border shadow under navbar code example

Example 1: navbar box shadow

box-shadow: 0 2px 5px 0 rgba(0,0,0,0.16);

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;
}