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

.tooltip .tooltiptext {
  visibility: hidden;
  width: 150px;
  background-color: #e3e3e3;
  color: #000000;
  border: 0.5px solid black;
  text-align: center;
  padding: 5px 0;
  border-radius: 6px;
  position: absolute;
  z-index: 1;
}
.tooltip:hover .tooltiptext {
  visibility: visible;
  padding: 7px 7px;
}