MKZ wont start/ actually turn over

What is your question?

My mkz wouldnt start yesterday morning, it would click under the dash, the lights would gou out when they were supposed to,no problems with the security system. I did a complete system reboot by unhooking the battery for 30 min. it started twice after that but on the third stop there was no way she was going to turn over,Ileft the battery unhooked for an hour and a half. Its already cost me one shift at work I cant afford to loose another. any ideas?