:root{--bg:#f4f5f8;--fg:#161a24;--mut:#4a5163;--lk:#1b4fd6}
@media(prefers-color-scheme:dark){:root{--bg:#121318;--fg:#ecedf2;--mut:#aab0c0;--lk:#8fb0ff}}
body{margin:0;background:var(--bg);color:var(--fg);font:18px/1.65 -apple-system,system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:720px;margin:0 auto;padding:24px 16px 64px}
h1{font-weight:700;font-size:1.5rem;line-height:1.25;margin:1.2rem 0 .4rem}
h2{font-weight:700;font-size:1.1rem;margin:1.6rem 0 .3rem}
p,li{margin:.4rem 0}
a{color:var(--lk)}
hr{border:0;border-top:1px solid var(--mut);margin:3rem 0;opacity:.4}
.lang{color:var(--mut);font-size:.95rem}
strong{font-weight:700}