Roman shades over each individual window. That allows the window placement to be seen.

Inside mount so trim is exposed.

Here are some ideas

Romans are usually mounted to the top, not the sides, so they could work.

Wouldn't that leave a small gap at the top?

No, they’re mounted to a board and drilled right thru to the top.

OK, like a very small flat slat? That could work. ; )

Yes a 1 x 2

Cool!

I'd use one long rod mounted about 6" above the tallest window and have a pair of center draw drapery panels.

Thank you all for the great suggestions--I definitely have some options to consider now!