Q.Explain the CSS box model with the help of a diagram. Name its four layers from inside to outside.

The box model explains how the browser sizes and spaces every element, and is the basis of all CSS layout. …

In CSS, the browser treats every element as a rectangular box. The box model describes the layers that make up that box, which together determine its size and the space around it.

The CSS box model wraps every element in four nested layers, from innermost to outermost:

The four layers, from inside to outside, are:

1. Content — the actual text or image, sized by width and height.
2. Padding — clear space inside the box, between the content and the border; it takes the background colour.
3. Border — a line drawn around the padding and content. …

Assuming width sets the whole box's width. By default width sizes only the content; padding and border add to …