body {
    background-image: url('/assets/iConvert-Rocks-Mock-Site.jpg');
    width: 100vw;
    height: 100vh;
    background-size: 100%;
    margin: 0;
}

@media only screen and (max-width: 660px) {
    body {
        background-image: url('/assets/iConvert-Rocks-Mock-Site-Mobile.jpg');
    }
}