A clear, minimalist, and professional technical diagram labeled 'Data Flow Diagram: Context Level (Library Management System)'. The central element is a large circle labeled 'Process 0: Library System'. Show three external entities (rectangles): 'Librarian', 'Member', and 'Admin', connected to the central circle by labeled directional arrows representing data flows: 'Book Request', 'Overdue Report', 'Fine Payment', 'Membership Info'. Use clean vector lines and blue color accents."