body{background-color:LightSlateGray;}h1{text-align: center;font-size: 40px;}h2{text-align: center;font-size: 30px; margin:20px; padding:10px;}.flotte {float:left;}#navigation li a {  display: block ;  background: #c00 ;  color: black ;  font: 1em ;  line-height: 1em ;  text-align: center ;  text-decoration: underline ;  padding: 4px 0 ;   width: 200px;  list-style: none;  margin: 4px;  padding: 0;}#navigation li a:hover, #navigation li a:focus, #navigation li a:active {  background: #900 ;  text-decoration: underline ;}