Editing "Project" file in Joomla?

Editing "Project" file in Joomla?

I am working with a Joomla template and attempting to change the overall
font used throughout. I am using Chrome/Inspect element to search the
code. I found where to make the change in Inspect Element but I cannot
find where this file is anywhere in the directory.
The code appears in the "matched CSS rules" section of chrome's inspect
element. The path is listed as "domainname/templatename/:393
I assume this means line 393 but it does not tell me which file. Usually
this would tell me which css or php file to edit.
If I click on the link to show me the full file (this can be done in
Inspect Element) it just says "(program)" instead of something obvious
like template.css or index.php.
Does anyone know which file this would be? I have checked index.php and
many of the .css files but I cannot find where to make the change.
Here are 2 snapshots to show what I mean.
http://bit.ly/153W40n and http://bit.ly/1f7IJJW
Thank you,