html {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100%;
}

@media screen {
  body {
	max-width: 38rem;
	padding: 1.5rem;
	margin: auto;

    font-family: "Helvetica", "Arial", sans-serif;

    color: #555;

    h1, h2, strong {
      color: #333;
    }

    code, pre {
      background: #eee;
    }
  }
}