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

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font: 14px/1 'Open Sans', sans-serif;
  color: #555;
  background: #e5e5e5;
}

.gallery {
  width: 800px;  
  height:auto;
  margin: 0 auto;
  padding: 5px;
  background: #fff;  
  border-color:Green;  
  box-shadow: 1px 1px 1px 1px rgba(0,0,0,.3);  
}

.gallery > div {
  position: relative;
  float: left;
  padding: 5px;
  
}

.gallery > div > img {
  display: block;
  margin-top:2px;
  width: 253px;
  height: auto;
  transition: .1s transform;
  transform: translateZ(0); /* hack */
}

.gallery > div:hover {
  z-index: 1;
}

.gallery > div:hover > img 
{	border:5px;
	border-style: ridge;
	border-color: White;
	transform: scale(2.7,2.7);
	transition: .5s transform;
}

.cf:before, .cf:after {
  display: table;
  content: "";
  line-height: 0;
}

.cf:after {
  clear: both;
}

h1 {
  margin: 40px 0;
  font-size: 30px;
  font-weight: 300;
  text-align: center;
}