/* It seems I need to keep this file at the root to get the url() to work properly. Don't put anything else in here. */
html {
    /* Source: https://css-tricks.com/perfect-full-page-background-image/ */
    /* The rgba() part sets a temporary background color while the image is loading: https://stackoverflow.com/a/5167095/4115031 */
    background: rgba(0,0,0, 0.75) url(images/background.jpg) no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}