:root{--petrol:#005C70;--text:#1d2427;--muted:#5b6a70;--bg:#f6f8f9;--card:#fff;--line:#e2e8ea}
@media (prefers-color-scheme:dark){:root{--petrol:#5fb3c2;--text:#e8eef0;--muted:#9fb0b6;--bg:#0f1517;--card:#172023;--line:#26343a}}
*{box-sizing:border-box}
body{margin:0;font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;color:var(--text);background:var(--bg)}
main{max-width:760px;margin:0 auto;padding:32px 16px 64px}
header{display:flex;align-items:center;gap:14px;margin-bottom:24px}
header img{width:56px;height:56px;border-radius:13px}
header a{color:inherit;text-decoration:none}
h1{font-size:28px;margin:0}
h2{font-size:20px;margin:32px 0 8px;color:var(--petrol)}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;margin:16px 0}
.muted{color:var(--muted);font-size:15px}
a{color:var(--petrol)}
nav{display:flex;gap:16px;flex-wrap:wrap;margin:8px 0 0}
footer{margin-top:48px;color:var(--muted);font-size:14px}