The warm_dir was a unit vector (norm=1) but LCS chroma vectors have norms ~40-46, so color_temperature=0.5 only shifted chroma by 1.2%. Scale warm_dir by mean anchor chroma magnitude so the shift is proportional. Slider range narrowed from ±2.0 to ±1.0 and preset values adjusted accordingly (Warm=0.15, Cool=-0.15, Cinematic=0.05).