body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
}

.topnav {
  overflow: hidden;
  background-color: DarkGoldenRod;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 9px 12px;
  text-decoration: underline;
  font-size: 14px;
  font-weight: bold;
}

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

.topnav a.active {
  background-color: CornflowerBlue;
  color: white;
}