html {
    font-size: large;
}
body {
  margin: 0;
  font-size:1.5rem;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
  overflow:hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 2rem;
}

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

.topnav a.active {
  background-color: #fff200;
  color: black;
}

h2 {
    color: white;
    background-color: black;
    font-weight: bold;
    font-size:larger ;
    text-align: center;
}

.mono {
    font-family:'Courier New', Courier, monospace
}