CODE EXAMPLE FOR CSS

light grey border css

body { 
  background: url('http://dovetail-demo.squarespace.com/assets/concrete-texture.png'); 
  padding: 0; 
  margin: 0;
}
.page {
  box-shadow: 0 0 8px 0 rgba(0,0,0,0.2);
  background: #fff;
  width: 400px;
  margin: 0 auto;
  height: 100%;
}