Rest Countries API build with React, Typescript, Tailwind, Vite

Hi, I would love some feedback on this project.

The parts I found the hardest -

• setting up Vite for the first time there are lots of bits to get right
• writing tests for the parsing of the JSON input from the RestCountries API while using Typescript, where the incoming data is of unknown type
• what behaviors to implement for the search input

I have one specific question - I implemented 'dark mode' with Tailwind. It worked perfectly on my desktop but on my mobile the dark and light themes were reversed i.e. the colors were dark when dark-mode was off and vice versa. No idea why???