What is CSS3
CSS is a style language to control the style of HTML Markup. CSS controls the presentation layer of a webpage. CSS-3 is the latest version of our style sheet language of the web. CSS3 includes both CSS2, CSS 2.1 ( previous version of css) and CSS3 specifications. CSS3 is the third level of CSS specifications.
Some new features in CSS3 are new CSS3 selectors, rounded corners, box shadows, RGBA, HSL and HSLA colors, box sizing, Opacity, transitions, transformations, animations, embedded fonts and responsive webdesign .Here are the new features of CSS-3.
As CSS is a part of HTML5 now, we have to use CSS for all style related changes. Even we can't use HTML Attributes for styling, like, align, valign, color, bgcolor etc.