html, body {
  width: 100%;
  height: 100%;
  padding: 0;
  margin: 0;
  line-height: 0;
}

canvas#sketch {
  margin:20px;
  max-width: calc(75vh);
  max-height: calc(100vh);
  /* border: .3vh solid black; */
}

html {
  background-color: #fff;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}