Design a sleek, modern icon symbolizing an application development environment. The icon should feature a minimalistic representation of coding elements such as brackets, a gear symbol for configuration, and a stylized code editor window. Use a dark background with vibrant blue and green accents for the code, and a clean, tech-focused font for any symbols. The overall design should convey efficiency, innovation, and creativity, with a polished, high-tech appearance, suitable for both mobile and desktop development tools.