#tooltip {
    background: #333;
    color: white;
    font-weight: bold;
    padding: 4px 8px;
    font-size: 13px;
    border-radius: 4px;
}

#arrow,
#arrow::before {
  position: absolute;
  width: 8px;
  height: 8px;
  background: inherit;
}

#arrow {
  visibility: hidden;
}

#arrow::before {
  visibility: visible;
  content: '';
  transform: rotate(45deg);
}

#tooltip[data-popper-placement^='top'] > #arrow {
  bottom: -4px;
}

#tooltip[data-popper-placement^='bottom'] > #arrow {
  top: -4px;
}

#tooltip[data-popper-placement^='left'] > #arrow {
  right: -4px;
}

#tooltip[data-popper-placement^='right'] > #arrow {
  left: -4px;
}