#nav {
  list-style: none;
  overflow: hidden;
}
 
#nav li {
  width: 300px;
  text-align: center;
  background-color: #39f;
  float: left;
  height: 50px;
  line-height: 50px;
  margin-right: 2px;
    margin-bottom: 2px;
}
 
#nav li a {
  text-decoration: none;
  color: #fff;
  font-weight: bold;
  padding: 20px;
}