* {
  margin:0;
  padding:0;
}
body {
  min-width: 680px;
  background: #999; 
  padding:10px;
}

#cabecera {
  background: #e0e;
}

#titulo {
  height:70px;
}

ul#barrahorizontal {
  list-style-type: none;
  background: #036;
  float: left;
  width: 100%;
}

ul#barrahorizontal li {
  display: inline;
}

ul#barrahorizontal a {
  display: block;
  float: left;
  padding: 4px 18px;
  text-decoration: none;
  color: #fff;
  background: #036;
  border-right: 1px solid #fff;
}

ul#barrahorizontal a:hover {
  color: #000;
  background: #69C;
}