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<!DOCTYPE html> <html lang="fr"> <head> <meta charset="UTF-8"> <title>Les grilles CSS</title> <style> body { text-align: center; } #conteneur { display: grid; grid-template-columns: repeat(3, 1fr); max-width: 480px; margin: 0 auto; } #conteneur div { background: yellow; padding: 20px; } #conteneur div:nth-child(even) { background: lime; } </style> </head> <body> <div id="conteneur"> <div>1</div> <div>2</div> <div>3</div> <div>4</div> <div>5</div> <div>6</div> <div>7</div> <div>8</div> <div>9</div> </div> </body> </html>