html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #2a2c2e;
  font-family: Tahoma, "Segoe UI", Arial, sans-serif;
}

#app {
  position: fixed;
  inset: 0;
}

.scene-layer {
  position: absolute;
  inset: 0;
}

.scene-layer canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.hud-layer,
.screen-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}