Hi @tuanphan!
This code was super helpful! I used it to create a separate gallery section to display on mobile, so I'll be able to have more control over the mobile arrangement.
However, with this, I lost the padding for the header on mobile! Would you know some code to just shift the images of the section down? (see the mobile version of this page: https://www.andrewjchristensen.com/drawings). I tried adding a blank section above it, but it messes up the scale of the background image... I'd rather the background of the gallery section continue through the header continuously, hence just needing to shift the images down.
*Little update: I tried adding this code, but it only moved the entire section down, leaving the header space empty/white.
I'm hoping to keep the background of the section extended all the way to the top. I don't really know code, I'm just finding bits here and there and assembling them mimicking the sequences I've seen...