body {
  margin: 0;
  padding: 0;
  background: #1e1e1e;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
  font-family: Arial, sans-serif;
}

canvas {
  border: 4px solid #fff;
  background-color: #87ceeb;
  image-rendering: pixelated;
}

@media (hover: hover) and (pointer: fine) { #fsBtn { display: none !important; } }