body{background-color:#000080;}
#navi{
border-width: 2px;
border-style: solid;
border-color:black;
background-color:#ffa500;
width: 180px;
margin-left: 15px;
padding-left: 20px;
float:left; 
}

#header{
border-width: 2px;
border-style: solid;
border-color:black;
background-color:#ffa500;
margin-top: 0px;
margin-right: 15px;
margin-bottom: 40px;
margin-left: 15px;
height: 110px;
}

#inhalt{
border-width: 2px;
border-style: solid;
border-color:black;
background-color:#ffa500;
margin-left:  220px;
margin-right: 15px;
padding:15px; 
}