Vector graphic style logo design of a technology and fitness brand, isolated on a solid flat pitch-black background.Central Design Elements:In the center, the letters 'AB' in a bold, clean, futuristic geometric sans-serif font.The 'AB' letters are perfectly framed by two sharp, minimalist, 90-degree square brackets, resembling programming code brackets on each side.The square brackets and the letters 'AB' are a solid, ultra-saturated, vibrant Cyan Blue color. STRICTLY FLAT COLOR WITH NO GLOW, NO BLUR, NO NEON HAZE, NO SHADOWS.Typography Alignment:Directly underneath the brackets, the word 'SYSTEM' in uppercase, clean tech font. The space between the letters of 'SYSTEM' must be wide enough so the first letter 'S' and the last letter 'M' align flawlessly and vertically with the exact outer edges of the blue brackets above, forming a perfect rectangular block.Below 'SYSTEM', in a smaller, thinner font, add the subtext 'HEALTH & PERFORMANCE'.Text Colors:The word 'SYSTEM' is a flat, clean off-white / light silver-grey color.The words 'HEALTH & PERFORMANCE' are a flat, subtle medium charcoal grey color.Style Constraints:2D flat vector, high contrast, symmetrical balance, premium software corporate branding.NEGATIVE PROMPT / FORBIDDEN: Do not include triangles, do not use heavy metal or rock band aesthetics, no textured background, no gradient glows, no 3D effects, no realistic mockups, no distortion."