I am feeling stronger and am having less brain fog.
I managed to finaly finish a test webpage that should (fingers crossed), work on all devices — albeit (by design) differtntly. It’s a revised version of a 1925 CCC by Cousin Stella LOOP Wilbur. It’s designed to adapt to the device it’s viewde from — computer (or tablet), smartphone in landscape position, or smartphone in portrait position. I think it now works properly. Please take https://www.campbellluggblackwell.com/CCCV3p015StellaWilbur_testa.html for a test drive and let me know how you fared.