body {
  font-family: sans-serif;
  padding: 16px;
  background: #f7f7f7;
}

h2 {
  margin-bottom: 10px;
}

.controls {
  margin-bottom: 10px;
}

button {
  margin-right: 8px;
  padding: 8px 12px;
  border: none;
  background: #06c755;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  opacity: 0.8;
}

canvas {
  background: white;
  border-radius: 12px;
  padding: 10px;
}