FP Default Styles & Overrides Not Consistent when Building React (Gatsby) Project

Struggling with the proper way to override certain CSS settings being pushed down with the package . Using the fullPage.js React Component (part of a Gatsby build), and have not had any luck finding this question correctly answered.

I found this, which is the closest issue to what I'm facing:
[Link to Simliar Issue](https://github.com/alvarotrigo/react-fullpage/issues/45)

But in the 3.0.9 release, that reference isn't even called so commenting this out does nothing. I do see the "exports.push" (line 1696) in the dist/react-fullpage.js that seems to set everything (visible in the head tag), and can certainly adjust here - but this would be overwritten with any releases, refresh of node_modules, etc.

Ultimately, I want better control over the "fp-tableCell" to get my layout to work. Can you please advise the proper way to adjust any of the default CSS settings from a Build perspective?

For clarity, in a local development mode (e.g. gatsby develop), a simple override.css file is sufficient, and that isn't carrying forth to the build. The issue mentioned above is a few years old, and it appears further changes have been made to fullPage.js. Some of the overrides do actually carry forth to the build of the project, e.g.

```
/* This below adjusts the color of the Active Nav Tooltip */
#fp-nav.fp-show-active a.active + .fp-tooltip,
.fp-tooltip {
color: blue;
}
```
My current challenge is with the styling for fp-tableCell, but sure I will encounter some others as we are adjusting and would appreciate a definitive answer on how to correctly override any of the default fp stylings.

Thanks in advance for any support!