.document .imageLink:first-child {
    margin-top: 0;
}
.document .imageLink:last-child {
    margin-bottom: 0;
}

.document .imageLink {
    position: relative;
    display: block;
    width: 100%;
    height: 0;
    margin: 16px 0;
    padding-bottom: 56.25%;
    border-bottom: none;
    transition: 0;
}
.document .imageLink:hover {
    border-bottom: none;
    transition: 0;
}
.document .imageLink img {
    position: absolute;
    object-fit: cover;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    border: none;
}

.document .imageLink > .explanation {
    z-index: 2;
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: #ffffffff;
    background-color: #00000080;
    opacity: 0;
    transition: 0.25s;
}
.document .imageLink > .explanation:hover {
    opacity: 1;
    transition: 0.25s;
}