body {
  margin: 0;
  overflow: hidden;
  background-color: #000;
}

canvas {
  display: block;
}

.buttons {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 20px;
  z-index: 100;
}

.serve-btn {
  padding: 10px 20px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s;
}

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

.webgl {
  position: fixed;
  top: 0;
  left: 0;
  outline: none;
}