html {
  background-color: #ddd;
}

body {
  background-color: #fff;
  font-family: sans;
  font-size: 1.1em;
  padding: 1em;
  margin: 0 auto;
  max-width: 60em;
  border: 1px #666 solid;
  border-top: none;
}

h1 {
  font-size: 1.4em;
  text-align: center;
  font-weight: bold;
  margin: 1em auto 1.9em auto;
}

p {
  line-height: 1.5em;
  margin: 0.7em 0;
}

a, a:visited, a:hover {
  color: #33f;
  text-decoration: underline;
}

tt {
  border: 1px #555 dashed;
  border-radius: 0.5em;
  padding: 0.5em;
  font-size: 1.1em;
}