Joomla! Template Cosmo PT - Item Support

Where would I change the line height for text in the main content position? There are so many css files, I don't know where to start. I'm using the default theme btw. Thanks in advance
Never mind my previous question, the line height actually looks good in the template. I pasted text which had different formatting.

Item Name:
Cosmo PT
Sales:
208
Created:
2012-06-20
Updated:
2015-01-15
Item Version:
5.0.0

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