body {
    font-family: Arial, sans-serif;
    background-color: #0f0f0f;
    color: white;
    text-align: center;
    padding: 50px;
}
.container {
    background: #1a1a1a;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
    display: inline-block;
}
input, button {
    margin: 10px;
    padding: 10px;
    font-size: 16px;
}
#qr-container {
    margin-top: 20px;
}