[FEATURE]: Overview page fourth iteration

[Robin1224]

Create the fourth iteration of the overview page. Do a full redesign, making the website look more professional and calm. Try to create a sleek and clean atmosphere but do not make it too "AI startup"-ish. The colors can also be tweaked a bit to make some more easily usable and accessible color combinations, should this be relevant.

Also incorporates some of the tasks originally on the third iteration, as I felt that these tasks were better done after a redesign, rather than before, so that I wouldn't basically have to do them twice.