.custom-tooltip {
  position: fixed;
  background: #616161;
  color: white;
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 12px;
  z-index: 1000;
  pointer-events: none;
  box-shadow: 0 2px 4px -1px rgba(0, 0, 0, 0.2), 0 4px 5px 0 rgba(0, 0, 0, 0.14),
  0 1px 10px 0 rgba(0, 0, 0, 0.12);

  opacity: 0;
  transform: scale(0.8);
  transform-origin: center;
  transition: opacity 150ms cubic-bezier(0.4, 0, 0.2, 1),
  transform 150ms cubic-bezier(0.4, 0, 0.2, 1);

  &.visible {
    opacity: 1;
    transform: scale(1);
  }

  &::after {
    content: "";
    position: absolute;
    width: 0;
    height: 0;
    border: 6px solid transparent;
  }
}