body {
  background: #111;
  color: #eee;
  font-family: monospace;
  text-align: center;
  padding: 20px;
}
canvas {
  border: 2px solid #666;
  image-rendering: pixelated;
  margin-top: 10px;
}
input[type="file"] {
  margin: 10px;
  color: white;
}