data.js

const CURRICULUM = {

  courses: {

    "BCS ZC313": {
      title: "Introduction to Programming",
      units: 4,
      type: "core",
      description: "Data representation and problem-solving in C. How to design and build programs.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 1
    },

    "BCS ZC219": {
      title: "Discrete Mathematics",
      units: 3,
      type: "foundation",
      description: "Sets, relations, functions, proofs, combinatorics, recurrences, algebraic structures, and graphs.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 1
    },

    "BCS ZC230": {
      title: "Linear Algebra and Optimization",
      units: 3,
      type: "foundation",
      description: "Vector and matrix algebra. Eigenvalues, diagonalization. Linear programming and the Simplex method.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 1
    },

    "BCS ZC228": {
      title: "Introduction to Computing Systems",
      units: 3,
      type: "core",
      description: "How computers work: bits, logic gates, circuits, processor design, and assembly programming.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 1
    },

    "BCS ZC111": {
      title: "Basic Electronics",
      units: 2,
      type: "foundation",
      description: "Circuit analysis, diodes, transistors, and operational amplifiers.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 1
    },

    "BCS ZC151": {
      title: "Writing Practice",
      units: 3,
      type: "foundation",
      description: "Academic writing: paragraphs, essays, reports, summarizing, and paraphrasing.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 1
    },

    "BCS ZC311": {
      title: "Data Structures and Algorithms",
      units: 4,
      type: "core",
      description: "Data structures (stacks, queues, trees, hash tables) and algorithms (sorting, graphs).",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 2
    },

    "BCS ZC316": {
      title: "Object Oriented Programming",
      units: 4,
      type: "core",
      description: "Classes, inheritance, polymorphism, design patterns, and multithreaded programming in an OO language.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 2
    },

    "BCS ZC215": {
      title: "Command Line Interfaces and Scripting",
      units: 3,
      type: "core",
      description: "File systems, shell scripting, pipes, filters, and system calls.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 2
    },

    "BCS ZC233": {
      title: "Probability and Statistics",
      units: 3,
      type: "foundation",
      description: "Probability, random variables, distributions, hypothesis testing, and regression.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 2
    },

    "BCS ZC112": {
      title: "Introduction to Logic",
      units: 2,
      type: "foundation",
      description: "Propositional and predicate logic. Proof techniques, undecidability, and incompleteness.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 2
    },

    "BCS ZC212": {
      title: "Algorithm Design",
      units: 3,
      type: "core",
      description: "Divide-and-conquer, greedy, dynamic programming, and backtracking. Complexity classes P and NP.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 3
    },

    "BCS ZC317": {
      title: "Relational Databases",
      units: 4,
      type: "core",
      description: "Relational databases, SQL, normalization, indexing, transactions, and query optimization.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 3
    },

    "BCS ZC238": {
      title: "Web Programming",
      units: 3,
      type: "core",
      description: "HTML, CSS, JavaScript, client- and server-side scripting, and full-stack web apps.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 3
    },

    "BCS ZC236": {
      title: "Software Design Principles",
      units: 4,
      type: "core",
      description: "OO design, refactoring, design patterns, and architecture styles (layered, event-driven, MVC).",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 3
    },

    "BCS ZC216": {
      title: "Computer Systems and Performance",
      units: 3,
      type: "core",
      description: "Processor architecture, memory hierarchy, caching, paging, and disk/SSD performance.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 3
    },

    "BCS ZC232": {
      title: "Operating Systems",
      units: 3,
      type: "core",
      description: "Processes, threads, scheduling, memory management, file systems, and I/O.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 4
    },

    "BCS ZC214": {
      title: "Building Database Applications",
      units: 3,
      type: "core",
      description: "Build database-backed apps with SQL, PL/SQL, APIs, and front-end frameworks. Ends with a project.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 4
    },

