Stratos: change the css or where?

I'm using the Stratos template and I'm very happy with it. However, I have one issue I haven’t been able to solve.

In buttons and headings, every word is automatically capitalized — for example, “Start Here” — and I would like to disable this. I want the text to appear exactly as I define it in the settings, such as “Start here”.

Where and how can I change this?

Thanks in advance!