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<!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <style> body { background-color: yellow; } @media only screen and (max-width: 600px) { body { background-color: lightblue; } } </style> </head> <body> <h1>The @media Rule</h1> <p>Resize the browser window. When the width of this document is 600 pixels or less, the background-color is "lightblue", otherwise it is "yellow".</p> </body> </html>
