:root{
  --bg:#0b1020;
  --card:#111836;
  --text:#e8eefc;
  --muted:#a8b3d1;
  --brand:#5da9ff;
  --accent:#70e1c8;
  --link:#80b7ff;
  --border:#243055;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:linear-gradient(180deg,#0b1020 0%,#0c1224 100%);color:var(--text);font:16px/1.6 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:980px;margin:0 auto;padding:24px}
.header{
  position:sticky;top:0;z-index:50;
  background:rgba(11,16,32,.7);backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--border);
}
.header .nav{display:flex;align-items:center;gap:18px;padding:12px 0}
.header .nav a{color:var(--text);opacity:.9}
.hero{padding:48px 0 20px}
.hero h1{font-size:28px;margin:0 0 8px}
.hero p{color:var(--muted);margin:0}
.badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}
.badge{display:inline-flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--border);padding:10px 12px;border-radius:12px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0}
@media (max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.grid{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px}
.card h3{margin:0 0 8px;font-size:18px}
.small{color:var(--muted);font-size:13px}
.footer{margin-top:28px;padding:18px 0;border-top:1px solid var(--border);color:var(--muted)}
.btn{display:inline-block;background:linear-gradient(90deg,var(--brand),#6db8ff);color:#081226;border:0;padding:10px 14px;border-radius:10px;font-weight:600}
.btn:hover{filter:brightness(1.05)}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 16px}
.toc a{background:#0f1a38;border:1px solid var(--border);padding:6px 10px;border-radius:999px}
.page h1{margin:0 0 12px}
.section{margin:18px 0}
.section h2{font-size:18px;margin:0 0 8px}
pre.plain{white-space:pre-wrap;word-wrap:break-word;background:#0f1730;border:1px solid var(--border);border-radius:12px;padding:16px;color:var(--text)}