CASCADE STYLE SHEETS which is simply called as CSS is one of the nicest and advanced styling languages came up with the development of technology and this is the main styling language which is used for HTML documents. CSS defines how the HTML elements should be while HTML creates the page structure. CSS is easy to learn easy to use and well performing. CSS allows you to style the HTML elements without including the codes in the same HTML file. You can separate the codes and include them in a new file and link that file to your HTML document. CSS structure CSS structure is very easy to understand. Enter the ID, class or tag name, then open curly brackets and write your code within those brackets. body{ background-color:red; font-size:25 px; } When selecting the elements there are 3 different ways and we'll talk about it later. Adding CSS You can add CSS to your HTML files using 3 different ways. Inline CSS Internal CSS Extern...