copy-text {
        cursor: pointer;
        position: relative;
}

span .tooltip  {
  visibility: hidden;
  width: 140px;
  background-color: #fff;
  color: #000;
  text-align: center;
  border-radius: 6px;
  padding: 5px;
  position: absolute;
  z-index: 1;
  bottom: 150%;
  left: 50%;
  margin-left: -75px;
  opacity: 0;
  transition: opacity 0.3s;
}

span:hover .tooltip  {
  visibility: visible;
  opacity: 1;
}