CSS stands for Cascading Style Sheets. In web development, Cascading Style Sheets (CSS) is a stylesheet language used to control the layout of web pages. Its most common application is to style web pages written in HTML and XHTML, but the language can be applied to any kind of XML document, including SVG and XUL. CSS is used to help readers of web pages to define colors, fonts, layout, and other aspects of document presentation.
Style Sheet are simply text file (.css) compose of lines that tells browsers how to display a html page. It is designed primarily to enable the separation of document content (written in HTML or a similar markup language) from document presentation (written in CSS). This separation can improve content accessibility, provide more flexibility and control in the specification of presentation characteristics, and reduce complexity and repetition in the structural content.
In CSS, a style is a grouping of different properties given a common name. If you were to re-create this paper for the web, you could define styles for the text on your title page, outline page, and so on. For example, you can create a style called myHeadings and specify its font properties to be bold and have a font-size of 14pt. A specification of a property is known as a rule. With a style established, whenever you type in text for a my heading, you can set it to the myHeading style and all of that style's properties are applied to the selected text in one step. Later, if you decide to change the font color or some other aspect of the style, you can just change its definition or specification in the style sheet and the appearance of all text marked with that style will change throughout the webpage or website.
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