IMHO the things that OP wanted should not be part of the website: Narrower columns? Adjust the width of your browser window. Nicer Fonts? Those should be a use

IMHO the things that OP wanted should not be part of the website: Narrower columns? Adjust the width of your browser window. Nicer Fonts? Those should be a user preference, not served by website - I see the OP agrees with this... Dark Mode? That should be a function of the DE, or maybe the browser, but not the web site. Everything about this work says "I want to control the look of web pages on my end."