need help?

My 98-eagle talon has a clutch engagement problem. This happened without warning. The clutch is not engaging at all. I did get it home by forcing it into gear and it did not slip after it was in gear. It looks as though the slave cylinder is pushing, but I don’t know if it is pushing far enough. The master cylinder has plenty of fluid and hasn’t been leaking. The fluid is dark. Could this be clutch or master cylinders?