Website has weird bug after I edited some html
I'm hoping someone could help me with this. This is the site: http://hotwokscoolsushi.com/
I was trying to replace one pdf with another on my website, and ended up not going through with it and reverting all the changes. Or so I thought. I'm pretty sure I ended up not changing any code, but now when I go on my website, it stays normal for a few moments, with a black background, and then suddenly it changes to white and the page shifts to the left. Can any tell me what's wrong with it?