Summary 3
One page vs Multiple
CSS styles can either be imbedded into more than one or just one section. Unless specified, the CSS will be applied to all. You have to create and specify a specific portion such as style for heading on index.
How to Style
There are two parts to setting a style. One you must list the part that needs to be styled. Next you have to put a colon to then define the style itself, like color.
Specifics
One can add specific tags within a set. Say if one wants to make a word in a sentence italic, they can. They can also make the word red on top of being italic