Various CSS fixes

VladimirAus → closed merge request !19

To comment #5: Bootstrap v 5.3 will have proper theme dark/light modes, that's when proper colour theme will be implemented (currently it's a bit of a manual process as link colour is defined as a single sass variable, where in 5.3 there's a dark theme sass)

Thanks for all the issues fixed! Merged! 🍻

Committed and released! 🥃

Automatically closed - issue fixed for 2 weeks with no activity.