#topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:18px}
.topbar-copy{display:flex;flex-direction:column;gap:6px}
#crumb{color:var(--muted-foreground);font-size:12px;text-transform:uppercase;letter-spacing:.08em}
.section-lead{color:var(--muted-foreground);font-size:14px;max-width:700px}
.top-actions{display:flex;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;background:color-mix(in srgb,var(--card) 78%,transparent);border:1px solid var(--border);padding:7px 12px;border-radius:999px;color:var(--foreground);font-size:12px;backdrop-filter:blur(10px)}
#view{min-height:60vh}
.section-shell{display:flex;flex-direction:column;gap:18px}
.section-header{background:linear-gradient(180deg,color-mix(in srgb,var(--card) 88%,transparent),var(--card));border:1px solid var(--border);border-radius:18px;padding:24px 26px;box-shadow:var(--shadow)}
.section-eyebrow{color:var(--muted-foreground);font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px}
.section-title{font-family:"IBM Plex Serif",Georgia,serif;font-size:34px;font-weight:600;line-height:1.15;margin:0 0 10px;letter-spacing:-.02em}
.section-summary{color:var(--muted-foreground);font-size:15px;line-height:1.6;max-width:760px;margin:0}
.meta-grid,.overview-grid,.signal-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.meta-card,.overview-card,.signal-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px 18px;box-shadow:var(--shadow)}
.meta-label,.overview-label{color:var(--muted-foreground);font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px}
.meta-value{font-family:"IBM Plex Serif",Georgia,serif;font-size:22px;line-height:1.15;margin:0 0 4px}
.meta-note,.overview-note{color:var(--muted-foreground);font-size:13px;line-height:1.5}
.overview-card{display:block;color:inherit;text-decoration:none}
.overview-card:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg);text-decoration:none}
.overview-title{font-family:"IBM Plex Serif",Georgia,serif;font-size:18px;line-height:1.2;margin:0 0 6px}
.signal-list{display:flex;flex-wrap:wrap;gap:8px}
.signal-pill{display:inline-flex;align-items:center;padding:7px 10px;border-radius:999px;background:var(--secondary);border:1px solid color-mix(in srgb,var(--primary) 12%,var(--border));font-size:12px;color:var(--foreground)}
.doc-body{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:28px 32px;box-shadow:var(--shadow);max-width:100%;overflow-x:auto}
.doc-body h1,.doc-body h2,.doc-body h3,.doc-body h4{font-family:"IBM Plex Serif",Georgia,serif;font-weight:600;margin-top:0}
.doc-body h1{font-size:28px;margin-bottom:8px;letter-spacing:-.01em}
.doc-body h2{font-size:21px;margin-top:26px;margin-bottom:8px}
.doc-body h3{font-size:16px;margin-top:18px;margin-bottom:6px}
.doc-body p{margin:8px 0}
.doc-body code{background:var(--secondary);padding:1px 6px;border-radius:var(--radius-sm);font-size:12.5px}
.doc-body pre{background:var(--secondary);padding:12px;border-radius:var(--radius);overflow:auto}
.doc-body ul,.doc-body ol{padding-left:22px}
.doc-body ul.checklist{list-style:none;padding-left:0}
.doc-body ul.checklist li{padding:3px 0;display:flex;gap:8px;align-items:center}
.doc-body table{border-collapse:collapse;width:100%;margin:12px 0;font-size:13px}
.doc-body th,.doc-body td{border:1px solid var(--border);padding:8px 10px;text-align:left;vertical-align:top}
.doc-body th{background:var(--secondary);font-weight:600}
.doc-body blockquote{border-left:3px solid var(--chart-1);margin:12px 0;padding:8px 14px;color:var(--muted-foreground);background:var(--secondary);border-radius:0 var(--radius) var(--radius) 0}
.doc-body a{color:var(--primary)}
@media(max-width:1024px){body{grid-template-columns:1fr}#sidebar{position:relative;height:auto;border-right:0;border-bottom:1px solid var(--border)}#nav{max-height:320px}#main{padding:18px}.meta-grid,.overview-grid,.signal-grid{grid-template-columns:1fr 1fr}}
@media(max-width:720px){#sidebar{padding:14px 16px;gap:12px}#nav{max-height:240px}.brand-title{font-size:18px}#topbar{flex-direction:column}.top-actions{width:100%;flex-wrap:wrap}.chip{justify-content:center}.meta-grid,.overview-grid,.signal-grid{grid-template-columns:1fr}.doc-body,.section-header{padding:20px}.section-title{font-size:28px}.theme-row{grid-template-columns:repeat(3,minmax(0,1fr))}.theme-row button{font-size:11px;padding:8px 4px}}