:root{--bg:#f7f5f1;--fg:#1f1d1a;--muted:#5d574f;--link:#2f5d8a;--card:#fff;--line:#e4dfd6}
@media (prefers-color-scheme:dark){:root{--bg:#14161c;--fg:#ecebe8;--muted:#a7a49d;--link:#8fb8e8;--card:#1c1f27;--line:#2c303a}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:640px;margin:0 auto;padding:48px 16px}h1{font-size:1.7rem;margin:0 0 .4rem}h2{font-size:1.1rem;margin:1.8rem 0 .4rem}
p,li{color:var(--fg)}.muted{color:var(--muted);font-size:.95rem}a{color:var(--link)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px 24px}footer{margin-top:28px}