[AndrewGSW]

Originally Posted by teedoff

Have a look at Specificity.

And btw, just so you know, there a 6 levels of heading tags. h1 through h6. You dont have to use h1 for every important heading or key title/phrase.

It is preferable to use h1 tags for your main headings, and h2 for sub-headings, etc. for:

Search Engine Optimization
Accessibility
Clarity

You can either give your various sections id numbers and target the headings within these:

#mainContent h1 { /* rules here */ }

or use class names for either the sections (preferred) or each heading:

.contentClass h1 { /* rules to apply to headings within sections with this class */ }
h1.headingClass { /* rules to apply to all heading 1's with this class */ }

To add a class to a div:

<div class="contentClass"><h1>My Main Heading</h1></div>