.pswp__img {
    object-fit: contain;
    background-color: transparent;
}
.pswp__item img {
    object-fit: contain;
}
.pswp__bg {
    /*opacity: 1 !important;*/
}
div.pswp__img--placeholder,
.pswp__img--with-bg {
    background: transparent !important;
}