html, body {
  background: gainsboro;
  color: darkblue;
  font-family: Futura, 'Century Gothic', Helvetica, Arial, sans-serif;
  font-size: 16px;
}

a {
  color: midnightblue;
}

a:visited,
a:active,
a:hover {
  color: rebeccapurple;
}

.experiments {
  margin: 0 auto;
  padding: 0 auto;
}