:root{
  --bg:#0b1020; --panel:#11182e; --panel2:#0e1426; --ink:#e7ecf5; --muted:#9aa7c2;
  --line:#1e2942; --brand:#4f8cff; --brand2:#7c5cff; --ok:#2fbf71; --warn:#ffb020;
  --crit:#ff4d5e; --high:#ff7a45; --med:#ffc53d; --low:#36cfc9; --info:#69b1ff;
  --code:#0a0f1f; --chip:#16203a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",Inter,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;font-size:15.5px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
code,pre{font-family:"JetBrains Mono",Consolas,monospace}
code{background:var(--code);padding:2px 6px;border-radius:5px;font-size:.86em;color:#c9d6ff;border:1px solid var(--line)}
pre{background:var(--code);border:1px solid var(--line);border-radius:10px;padding:14px 16px;overflow:auto;font-size:.85em}
/* Layout + fixed sidebar */
.layout{display:flex;min-height:100vh}
.sidebar{width:300px;flex:0 0 300px;background:var(--panel2);border-right:1px solid var(--line);position:sticky;top:0;height:100vh;overflow-y:auto;padding:0 0 40px}
.brandbar{padding:22px 22px 16px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--panel2);z-index:5}
.brandbar .logo{font-size:21px;font-weight:800;margin:0;letter-spacing:.5px;background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent;display:block}
.brandbar .tag{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:1.5px;margin-top:4px}
.nav{padding:12px 10px}
.nav .grp{font-size:11px;text-transform:uppercase;letter-spacing:1.2px;color:var(--muted);margin:16px 12px 6px;font-weight:700}
.nav a{display:block;color:var(--ink);padding:6px 12px;border-radius:7px;font-size:13.4px;border-left:2px solid transparent}
.nav a:hover{background:var(--chip);text-decoration:none}
.nav a.active{background:var(--chip);border-left-color:var(--brand);color:#fff;font-weight:600}
.nav a.sub{font-size:12.8px;color:var(--muted);padding-left:18px}
.nav a.sub:hover{color:var(--ink)}
/* Main content column */
.content{flex:1;min-width:0;max-width:1040px;margin:0 auto;padding:0 48px 120px}
header.page{padding:48px 0 24px;border-bottom:1px solid var(--line);margin-bottom:8px}
header.page .eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:2px;color:var(--brand);font-weight:700}
header.page h1{font-size:36px;margin:8px 0 10px;line-height:1.15}
header.page p.lead{font-size:16.5px;color:var(--muted);margin:0;max-width:760px}
.meta-pills{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}
.pill{background:var(--chip);border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-size:12.5px;color:var(--muted)}
.pill b{color:var(--ink)}
h2{font-size:25px;margin:46px 0 14px;padding-top:14px;border-top:1px solid var(--line)}
h2:first-of-type{border-top:none}
h3{font-size:19px;margin:28px 0 10px;color:#dce6ff}
h4{font-size:15.5px;margin:18px 0 8px;color:#bcd0ff}
p{margin:10px 0}
ul,ol{margin:10px 0 10px 4px;padding-left:22px}
li{margin:5px 0}
.note,.tip,.warn,.danger{border-radius:10px;padding:13px 16px 13px 46px;margin:16px 0;position:relative;border:1px solid var(--line);font-size:14.3px}
.note{background:rgba(105,177,255,.08);border-color:rgba(105,177,255,.35)}
.tip{background:rgba(47,191,113,.08);border-color:rgba(47,191,113,.35)}
.warn{background:rgba(255,176,32,.08);border-color:rgba(255,176,32,.4)}
.danger{background:rgba(255,77,94,.08);border-color:rgba(255,77,94,.4)}
.note::before,.tip::before,.warn::before,.danger::before{position:absolute;left:14px;top:12px;font-size:18px}
.note::before{content:"\2139\FE0F"} .tip::before{content:"\1F4A1"} .warn::before{content:"\26A0\FE0F"} .danger::before{content:"\26D4"}
table{width:100%;border-collapse:collapse;margin:16px 0;font-size:13.8px}
th,td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
th{background:var(--chip);font-weight:700;color:#dce6ff}
tr:nth-child(even) td{background:rgba(255,255,255,.015)}
.sev{display:inline-block;padding:2px 9px;border-radius:6px;font-size:11.5px;font-weight:700}
.sev.c{background:var(--crit);color:#fff} .sev.h{background:var(--high);color:#fff}
.sev.m{background:var(--med);color:#0b1020} .sev.l{background:var(--low);color:#0b1020} .sev.i{background:var(--info);color:#0b1020}
.st{display:inline-block;padding:2px 9px;border-radius:999px;font-size:11.5px;border:1px solid var(--line);background:var(--chip);color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:18px 0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px;display:block}
.card h4{margin:0 0 6px;color:#dce6ff}
.card p{margin:0;font-size:13.6px;color:var(--muted)}
a.card:hover{border-color:var(--brand);text-decoration:none}
a.card .go{display:inline-block;margin-top:10px;font-size:12.5px;color:var(--brand);font-weight:700}
figure{margin:18px 0}
figure img{width:100%;border:1px solid var(--line);border-radius:12px;display:block;box-shadow:0 8px 30px rgba(0,0,0,.35)}
figcaption{font-size:12.5px;color:var(--muted);margin-top:8px;text-align:center}
.shot,.diagram{border:1.5px dashed #33406b;border-radius:12px;background:repeating-linear-gradient(45deg,#0e1426,#0e1426 12px,#10172c 12px,#10172c 24px);padding:30px;text-align:center;color:var(--muted);margin:18px 0;font-size:13.5px}
.shot .lbl,.diagram .lbl{display:inline-block;background:var(--chip);border:1px solid var(--line);border-radius:6px;padding:3px 10px;font-size:11px;letter-spacing:1px;text-transform:uppercase;margin-bottom:8px;color:#9fb3df}
.diagram pre{background:transparent;border:none;text-align:left;display:inline-block;color:#bcd0ff;margin:8px 0 0}
.wf{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:4px 20px 18px;margin:18px 0}
.wf .obj{font-size:13.5px;color:var(--muted)}
.kbd{background:#1b2540;border:1px solid #2c3a63;border-bottom-width:2px;border-radius:5px;padding:1px 7px;font-size:12px;font-family:monospace}
.faqq{font-weight:700;color:#dce6ff;margin:18px 0 4px}
.faqq::before{content:"Q ";color:var(--brand);font-weight:800}
.faqa{margin:0 0 6px}
.faqa::before{content:"A ";color:var(--ok);font-weight:800}
.toc{columns:2;column-gap:30px;margin:10px 0 0}
.toc a{display:block;padding:3px 0}
hr{border:none;border-top:1px solid var(--line);margin:30px 0}
footer{border-top:1px solid var(--line);margin-top:60px;padding:24px 0;color:var(--muted);font-size:13px}
.back{position:fixed;right:24px;bottom:24px;background:var(--brand);color:#fff;border-radius:50%;width:46px;height:46px;display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:0 6px 20px rgba(0,0,0,.4);opacity:.85}
.back:hover{opacity:1;text-decoration:none}
@media(max-width:980px){.sidebar{display:none}.content{padding:0 22px 80px}.toc{columns:1}}
@media print{.sidebar,.back{display:none}body{background:#fff;color:#000}.content{max-width:100%}.card,table,figure img{break-inside:avoid}}