Dave, as you requested, I have posted the details of my problem here.
Sadly, I’m going crazy with this. I have been watching the video on recreating a Muse web page (with the parachute). The issue I have is with the scrolling clouds, which I cannot get to work properly. If I try to apply the movement to the clouds container (that contains the background image), either nothing happens, or everything moves all over the place (past the right and left margins causing the page to scroll horizontally) - including the light box, which, according to the video, is stationary.
The file I created is here:
The Webflow read-only file is here:
What did I do wrong?