:root{--bg:#fff;--fg:#1f2330;--muted:#5b6070;--accent:#5b2bd6;--card:#f5f4fb;--border:#e3e1ee}
@media (prefers-color-scheme:dark){:root{--bg:#161821;--fg:#e8e9ef;--muted:#a3a7b7;--accent:#a98bff;--card:#1f2230;--border:#2e3244}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main,header,footer{max-width:780px;margin:0 auto;padding:0 16px}
header{display:flex;justify-content:space-between;align-items:center;padding-top:20px;padding-bottom:12px}
header a.brand{font-weight:700;font-size:1.15rem;color:var(--fg);text-decoration:none}
nav a{margin-left:16px}
a{color:var(--accent)}
h1{font-size:2rem;line-height:1.2;margin:32px 0 12px}
h2{font-size:1.3rem;margin-top:32px}
.lead{font-size:1.15rem;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:24px 0}
.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:16px}
.card h3{margin:0 0 6px;font-size:1.05rem}
table{border-collapse:collapse;width:100%}
th,td{border:1px solid var(--border);padding:8px;text-align:left}
footer{color:var(--muted);font-size:.9rem;padding-top:32px;padding-bottom:32px;border-top:1px solid var(--border);margin-top:48px}
.embed header,.embed footer{display:none}