    "BCS ZC234": {
      title: "Programming for Mobile Devices",
      units: 3,
      type: "core",
      description: "Mobile app development: platforms, lifecycle, human factors, and emerging interfaces.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 4
    },

    "BCS ZC220": {
      title: "Environmental Studies",
      units: 3,
      type: "foundation",
      description: "Natural resources, ecosystems, pollution, biodiversity, and environmental impact assessment.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 4
    },

    "BCS ZC222": {
      title: "Formal Languages and Applications",
      units: 3,
      type: "core",
      description: "Regular expressions, context-free grammars, and parsing (LL, LR). How compilers read code.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 4
    },

    "BCS ZC211": {
      title: "Software Development Practices",
      units: 3,
      type: "core",
      description: "Use-case design, IDEs, debugging, testing, code review, versioning, and CI/CD.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 5
    },

    "BCS ZC231": {
      title: "Network Programming and Client-Server Programming",
      units: 3,
      type: "core",
      description: "Sockets, client-server design, RPCs, network file systems, and distributed systems.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 5
    },

    "BCS ZC241T": {
      title: "Study Project",
      units: 5,
      type: "project",
      description: "Study a problem that needs a software solution. Write a project proposal.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 5
    },

    "BCS ZC428T": {
      title: "Project",
      units: 10,
      type: "project",
      description: "Build the software solution proposed in Study Project. Demo and final report.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: 6
    },

    "BCS ZC223": {
      title: "General Biology",
      units: 3,
      type: "science_elective",
      description: "Living systems, biological compounds, genetics, evolution, and ecology.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BSC ZC240": {
      title: "General Physics",
      units: 3,
      type: "science_elective",
      description: "Mechanics, thermodynamics, electromagnetism, optics, and modern physics.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC113": {
      title: "Online Social Media",
      units: 2,
      type: "humanities_elective",
      description: "Online communities, social structures, AI's role in social media, privacy, and safety.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC114": {
      title: "Video Games – Technology and Social Impacts",
      units: 2,
      type: "humanities_elective",
      description: "Game design, narrative, immersion, ethics, and genres from e-sports to serious games.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC229": {
      title: "Introduction to Economics",
      units: 3,
      type: "social_science_elective",
      description: "Scarcity, markets, firms, labour, banking, growth, inflation, and monetary/fiscal policy.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC235": {
      title: "Science, Technology and Modernity",
      units: 3,
      type: "social_science_elective",
      description: "How science and technology shape society. Ethics, history, and the role of technical professionals.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC224": {
      title: "Graphs and Networks",
      units: 3,
      type: "elective",
      description: "Graphs, digraphs, connectivity, Euler/Hamiltonian cycles, planarity, and network models.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC213": {
      title: "Automata and Computability",
      units: 3,
      type: "elective",
      description: "Finite automata, pushdown automata, Turing machines, and non-computable functions.",
      prereqs: ["BCS ZC222"],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC221": {
      title: "Experimental Algorithmics",
      units: 3,
      type: "elective",
      description: "Measure real algorithm performance: sorting, hash tables, B-trees, Bloom filters. Compare theory vs. reality.",
      prereqs: ["BCS ZC311", "BCS ZC212"],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC227": {
      title: "Introduction to Bioinformatics",
      units: 3,
      type: "elective",
      description: "Course description has not yet been officially released.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC217": {
      title: "Data Visualization",
      units: 3,
      type: "elective",
      description: "Visual encoding for data comprehension. Charts, graphs, animations, and high-dimensional data.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC312": {
      title: "Introduction to Data Analytics",
      units: 4,
      type: "elective",
      description: "Data cleaning, visualization, regression, classification, and clustering in Python.",
      prereqs: ["BCS ZC230", "BCS ZC233", "BCS ZC313"],
      specialization: null,
      specializationHint: "Counts toward AIML specialization.",
      semesterFixed: null
    },

