body {
  background-color: #9dff14;
  font-family: 'Courier New', monospace;
  color: #222;
  margin: 0;
  padding: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

main {
  text-align: center;
  padding: 40px;
  max-width: 600px;
}

h1 {
  font-size: 3em;
  margin: 0;
  text-transform: lowercase;
}

.subtitle {
  font-size: 1.2em;
  margin: 0.5em 0 2em 0;
  color: #777;
}

nav a {
  margin: 0 10px;
  text-decoration: none;
  color: #444;
  font-size: 1em;
  text-transform: lowercase;
}

nav a:hover {
  color: #000;
}

ul {
  list-style: none;
  padding: 0;
}