Before knowing beforehand CSS us back into the past and see the history of CSS itself
CSS level 1 to W3C Recommendation on 17 December 1996.
CSS level 2 became a W3C Recommendation on 11 January 1999 (other sources: May 12, 1998). This level is characterized by the addition of support for media (printers), downloadable fonts, element-positioning and tables.
Draft of CSS level 3 is published by the W3C on May 23, 2001 and continue to be developed until now. The hallmark of CSS Level 3 is developed
a modular basis.
Currently CSS implementation.
Many features are included since the first specification in 2000, though not many browsers that support these features until 2006.
Currently the major browsers (Opera, Firefox, Chrome, IE and Safari) partially and gradually (read: slow) began to enhance its support for CSS3
Cascading Style Sheets or CSS disingkatan is a text-based language used
to format the display of web pages created by HTMLrangkaian contains instructions that determine how North a text to be displayed on web pages. Designing the text can be done by defining fonts (letters), colors (colors), margins (size), background (background), font size (font sizes) and others. Elements such as colors (colors), fonts (letters), sizes (size) and spacing (distance) called "styles". Cascading Style Sheets can also mean putting different styles to the layers (layers) are different. CSS style sheet consists of telling the browser how a document will be presented. The new features on the old web pages can be added with the help of style sheets. When using CSS, you do not need to write the font, color or size in each paragraph, or on any document. After you create a style sheet, you can store the code once and can re-use it when needed.