* {
  margin: 0;
  padding: 0;
}

html,
body {
  width: 100%;
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
}

canvas {
  width: 50%;
  height: 50%;
  box-shadow: 0 0 3px 2px rgba(0, 0, 0, 0.1);
}