class "btn" in article

Is it possible to use the button-style in header ("discover our restaurant") in articles or modules. When I use "btn" beyond the header it looks not as desired.

Hi,
so create for it a new class, or grab class from other class and use here.
It's quite simple if you know CSS3 basics.

Thank you Oscar, I hoped there is an easier way to edit.
In my opinion it would be great if the adjustments of the template would be more user-friendly and allows more options to edit without time-consuming writing/changing source-codes.
Don't get me wrong, the template is great with a lot of possibilities but it takes also a lot of time to adjust it the way you want.

I fully agree with you,
maybe that's why some webmaster uses shortcodes plugins which include bootstrap css3 elements like buttons etc.