Well, the site's old fashioned look may be part of its charm, and kind-of lets it stand out from every Bootstrap Website ever, to say nothing of the grey-on-grey and with no corners-or-edges web style which is trendy in 2024 ( References: Modern Websites’ Style, nixdoc, Windows XP style, and the modern Web ).

That put aside, feel free to submit pull-requests, patches, or CSS fragments if you think they will improve matters.