Styling Query Multiple Taxonomies Filter Form

Hello!

First of all, I`d like to thank the developers of this beautiful plugin – it is really useful and easy to use.

Second, I am really far from being good at technical knowledge, so please forgive me my incompetency. So, Id like ask you a question – how can I style the Filter Form, created using Query Multiple Taxonomies?

Previously I had to style the Contact Form 7 form in the following way: I found a piece of code over Internet which I simply put into the style.php file and it worked fine for me after certain adjustments of colors and borders. Can anyone give me any tips on how can I do the same with Query Multiple Taxonomies? I basically need to style submit button but styling of drop-down menus and default texts in the form (Reset, etc.) would be just fine.

Thanks!

https://www.ads-software.com/plugins/query-multiple-taxonomies/