:root{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#1f2937;background:#f8fafc}
body{margin:0}
header{background:#111827;color:#fff;padding:18px 24px}
nav{max-width:900px;margin:0 auto;display:flex;gap:18px;align-items:center}
nav a{color:#fff;text-decoration:none;opacity:.92}.brand{font-weight:700;margin-right:auto}
main{max-width:900px;margin:56px auto;padding:0 24px}
.card{background:#fff;padding:36px;border-radius:16px;box-shadow:0 8px 30px rgba(15,23,42,.08)}
h1{font-size:42px;margin:0 0 14px;color:#111827}h2{margin-top:28px;color:#111827}
p,li{line-height:1.7}.button{display:inline-block;margin-top:12px;padding:11px 16px;border-radius:10px;background:#2563eb;color:#fff;text-decoration:none}
footer{max-width:900px;margin:40px auto;padding:0 24px 40px;color:#64748b;font-size:14px}