Misaligned hover styles on toolbar

I was planning to use this component but it contains an error in the demo.

https://stefan.app.fi/enhanced-rich-text-editor-demo/

<img width="517" height="109" alt="Image" src="https://github.com/user-attachments/assets/1f98005f-9d22-4861-85b8-86f720f0de0b" />