CSS

CSS stands for Cascading Style Sheet and is a computer language that is mainly used to stylize HTML code . CSS is always composed inside an IDE, or Integrated Development Environment. Every CSS document is always appended with ".css". To see how the CSS code alters the HTML code, simply open the HTML document in a web browser and it will display the code in a human-readable format.

Brief History of CSS:

• CSS was first introduced by Håkon Wium Lie on October  10, 1994.

• By the end of 1996, Level 1 Recommendation was published.

• The CSS working group began tackling issues that had not been addressed with CCS1, resulting in the creation of CSS2 on November 4, 1997.

• CSS3, which was stated in 1998, is still under development as of 2014.

CSS4?:

According to Wikipedia:

"There is no single, integrated CSS4 specification, because the specification has been split into many separate modules which level independently. "