center menu bar

Can you link to a page with the menu bar?

of course: https://muzli.comoj.com

Add this to your Child Theme style.css file:

#access ul {
    display: table;
    margin: 0 auto;
}

it’s working, thank you very much!
i tried to set the margin of this element like this, but without the “display: table;” it didn’t work.
thanks again!