.bg-module {
    border-right: none;
    border-left: none;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 50;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    -webkit-transform-style: preserve-3d;
    transform-style: preserve-3d;
}

.bg-module__bg {
    position: absolute;
    z-index: 45;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    overflow: hidden;
    -webkit-transform-style: preserve-3d;
    transform-style: preserve-3d;
    background: none scroll center center transparent;
    background-size: cover;
    opacity: 1;
}

.bg-module--jsReady .bg-module__bg {
    transition: opacity 3s;
}

.bg-module__bg--fadeout {
    opacity: 0;
}

.bg-module__bg--fadein {
    opacity: 1;
}