box shadow in bootstrap w3schools code example
Example 1: adding shadow to a div
/* CSS box shadow look like paper lift up*/
/* provide shadow to all four corners */
/* source - W3Schools.com */
box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
Example 2: change button shaddow css
button{
2.5px 2.5px 2px #888;
}