Make it work on a phone
Most of your users are holding one.
Here is my page: <paste> Make it work from 320px wide upwards. Specifically: - Nothing scrolls sideways at any width. - Tap targets at least 44px, with space between them. - Text stays readable without zooming — no fixed pixel font sizes. - Tables and wide blocks handled deliberately, not just squashed. Tell me which changes were structural and which were cosmetic, and what to check by hand on a real phone.
Design at 320px first and the desktop version tends to fall out for free. Go the other way and you rebuild it twice.