Introduction to CSS

CSS, which stands for Cascading Style Sheets, is a language used for describing the presentation of HTML (HyperText Markup Language) and XML (Extensible Markup Language) documents, including colors, fonts, layout, and other visual elements. It allows web developers and designers to separate the content and structure of a web page from its presentation and styling, making it easier to manage and update.

CSS works by providing rules that specify how specific HTML elements should be displayed. These rules can be applied directly to individual HTML elements or to groups of elements using selectors. CSS also allows for the creation of reusable styles, which can be defined once and applied to multiple elements across a website.

Some of the key features of CSS include:

1. Separation of content and presentation: With CSS, the content and structure of a web page can be separated from its presentation and styling. This makes it easier to make changes to the layout and appearance of a web page without having to modify its underlying HTML code.

2. Cascading style sheets: CSS uses a cascading approach to style sheets, meaning that multiple styles can be defined for the same HTML element, and the most specific style will be applied. This allows for greater control over the presentation of web pages.

3. Reusability: CSS allows for the creation of reusable styles that can be applied to multiple elements across a website. This reduces the amount of code needed to style a website and makes it easier to maintain.

4. Flexibility: CSS provides a wide range of styling options, including layout, typography, colors, and backgrounds. This allows for greater creativity and flexibility in designing web pages.

CSS is a powerful language for styling web pages that allows developers and designers to separate the content and structure of a web page from its presentation and styling. Its features, including cascading style sheets, reusability, and flexibility, make it an essential tool for modern web design.