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<html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css"><body><div class="w3-panel"> <h2>Buttons as Blocks (w3-button)</h2> <button class="w3-button w3-block w3-black">Button</button> <p>The size of the block can be defined using <strong>style="width:"</strong>.</p></div><div class="w3-panel" style="width:30%"> <button class="w3-button w3-block w3-black">Button</button></div><div class="w3-panel" style="width:50%"> <button class="w3-button w3-block w3-teal">Button</button></div><div class="w3-panel" style="width:80%"> <button class="w3-button w3-block w3-red w3-right-align">Button</button></div><div class="w3-panel"> <h2>Buttons as Blocks (w3-button)</h2> <button class="w3-btn w3-block">Button</button></div><div class="w3-panel" style="width:30%"> <button class="w3-btn w3-block">Button</button></div><div class="w3-panel" style="width:50%"> <button class="w3-btn w3-block w3-teal">Button</button></div><div class="w3-panel" style="width:80%"> <button class="w3-btn w3-block w3-red w3-right-align">Button</button></div></body></html>