#nav {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #333;
}
 
#nav li {
  float: left;
}
 
#nav li a {
  display: inline-block;
  color: white;
  text-align: center;
  padding: 0.8em 1em;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.2em
}

#nav li a:hover {
  background-color: #111;
}

#nav li.current a {
  background-color: blue;
}