CSS Interview Questions

CSS (Cascading Style Sheets) is a styling language used to describe the look and formatting of a document written in HTML or XML.

It separates presentation from content, enabling responsive, maintainable, and visually appealing websites.

CSS controls layout, colors, fonts, animations, and responsiveness across devices.

It works closely with HTML to create engaging user experiences and is essential for modern web development.

The CSS box model represents every HTML element as a rectangular box with four layers: content, padding, border, and margin.

Content area holds text, images, or other content.

Padding adds space inside the element, border wraps the padding and content, and margin adds space outside the element.

Understanding the box model is essential for precise layout control and responsive design.

Box-sizing property helps manage how width and height are calculated, with options like content-box and border-box.

CSS selectors are patterns used to select HTML elements for styling.

Common selectors include element (e.g., p), class (.my-class), ID (#my-id), attribute ([type='text']), pseudo-classes (:hover, :active), and pseudo-elements (::before, ::after).

Selectors enable granular control over document appearance and behavior.

Specificity rules determine which styles take precedence when multiple selectors apply to the same element.

Mastering selectors is crucial for effective and maintainable styling.