html, body {
    height: 100%;
    margin: 0;
}

body {
    background-image: url("Emily prime space.gif");
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    height: 100%;
}

body {
    scrollbar-highlight-color: crimson;
    color: white;
    text-align: center;
}