#tooltip {
  text-align: center;
  color: #fff;
  /* next 3 lines from WP Plugin: */
  background: rgba( 0, 0, 0, .7 );
  border-radius: 5px;
  box-shadow: 0 3px 5px rgba( 0, 0, 0, .3 );
  position: absolute;
  z-index: 100;
  padding: 15px;
}

#tooltip::after {  /* triangle decoration */
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid #111;
  content: '';
  position: absolute;
  left: 50%;
  bottom: -10px;
  margin-left: -10px;
}

#tooltip.top::after {
  border-top-color: transparent;
  border-bottom: 10px solid #111;
  top: -20px;
  bottom: auto;
}

#tooltip.left::after {
  left: 10px;
  margin: 0;
}

#tooltip.right::after {
  right: 10px;
  left: auto;
  margin: 0;
}