.container {
  margin-top: 20px;
  margin-bottom: 40px;
  max-width: 700px !important;
}

canvas {
  border: 1px solid black;
  background-color: #fff;
  display: block;
}

.canvas-container {
  margin-top: 20px;
  padding: 20px;
  border-radius: 10px;
  background-color: #aaa;
  display: inline-block;
}