body {

}


#cont {
    position:absolute;
    top:50px;
    left:100px;
    width:50%;
    
    border-color:#ccc;
    border-width:1px;
    border-style:solid;   
    
    padding:10px;
}
  
div.nav  {
    margin-top:0.5em;
    margin-bottom:0.5em;
}