#game-container {
  position: relative;
  display: inline-block;
}

#scene {
  display: block;
  width: 100%;
  height: auto;
}

.hotspot-button {
  position: absolute;
  background-color: rgba(255, 255, 255, 0.3); /* Semi-transparent */
  border: 2px solid #00f;
  cursor: pointer;
  padding: 0;
  width: 50px;
  height: 50px;
}