/* css styles */
.hovertext {
  position: relative;
  border-bottom: 1px dotted black;
}

.hovertext:before {
  content: attr(data-hover);
  visibility: hidden;
  opacity: 0;
  width: relative;
  background-color: white;
  color: black;
  text-align: left;
  border-radius: 5px;
  padding: 5px 10px;
  transition: opacity 1s ease-in-out;
  white-space: pre-wrap;
  
  position: absolute;
  z-index: 1;
  left: -150%;
  top: -1500%;
}

.hovertext:hover:before {
  opacity: 1;
  visibility: visible;
}