Please help me with the CSS code

Hi:

I just downloaded and installed the Simple Q & A plugin. I am not a techie so I am having some difficulty with the CSS code. I want the plugin to inherit the exact same font and size used in my theme. Please see this page where I have set up the Q & A plugin:

https://digitalentrepreneurs.network/ask-me-the-den-members-question-and-answer-forum/

I want the text to be same, font size to be same (only it should be bold in the question and normal in the answer and the line-spacing also has to be the same..

Also one small other help. I want more gap after the submit button so that the first question box is not touching the submit button.

If you can please help me with the CSS code, also please tell me if I should just past it into the CSS box on the plugin settings page?

Thanks so much in advance,

Regards,

Shobha Ponnappa

https://www.ads-software.com/plugins/simple-qa/