html {
  margin: 0;
  padding: 0;
  font-size: 16px;
  height: 100%;
  font-family: "Roboto Mono", "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
}

body {
  text-align: center;
  margin: 0 auto;
  padding: 1em;
  max-height: 800px;
  max-width: 600px;
}

img {
  width: 100%;
}