body{margin:0;background:#f1f5f9;color:#0f172a;font:15px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
main{max-width:760px;margin:32px auto;background:#fff;border-radius:12px;padding:32px 40px;box-shadow:0 1px 3px rgba(0,0,0,.08)}
h1{font-size:24px;margin:0 0 4px}h2{font-size:17px;margin:24px 0 6px}.muted{color:#64748b;font-size:13px}a{color:#2563eb}