Center header link blocks and keeping the header responsive

Hi everyone,

I feel kinda dumb asking this but i have no idea how to keep the links in my header in the center, while keeping the button on the right side of the header.

I need to keep the tablet and smaller devices visual the same.

Thank you for your reply

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

I forgot to add, you have to turn on the preview, there is an animation on the header