._tooltip:not([_notooltip]) {
  position: relative;
}

._tooltip:not([_notooltip]):hover ._tooltip-text {
  opacity: 1;
  visibility: visible;
  transition: 0.3s ease-in;
}

._tooltip-text {
  display: inline-block;
  position: absolute;
  bottom: -2rem;
  left: 50%;
  z-index: 2;
  padding: 0.25rem;
  color: #fff;
  background: #333;
  opacity: 0;
  border-radius: 0.25rem;
  box-shadow: 0 0.125rem 0.125rem rgba(0, 0, 0, 0.3);
  font-size: 0.75rem;
  white-space: nowrap;
  line-height: 1.3;
  transform: translateX(-50%);
  visibility: hidden;
}

._tooltip-text::before {
  content: "";
  position: absolute;
  top: -1rem;
  left: 50%;
  z-index: 2;
  margin-left: -0.5rem;
  border: 0.5rem solid transparent;
  border-bottom: 0.5rem solid #333;
}