* {
  margin:0;
  padding:0;
}

#barrasuperior{
  position:fixed;
  left:0px;
  width:200%;
  height:100px;
  background-color:black;
  color:white;
}

#barralateral{
  position:fixed;
  left:0px;
  top:100px;
  width:400px;
  height:100%;
  background-color:#eee;
}

#contenido{
  padding-top:140px;
  padding-left:440px;
}