.gallery_single_modal{
    display: none;
    transition: all 0.4s;
    position: absolute;
}
.gallery_single_modal.activ{
    position: fixed;
    display: flex;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 999;
}
.popup-gallery a {
    display: flex;
    width: 0;
    height: 0;
  }