    "BCS ZC315": {
      title: "Multi-Core Programming and GPGPU Programming",
      units: 4,
      type: "elective",
      description: "Multithreading, locks, shared-memory data structures, and CUDA/GPGPU programming.",
      prereqs: ["BCS ZC216"],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC237": {
      title: "TCP/IP and the Internet",
      units: 3,
      type: "elective",
      description: "TCP/IP stack: HTTP, DNS, TCP/UDP, routing, and IP addressing.",
      prereqs: ["BCS ZC231"],
      specialization: null,
      specializationHint: "Counts toward Cloud specialization.",
      semesterFixed: null
    },

    "BCS ZC226": {
      title: "Information Security",
      units: 3,
      type: "elective",
      description: "Program, web, database, and cloud security. Privacy, ethics, and secure system design.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC225": {
      title: "Human Computer Interaction",
      units: 3,
      type: "elective",
      description: "Usability, task analysis, prototyping, UI design (windows, menus), and multimodal I/O.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC218": {
      title: "Designing Multimodal Interfaces",
      units: 3,
      type: "elective",
      description: "Multimodal UIs, authentication (CAPTCHAs, biometrics), smart assistants, and chatbot design.",
      prereqs: ["BCS ZC316"],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC314": {
      title: "Modern Databases",
      units: 4,
      type: "elective",
      description: "NoSQL databases: document, key-value, column, and graph stores. ACID vs. BASE, CAP theorem.",
      prereqs: ["BCS ZC214"],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BCS ZC242T": {
      title: "Project",
      units: 5,
      type: "project",
      description: "Identify a problem, design and implement a software solution. Demo and report.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC421": {
      title: "Introduction to Machine Learning",
      units: 4,
      type: "discipline_elective",
      description: "Supervised, unsupervised, and reinforcement learning. Regression, trees, SVMs, neural nets. scikit-learn.",
      prereqs: ["BCS ZC312"],
      specialization: "AIML",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC412": {
      title: "Artificial Intelligence",
      units: 3,
      type: "discipline_elective",
      description: "Search, heuristics, constraint satisfaction, knowledge representation, planning, and Bayesian networks.",
      prereqs: ["BHCS ZC421"],
      specialization: "AIML",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC417": {
      title: "Deep Learning and Applications",
      units: 4,
      type: "discipline_elective",
      description: "Feedforward nets, CNNs, RNNs, attention/transformers, transfer learning. PyTorch or TensorFlow.",
      prereqs: ["BCS ZC312"],
      specialization: "AIML",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC434": {
      title: "Topics in Data Mining",
      units: 4,
      type: "discipline_elective",
      description: "Pattern discovery in large datasets: association rules, classification, clustering, anomaly detection.",
      prereqs: ["BCS ZC312"],
      specialization: "AIML",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC414": {
      title: "Cloud Computing Fundamentals",
      units: 3,
      type: "discipline_elective",
      description: "IaaS/PaaS/SaaS, virtualization, containers, AWS/GCP/Azure, auto-scaling, and cloud security.",
      prereqs: ["BCS ZC237"],
      specialization: "Cloud",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC422": {
      title: "Introduction to Networking for Cloud",
      units: 3,
      type: "discipline_elective",
      description: "VPCs, load balancing, DNS, CDNs, VPNs, and cloud network security.",
      prereqs: ["BHCS ZC414"],
      specialization: "Cloud",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC420": {
      title: "Introduction to DevOps for Cloud",
      units: 4,
      type: "discipline_elective",
      description: "CI/CD, infrastructure as code (Terraform), Docker, Kubernetes, and monitoring.",
      prereqs: ["BHCS ZC414"],
      specialization: "Cloud",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC430": {
      title: "Scalable Services in Cloud",
      units: 4,
      type: "discipline_elective",
      description: "Microservices, API gateways, event-driven architectures, caching, and serverless.",
      prereqs: ["BHCS ZC414"],
      specialization: "Cloud",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC413": {
      title: "Backend and API Development",
      units: 4,
      type: "discipline_elective",
      description: "REST APIs, auth (JWT, OAuth), middleware, GraphQL, rate limiting, and backend testing.",
      prereqs: [],
      specialization: "FullStack",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC419": {
      title: "Frontend Development",
      units: 3,
      type: "discipline_elective",
      description: "Component-based UIs, state management, responsive design, and frontend performance.",
      prereqs: ["BHCS ZC413"],
      specialization: "FullStack",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC415": {
      title: "Cross-Platform Applications",
      units: 3,
      type: "discipline_elective",
      description: "Shared codebases for mobile and desktop. Platform APIs, packaging, distribution, and updates.",
