shadow backgroung css code example

Example 1: inner box shadow

div {
     box-shadow: inset 0 0 10px #000000;
}

Example 2: box shadow css

#Box-shadow-example {
Box-shadow:0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
}
<!-- offset-x, offset-y, (blur-radius and/or spread-radius=optional) and color-->