Padding affects the box size by adding extra space around the content within the box. When padding is applied, the overall dimensions of the box increase because the padding is added to the width and height of the box.
For example, if you have a box with a specified width and height, and you add padding, the new width and height will be the original dimensions plus twice the padding (once for each side). This ensures that the content inside the box has some space around it, making it visually appealing and easier to read.
In the provided code examples, padding is calculated using the mutation_size parameter, which scales the padding based on the font size. This allows for consistent spacing relative to the text size.
