.container {
  width: 60%;
  margin: 2em;
  padding: 2em;
  border: 1px solid grey;
}

h1, h2 {
  margin-top: 0em;
  font-family: Helvetica, Arial, sans-serif;
}

a {
  padding: .3em .7em;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 1.3em;
  text-decoration: none;
  color: #fff;
  background: orange;
}

p {
  font-family: Courier;
}

.correct {
  color: green;
}

.incorrect {
  color: red;
}