@import url(https://fonts.googleapis.com/css?family=Roboto);

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: 'Roboto', sans-serif;
  background: gainsboro;
}

canvas {
  padding: 00px;
  text-align: center;
}