body {
  background-color: #eee;
  font-family: Arial, sans-serif;
}

#container {
  width: 500px;
  margin: 20px auto;
  text-align: center;
  background-color: #fff;
  padding: 15px;
  box-shadow: 4px 4px 10px #999;
}

#controls {
  margin-bottom: 10px;
}

canvas {
  background-color: white;
  border: 1px solid #333;
}