:root{--accent:#1D4ED8;--text:#1a1a1a;--muted:#595959;--line:#d0d0d0;--bg:#fff;--ground:#f4f4f2}
@media (prefers-color-scheme:dark){:root{--text:#f2f2f2;--muted:#b3b3b3;--line:#3a3a3a;--bg:#111;--ground:#1b1b1b;--accent:#6b8cff}}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--text);font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}
main{max-width:640px;margin:0 auto;padding:32px 16px 64px}
header{display:flex;align-items:center;gap:12px;margin-bottom:24px}
header img{width:44px;height:44px;border-radius:10px}
header a{color:inherit;text-decoration:none;font-weight:700;font-size:18px}
h1{font-size:26px;margin:0 0 12px}h2{font-size:18px;margin:28px 0 8px}
p,li{color:var(--text)}.muted{color:var(--muted);font-size:14px}
a{color:var(--accent)}
.card{background:var(--bg);border:1.5px solid var(--line);border-radius:14px;padding:18px;margin:16px 0}
.btn{display:flex;align-items:center;justify-content:center;min-height:50px;border-radius:12px;background:var(--accent);color:#fff;font-weight:600;text-decoration:none;border:0;width:100%;font-size:16px;cursor:pointer;margin:10px 0}
.btn.secondary{background:transparent;color:var(--text);border:1.5px solid var(--line)}
code{word-break:break-all;font-size:13px}
footer{margin-top:40px;font-size:14px;color:var(--muted);display:flex;gap:16px;flex-wrap:wrap}
[hidden]{display:none!important}