Off-Canvas Menu

Hello Folks !

I tried my best.
Put about an hour into it.
Could not find a solution.

Not a complaint.
Just want you to know that
I tried first before asking
for help.

Please go to:
https://understand-culture.com/

Click on the menu top-right.
Then choose Contrasts_Process.

“Discipline vs. Deviation” is the sub-submenu
which stretches furthest to the right.

See at both the top (Countries) and the
bottom (Patterns) of the off-canvas menu
the dark-gray background of the main content-
space bleeding to the left into (overlapping into)
the off-canvas menu.

If I recall correctly that is the main
container on the site which houses the
content.

Unfortunately, I could not find the settings
which would enable me to reduce that container’s
left margin so that it no longer overlaps into
the off-canvas menu.

Please point me to that setting.
Or is a CSS necessary?

Thanks !

John