I found that using w3.org's CSS validator shows reference to the page's URI as '[...].php'. http://jigsaw.w3.org/css-validator/validator?uri=https%3A%2F%2Finoad

I found that using w3.org's CSS validator shows reference to the page's URI as '[...].php'. http://jigsaw.w3.org/css-validator/validator?uri=https%3A%2F%2Finoads.com%2Farticles%2F2020-01-09-Next-Gen-Static-Blogging&profile=css3svg&usermedium=all&warning=1&vextwarning=&lang=en#warnings http://jigsaw.w3.org/css-validator/validator?uri=https%3A%2F... With that and the author's mention of using PHP for a custom blogging setup, I'm guessing it's being dynamically generated by PHP still.