#landing-bg {
    position: relative;
    background-image: url("/jakarta.faces.resource/images/landing-page/landing-bg.png.xhtml");
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: local;
    box-shadow: inset 0 0 0 1000px rgba(0, 0, 0, 0.45);
    animation: diagonal-move-anim 10s cubic-bezier(0.42, 0, 0.58, 1) infinite alternate;
}

@keyframes diagonal-move-anim {
    0% {
        background-position: 40% 0;
    }
    100% {
        background-position: 100% 100%;
    }
}