body {
  margin: 0 auto;
  max-width: 1200px;
  padding: 0 20px;
}

.demo {
  border: 2px dashed rgba(0, 0, 0, 0.05);
}

code {
  display: inline-block;
  padding: 5px 10px;
  background: #1d1e22;
  border-radius: 4px;
  color: #9a8297;
}

h2 {
  border-bottom: 1px solid #f4f4f4;
  padding-bottom: 10px;
}