clutch won't shift on 1997 Honda Accord

My son has a 1997 Honda Accord LX with a 5-speed manual transmission. He says that he cannot get car out of neutral this morning after driving it two days ago and parking it. Does this car have a hydraulic clutch, and if so, what is the fluid designation for it? I am not located near the car.

Thanks for your assistance.

Asked by for the 1997 Honda Accord
It does have a hydraulic clutch and uses Dot3 brake fluid