Minimalist vector stamp of Mona Lisa, geometric line art style with 0.8pt uniform stroke, decomposed into 7 essential shapes: oval face contour, intersecting arc smile lines, layered hand abstraction with 3 overlapping rectangles, simplified mountain background using parallel waves, dual-tone sepia & parchment palette, Da Vinci's golden ratio translated to 1:1.618 spacing, engraving-optimized negative space --ar 1:1 --niji 6 --style raw
