html, body {
  margin: 0;
  padding: 0;
}
canvas {
  display: block;
}

h2 {
  display: block;
  font-size: 1.2em;
  margin-top: 0.67em;
  margin-bottom: 0.67em;
  margin-left: 0;
  margin-right: 0;
  font-weight: bold;
}