.play-btn-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.6);
  border: none;
  border-radius: 50%;
  padding: 15px;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  transition: background 0.3s;
  z-index: 10;
}

.play-btn-overlay:hover {
  background: rgba(255, 255, 255, 0.2);
}