CSS is used to control the style of a web document in a simple and easy way.
CSS is the acronym for "Cascading Style Sheet".
A CSS selector is the first part of a CSS Rule. It is a pattern of elements and other terms that tell the browser which HTML elements should be selected to have the CSS property values inside the rule applied to them.
CSS can be added to HTML documents in 3 ways:
CSS Designer provides a visual interface to help define the layout and positioning aspects of CSS.
A CSS rule consists of a CSS selector and a set of CSS properties. The CSS selector determines what HTML elements to target with the CSS rule. The CSS properties specifies what to style of the targeted HTML elements. ... CSS rules have to be specified inside either a style element or inside an external CSS file.