.pgallery{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 4px;
}

.pgallery.pswitch .pgallery_image:first-child,
.pgallery:not(.pswitch) .pgallery_image:nth-child(3n + 3),
.pgallery.pswitch .pgallery_image:nth-child(3n + 4) {
    grid-column: span 2; 
}

.pgallery .pgallery_image {
    grid-column: span 1;
}

.pgallery .pgallery_image:only-child{
  grid-column: span 2;
}

.pgallery_image{
  position: relative;
}

a.pgallery_image{
  display: block;
}

@media (max-width:991px){
  .--hidden-mobile{
    display: none;
  }
}