html,
body {
    background: rgb(255, 255, 255);
    height: 100%;
    width: 100%;
}

.center {
    align-items: center;
    display: flex;
    justify-content: center;
    height: 100%;
    width: 100%;
}

@media (prefers-color-scheme: dark) {

    html,
    body {
        background: #323232;
    }
}