Add appearance: button for cross-browser compatibility with -webkit-appearance: button

[in-ch]

Clear and concise description of the problem

link: https://github.com/jquense/react-big-calendar/blob/master/src/sass/reset.scss

Currently, the CSS for button styling uses only -webkit-appearance: button, which ensures consistent styling across WebKit-based browsers (e.g., Chrome, Safari). However, the CSS property appearance: button is now part of the standard specification and is supported by a wider range of modern browsers, including Firefox.

To improve cross-browser compatibility and align with the CSS specification, we should include appearance: button in addition to -webkit-appearance: button. This will provide a more consistent button appearance across all major browsers that support the standard appearance property, while maintaining compatibility with older WebKit-based browsers via the -webkit-appearance fallback.

Suggested solution

Add appearance: button; alongside -webkit-appearance: button; in the button CSS.
This will ensure that browsers supporting the standard appearance property apply it, while browsers that rely on -webkit-appearance will continue to function as expected.

Alternative

No response

Additional context

No response

Validations

• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

Would you like to open a PR for this feature?

• I'm willing to open a PR