.tooltip {
  position: relative;
  display: inline-block;
/*  border-bottom: 1px dotted black;*/
}

.tooltip .tooltiptext {
  visibility: hidden;
  height: 25px;
  width: auto;	
  background-color: #25325b;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  border: solid 1px white;
  padding: 5px;
  margin: 5px;
  font-size: 0.75em;
  /* Position the tooltip */
  top: -35px;
  left: 50px;
  position: absolute;
  z-index: 10;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
}