body {
  padding: 5pt;
  font: 10pt "Lucida Grande", Helvetica, Arial, sans-serif;
}

nav {
  display: flex;
  flex-wrap: wrap;
  font: 12pt "Lucida Grande", Helvetica, Arial, sans-serif;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #444444;
}

nav li {
  float: left;
}

nav li a {
  display: block;
  color: white;
  text-align: center;
  padding: 10pt 15pt;
  text-decoration: none;
}

nav li a:hover {
  background-color: #777777;
  color: #ffffff;
}

nav li a.active {
  background-color: #777777;
  color: #ffffff;
}