In other words, we use HTML to define the structure and the meaning of a page, while we use CSS to specify its visual style. CSS works in combination with HTML.

How do I learn to code in HTML and CSS on my Mac? Web design is one of the most useful skills you can learn, and it’s easy to learn HTML and CSS (the two main pillars of web pages) in Mac OS X.

Create an external style sheet when you want to make CSS styles available for multiple website pages. Insert the styles in the style sheet without the " " codes and save it with a ".CSS" extension.

Create a section for your CSS style sheet in the header of your HTML page. Link to an external CSS style sheet as an alternative for larger stylesheets.