That's because phone browsers have the insane braindead default of scaling everything into tiny unreadableness. You have to explicitly say "stupid browser, nobo

That's because phone browsers have the insane braindead default of scaling everything into tiny unreadableness. You have to explicitly say "stupid browser, nobody ever wanted this shit, behave sensibly by including <meta name="viewport" content="width=device-width, initial-scale=1.0">. No idea why this idiotic custom still hasn't been purged from mobile browsers, but I guess it's just a valuable tradition now... Before mobile browsers arrived, everything was fine and nobody needed meta viewport stuff. That's why this 1997 era page doesn't have it.