body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
}

.container {
    text-align: center;
}

#qr-code {
    margin-top: 20px;
    width: 200px;
    height: 200px;
    border: 1px solid #ccc;
}