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CSS (Cascading Style Sheets) is the language used to style web pages. It describes how HTML elements should be displayed on different media such as screens or paper, controlling aspects like design, layout, and variations in appearance. CSS is used to define and manage the visual presentation of websites, including how content looks across different devices and screen sizes. It also saves significant work because styles can be stored in external .css files and reused across multiple pages—meaning you can update the look of an entire website by changing a single stylesheet.
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External stylesheets are CSS files stored separately from HTML documents. They contain rules that define how elements should appear, including colors, fonts, spacing, layout, and responsive behavior. An HTML page can link to an external stylesheet so the same styles can be reused across multiple pages. Using an external stylesheet saves time and promotes consistency across a website. To change the site's overall appearance, you can edit the shared .css file once rather than modifying every HTML page individually. This makes site-wide maintenance, redesigns, and style updates more efficient.
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