That’s the new interface so you didnt hit any keys by mistake. There used to be a way to switch it back to the old looks but i dont know if it still works. I wouldnt worry about it though, you’ll get used to it in a couple of hours. 
That’s the new interface so you didnt hit any keys by mistake. There used to be a way to switch it back to the old looks but i dont know if it still works. I wouldnt worry about it though, you’ll get used to it in a couple of hours.