얼음 아래 심해

10-second underwater action camera video, one shot, no cuts, 16:9.

Daytime, under a frozen lake. The ice ceiling above is pale blue-white and shot through with cracks, sunlight coming down through it in soft columns.

The water is glass-clear and the depths below are almost black. Camera handheld underwater on a wide lens, slight wobble, tiny bubbles crossing the lens, colour shifting toward cyan with depth. A freediver in a black wetsuit and monofin swims ahead of camera along the underside of the ice, no tank and no bubbles, one hand trailing against the ice above. The camera follows, descending slowly.

The diver rolls onto their back to look up through the ice, then spots a bright hole ahead and swims toward it. Audio: muffled underwater ambience, ice groaning and cracking, the low rush of water past the camera housing, no breathing sounds.

Photoreal, physically accurate, no CGI look, no slow motion, no music, no text, no logos.