Why doesn't my button have a background, and how can I fix it so it does, as seen in the docs?

[fiery hornet]

https://codesandbox.io/s/dark-background-js8xfy?file=/src/App.tsx

it should show unless something wrong with the component that is containing this button

[dusky vault]

You've installed a third-party library that overrides Mantine components styles.

[unkempt drift]

Weird, I'm running a bare bones nextra site on next.js, no other packages besides that, and the minimum mantine packages

[dusky vault]

What about tailwind?