#page5 {
    padding-top: 5em;
    padding-bottom: 3em;
}

#page5 .bg {
    height: calc(150% + 100px);
    opacity: .05;
    position: absolute;
    bottom: -50%;
    min-width: 100%;
    object-fit: cover;
    mask-image: linear-gradient(to bottom, transparent, black , transparent);
    -webkit-mask-image: linear-gradient(to bottom, transparent, black , transparent);
    filter: invert(1);
}