:root {
  --tooltip-transition-speed: 0.15s;
}

[data-tooltip] {
  cursor: pointer;
} 
#cursor-tooltip {
  position: fixed;
  z-index: 9999;
  top: 0; left: 0;
  max-width: 400px;
  pointer-events: none;
  background: #FFF;
  color: #000 !important;
  box-shadow: rgba(0, 0, 0, 0.02) 0px 1px 3px 0px, rgba(27, 31, 35, 0.15) 0px 0px 0px 1px;
  padding: 0.1em 0.2em;
  font-size: 0.8em;
  font-weight: 300;
  
  opacity: 0;
  visibility: hidden;
  transition: 
    opacity    var(--tooltip-transition-speed) ease, 
    visibility var(--tooltip-transition-speed) ease,
    transform  var(--tooltip-transition-speed) ease-out;
}
#cursor-tooltip.is-visible {
  opacity: 1;
  visibility: visible;
}