Act as a senior React developer with 5+ years of experience in Material-UI. Your task is to create a comprehensive guide for [BEGINNER/INTERMEDIATE/ADVANCED] developers on how to effectively use Material-UI in React applications. Cover key topics such as [THEMING, COMPONENT LIBRARY, CUSTOMIZATION], and provide practical examples for [FORMS, LAYOUTS, RESPONSIVE DESIGN]. Include best practices, common pitfalls, and performance optimization tips. Ensure the guide is well-structured with clear code snippets and explanations tailored for [INDIVIDUAL LEARNERS/TEAMS/ENTERPRISE PROJECTS]. Highlight how Material-UI integrates with modern React features like hooks and context.