Authentication pages: Buttons, Sections & Spacing

1. The buttons and sections are currently not rounded. They should have rounded corners. 2 + 3. The spacing feels inconsistent depending on screen size and zoom level. Around 100% zoom, it looks too tight on my laptop but fine on my bigger screen, and when zooming out, it becomes too large. Ideally, the spacing could be standardized to around 32px on all sides for a more consistent appearance. So this doesn't only apply to the login page, it applies also to the signup page.