body {
  background-color: #0d1117;
  color: white;
  text-align: center;
  font-family: 'Poppins', sans-serif;
}

canvas {
  background: #161b22;
  border: 2px solid #30363d;
  box-sizing: border-box;
  display: block;
  margin: 20px auto;
  border-radius: 6px;
  width: min(400px, calc(100vw - 16px));
  height: auto;
  aspect-ratio: 1;
  touch-action: none;
}