@SomaFMrusty cursory look at your CSS i think a bunch of desktop-targeting width rules are not getting overwritten when in a thinner display regardless of viewport, causing the overflow and scrolling
the meta tag i always use is: <meta name="viewport" content="width=device-width, initial-scale=1" />. this should make CSS media queries responsive, otherwise you're always targeting 600px i think
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@SomaFMrusty you might need to start with a fresh CSS with that meta tag and re-add the old styling bits by bits until you find which ones are breaking
