.slick-custom-tooltip {
  position: absolute;
  background-color: #ffffff;
  border: 2px solid #acacac;
  border-radius: 4px;
  color: inherit;
  font-size: 7.5pt;
  padding: 7px;
  height: auto;
  width: auto;
  z-index: 9999;
  overflow: inherit;
  text-overflow: ellipsis;
  white-space: normal;
}

/** 
 * tooltip arrow styling, arrow styled following this article
 * https://blog.logrocket.com/creating-beautiful-tooltips-with-only-css/
 */
.slick-custom-tooltip.tooltip-arrow::after {
  content: "";
  left: 0px;
  position: absolute;
  border: transparent;
  border-style: solid;
  border-width: 8px; /* arrow size */
}
.slick-custom-tooltip.tooltip-arrow.arrow-up::after {
  top: -16px; /* arrow size, negative(8px * 2) */
  border-bottom-color: #BFBDBD;
}
.slick-custom-tooltip.tooltip-arrow.arrow-down::after {
  top: 100%;
  border-top-color: #BFBDBD;
}
.slick-custom-tooltip.tooltip-arrow.arrow-left-align::after {
  margin-left: 9px;
}
.slick-custom-tooltip.tooltip-arrow.arrow-right-align::after {
  margin-left: calc(100% - 16px - 9px); /* arrow size * 2 => 16px, extra margin of 9px */
}