      prereqs: ["BHCS ZC419"],
      specialization: "FullStack",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC432": {
      title: "Software Deployment",
      units: 4,
      type: "discipline_elective",
      description: "Deployment environments, release engineering, zero-downtime deploys, rollback, and secrets management.",
      prereqs: ["BHCS ZC419"],
      specialization: "FullStack",
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC433": {
      title: "Topics in Algorithms and Complexity",
      units: 4,
      type: "discipline_elective",
      description: "Approximation, randomized, online, and parameterized algorithms. Complexity beyond P and NP.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC324": {
      title: "Compiler Design",
      units: 4,
      type: "discipline_elective",
      description: "Lexical analysis, parsing (LL, LR), type checking, code generation, and optimization.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZG512": {
      title: "Network Security",
      units: 4,
      type: "discipline_elective",
      description: "Network attacks, TLS/IPSec, firewalls, IDS/IPS, DoS mitigation, and forensics.",
      prereqs: ["BCS ZC237"],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC321": {
      title: "Software Testing and Automation",
      units: 3,
      type: "discipline_elective",
      description: "Unit, integration, and system testing. TDD, mutation testing, and automated test frameworks.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC418": {
      title: "Distributed Systems",
      units: 4,
      type: "discipline_elective",
      description: "Consistency models, CAP theorem, consensus (Paxos, Raft), replication, and fault tolerance.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC319": {
      title: "Natural Language Processing",
      units: 3,
      type: "discipline_elective",
      description: "Text preprocessing, language models, tagging, NER, sentiment analysis, and machine translation.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC423": {
      title: "Introduction to Social Media Analytics",
      units: 4,
      type: "discipline_elective",
      description: "Social media data collection, network analysis, sentiment mining, bot detection, and misinformation.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC416": {
      title: "Cryptography",
      units: 3,
      type: "discipline_elective",
      description: "Symmetric/asymmetric encryption, hash functions, digital signatures, key exchange, and PKI.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZG511": {
      title: "Agile Software Processes",
      units: 3,
      type: "discipline_elective",
      description: "Scrum, Kanban, user stories, estimation, agile testing, and scaling (SAFe, LeSS).",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC429": {
      title: "Open Source Software",
      units: 4,
      type: "discipline_elective",
      description: "Open source licensing, contributing (PRs, code review), governance, packaging, and supply-chain security.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC427T": {
      title: "Mini Project",
      units: 5,
      type: "project",
      description: "A focused project in your chosen specialization. Build a solution, write a report, demo it.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC327": {
      title: "Introduction to Calculus",
      units: 3,
      type: "open_elective",
      description: "Limits, derivatives, integrals, and the Fundamental Theorem of Calculus.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC325": {
      title: "Differential Equations and Applications",
      units: 3,
      type: "open_elective",
      description: "ODEs (separable, linear, exact), Laplace transforms, systems of ODEs, and numerical methods.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC320": {
      title: "Numerical Analysis",
      units: 3,
      type: "open_elective",
      description: "Root-finding, interpolation, numerical integration, linear systems, and ODE solvers.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC241": {
      title: "Microprocessors, Programming and Interfacing",
      units: 4,
      type: "open_elective",
      description: "Microprocessor architecture, assembly programming, interrupts, memory/I/O interfacing.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC328": {
      title: "Introduction to IoT",
      units: 4,
      type: "open_elective",
      description: "IoT architecture, sensors, embedded programming, protocols (MQTT, BLE), edge computing, and security.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC244": {
      title: "Accounting for Managers",
      units: 3,
      type: "open_elective",
      description: "Financial statements, cost concepts, budgeting, ratio analysis, and auditing basics.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC322": {
      title: "Corporate Finance",
      units: 3,
      type: "open_elective",
      description: "Time value of money, capital budgeting (NPV, IRR), capital structure, and dividend policy.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC323": {
      title: "Investment Management",
      units: 3,
      type: "open_elective",
      description: "Portfolio theory, CAPM, equity/bond valuation, derivatives, and behavioural finance.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    },

