.tooltip {
  @include transition(opacity $tmg-f3 ease-out 0s);
  position: absolute;
  top: 0;
  left: 0;
  padding: 0 10px;
  border-radius: 3px;
  background: $black-t4;
  line-height: 26px;
  font-size: font-size(x-small);
  color: $white;
  pointer-events: none;
  opacity: 0;

  &:after {
    font-size: font-size(x-large);
    content: '▾';
    display: block;
    position: absolute;
    bottom: -14px;
    left: 50%;
    margin-left: -7px;
    color: $black-t4;
  }
}
