:root {
  color: #333;
  accent-color: #333;
  background: #ddd;
  font-family: sans-serif;
}

canvas {
  aspect-ratio: 800 / 600;
  width: 100%;
  box-sizing: border-box;
  display: block;
}

.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 14rem), 1fr));
}

/* Make range inputs wide, to allow finer control. */
input[type=range] {
  display: block;
  width: 100%;
}