Hey man. Sorry to hear that!
Like everywhere on the internet, there are phishing sites. The original steemdice is reachable on steemdice.net which redirects to github hosting. Do never follow untrusted links and enter your papssphrase!
I reported the phising to heroku and they will take it down. Doesn't help you much - hope you learned your lesson!
Oh and they are using you name 😶 It is sad to see these kinds of scams on steemit but I hope people learn they need to be safe here as money is on the line and scammers are everywhere :/ Always hover over links and see where they are taking you people, better yet don't follow links at all. @tranquilpoem I'm sorry you had to learn the hard way, be safe!