The whole design is created by a main contributor and IIRC the style is called neobrutalism.
I think that the tells, if they are in fact legitimate, are negligible at best or subtle at worst. It looks like the site uses Tailwind, so if AI was involved it wasn't generating the design from scratch. If it did then I'm impressed because usually it sucks. This is alright.
Really? The website, you mean? :( I thought to myself, "what a cute, well designed webpage!" when I saw it. Maybe with time this site will stand out like those Claudeslop ones.