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              <h1>Tooltip using CSS3</h1>

<div class="demo">
  <p><a href="#" data-tooltip="I’m the tooltip text.">I’m a link with a tooltip.</a></p>

  <p><button data-tooltip="I’m the tooltip text.">I’m a button with a tooltip</button></p>
 * Not needed for tooltips to work

/* `border-box`... ALL THE THINGS! */
html {
  box-sizing: border-box;
  font-family: Arial;

*:after {
  box-sizing: inherit;

body {
  margin: 64px auto;
  text-align: center;
  font-size: 100%;
  max-width: 640px;
  width: 94%;

a:hover {
  text-decoration: none;

.demo p {
  margin: 4em 0;
  text-align: center;

 * Tooltip Styles

/* Add this attribute to the element that needs a tooltip */
[data-tooltip] {
  position: relative;
  z-index: 2;
  cursor: pointer;

/* Hide the tooltip content by default */
[data-tooltip]:after {
  visibility: hidden;
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
  filter: progid: DXImageTransform.Microsoft.Alpha(Opacity=0);
  opacity: 0;
  pointer-events: none;

/* Position tooltip above the element */
[data-tooltip]:before {
  position: absolute;
  bottom: 150%;
  left: 50%;
  margin-bottom: 5px;
  margin-left: -80px;
  padding: 7px;
  width: 160px;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
  background-color: #000;
  background-color: hsla(0, 0%, 20%, 0.9);
  color: #fff;
  content: attr(data-tooltip);
  text-align: center;
  font-size: 14px;
  line-height: 1.2;

/* Triangle hack to make tooltip look like a speech bubble */
[data-tooltip]:after {
  position: absolute;
  bottom: 150%;
  left: 50%;
  margin-left: -5px;
  width: 0;
  border-top: 5px solid #000;
  border-top: 5px solid hsla(0, 0%, 20%, 0.9);
  border-right: 5px solid transparent;
  border-left: 5px solid transparent;
  content: " ";
  font-size: 0;
  line-height: 0;

/* Show tooltip content on hover */
[data-tooltip]:hover:after {
  visibility: visible;
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
  filter: progid: DXImageTransform.Microsoft.Alpha(Opacity=100);
  opacity: 1;
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