That web page looks great for my need.
It looks like the width dimension in a media query is the width of something like a viewfinder" - how many pixels in width are you giving the visitor device to re fit your web page. The shifting left of a floated right image is the device refitting the page a second time which occurs when the browser width is close to the width given in the media query. That’s just a guess.
In any event, that code should be enough for my need, let me see.
Thanks Paul