html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #000;
  /* solid black ALWAYS */
  overflow: hidden;
}

#unity-container {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  /* NO WHITE ANYWHERE EVER */
}

#unity-canvas {
  display: block;
  background: #000;

  /* Allow natural size */
  width: auto !important;
  height: auto !important;

  /* Prevent canvas escaping container */
  max-width: 100vw !important;
  max-height: 100vh !important;

  object-fit: contain;
}