body {
  background: #222;
  color: #fff;
  font-family: sans-serif;
}

a {
  color: #0af;
}

code {
  background: #181818;
  padding: .1rem;
  margin: .1rem;
  font-size: 1rem;
  border-radius: 3px;
}

code.block {
  display: block;
  margin: .5rem;
  padding: 1rem;
  border: 1px solid #444;
  width: max-content;
}

#demo {
  float: right;
  margin-right: 1rem;
  height: 30rem;
  border-radius: 5px;
  box-shadow: 0 0 10px 0 #0008;
}