    "BHCS ZC243": {
      title: "Signals and Systems",
      units: 3,
      type: "open_elective",
      description: "Signals, LTI systems, Fourier/Laplace/z-transforms, sampling, and digital filters.",
      prereqs: [],
      specialization: null,
      specializationHint: null,
      semesterFixed: null
    }

  },

  semesters: {
    1: {
      label: "Semester I",
      units: 18,
      fixed: ["BCS ZC313", "BCS ZC219", "BCS ZC230", "BCS ZC228", "BCS ZC111", "BCS ZC151"],
      optionals: [],
      electives: []
    },

    2: {
      label: "Semester II",
      units: 19,
      fixed: ["BCS ZC311", "BCS ZC316", "BCS ZC215", "BCS ZC233", "BCS ZC112"],
      optionals: [
        {
          slotKey: "SCIENCE_ELECTIVE",
          label: "Science Elective",
          choices: ["BCS ZC223", "BSC ZC240"]
        }
      ],
      electives: []
    },

    3: {
      label: "Semester III",
      units: 19,
      fixed: ["BCS ZC212", "BCS ZC317", "BCS ZC238", "BCS ZC236", "BCS ZC216"],
      optionals: [
        {
          slotKey: "HUMANITIES_ELECTIVE",
          label: "Humanities Elective",
          choices: ["BCS ZC113", "BCS ZC114"]
        }
      ],
      electives: []
    },

    4: {
      label: "Semester IV",
      units: 18,
      fixed: ["BCS ZC232", "BCS ZC214", "BCS ZC234", "BCS ZC220", "BCS ZC222"],
      optionals: [],
      electives: [
        { slotKey: "DISCIPLINE_ELECTIVE_1", label: "Discipline Elective #1" }
      ]
    },

    5: {
      label: "Semester V",
      units: 17,
      fixed: ["BCS ZC211", "BCS ZC231", "BCS ZC241T"],
      optionals: [],
      electives: [
        { slotKey: "DISCIPLINE_ELECTIVE_2", label: "Discipline Elective #2" },
        { slotKey: "DISCIPLINE_ELECTIVE_3", label: "Discipline Elective #3" }
      ]
    },

    6: {
      label: "Semester VI",
      units: 16,
      fixed: ["BCS ZC428T"],
      optionals: [
        {
          slotKey: "SOCIAL_SCIENCE_ELECTIVE",
          label: "Social Science Elective",
          choices: ["BCS ZC229", "BCS ZC235"]
        }
      ],
      electives: [
        { slotKey: "DISCIPLINE_ELECTIVE_4", label: "Discipline Elective #4" }
      ],
      hasFork: true
    },

    7: {
      label: "Semester VII",
      units: 17,
      bschOnly: true,
      fixed: [],
      optionals: [],
      electives: [
        { slotKey: "DISC_ELECTIVE_SEM7_1",   label: "Discipline Elective" },
        { slotKey: "DISC_ELECTIVE_SEM7_2",   label: "Discipline Elective" },
        { slotKey: "OPEN_ELECTIVE_SEM7_1",   label: "Open Elective" },
        { slotKey: "OPEN_ELECTIVE_SEM7_2",   label: "Open Elective" },
        { slotKey: "DISC_OR_OPEN_SEM7",      label: "Discipline or Open Elective" },
        { slotKey: "DISC_ELECTIVE_SEM7_OPT", label: "Discipline Elective (optional)", optional: true }
      ]
    },

