body { font-family: Arial, Helvetica, sans-serif;
             }

        header { background-color: #9933cc;
               color: #ffffff;
               text-align: center;
               padding: 15px;}
               
        nav {color: black;}       

        main {font-size: 20px;
              background-color: yellow;
              margin: 20px; }

        footer { background-color: #0099cc;
                color: #ffffff;
                text-align: center;
                font-size: 12px;
                padding: 15px;}