:root {
    color-scheme: light dark;
}

body {
    background-color: light-dark(#efedea, #232323);
    color: light-dark(#232323, #efefec);
    overflow: hidden;
}

.main {
    align-items: center;
    display: flex;
    height: 100vh;
    justify-content: center;
}

.main > img {
    display: block;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}