box shadow in css for button code example
Example 1: inner box shadow
div {
box-shadow: inset 0 0 10px #000000;
}
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;
}