.popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0px 1px 5px black;
  z-index: 3;
}

#exmaple-id {
  display: none;
}