Ethereal Underwater Ballroom Waltz

4K 2.39:1 cinematic slow-motion sequence, 90 second runtime, ethereal photorealistic underwater style. Opening wide tracking shot glides 10ft above flooded grand ballroom floor, warm glowing chandeliers cast dancing caustic gold light across marble. Young woman with flowing black hair, porcelain skin, deep red silk gown moves in weightless waltz, fabric billowing like liquid ink. Slow smooth camera orbits her as tiny silver fish swirl in ribbons, air bubbles rise in glittering columns. Drifting sheet music, rose petals, champagne glasses float past; tilted grand piano keys move gently with water currents. Mid-sequence slow close-up catches her calm dark eyes mid-spin, hair and gown unfurling. Final upward dolly follows as she ascends, soft volumetric god rays filter down from surface, she reaches one pale hand slowly toward the lens. Ethereal blue-gold color grade, perfectly smooth motion, natural underwater physics, dreamlike meditative pacing.