I just got a new bike and was adjusting its disc brakes when I noticed hydraulic fluid was dripping out. I was pretty sure I only loosened the adjustment bolts, but checked and tightened everything back up and now when I pull the lever, nothing happens. I pull it all the way in and nothing. What did I do? And I still haven't figured out how to adjust the brakes properly!

The brakes are Hayes, though I'm not sure which model.

Thanks