:root{--bg:#f4f7fb;--card:#fff;--ink:#14212e;--ink2:#566474;--tint:#1287c7;--line:#e3e9f0}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#0e1620;--card:#16212d;--ink:#eef3f8;--ink2:#9fb0c2;--tint:#4cb6ea;--line:#24313f}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
.wrap{max-width:760px;margin:0 auto;padding:28px 16px 60px}
header{display:flex;align-items:center;gap:12px;margin-bottom:28px}header img{width:48px;height:48px;border-radius:12px}header a{color:inherit;text-decoration:none;font-weight:800;font-size:20px}
nav{margin-left:auto;display:flex;gap:14px;font-size:14px}nav a{color:var(--ink2);text-decoration:none}nav a:hover{color:var(--tint)}
h1{font-size:clamp(28px,6vw,40px);line-height:1.15;margin:8px 0 12px;letter-spacing:-.02em}h2{font-size:20px;margin:30px 0 8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;margin:16px 0}
.lead{color:var(--ink2);font-size:18px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
a{color:var(--tint)}small,.muted{color:var(--ink2)}footer{margin-top:40px;font-size:13px;color:var(--ink2);border-top:1px solid var(--line);padding-top:16px}