How to include, how incorporate CSS in HTML
One of the main features of CSS is flexibility and the different options it offers to perform the same task. In fact, there are three options for including CSS in an HTML document:
Include CSS in the same HTML document.
Define CSS in an external file.
Include CSS in HTML elements.
1. Include CSS in the same HTML document - How to add CSS to HTML in the same document.
CSS Styles are defined in a specific area of the HTML document.