body {
  background-color: #0d0d0d;
  color: #e0e0e0;
  font-family: monospace, sans-serif;
  margin: 0;
  padding: 2em;
  line-height: 1.6;
}
main {
  max-width: 700px;
  margin: auto;
}
a {
  color: #9cf;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
h1, h2 {
  color: #fff;
}
footer {
  margin-top: 2em;
  font-size: 0.9em;
  color: #666;
}