.tooltip01 {
  position: relative;
  display: inline-block;
  border-bottom: 0px dotted black;
}

.tooltip01 .tooltiptext01 {
  visibility: hidden;
  width: 120px;
  background-color: black;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  position: absolute;
  z-index: 1;
  top: -5px;
  left: 110%;
  font-weight:bold;
}

.tooltip01 .tooltiptext01::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 100%;
  margin-top: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: transparent black transparent transparent;
}
.tooltip01:hover .tooltiptext01 {
  visibility: visible;
}