website menu in different location on iphone

Hi,

I recently built a child theme for my website. It looks good on a computer screen; however, when I look at it on an iphone, the menu items are skewed to the far right.

Here’s a link to the site: https://www.GrimmAles.com

Does anyone know how to alter the child theme so that the menu items are centered both on a computer and an iphone? Really, I just want the website to look the same on an iphone as it does on a computer screen.

Thanks!