.gallery {
    margin-top: 20px;
    column-count: 3;
}

.gallery-image {
    margin-bottom: 20px;
    background-color: #eee;
}

.gallery-image-pdf {
}

.gallery-image a {
    width: 100%;
}

.gallery-image a img {
    width: 100%;
}

@media only screen and (max-width: 719px) {
    .gallery {
        column-count: 1;
    }
}