Style sheets have become ever more popular each year as designers realize that whole web sites can be customized without too much fine editing. They allow properties for the whole site to be set, such as page color, link color, margins, text size, and much more. All of these can be keyed into a single file or in the main body of the code.
This is a typical usage of the class sector. Any text or lists that use the class name .menu will have several properties applied. Setting the margin to zero maximizes the width. The padding property keeps the spacing of the text to a minimum. The text will be aligned to the center of the page and will be assigned the Arial font type.
Here are a few examples that can be used to add a little extra static sparkle to an otherwise standard look:
Example A
Make the links block elements and give them padding and some style. Links will become black text on a white background, aligned to the center:
Specify the rollover style for links under the classes .style1 and .style2. There are a few settings here that may be of use. These lines show how hyperlinks can be styled differently. For consistency, choose one style and apply to all links in the same section such as the menus and main body text. A common use is to remove the underlines from hyperlinks using 'text-decoration: none' e.g. Hyperlink. Conversely, retain the underline on links by specifying 'text-decoration: underline' e.g. Hyperlink
There are many more examples of style sheet usage. I hope that this article has at least introduced the versatility offered by the use of style sheets. Feel free to play around with the examples in styling consistency into those web pages.
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Style Sheets 
HTML5 Boilerplate Introduction
