## Task
Let's explore the practical differences between the `content-box` and `border-box` values for the `box-sizing` property. Your task is as follows:
- Apply the `content-box` value to the `box-sizing` property for the element with the `content-box` id.
- Apply the `border-box` value to the `box-sizing` property for the element with the `border-box` id.

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- `box-sizing: content-box`: Width and height exclude padding and border.
- `box-sizing: border-box`: Width and height include padding and border.


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## Explanation
- The **first box** uses `content-box` (the default). Width and height apply only to the content, so padding and border **increase** its final size beyond 200×200px;
- The **second box** uses `border-box`. Width and height include content, padding, and border, so the overall size stays **exactly 200×200px**.

This makes the first box visibly larger, while the second remains consistent regardless of added padding or border.

A focused introduction to CSS for beginners, tailored for React and Next.js developers. This course covers selectors, the box model, text styling, and essential layout techniques like Flexbox. Gain hands-on experience with the core CSS concepts that are most relevant for building modern, component-based web applications.

Challenge: Apply Box Sizing to Elements

Task

Explanation

Challenge: Apply Box Sizing to Elements

Task

Explanation