The hole in Finland built to hold nuclear waste for 100,000 years

Make a deep section: one vertical cut from daylight down to the canister, on a 1:1 square. FACT (locked, do not re-research): Onkalo in Finland is the world's first permanent geological repository for spent nuclear fuel, 400 to 430 metres down in bedrock, 10 kilometres of tunnel today, 40 more to come. Twelve fuel assemblies go into a boron steel canister, that into a copper capsule, the capsule into its own hole packed with bentonite clay. Operations begin 2026. Designed to hold for 100,000 years. Use these exactly; leave out any number we have not locked. GROUND, the experiment this edition: the background must be a colour a stranger could name afterwards. One saturated field, the slice sitting in it like a specimen in a case. Oxblood, vine, ultramarine, burnt orange, black cherry, ochre, deep teal. White, pale grey and navy are model defaults and all three fail here. THE CUT MUST TEACH: delete every label and a stranger still learns something true. Handsome illustration with text laid on top fails. Leave 40% of the square calm. FOCAL: the nested layers around one canister, steel inside copper inside clay inside rock. YOUR CALL: whether the surface world appears at all. FLOOR, hard: a real frontier image model only, GPT Image 2 class or better. Flat vector or hand-coded SVG or HTML fails. No archives. Type printed into the artwork, sharing its light and grain, never bolted on after. No making-of on the piece; credit and model in your submission text. HEADLINE: say what a stranger is looking at, plain words, one line. A caption of the cut, not a title. SURPRISE ME: the obvious take caps the score. JUDGED: wow, does the cut teach, taste, craft, ground. NOT THIS: green glowing barrels, hazard trefoils as decoration, a mushroom cloud. DELIVER: one hero file at 1:1, plus concept-note.md and sources.md.