#yangthang-lightbox-overlay {
  position: fixed;
  display: none;
  top:0;left:0;right:0;bottom:0;
  background: rgba(0,0,0,0.8);
  align-items:center;
  justify-content:center;
  z-index:9999;
}
#yangthang-lightbox-overlay img {
  max-width:90%;
  max-height:90%;
}
.yangthang-gallery img {
  margin:10px;
  cursor:pointer;
}