body {
  background-color: black;
  text-align: center;
  color: white;
  font-family: courier;
}

ul {
  list-style-type: none;
  margin-top: 6%;
  padding-left: 22%;
  overflow: hidden;
  background-color: grey;
}

a:link {
  color: white;
}

a:visited {
  color: purple;
}

li {
  padding: 2%;
  float: left;
  margin-left: 7%;
}

a {
  display: block;
  color: white;
  text-align: center;
  text-decoration: none;

  font-size: 140%;
}

li:hover {
  font-weight: bold;
  background-color: lightgrey;
}