[data-title]{
  position: relative;
}
[data-title]:after{
  content: attr(data-title);
  position: absolute;
  left: 50%;
  bottom: 100%;
  transform: translate(-50%,0);
  color: #fff;
  text-shadow: 0 -1px 0px black;
  box-shadow: 4px 4px 8px rgba(0, 0, 0, 0.3);
  background: #383838;
  border-radius: 2px;
  padding: 3px 10px;
  font-size: 12px;
  white-space: nowrap;
  transition:all .3s;
  opacity: 0;
  visibility: hidden;
}
[data-title]:hover:after{
  transition-delay: 100ms;
  visibility: visible;
  transform: translate(-50%,-6px);
  opacity: 1;
}