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

html, body {
  background: #000;
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: fixed;
  touch-action: none;
}

body { display: block; }

#game-container {
  position: relative;
  width: 100%;
  height: 100%;
}

canvas {
  display: block;
  touch-action: none;
}