Space Tourism Site Built with Next JS 13

Hey! This is my solution to the Space tourism challenge. I wanted to use this project as a chance to test Next JS 13 before I use the framework to create something big. Overall I had a pleasant experience with the app router, however I found the development experience a bit slower compared to the previous iterations of Next JS.

One other thing that I hope someone can help me solve, some CSS styles/properties disappear after a few route navigations. For example, the margin-block-start on the main content of the home page will no longer be there after 3-4 page navigations. I couldn't see anyone else having this issue, so if anyone can get me some points that would be awesome!

Some other things I would like feedback on include:

1. The style system, I tried to create consistent styling by placing much of the styling information in global variables. I found that maybe I did too much for the font-structuring.
2. Accessibility, I've recently been reading about accessibility and implemented a few things I have learned so far.
3. Project structure, since this was my first time using the app directory, I would like to know what other ways you have organized the project.

Thank you for taking the time to read this (sorry for the long text), happy coding!