On https://cryptpad.fr/notifications/, elements don't have a clear focus indicator and other buttons are not focusable:

For example: In the History section, I can navigate through notifications using the Tab key, but the focus indicator is unclear, it's just a blue line.

Additionally, the "Load More History" button is not accessible via keyboard. The same applies to user icons and delete notification buttons—they are clickable and navigate to the user's profile page, but they are not focusable for keyboard users.

The hover style is barely noticeable ( I propose the top and bottom padding to be bigger, and equally the same on every side):