YouTube button focus style issues

### Is there an existing issue outlining your problem?

- [x] I am using the latest version of the provided userstyle.
- [x] I have searched the existing issues and they do not solve my problem.

### What userstyles are you seeing the problem on?

lbl:youtube

### Describe your problem.

When focusing on buttons, the focus ring, or highlight does not contrast well from the outline of the button, or is unthemed.
Filled buttons seem to lack focus ring styling.

In YouTube Studio, some focus highlights appear to be unthemed, or do not have proper text contrast.

### Attach screenshots.

# YouTube Studio

### What browser(s) are you seeing the problem on?

Microsoft Edge Version 140.0.3485.81

### Any additional comments?

_No response_

Start by locating the userstyle entry labeled lbl:youtube and reproducing the button focus states in Microsoft Edge, including YouTube Studio. Compare filled and outlined buttons against the screenshots; done means focus rings and highlights are themed and provide clear text and outline contrast.

Written by the indexing model from the issue text.