body {
  margin: 0;
  padding: 0;
  background-color: #111;
  color: #eee;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}

h1, h2, h3 {
  color: #fff;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

h2 {
  margin-top: 2rem;
  font-size: 1.5rem;
}

h3 {
  margin-top: 1.2rem;
  font-size: 1.2rem;
}

ul, ol {
  margin-left: 1.2rem;
}

hr {
  border: none;
  border-top: 1px solid #444;
  margin: 2rem 0;
}

p.footer {
  margin-top: 3rem;
  font-style: italic;
  color: #aaa;
  text-align: center;
}