:root{--bg:#fff;--fg:#1d2433;--muted:#5b6475;--line:#e3e7ee;--accent:#1f5eff}@media (prefers-color-scheme:dark){:root{--bg:#10141c;--fg:#e6e9f0;--muted:#9aa4b8;--line:#263044;--accent:#7aa2ff}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}main{max-width:720px;margin:0 auto;padding:32px 16px 80px}
h1{font-size:1.9rem;line-height:1.2;margin:.2rem 0 .4rem}h2{font-size:1.15rem;margin-top:2rem}.sub{color:var(--muted)}a{color:var(--accent)}nav{display:flex;gap:1rem;flex-wrap:wrap;padding:14px 16px;border-bottom:1px solid var(--line)}nav a{text-decoration:none}
footer{border-top:1px solid var(--line);margin-top:3rem;padding-top:1rem;color:var(--muted);font-size:.9rem}ul{padding-left:1.2rem}li{margin:.3rem 0}