Strange clutch problem

All Saabists first have a healthy New Year, power and success. May the Saab run for all eternity. Have problems with the clutch since my return from Luxembourg. The clutch pedal stays down when I press the clutch. The level of the brake fluid is between Min and Max. Now the car stood a few days and I have noticed that the level of the brake fluid has risen far above Max. Engine started and the level sinks again between Min and Max. Could it s Is there any air coming into the system? Couldn’t detect leaks. Everything so dry. Or is that the driver cylinder? Only the level of the brake fluid remains at the same level between Min and Max, no matter how often I press the clutch. If a cylinder had a leak, would the brake fluid level have to sink steadily or am I wrong? Does someone ever have the quickest new year’s tip ready?