:root{
  --bg:#080a0e;--ink:#f5f3ef;--muted:#a3a6af;--faint:#7d828d;
  --line:rgba(255,255,255,.14);--coral:#ff6b6b;--teal:#0ea5a4;
  --surface:#12141a;--surface-2:#15171e;
  --sans:"DM Sans","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:clip}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:2px solid var(--coral);outline-offset:3px;border-radius:3px}
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px clamp(18px,5vw,64px);border-bottom:1px solid var(--line);background:rgba(8,10,14,.9);backdrop-filter:blur(14px)}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;letter-spacing:.02em}
.brand img{width:28px;height:28px;object-fit:contain;border-radius:7px}
.back-link{display:inline-flex;align-items:center;gap:7px;font:11px var(--mono);color:var(--muted)}
.back-link svg{width:14px;height:14px}
.back-link:hover{color:var(--ink)}
main{padding:clamp(36px,7vw,80px) clamp(18px,5vw,64px) clamp(48px,9vw,96px)}
.article{max-width:820px;margin:0 auto}
.doc-head{border-bottom:1px solid var(--line);padding-bottom:26px;margin-bottom:34px}
.badge{display:inline-flex;align-items:center;gap:7px;padding:5px 11px;border:1px solid var(--teal);border-radius:999px;color:var(--teal);font:10px var(--mono);letter-spacing:.12em}
.doc-head h1{font-size:clamp(2rem,5vw,3.1rem);line-height:1.06;letter-spacing:-.04em;margin:18px 0 12px;font-weight:760}
.doc-head .lede{color:var(--muted);max-width:34rem;margin:0}
.doc-meta{display:flex;flex-wrap:wrap;gap:6px 18px;color:var(--muted);font:11px var(--mono);margin-top:18px}
.doc-meta span b{color:var(--ink);font-weight:600}
.doc-body h2{font-size:clamp(1.25rem,2.4vw,1.6rem);letter-spacing:-.02em;margin:44px 0 14px;padding-left:12px;border-left:3px solid var(--coral)}
.doc-body h3{font-size:1.06rem;margin:26px 0 10px;color:#e7e4de}
.doc-body p{color:#c9cbd1;margin:0 0 14px}
.doc-body ul,.doc-body ol{margin:0 0 18px;padding-left:22px;color:#c9cbd1}
.doc-body li{margin:7px 0}
.doc-body li::marker{color:var(--teal)}
.doc-body strong{color:var(--ink)}
.doc-body .highlight{color:var(--coral)}
.note{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:14px 16px;color:var(--muted);font-size:13px;margin:20px 0}
.note strong{color:var(--ink)}
.back-top{display:inline-flex;align-items:center;gap:7px;margin-top:30px;font:11px var(--mono);color:var(--muted)}
.back-top:hover{color:var(--ink)}
footer{padding:30px clamp(18px,5vw,64px) 48px;border-top:1px solid var(--line);color:var(--muted);font:11px var(--mono)}
.footer-inner{max-width:820px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px 20px;flex-wrap:wrap}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 16px}
.footer-links a:hover{color:var(--ink)}
.footer-meta{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;color:var(--muted)}
.footer-meta .footer-copyright{color:#c9cbd1;white-space:nowrap}
.footer-meta a{white-space:nowrap}
.footer-meta a:hover{color:var(--ink)}
@media(max-width:640px){
  .topbar{padding:12px 18px}
  main{padding-left:18px;padding-right:18px}
  .doc-head h1{font-size:1.9rem}
}