What is a CSS File and Why is it Important for Web Design

A CSS file, or stylesheet, is a document containing rules that define the appearance of a web page. It allows you to change colors, fonts, spacing, and other design elements, separating content from its visual presentation. The basic structure of a CSS file consists of selectors, properties, and values. For example, to make all the text on a page blue, you can use the rule: body { color: blue; }. There are different types of selectors, such as tag selectors (e.g., h1), class selectors (.class), and ID selectors (#id). It's important to organize your code with comments to keep it readable. For example: /* Styles for headers */ h1 { color: blue; }. Although CSS can seem complicated at first, with practice, it becomes a powerful tool for creating attractive and functional websites.