:root{--bg:#F7F5FF;--card:#fff;--ink:#1E1B3A;--sub:#5B5878;--purple:#6C3CF0;--line:#ECE8FB}
@media (prefers-color-scheme:dark){:root{--bg:#14122B;--card:#1E1B3A;--ink:#F1EEFF;--sub:#B9B4D8;--purple:#A78BFA;--line:#322E5C}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 16px 64px}.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:24px;margin:16px 0}
h1{font-size:32px;line-height:1.2;margin:8px 0 4px}h2{font-size:21px;margin:28px 0 6px}p,li{color:var(--ink)}.sub{color:var(--sub)}a{color:var(--purple);font-weight:600}
ul{padding-left:20px}nav a{margin-right:16px}footer{color:var(--sub);font-size:14px;margin-top:32px}