The ‘HTML’ part contains all the content, organized into a logical structure. This is the part that an author might be most concerned with: the words, chapter headings, figures, diagrams, etc.
While there have been numerous versions of HTML since its inception, our focus in this course is the most recent version, HTML5. HTML5 was developed to provide more powerful and flexible ways for developers to create dynamic Web pages.
The ‘CSS’ part (version 3 being current) is all about the presentation or style of the page; what it looks like without too much regard for the specific content. We’ll be going into more detail on that later in this course, but for now, think of it as the way you might specify a “theme” in a word processing document, setting fonts, sizes, indentations and whatever else may apply to what it looks like.