@media (max-width: 767px) {
    body.catalog-category-view .modal-popup .modal-content .series_img {
        justify-items: center;
    }

    body.catalog-category-view .modal-popup .modal-content .series_img > a {
        position: relative;
        display: block;
        width: 300px;
        max-width: 100%;
    }

    body.catalog-category-view .modal-popup .modal-content .series_img > a > img {
        display: block;
        width: 100%;
        max-width: 100%;
        height: auto;
    }
}