:root{
  --bg:#0f1220;--card:#14182b;--ink:#e9ecff;--muted:#a9b0d9;--bord:#1f2440;
  --code:#0b0e1a;--accent:#7c8cff;--ok:#62d394;--warn:#ffcc66;--err:#ff7a7a;
}
*{box-sizing:border-box} body{margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;background:#0e1120;color:var(--ink)}
header{padding:46px 18px 12px;text-align:center}
h1{margin:0;font-size:clamp(26px,3.2vw,40px)}
p.lead{max-width:900px;margin:10px auto 0;color:var(--muted)}
main{max-width:980px;margin:0 auto;padding:18px}
section{background:var(--card);border:1px solid var(--bord);border-radius:18px;padding:20px;margin:16px 0;box-shadow:0 20px 60px rgba(0,0,0,.25)}
h2{margin:0 0 12px;font-size:22px} h3{margin:16px 0 8px;font-size:18px}
pre{background:var(--code);color:#e7eaff;border:1px solid var(--bord);border-radius:12px;padding:14px;overflow:auto}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
ol{padding-left:22px;margin:0} li{margin:8px 0}
.note,.ok,.warn,.err{border:1px solid var(--bord);border-left:6px solid var(--accent);background:#11162b;border-radius:12px;padding:12px 14px;margin:10px 0}
.ok{border-left-color:var(--ok)} .warn{border-left-color:var(--warn)} .err{border-left-color:var(--err)}
kbd{background:#1b2040;border:1px solid var(--bord);padding:0 .45rem;border-radius:6px}
.small{color:var(--muted);font-size:.95em}
.grid{display:grid;gap:14px} @media(min-width:880px){.grid{grid-template-columns:1fr 1fr}}
ul.tight{margin:0;padding-left:18px}
a{color:#9eb3ff}