A bold fitness nutrition advertisement poster. A fit athletic woman in a sports bra and gym leggings holds up a giant unwrapped protein bar 3x her height with chocolate chunks visible, "POWERBAR" written in bold white on the dark brown wrapper. Dark dramatic gym background with motivational chalk writing on walls. Aggressive bold sans-serif typography "POWERBAR" in white and gold filling the background. Tagline bottom: "Fuel your grind." Small text top-right corner reads "Designed with GPT Image 2" in grey. Photorealistic, fitness nutrition commercial style, hard dramatic gym spotlight lighting.