.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted #444;
  margin-left: 22px;
}

.tooltip .tooltiptext {
  position: absolute;
  z-index: 1;
  bottom: 150%;
  left: 50%;
  width: 100px;
  padding: 5px 0;
  margin-left: -60px;
  background-color: #444;
  border-radius: 6px;
  color: #f0f0f0;
  opacity: 0.8;
  text-align: center;
}

.tooltip .tooltiptext::after {
  position: absolute;
  top: 100%;
  left: 50%;
  border-width: 5px;
  border-style: solid;
  border-color: #444 transparent transparent transparent;
  margin-left: -5px;
  content: '';
}