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Cascading Common Stylesheets (CSS) is a language used commonly to describe the visual style of web pages written in HTML and/or XHTML. Together with HTML and JavaScript, CSS is the vital element for creating user interfaces for web sites, and mobile applications.

Including aspects like layouts, colors, and fonts, CSS is designed primarily to enable the separation of presentation and content.

The CSS specification is maintained by World Wide Web Consortium (W3C) and the Internet media type (MIME type) text/css is registered for use with CSS by RFC 2318

Beside previous specification, CSS3 has been divided into “modules”.

Important CSS3 Modules

  • Selectors
  • Box Model
  • Backgrounds and Borders
  • Image Values and Replaced Content
  • Text Effects
  • 2D/3D Transformations
  • Animations
  • Multiple Column Layout
  • User Interface

CSS3 features a lot of new elements like border-radius, background-origin, RGBA, HSLA colors, opacity, radial and linear gradients, text shadow effect, word wrapping, translate, rotate, scale, and skew elements.

CSS3 Taxonomy

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