Looking for a theme that looks like THIS

do you of a theme that looks like the one linked to below?

I have been searching for over a year for a minimal fullscreen theme that has a transparent header and loads pages semi-transparently overtop a fixed background image.

today i finally found the exact look i’m going for on this musician’s website: https://www.cosmosheldrake.com/

his site appears to be a heavily altered version of twenty eleven. i am not good enough at coding to replicate his page. Do you know of a fullscreen wordpress theme that functions close to or exactly like this?

thanks in advance for helping me end a year long search!