html, body {
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 0;
    background: url(/imgs/logo-light.png);
    background-position: 50% 50%;
    background-repeat: no-repeat;
    max-width: 100%;
    max-height: 100%;
}

@media (prefers-color-scheme: dark) {
    html, body {
        background-color: #000000;
        background-image: url(/imgs/logo-dark.png);
        background-position: 50% 50%;
        background-repeat: no-repeat;
    }
}