padding 1 means code example

Example 1: padding 4 values

padding: top right bottom left;

padding: 1em 3px 30px 5px;  /* top:    1em padding  */
                            /* right:  3px padding  */
                            /* bottom: 30px padding */
                            /* left:   5px padding  */

Example 2: padding

Padding is how much an element is away from itself — 
how much distance an element wants to keep with the elements inside it.