body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.topnav {
  background-color: #333333;
  overflow: hidden;
}

.topnav a {
  float: left;
  color: #F2F2F2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #DDDDDD;
  color: black;
}

.topnav a.active {
  background-color: #1B4094;
  color: white;
}