By default,an element's background is defined to extend only through the padding space and not to include the border space.

Question

Quizplus · Accepted Answer

This means that the element's background will not cover the space occupied by its border, only the space occupied by its padding. If you want the background to cover the border space as well, you need to set the CSS property `background-clip` to `border-box`.

By Default,an Element's Background Is Defined to Extend Only Through