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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {margin:0;}
.topnav {
  overflow: hidden;
  background-color: #f1f1f1;
}
.topnav a {
  float: left;
  display: block;
  color: black;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
  border-bottom: 3px solid transparent;
}
.topnav a:hover {
  border-bottom: 3px solid red;
}
.topnav a.active {
  border-bottom: 3px solid red;
}
</style>
</head>
<body>
<div class="topnav">
  <a class="active" href="#home">Home</a>
  <a href="#news">News</a>
  <a href="#contact">Contact</a>
</div>
<div style="padding-left:16px">
  <h2>Border Links</h2>
  <p>Hover over the links.</p>
</div>
</body>
</html>