html {
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    background-color: #222;
    color: #eee;
}

div {
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
    row-gap: 20px;
}

div#divQRCode {
    width: 512px;
    max-width: 90%;
}
    div#divQRCode canvas {
        border-radius: 15px;
        max-width: 100%;
    }
    div#divQRCode.highlight canvas {
        box-shadow: whitesmoke 0 0 8px;
    }

a,
a:hover,
a:visited
{
    text-decoration: none;
    color: inherit;
}