Polaris CSS is breaking up my whole page because of HTML font-size 100%

I installed Polaris from npm @Shopify_77 /polaris

It also has a CSS that needs to be imported:

import '@shopify/polaris/build/esm/styles.css';

The Problem:

The imported CSS is MODIFYING my website’s CSS because the developers decided to add CSS styles directly to the HTML CSS selector!!!

html {
    font-size: 100%; <--- this causes HUGE issues
}

My website uses HTML font-size: 62.5%, which is equal to 10px. This is done to properly work with the REM unit.

Now I have a problem because my whole app needs my font-size size, but Polaris’ team decided to MODIFY the HTML structure, which is terribly wrong.

What are my options considering this terrible mistake from the Shopify development team?

NOTE: If I force my HTML style, then the whole Polaris components are way smaller than normal. If I keep what Polaris adds, then my other components look way bigger than normal.

Kind regards

Were you able to resolve this issue? Polaris is messing with my font-sizes too.