html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
#root {
    width: 100%;
    height: 100%;
    overflow: hidden;
}
body {
    background: #000 url('web_background.webp') no-repeat fixed center center;
    background-size: cover;
}