.gallery-popup-content img  {
    display: block;
    margin: 0 auto;
}

.product-image-photo    {
    background: #fff;
}

@media (max-width: 767px) {
    .modal-popup.modal-slide.gallery-popup  {
        left: 0 !important;
    }
    .modal-popup.modal-slide.gallery-popup .modal-inner-wrap[class]    {
        background: #fff;
    }
}