html, body {
  margin: 0;
  min-height: 100vh;
  background: #e9edf2;
}

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

canvas {
  display: block;
  width: 100vw;
  max-width: 700px;
  height: auto;
}