.content {
  -moz-column-count: 3;
  -moz-column-gap: 10px;
  -webkit-column-count: 3;
  -webkit-column-gap: 10px;
  column-count: 3;
  column-gap: 10px;
}

@media only screen and (max-width: 599px),
only screen and (max-device-width: 599px) {
  .content {
    -moz-column-count: 2;
    -moz-column-gap: 10px;
    -webkit-column-count: 2;
    -webkit-column-gap: 10px;
    column-count: 2;
    column-gap: 10px;
  }
}

.content img {
  cursor: pointer;
  display: inline-block;
  margin-bottom: 0px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;  
  width: 100%;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

.lightbox {
  background: rgba(0, 0, 0, 0.9);
  color: #fff;
  display: none;
  height: 100%;
  left: 0;
  min-height: 600px;
  position: fixed;
  text-align: center;
  top: 0;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;  
  width: 100%;
}

.lightbox p {
  font-size: 16px;
  margin-right: 30px;
  text-align: right;
}

.lightbox img {
  box-shadow: 0 0 25px #111;
  -webkit-box-shadow:0 0 25px #111;
  -moz-box-shadow:0 0 25px #111;
  max-width: 60%;
}

.wrapper {
  max-height: 80%;
  position: absolute;
  top: 50%;
  transform: translateY(-60%);
  width: 100%;
}

.fa {
  cursor: pointer;
  font-size: 100px !important;
  padding: 20px;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
}

.fa:hover {
  opacity: 0.3;
}

.fa-chevron-left {
  left: 10%;
}

.fa-chevron-right {
  right: 10%;
}