body {
  font-family: system-ui, sans-serif;
  max-width: 700px;
  margin: 2em auto;
  padding: 0 1em;
  background: #fff;
  color: #222;
}

nav {
  margin-bottom: 1em;
  font-size: 1.1em;
}
nav a {
  text-decoration: none;
  color: #1064b4;
}
nav a:hover {
  text-decoration: underline;
}
hr {
  border: 0;
  border-top: 1px solid #eee;
}
footer {
  margin-top: 2em;
  text-align: center;
  font-size: .9em;
  color: #888;
}