.popup {
  display: flex;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.popup-content {
  background: white;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
}

.popup button {
  margin: 10px;
  padding: 8px 16px;
  border: none;
  cursor: pointer;
}

#play-audio {
  background-color: green;
  color: white;
}

#close-popup {
  background-color: red;
  color: white;
}