#face2qr-tool {
    max-width: 500px;
    margin: 20px auto;
    text-align: center;
    font-family: Arial, sans-serif;
}

#face2qr-tool input, #face2qr-tool select {
    width: 100%;
    margin: 5px 0 10px;
    padding: 8px;
}

#face2qr-tool button {
    padding: 8px 15px;
    margin: 5px;
    cursor: pointer;
}