Oh no problem at all.
Do you mean you would like to show toolbar width similar like this banner?
https://take.ms/r8uTG
If that is the case, it seems like that is not possible to use css to show that toolbar to full width, you can check my screenshot here :
https://www.screencast.com/t/I34b5xF6
Perhaps you can try enable Easysocial toolbar module and display on the same position like that banner module position and see whether it can able to show full width?
If that is possible to show this, you can disable that toolbar from backend > Easysocial > setting > layout > toolbar > Display Toolbar .