:root{--paper:#FBF6EC;--card:#FFFFFF;--ink:#3D3A4B;--soft:#6B6779;--accent:#2F7FB5;--rule:#E8DFCC}
@media (prefers-color-scheme:dark){:root{--paper:#1C1B26;--card:#26252F;--ink:#F1EDE4;--soft:#B5B0BF;--accent:#7EC4E6;--rule:#3A3946}}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Rounded","Helvetica Neue",sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 20px 64px}
h1,h2{line-height:1.25}
h1{font-size:34px;margin:12px 0 4px}h2{font-size:22px;margin-top:36px}
a{color:var(--accent)}
.lead{color:var(--soft);font-size:19px}
header{display:flex;align-items:center;gap:14px}
header img{width:64px;height:64px;border-radius:14px}
nav{margin:24px 0;display:flex;gap:18px;flex-wrap:wrap;font-weight:600}
.card{background:var(--card);border:1px solid var(--rule);border-radius:16px;padding:18px 20px;margin:14px 0}
li{margin:6px 0}
footer{color:var(--soft);font-size:14px;margin-top:48px}