* {
  margin:0;
  padding:0;
}

#barrasuperior{
  position:fixed;
  left:0px;
  width:100%;
  height:50px;
  background-color:black;
  color:white;
}

#barralateral{
  position:fixed;
  left:0px;
  top:50px;
  width:200px;
  height:100%;
  background-color:#eee;
}

#contenido{
  padding-top:70px;
  padding-left:220px;
}