:root{--bg:#f6f5fb;--card:#fff;--ink:#1c1b29;--muted:#6b6880;--brand:#7c5cff;--line:#e6e3f0}
@media (prefers-color-scheme:dark){:root{--bg:#121119;--card:#1c1b27;--ink:#f2f1f8;--muted:#a6a3b8;--brand:#a48bff;--line:#2c2a3a}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:760px;margin:0 auto;padding:32px 16px 64px}
header{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.logo{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#7c5cff,#ff6fa8);display:grid;place-items:center;color:#fff;font-weight:800;font-size:22px}
header a{color:var(--ink);text-decoration:none;font-weight:800;font-size:20px}
nav{margin-left:auto;display:flex;gap:16px;font-size:15px}
nav a{color:var(--muted);text-decoration:none}
nav a:hover{color:var(--brand)}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px 22px}
h1{font-size:30px;line-height:1.2;margin:0 0 6px}
h2{font-size:19px;margin:28px 0 6px}
.muted{color:var(--muted)}
a{color:var(--brand)}
ul{padding-left:20px}
footer{margin-top:28px;font-size:14px;color:var(--muted);text-align:center}