how to add background shadow css code example

Example 1: css box shadow

/* offset-x | offset-y | blur-radius | spread-radius | color */
box-shadow: 2px 2px 2px 1px rgba(0, 0, 0, 0.2);

Example 2: drop shadow css

filter: drop-shadow(30px 10px 4px #4444dd);
drop-shadow(offset-x offset-y blur-radius color)

Example 3: how to add background shadow css

box-shadow: 2px 2px 2px 1px rgba(0, 0, 0, 0.2);