body{
margin:0 auto;
}
.ueberschrift{
clear:both;
margin:0;
padding:10px ;
/*font-weight:bold;
text-decoration:underline;*/
border-top:1px solid #ddd;
}
.bild{
float:left;
background: #fff;
margin:0;
padding:9px;
border:1px solid #fff;
}
.bild:hover{
background:#ddd;
border:1px solid #eee;
}
#container{
 position: absolute;
 width:90%;
 left: 50%;
 margin:61px 0 0 -45%;
 border:1px solid #ddd;
 z-index: 1;
}
#navigation{
 margin:10px;
}
#navigation a{
color: black;
backgorund: #fff;
}
#navigation a:hover{
color: black;
background: lightgreen;
}
#navigation a.back_red:hover{
color: black;
background: red;
}
#fester_kopf{
 position: fixed;
 background:#fff;
 width:90%;
 left: 50%;
 margin:0 0 0 -45%;
 border:1px solid #ddd;
 z-index: 2;

 }
#fester_kopf p{
 float:left;
 clear:both;
 margin:10px;
 /*padding-left: 10px;*/
 border:1px dashed #fff;
 }