@import url(https://fonts.googleapis.com/css?family=Open+Sans:300);


section {
  -webkit-column-width: 300px;
     -moz-column-width: 300px;
          column-width: 300px;
  -webkit-column-gap: 5px;
     -moz-column-gap: 5px;
          column-gap: 5px;
  padding: 5px;
}

section img {
  width: 100%;
  cursor: pointer;
}

.lightbox {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  display: none;
  background: #7f8c8d;
  -webkit-perspective: 1000;
          perspective: 1000;
}

.filter {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-filter: blur(20px);
          filter: blur(20px);
  opacity: 0.5;
  background-position: center;
  background-size: cover;
}

.lightbox img {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%) rotateY(0deg);
          transform: translate(-50%, -50%) rotateY(0deg);
  max-height: 95vh;
  max-width: calc(95vw - 100px);
  -webkit-transition: 0.8s cubic-bezier(0.7, 0, 0.4, 1);
  transition: 0.8s cubic-bezier(0.7, 0, 0.4, 1);
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
}


/*.lightbox:hover img{
  transform: translate(-50%, -50%) rotateY(180deg);
}*/

[class^="arrow"] {
  height: 200px;
  width: 50px;
  background: rgba(0, 0, 0, 0.4);
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
  cursor: pointer;
}

[class^="arrow"]:after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%) rotate(-45deg);
          transform: translate(-50%, -50%) rotate(-45deg);
  width: 15px;
  height: 15px;
}

.arrowr {
  right: 0;
}

.arrowr:after {
  border-right: 1px solid white;
  border-bottom: 1px solid white;
}

.arrowl {
  left: 0;
}

.arrowl:after {
  border-left: 1px solid white;
  border-top: 1px solid white;
}

.close {
  position: absolute;
  right: 0;
  width: 50px;
  height: 50px;
  background: rgba(0, 0, 0, 0.4);
  margin: 20px;
  cursor: pointer;
}

.close:after,
.close:before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1px;
  height: 100%;
  background: #e74c3c;
}

.close:after {
  -webkit-transform: translate(-50%, -50%) rotate(-45deg);
          transform: translate(-50%, -50%) rotate(-45deg);
}

.close:before {
  -webkit-transform: translate(-50%, -50%) rotate(45deg);
          transform: translate(-50%, -50%) rotate(45deg);
}