/**
 * Default CSS
 */
div#pdfbpg-gallery .pdfb-tile {
    width: 25%;
    display: inline-block;
    overflow: hidden;
}
div#pdfbpg-gallery .pdfb-tile img{
    width: 100%;
    max-width: 100%;
    height:250px;
    object-fit:contain;
    transition: 0.5s all;
}
div#pdfbpg-gallery .pdfb-tile:hover img{
    transform: scale(1.1,1.1);
}