* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  background: #1a1a1f;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Courier New", monospace;
}

main {
  width: min(96vw, 940px);
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  background: #f7f7f7;
  border-radius: 8px;
  image-rendering: pixelated;
  touch-action: none;
}

.help {
  margin-top: 10px;
  text-align: center;
  color: #777;
  font-size: 13px;
}