body {
  margin: 0;
  font-family: sans-serif;
  background: #111;
  color: white;
}

#canvas-container {
  width: 100%;
  height: 600px;
}

.controls {
  padding: 10px;
  background: #222;
  display: flex;
  gap: 10px;
  justify-content: center;
}