body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: #000;
}

canvas {
  display: block;
}

.serve-btn {
  position: absolute;
  top: 20px;
  left: 20px;
  padding: 10px 20px;
  font-size: 16px;
  z-index: 1;
  cursor: pointer;
}

.marbles-btn {
  position: absolute;
  top: 70px;
  left: 20px; /* Positioned to the right of the serve button */
  padding: 10px 20px;
  font-size: 16px;
  z-index: 1;
  cursor: pointer;
}

.ar-btn {
  position: absolute;
  top: 120px;
  left: 20px;
  padding: 10px 20px;
  font-size: 16px;
  z-index: 1;
  cursor: pointer;
  background: #4CAF50;
  color: white;
  border: none;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

.ar-btn:hover {
  background: #45a049;
}

.ar-btn.active {
  background: #2196F3;
}

#ui-controls {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  text-align: center;
}

#start-ar {
  padding: 12px 24px;
  background: #4CAF50;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s ease;
}

#start-ar:hover {
  background: #45a049;
}

.a-canvas {
  width: 100% !important;
  height: 100% !important;
}