what is css
CSS stands for Cascading Style Sheets
· Styles define how HTML elements are displayed
styles are usually stored in style sheets
Styles were added to HTML 4.0 to address the separation of content and presentation
· External style sheets can greatly improve work efficiency
External style sheets are usually stored in CSS files
· Multiple style definitions can be cascaded into one
Styles solve a big problem
Style sheets define how HTML elements are displayed, just as HTML 3.2's font tags and color attributes did. Styles are usually kept in an external .css file. External style sheets give you the ability to change the layout and appearance of all pages in your site at the same time by just editing a simple CSS document.
To solve this problem, the World Wide Web Consortium (W3C), the non-profit standardization consortium, took on the mission of standardizing HTML and creating styles outside of HTML 4.0.
Modern browsers support CSS .
CSS style sheets greatly improve productivity
Style sheets define how HTML elements are displayedStyle sheets define how HTML elements are displayed, just as HTML 3.2's font tags and color attributes did. Styles are usually kept in an external .css file. External style sheets give you the ability to change the layout and appearance of all pages in your site at the same time by just editing a simple CSS document.