body{font-family:Arial,sans-serif;background:#020617;margin:0}.app{max-width:480px;margin:auto;background:#e2e8f0}.hero{background:#020617;color:white;padding:24px}.section{padding:18px}.panel{background:white;border-radius:20px;padding:18px}.nav a{display:block;margin:8px 0}.btn{display:block;background:white;color:black;padding:12px;border-radius:14px;text-decoration:none}