programming-for-dummies

Cascading Stylesheets 483
If you have two external stylesheets that format the same text, define the
order to apply the external stylesheets by using multiple tags like
this:
Book V
Chapter 2
CSS
In the preceding example, the styles stored in the file2.css stylesheet
take precedence over the styles stored in the file1.css. Any styles stored
in the HTML code of your Web page takes precedence over any styles stored
in either the file2.css or file1.css external files.
The general rule is that text will be formatted according to the stylesheet
closest to the text. So an internal stylesheet is closer to text than an external
stylesheet, which is why styles stored in an internal stylesheet take precedence
over an external stylesheet.
If you want to create a Web page with a unified appearance, you might define
the formatting for every tag inside a single external stylesheet. Then modify
one or two styles (stored in additional external stylesheets or embedded in
the HTML code of a specific Web page) in case you want to format some text
differently.