Mazda Miata 94 Clutch goes to the floor Fluids are fine Worked fine yesterday Any ideas

When you turn the key to start, what happens ? Does the engine turn over and not start ? Or does it not do anything ?

When you say that the starter seems ok, have you tested it ? Did you jump starter/solenoid and see if the engine turns over ? Are you getting power to the starter when turning the key to the start position ?

Thermostat is most probably the cause ( its Stuck )

sounds more like a seal to me

when it dies does it have spark?does it have fuel?does it not have either like a bad crank sensor

inspect your slave cylinder and your fluids last my be needs a clutch

The one item I would suspect is the through-out-bearing not completely disengaging the pressure plate from the fly wheel. If the vehicle is in neutral and you slowly depress the clutch and release it do hear a singing or whining sound? Since you cannot adjust the clutch any more the through-out-bearing is the component which moves the pressure plate from the fly wheel to stop the power from the engine to the transmission. It is difficult to shift when the engine is on because the fly wheel is still engaged and powering your transmission.

The hydraulic clutch command has failed - either at the pedal pump or at the clutch cylinder. Verify first that the line to the clutch cylinder isn't severed; if it isn't the disconnect it, plug it so it doesn't leak and try to press the pedal -if you can the the pedal pump is faulty, if you can't it's the cylinder. 
Either replace the corresponding seals or replace the entire part.

You need to Change the Thermostat.

either the throw out bearing has failed ot the clutch plate hub has failed
possibly from the clutch plate being installed incorrectly and the hub springs are hitting on the flywheel bolts

you have to reset your computer..it is kind of tricky..you have to pump the gas pedal three times on the third time hold it to the floor turn the ignition to on position then off then start the car it should reset it..