:root {
  color: #f2f2f2;
  background: #111;
  font-family: sans-serif;
}

body {
  margin: 1rem;
}

header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}

h1, p {
  margin: 0;
}

button {
  padding: 0.5rem 0.8rem;
}

canvas {
  width: min(100%, 512px);
  height: auto;
  background: #000;
  image-rendering: pixelated;
  touch-action: none;
  cursor: crosshair;
  border: 1px solid #333;
}