This website, at least in dark mode, doesn't have any visible indication when text is selected.
... Which is additionally frustrating, since the links at the bottom aren't actually links (so you have to select them to copy and paste into your address bar)
I just cannot fathom the thinking behind presenting URLs but not linking to them. The author clearly knows something about all this (unless it's AI-written, but I don't think it is), so how have they made such a glaringly obvious mistake?
I'm half wondering if they're using a very strange CMS to publish this blog. The fact that they seemingly cannot use the correct double-quote character in their code blocks lends a bit of support to this theory.