div {
background-color: red; 
font-size : 28pt;
color: green;
}


div.wazne, a {   background-color: pink; color: blue;} 
a:hover  {  background-color: red; }
div.czarny  {   background-color: black;   } 
div#stopka {
    background-color: #333;
    color: yellow;
    padding: 20px;
    text-align: center;
}