body{font-family:Arial,sans-serif;background:#f7f7f8;color:#222}.container{max-width:800px;margin:40px auto;padding:20px;background:#fff;border-radius:12px;box-shadow:0 6px 20px #0000000f}.qr{text-align:center;margin:20px 0}input{width:100%;padding:8px;margin-top:8px;border:1px solid #ddd;border-radius:6px}button{padding:8px 12px;border-radius:8px;border:0;background:#111;color:#fff;cursor:pointer}.buttons{margin-top:10px}.status{color:green;margin-top:10px}