add shadow to bottom code example
Example 1: box shadow bottom only
box-shadow: 0 4px 2px -2px gray;
Example 2: box bottom shadow css
.box-bottom-shadow {
-webkit-box-shadow: 0 8px 6px -6px black;
-moz-box-shadow: 0 8px 6px -6px black;
box-shadow: 0 8px 6px -6px black;
}