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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="4/w3.css"> <body> <div class="w3-container w3-center"> <h2>Button Bars</h2> <p>Buttons bars can be centered using the <strong>w3-center</strong> class:</p> <div class="w3-bar"> <button class="w3-button w3-black">Button</button> <button class="w3-button w3-teal">Button</button> <button class="w3-button w3-red">Button</button> </div> </div> </body> </html>