.container{
    padding: 20px;
    margin: auto;
    width: 50%;
    padding: 10px;
    background-color: black;
}
.container .gallery a img {
  float: left;
  width: 30%;
  height: auto;
  border: 0px solid black;
  -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;
  background-color: black;
}
.container .gallery a:hover img {
  -webkit-transform: scale(1.05);
  -moz-transform: scale(1.05);
  -o-transform: scale(1.05);
  -ms-transform: scale(1.05);
  transform: scale(1.05);
  z-index: 5;
}
.clear {
  clear: both;
  float: none;
  width: 100%;
  background-color: black;
}
body {
  background-color: black;
}
div {
  background-color: black;
}
img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 40%;
}