"Design two logos for a company named CDK that specializes in synthetic diamond production using hot filament CVD technology. One logo should be text-based with 'CDK' only, and the other should include a subtle illustration related to hot filament CVD. Both logos should be minimalistic and in a single color (black, dark red, or dark blue). The illustrative logo should not be overly intricate, and the hot filament element should be understated."