Yup if u haven't been here in 2-3 years this looks like a totally different website!
But don't fret, the site functions mostly the same. The biggest changes are the automatic closing after 48 hours of inactivity (which I absolutely despise this feature and the admins know about it), and the lack of a downvote button (which I don't like either).
Don't let the changes fool you, the sites still functions 90% the same. :)