[Maintenance]: Change the tailwind styling to use the mobile first approach.

[Colin23]

🎯 Task

In tailwind the default for styling is mobile first. We started the styling of the website with desktop (1080P). To adhere to the tailwind standard and to clean up some styling, we should change it to mobile first.

🛠️ Action

Delete the custom mobile and desktop tags for styling and start styling the website for mobile and where necessary use the tailwind defaults, e.g. md, lg, and so on.

🙋‍♀️ Are you willing to implement this maintenance task?

Yes, I'll do it!

📝 Code of Conduct

• I agree to follow this project's Code of Conduct

[Colin23]

We might want to always develop with desktop first in mind, as this is the majority of the user base.