html, body {
  height: 100%;
}

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

svg {
  width: 100%;
}

.container {
  width: 100%;
  height: 100%;
}
.container canvas {
  display: block;
  width: 100%;
  height: 100%;
}