Deterministic Black-Scholes-Merton European option pricing and Greeks. Returns price, d1/d2, full Greeks (delta, gamma, vega, theta, rho) in canonical and conventional display units (vega per 1%, theta per day, rho per 1%), plus intrinsic value, time value, and moneyness. Supports continuous dividend yield. Pure math from caller-supplied parameters — no market-data feed, no fabrication.