your site looks good. But I have found two areas that you can improve.
- letting the mobile menu opened If I change the viewport from mobile to desktop, the mobile menu still remains opened. You can make it more responsive by solving that issue.
- the buttons and other link tags are clickable when the mobile menu is opened. You can increase the z-index of the overlay div to secure all the content in bottom of it so they can't be clicked when the mobile menu is opened. That might be a good practice.
I am also learning. Thanks.