body {
    background-image: linear-gradient(to bottom, rgba(255,255,255,0.8) 0%,rgba(255,255,255,0.9) 100%),url("audio_cassette.svg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    }
html {
    height: 100%;
    width: 100%;
}
div#blurb {
    position: fixed;
    top: 50%;
    left: 50%;
    /* bring your own prefixes */
    transform: translate(-50%, -50%);
    text-align: center;
    font-size: 5.5vw;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    color: orange;;
}