Clutch pedal still has full pressure behind it, feels completely normal... the hydraulics seems fine, so I'm leaning away from master cylinder / fluid.
When you put it in gear with the car off, have you tried starting it in gear with the clutch in? Does the car move even with the clutch in? I'm assuming some portion (either the fingers or ring or something) broke on your pressure plate if the car still moves while it's running in gear with the clutch in.