CSS Fundamentals

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in HTML. CSS controls the layout of multiple web pages all at once, making it a powerful tool for web developers.

What is CSS?

CSS allows you to apply styles to web pages, including colors, fonts, and spacing. It separates content from design, enabling easier maintenance and updates.

Selectors and Properties

CSS uses selectors to target HTML elements. For example, the p selector targets all paragraph elements. Properties define how those elements should be styled, such as color and font-size.

Box Model

Understanding the CSS box model is crucial for layout design. Every element is represented as a rectangular box, which includes margins, borders, padding, and the actual content area. Mastering the box model helps in creating responsive designs.