:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#1f2937;background:#f8fafc}
*{box-sizing:border-box}body{margin:0}main{max-width:760px;margin:0 auto;padding:64px 24px}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:32px;box-shadow:0 8px 30px rgba(0,0,0,.05)}
h1{margin-top:0;font-size:2rem}h2{margin-top:2rem;font-size:1.2rem}p,li{line-height:1.65}
a{color:#2563eb}footer{margin-top:28px;font-size:.92rem;color:#6b7280}nav a{margin-right:18px}.small{color:#6b7280;font-size:.95rem}