After trying to make a iframe embed media responsive, my whole page became invisible ->https://www.sirosestudio.com/audemars-piguet

Hello, 

I wanted to add css to make an embed media iframe responsive, but all it did was making all of my other block, header and footer invisible. After deleting every piece of css on the page, nothing came back. I can hover above each block and see their options, but can't see them at all. Please someone help !https://www.sirosestudio.com/audemars-piguet

Which iframe code did you add?