Untitled AI art by @vigilant-summit2

"A sleek, professional book cover for Calculated Success: Outsmarting the House, Slowly but Surely. The design should have an elegant touch of gambling, incorporating the Fibonacci spiral subtly in the background, with hints of the Martingale betting system. The color scheme should be rich and sophisticated—dark green, black, and gold—evoking a sense of wealth and strategy. The title in bold, sharp, and modern typography at the center. The writer's name, 'Yhri,' in a smaller, more refined font at the bottom. Add subtle elements of gambling, like dice, cards, and a roulette wheel, blended seamlessly with the Fibonacci and Martingale symbols. The overall look should convey professionalism, precision, and a strategic approach to gambling." This should give your book cover a polished, strategic feel that matches your content.