Need Help with Responsive Tables for My Food Menu Website

Hi everyone,
I’ve created a food menu website on WordPress (https://sgfoodmenus.com) using the Kadence theme, where I showcase various restaurant menus in Singapore. While I’m happy with the overall design, I'm struggling to make the tables responsive for mobile devices.

Since I want to keep my site lightweight, I’m hesitant to add more plugins. Are there any CSS tips or best practices for adjusting table responsiveness in WordPress that you could recommend? Any help would be greatly appreciated!