body {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 20px;

  font-family: "IBM Plex Mono", monospace;
  line-height: 1.6;

  color: #f2f2f2;
  background: #121212;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  margin-bottom: 5px;
}

h2 {
  margin-top: 40px;
  border-bottom: 1px solid #ddd;
  padding-bottom: 5px;
}

a {
  color: #349627;
}

a:hover {
  text-decoration: none;
}

nav {
  margin-bottom: 50px;
}

nav a {
  margin-right: 15px;
}

section {
  margin-bottom: 40px;
}

footer {
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px solid #ddd;
  font-size: 14px;
  color: #fff;
}