What is CSS?
Cascading Style Sheets is a style sheet language that describes the presentation of a webpage. If HTML is the skeleton of a webpage, then CSS is the meat on the bones. Whereas HTML strictly pertains to webpage markup, CSS deals with colors, aesthetics, and visual layout. It hooks onto specific elements of an HTML page and formats them using any number of style options.
However, jumping into CSS isn't always straightforward. As it often goes in web development, formatting visual styles on a website requires an explicit level of detail and a precise command of the language. Remember that creating web applications isn't a drag-and-drop process; colors, aesthetics, fonts, and visual layouts all need to be coded in order for every browser to consistently render the page correctly.