CSS is designed to enable the separation of presentation and content, including layout, colors, and fonts.This separation can improve content accessibility, provide more flexibility and control in the specification of presentation characteristics, 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 as well as enabling the .css file to be cached to improve the page load speed between the pages that share the file and its formatting.

Syntax:
CSS has a simple syntax and uses a number of English keywords to specify the names of various style properties.
A style sheet consists of a list of rules. Each rule or rule-set consists of one or more selectors, and a declaration block.

Application:
Before CSS, nearly all presentational attributes of HTML documents were contained within the HTML markup. All font colors, background styles, element alignments, borders and sizes had to be explicitly described, often repeatedly, within the HTML. CSS lets authors move much of that information to another file, the style sheet, resulting in considerably simpler HTML.



 Uses of CSS:
CSS comes with a lot of flexibility and it supports the following features −

1)Compatibility
2)E-Commerce Domain
3)Website Maintenance
4)Social Media Impact
5)Web-based Online Community and UI Approach
6)Easy Accessibility
7)Image File Handling
8)Handling Dynamic Website Templates
9)Handling Flash Animation and Effects
10)End-User and Server-side Representation