Write a brand identity guide in a {{tone}} tone for {{target_audience}} using the Aaker Brand Identity System. Include: Brand Strategy Foundation (mission, vision, values, promise, positioning), Visual Identity System (logo, color palette with accessibility, typography), Brand Voice & Messaging, Photography & Imagery, and Application Examples. Keep under 1800 words. Use plain language. Skip any section if information is unknown. Paste any relevant background information after these instructions before running.