body {
  max-width: 700px;
  margin: 40px auto;
  font-family: monospace;
  color: #000;
  background: #fff;
  line-height: 1.6;
}

h1 {
  border-bottom: 2px solid #000;
  padding-bottom: 5px;
}

a {
  color: #00f;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 40px;
  font-size: 0.9em;
  color: #333;
}