.gallery .gallery-category{display: inline-block; margin: 0 10px; font-size: 24px; cursor: pointer;}

.gallery .mansory .gallery-item{width: 0; height: 0px; position: absolute; overflow: hidden; transition: 0.5s;}
.gallery .mansory .gallery-item.active{width: 33.33333%;}
.gallery .mansory .gallery-item .image{height: auto;}

@media (max-width: 768px){
    .gallery .mansory .gallery-item.active{width: 100%;}
}