body{
 margin: 0;
}

header{
  background-color: lightgrey;
  padding: 5px;
  text-align: center;
  overflow: auto;
}
/*.headerpic{
  float: left;
  width: 128px;
}*/

.topnav {
  overflow: hidden;
}
.topnav ul{
  list-style-type: none;
  margin: 0;
  padding: 0;
}
.topnav li{
  display: inline;
}
.topnav a{
  float: left;
  display: block;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  color: black;
}
.topnav a.langswitch{
  float: right;
  display: block;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  color: black;
}
.topnav a.active{
  background-color:#555;
  color: white;
}
.topnav a:hover{
  background-color: lightslategray;
  color: blue;
  /*text-transform: uppercase;*/
}

.column {
  float: left;
}
.nav{
  width:25%;
}
.nav iframe{
  height: 600px
}
.main{
  width:75%;
  max-width:1000px
}
.row:after{
  content:"";
  display: table;
  clear: both;
}

iframe{
  border: none;
}

footer{
  background: lightgrey;
  padding: 10px;
  text-align: center;
  bottom: 0;
  height: 50px;
}

footer li{
  display: inline;
}
footer ul{
  list-style-type: none;
  margin: 0;
  padding: 0;
}
footer iframe{
  width: 800px;
}