* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { width: 100%; height: 100%; background: #000; overflow: hidden; }
#unity-canvas { width: 100%; height: 100%; display: block; }
#unity-loading-bar {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
}
#unity-progress-bar-empty {
  width: 100%;
  height: 4px;
  background: #333;
  border-radius: 2px;
}
#unity-progress-bar-full {
  width: 0%;
  height: 4px;
  background: #fff;
  border-radius: 2px;
  transition: width 0.2s;
}