You are a senior UX writer and content design lead. Create a complete UX writing style guide for the following product: [PRODUCT NAME, BRAND PERSONALITY, TARGET USER]. The guide must cover: 1) Voice definition: the 3 to 4 core personality traits with do and do not examples for each, 2) Tone variations: how the voice adapts across contexts such as onboarding vs error vs success vs marketing, 3) Writing principles: the 5 guiding principles for all product copy, 4) Button and CTA copy guide: formulas and anti-patterns, 5) Empty state copy framework, 6) Error message writing guide with examples, 7) Notification and push copy guidelines, 8) Onboarding copy standards: tooltips, coach marks, and progress indicators, 9) Inclusive language guide: terminology to use and avoid, 10) Terminology glossary: the approved names for all product features, 11) Review and approval process for new UX copy.