body{font-family:Arial,sans-serif;background:#f6f2e8;margin:0}
.header{background:#fff;padding:15px;font-size:24px;font-weight:bold;color:#b8860b}
.card{background:#fff;margin:15px;padding:20px;border-radius:20px;box-shadow:0 4px 12px rgba(0,0,0,.08)}
.balance{background:linear-gradient(135deg,#3a2a00,#d4af37);color:#fff}
.btn{display:block;text-align:center;text-decoration:none;background:#1f2937;color:#fff;padding:14px;border-radius:12px;margin-top:10px}
.nav{position:fixed;bottom:0;left:0;right:0;background:#fff;display:flex;justify-content:space-around;padding:12px;border-top:1px solid #ddd}
a{color:inherit}