:root{
  --bg:#050b1c;
  --bg-2:#0a1430;
  --surface:rgba(255,255,255,.04);
  --border:rgba(255,255,255,.09);
  --text:#eaf0ff;
  --muted:#a7b6d6;
  --muted-2:#6f86ac;
  --blue:#245bff;
  --blue-bright:#5b8cff;
  --grad:linear-gradient(120deg,#5b8cff,#245bff);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Manrope',system-ui,-apple-system,'Segoe UI',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(900px 520px at 12% -8%,rgba(36,91,255,.28),transparent 60%),
    radial-gradient(760px 460px at 92% 4%,rgba(91,140,255,.18),transparent 62%),
    linear-gradient(180deg,var(--bg),var(--bg-2) 60%,var(--bg));
}
.container{width:min(880px,92vw);margin:0 auto}
a{color:var(--blue-bright);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(5,11,28,.78);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:11px;color:var(--text);font-size:1.12rem;font-weight:800;text-decoration:none}
.logo:hover{text-decoration:none}
.logo-mark{width:36px;height:36px;border-radius:11px;object-fit:cover}
.logo span{color:var(--blue-bright)}
.nav-links{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.nav-links a{
  font-size:.9rem;font-weight:700;color:var(--muted);
  padding:9px 16px;border-radius:999px;border:1px solid var(--border);
  background:var(--surface);transition:.2s;
}
.nav-links a:hover{color:#fff;border-color:rgba(91,140,255,.45);background:rgba(36,91,255,.14);text-decoration:none}
.nav-links a.active{color:#fff;background:var(--grad);border-color:transparent}

/* doc hero */
.doc-hero{padding:56px 0 26px;border-bottom:1px solid var(--border)}
.doc-hero h1{font-size:clamp(1.7rem,4.6vw,2.5rem);font-weight:800;line-height:1.15;letter-spacing:-.02em}
.doc-hero .meta{margin-top:10px;font-size:.88rem;color:var(--muted-2)}

/* doc body */
.doc{width:min(880px,92vw);margin:0 auto;padding:34px 0 60px}
.lead-box{
  background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--blue);
  border-radius:14px;padding:18px 20px;color:var(--muted);margin-bottom:30px;
}
.toc{
  background:var(--surface);border:1px solid var(--border);border-radius:14px;
  padding:20px 22px;margin-bottom:38px;display:flex;flex-direction:column;gap:7px;
}
.toc b{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted-2);margin-bottom:6px}
.toc a{font-size:.94rem;color:var(--muted);font-weight:600}
.toc a:hover{color:var(--blue-bright)}
.doc h2{
  font-size:1.22rem;font-weight:800;margin:38px 0 12px;padding-top:14px;
  border-top:1px solid var(--border);scroll-margin-top:90px;
}
.doc h3{font-size:1.02rem;font-weight:700;margin:22px 0 8px;color:#dbe6ff}
.doc p{color:var(--muted);margin-bottom:12px}
.doc ul,.doc ol{color:var(--muted);margin:0 0 14px 22px}
.doc li{margin-bottom:7px}
.doc b{color:#dbe6ff}
.doc table{width:100%;border-collapse:collapse;margin:6px 0 18px;font-size:.93rem}
.doc th,.doc td{border:1px solid var(--border);padding:10px 12px;text-align:left;color:var(--muted);vertical-align:top}
.doc th{background:var(--surface);color:#dbe6ff;font-weight:700}
.table-wrap{overflow-x:auto}
.note{
  background:rgba(36,91,255,.09);border:1px solid rgba(91,140,255,.28);
  border-radius:12px;padding:14px 18px;color:var(--muted);margin:16px 0;
}
.sel-text{user-select:text}
.copy{margin-top:34px;color:var(--muted-2);font-size:.9rem}

/* footer */
footer{border-top:1px solid var(--border);padding:34px 0;background:rgba(5,11,28,.6)}
.foot-in{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.foot-links{display:flex;gap:18px;flex-wrap:wrap}
.foot-links a{font-size:.9rem;color:var(--muted);font-weight:600}
.foot-in span{font-size:.88rem;color:var(--muted-2)}

@media(max-width:640px){
  .doc-hero{padding:38px 0 20px}
  .nav-links a{padding:8px 13px;font-size:.85rem}
  .logo{font-size:1rem}
}