* {
            box-sizing: border-box;
        }

        .container .gallery a img {
            float: left;
            width: 33.33%;
            height: auto;
            border: 2px solid #fff;
            -webkit-transition: -webkit-transform .15s ease;
            -moz-transition: -moz-transform .15s ease;
            -o-transition: -o-transform .15s ease;
            -ms-transition: -ms-transform .15s ease;
            transition: transform .15s ease;
            position: relative;
        }

        .clear {
            clear: both;
        }
		
		@media only screen and (max-width: 600px) {
		  .container .gallery a img  {
			width: 50%;
		  }
		}