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<!DOCTYPE html>
<html>
<style>
.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted black;
}
.tooltip .tooltiptext {
  visibility: hidden;
  width: 120px;
  background-color: black;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  /* Position the tooltip */
  position: absolute;
  z-index: 1;
}
.tooltip:hover .tooltiptext {
  visibility: visible;
}
</style>
<body style="text-align:center;">
<h2>Basic Tooltip</h2>
<p>Move the mouse over the text below:</p>
<div class="tooltip">Hover over me
  <span class="tooltiptext">Tooltip text</span>
</div>
<p>Note that the position of the tooltip text isn't very good. Go back to the tutorial and continue reading on how to position the tooltip in a desirable way.</p>
</body>
</html>