body {
  background: #000;
  color: #f0f;
  font: 18px/1.5 sans-serif;
}

header {
  text-align: center;
  font-weight: bold;
}

h1 {
  font-size: 3.375em;
  margin: 0;
}

h2 {
  font-size: 1.5em;
  margin: 0;
}

nav > a {
  display: block;
}

main, nav, footer {
  margin: auto;
  max-width: 60ch;
}

hr {
  height: 2px;
  border: none;
  background: #f0f;
}

a {
  color: #f0f;
  text-decoration: none;
}

a:hover {
  color: #808;
}