body {
  /* Wrap around at a more comfortable reading width. */
  max-width: 72ch;

  /* Center page. */
  margin: auto;

  padding: 2ch;

  /* For reading text on a screen a sans-serif font is recommended. */
  font-family: sans-serif;
}

h1 {
  color: #555753; /* Tango aluminium5 */
  background-color: #eeeeec; /* Tango aluminium1 */
  text-align: center;
  border: medium solid #555753; /* Tango aluminium5 */
  padding: 0.2em;
}

h2 {
  color: #4e9a06; /* Tango chameleon3 */
}

h3 {
  color: #555753; /* Tango aluminium5 */
}

p {
  line-height: 1.4;
}

ul {
  line-height: 1.8;
}