.multiple-desktop {
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

/* http://nimbupani.com/using-background-clip-for-text-with-css-fallback.html */
.multiple-desktop-text {
    background: -webkit-linear-gradient(transparent, transparent);
    background: -o-linear-gradient(transparent, transparent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

.multiple-mobile-wrapper {
    position: relative;
    height: 100%; 
}

/* http://stackoverflow.com/a/23859719/1221082
 * http://stackoverflow.com/a/23795792/1221082
 */
.multiple-mobile {
    /* old browsers */
    clip: rect(0 auto auto 0);
    clip: rect(0, auto, auto, 0);
    /* ios workaround */
    -webkit-mask-image: -webkit-linear-gradient(top, #fff 0%, #fff 100%);
    /* new browsers */
    -webkit-clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    overflow: hidden;

    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;

    z-index: -1;
}

.multiple-mobile-content {
    height: 100%;
}

.multiple-mobile:before {
    content: '';
    
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}