Distance between lines in categories

Please, tell me the easy way to change distance betwee lines in categories. My categories are composed of two lines and in the general catalog, they visually blend.

Now it looks like

category
name 1
category
name 2
category
name 3

I want something like that:

category
name 1

category
name 2

category
name 3

in styles.css file

find the

.block 
{
  padding-bottom: 5px;
  padding-left: 0;
  color: #FFFFFF;
}

change the value of padding-bottom

or you can add margin-bottom: XXXXpx;

try it yourself.