Thank you for writing in, please inspect your Bar where your menu is placed and set the Outer Spacing to
0 and the Horizontal Flex Layout to
Next, inspect the Container, set the Max Width to
88% and the Self Flex to
Fill Space, also set the Horizontal Flex Layout to
center if you want the menu to be on the center of the container.
Remove all the sides (left and right) paddings and margins you applied on the Bar and Container, or else the Bar/Container will look off.
More information about Flexbox CSS:
A Complete Guide to Flexbox
Hope it helps,