Flashcard management system organized into different subjects or sectors. Spaced repetition system with a 5-level difficulty progression. Automated scheduling for the next review based on performance. HUD displays total data nodes, pending reviews, and system uptime. Study mode with flip-card mechanics and performance rating (Accept/Reject). Cyberpunk-themed interface with terminal fonts and static noise overlays. Progress bars and mastery percentages for each card deck. Customizable deck icons and color-coding for organizations. Swipe-to-delete functionality for removing sectors. Local data storage for all flashcards and deck settings.