Establishing reference photograph of a place: 2D hand-drawn illustration, eye-level close view of a heavy steel blast door, firmly closed and sealed, with a high-tech keypad mounted beside it. The keypad glows steady red with illuminated buttons. Dark riveted metal panels, worn hazard stripes in electric yellow, thick door seams. The corridor is dimly lit only by the keypad's red glow and a small amber warning lamp above the door. Inked linework, muted dark metal palette, tense industrial sci-fi atmosphere, no sparks, no smoke, no people, no text.
No people, no visible text, no watermark.
