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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="https://www.w3schools.com/w3css/4/w3.css"> <body> <div class="w3-panel w3-padding-small w3-blue"> The w3-padding-small class adds 4px top and bottom and 8px left and right. </div> <div class="w3-panel w3-padding w3-blue"> The w3-padding class adds 8px top and bottom and 16px left and right. </div> <div class="w3-panel w3-padding-large w3-blue"> The w3-padding-large class adds 12px top and bottom and 24px left and right. </div> </body> </html>
