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<!DOCTYPE html> <html> <title>W3.CSS</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="/lib/w3.css"> <body> <nav class="w3-sidenav w3-light-grey w3-border" style="width:25%"> <a href="#">Link 1</a> <a href="#">Link 2</a> <a href="#">Link 3</a> <a href="#">Link 4</a> <a href="#">Link 5</a> </nav> <div style="margin-left:25%"> <header class="w3-container w3-dark-grey"> <h1>My Header</h1> </header> <div class="w3-container"> <p>Use the w3-border class to add borders around the side navigation.</p> </div> </div> </body> </html>