Twice I had tried to upload your file, both times getting some 'internal service' issue (or was it 'infernal...') so the link above is to your file in my dropbox.
I have ripped out the 'grid' stuff from the 'room' container and applied flex instead. The contents are now sitting in the middle all the way up. If you agree with it, you need to add back in the margins/padding you had, and maybe adjust the width of those smaller boxes.
I don't do grid, so if you wanted to stick with that, you need to ask someone else.
Inger, Norway
My work in progress:
Components for Site Designer and the HTML Editor: https://mock-up.coffeecup.com