Stacked Paper
.paper {
background: #fff;
box-shadow:
/* The top layer shadow */
0 1px 1px rgba(0,0,0,0.15),
/* The second layer */
0 10px 0 -5px #eee,
/* The second layer shadow */
0 10px 1px -4px rgba(0,0,0,0.15),
/* The third layer */
0 20px 0 -10px #eee,
/* The third layer shadow */
0 20px 1px -9px rgba(0,0,0,0.15);
/* Padding for demo purposes */
padding: 30px;
}