CSS - Css Shorthand Help

Hello,

I'm taking over management and development responsibilities from the developer who rebuilt our site. He did an awesome job and everything is well structured and clearly commented so I've had a pretty easy time getting around his code and making the tweaks I want.

I need to make a simple CSS tweak but I'm unfamiliar with shorthand and need some help.

The rule sets the style for paragraphs with the class "author_desc", i.e.

Code:

<p class="author_desc">This is some text</p>

This is the CSS rule for the "author_desc" class:

Code:

#col_02 .feature_body p.author_desc { color: #a7a7a7; font-size: 1.3em; text-indent: 0; font-family: Arial, Verdana, sans-serif; font-style: italic; margin: 20px 0 0 0; padding: 0;}

I need to add an additional rule that would render any italicized text in the paragraph as normal, i.e.

Code:

<p class="author_desc">This is my body text that is italicized, <i>but this is regular text</i>. Now we're back to italicized again.</p>

How would I write the needed CSS for this?

Thanks for your help!