Customizing the default font style and color from forms and registration pages

Hi, your plugin has a default italic blueish colour theme which I want to get rid of from the registration page, Help question mark button, from the inquiry pop up form. It’s not possible to change them I tried everything. Even though it is inheriting the font It has this italic format which is not matching with my theme. Please let me know if there are CSS to customize these things.

I need help with:

1. Default Font italic styling to theme font normal styling
2. Default colour change from Help Mark, Inquiry form and other places.
3. How can I customize the default inquiry form?
4. Registration page title “Registration is overlapping”
5. How can remove the circle from the membership pricing plan. It is overlapping with the price.