What to know about the box model in CSS
Every element is a box with content, padding, border, and margin. Understanding this is essential for layout control. This chapter explains the concept, demonstrates a practical example, and gives you a guided exercise.
How to use the box model in CSS
Write a rule with a clear selector and declarations, then inspect the cascade in browser developer tools. Prefer reusable classes, responsive units, and visible focus styles.
Example: the box model in CSS
Use this example as a starting point. Identify the part that controls the result, then adapt it to your own page or project.
.button { padding: 12px 20px; border: 1px solid #d1d5db; margin: 8px; }Common questions about the box model
When should I use the box model?
Use this technique when it expresses the structure, styling, or behavior your page needs. Keep the implementation focused and test it with the surrounding content.
What should I practice next?
Style a responsive card with readable type, consistent spacing, a clear focus state, and a layout that adapts to a narrow screen.
Practice the box model
Style a responsive card with readable type, consistent spacing, a clear focus state, and a layout that adapts to a narrow screen. Compare your result with the example and check it at both desktop and mobile widths where relevant.
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