Supple custom background image

/* Hide the slider */
#top_banner_wrapper {
    display: none;
}

/* Apply bg image */
body:before,
body:after {
    content: "";
    position: fixed;
    right: 0;
    top: 0;
    left: 0;
    height: 70vh;
}

body:before {
    background: url(http://static.tumblr.com/4901e49e36a898bea54ab0da063e4f35/qqaemog/T1nnpolgb/tumblr_static_20k5vow941fogggkwwskcgggk.jpg) top/cover no-repeat;
    z-index: -2;
}

/* Apply fade (gradient) */
body:after {
    background: -webkit-linear-gradient(transparent, #25292b);
    background: linear-gradient(transparent, #25292b);
    z-index: -1;
}

/* Apply some margin so the image shows through */
#welcome {
    margin-top: 25vh;
}

@media (min-width: 1023px) {
    #welcome {
        margin-top: 50vh;
    }
}