body {
    margin:15px auto;
    width: 1102px;
}
div {
    
}
div.box {
    border:1px solid grey;
    margin:3px;
    padding:2px;
}

div#main_container {
    padding: 0;
    border:2px solid firebrick;
}
div#header {
    border:1px solid grey;
}
div#container {
    margin: -3px 0;
    overflow: auto;
}
div#um {
    width:265px;
    float:left;
}
div#pfad {
    margin-bottom: 0 ;
    margin-left:0;
    width:806px;
    float:right;
}
div#content {
    margin-left:0;
    width:806px;
    float:right;
    min-height:600px;
}
div#footer {
    float:all;
    text-align: center;
    color:grey;
    
}