/*  Tooltip  */
.tooltip {
  display: block;
  padding: 7px 10px;
  background: #454545;
  color: #fff;
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 12px;
  position: absolute;
  white-space: nowrap;
  z-index: 999;
  opacity: 0;
  text-align: center;
  letter-spacing: 0.5px;
}

.tooltip::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 3px 3px 0 3px;
  border-color: #454545 transparent transparent transparent;
  display: block;
  text-align: center;
  position: absolute;
  bottom: -3px;
  left: 50%;
  margin-left: -3px;
}