.ek-tooltip {
  position: absolute;
  white-space: nowrap;
  padding: 8px 10px;
  background-color: #000;
  color: #fff;
  line-height: 20px;
}
.ek-tooltip.right:after {
    position: absolute;
    left: -16px;
    top: 50%;
    transform: translateY(-50%);
    content: '';
    border-width: 8px 8px;
    border-style: solid;
    border-color: transparent #000 transparent transparent; 
}
.ek-tooltip.left:after {
    position: absolute;
    right: -16px;
    top: 50%;
    transform: translateY(-50%);
    content: '';
    border-width: 8px 8px;
    border-style: solid;
    border-color: transparent transparent transparent  #000; 
}