what is css

CSS stands for Cascading Style Sheets, which is a style sheet language used for describing the presentation of a document written in a markup language such as HTML or XML. CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript. It is designed to enable the separation of content and presentation, including layout, colors, and fonts, which can improve content accessibility, provide more flexibility and control in the specification of presentation characteristics, and enable multiple web pages to share formatting by specifying the relevant CSS in a separate .css file, which reduces complexity and repetition in the structural content. Before CSS, all of the stylizing had to be included in the HTML markup, which made the actual HTML markup much larger, more complex, and difficult to maintain. CSS allows developers to stylize everything on a different file, thus creating the design there and later integrating the CSS files on top of the HTML markup. CSS can be used for very basic document text styling, creating a layout, and even for effects such as animation.