Navigation menu disappeared

I’ve made some wrong changes in my css and my pages navigation menu has disappeared. How to bring it back? I can’t show my pages. my site is أفلام اون لاين Past Papers

Hi, Welcome to Sitepoint:)

Where was the navigation menu?

I can see two tabs at the top right of your page that are within #menu and seem to be visible. Is there something wrong with these or is there some other menu that has gone missing ?