Buttons up to the border

https://preview.webflow.com/preview/guillaumes-stunning-site-2ed241?utm_medium=preview_link&utm_source=designer&utm_content=guillaumes-stunning-site-2ed241&preview=705925413b896c0b39261ea233880ff8&workflow=preview

I try to make the buttons goes all the way of the side menu, General, Account, System, etc… but if I do so I lose the far right edge blue line on the border. Like if I mouse hover it becomes blue but not all the way and once selected it is another tint of grey and a little blue line on the right border appears. I want all that to go the entire side menu.

It has been a long time that I am trying to figure out why I can’t do it. Thank You