    8: {
      label: "Semester VIII",
      units: 17,
      bschOnly: true,
      fixed: [],
      optionals: [],
      electives: [
        { slotKey: "DISC_ELECTIVE_SEM8_1",   label: "Discipline Elective" },
        { slotKey: "DISC_ELECTIVE_SEM8_2",   label: "Discipline Elective" },
        { slotKey: "DISC_OR_MINI_SEM8",      label: "Discipline Elective or Mini Project" },
        { slotKey: "OPEN_OR_DISC_SEM8_1",    label: "Open or Discipline Elective" },
        { slotKey: "OPEN_OR_DISC_SEM8_2",    label: "Open or Discipline Elective" },
        { slotKey: "DISC_ELECTIVE_SEM8_OPT", label: "Discipline Elective (optional)", optional: true }
      ]
    }
  },

  bscElectives: [
    "BCS ZC224", "BCS ZC213", "BCS ZC221", "BCS ZC227",
    "BCS ZC217", "BCS ZC312", "BCS ZC315", "BCS ZC237",
    "BCS ZC226", "BCS ZC225", "BCS ZC218", "BCS ZC314"
  ],

  disciplineElectives: [
    "BHCS ZC421", "BHCS ZC412", "BHCS ZC417", "BHCS ZC434",
    "BHCS ZC414", "BHCS ZC422", "BHCS ZC420", "BHCS ZC430",
    "BHCS ZC413", "BHCS ZC419", "BHCS ZC415", "BHCS ZC432",
    "BHCS ZC433", "BHCS ZC324", "BHCS ZG512", "BHCS ZC321",
    "BHCS ZC418", "BHCS ZC319", "BHCS ZC423", "BHCS ZC416",
    "BHCS ZG511", "BHCS ZC429", "BHCS ZC427T"
  ],

  openElectives: [
    "BHCS ZC327", "BHCS ZC325", "BHCS ZC320", "BHCS ZC241",
    "BHCS ZC328", "BHCS ZC244", "BHCS ZC322", "BHCS ZC323", "BHCS ZC243"
  ],

  specializations: {
    "AIML": {
      label: "Artificial Intelligence & Machine Learning",
      prereqCourses: ["BCS ZC312"],
      mandatoryCourses: ["BHCS ZC421", "BHCS ZC412", "BHCS ZC417", "BHCS ZC434"],
      miniProject: "BHCS ZC427T",
      description: "Machine learning, deep learning, data mining, and AI."
    },
    "Cloud": {
      label: "Cloud Computing",
      prereqCourses: ["BCS ZC237"],
      mandatoryCourses: ["BHCS ZC414", "BHCS ZC422", "BHCS ZC420", "BHCS ZC430"],
      miniProject: "BHCS ZC427T",
      description: "Cloud infrastructure, DevOps, networking, and scalable services."
    },
    "FullStack": {
      label: "Full-Stack Development",
      prereqCourses: [],
      mandatoryCourses: ["BHCS ZC413", "BHCS ZC419", "BHCS ZC415", "BHCS ZC432"],
      miniProject: "BHCS ZC427T",
      description: "Backend APIs, frontend, cross-platform apps, and deployment."
    }
  },

  implicitPrereqs: {
    "BCS ZC428T": ["BCS ZC241T"]
  }

};

function validateCurriculum() {
  const knownCodes = new Set(Object.keys(CURRICULUM.courses));
  const issues = [];

  function checkCode(code, context) {
    if (!knownCodes.has(code)) {
      issues.push(`Unknown course code "${code}" referenced in: ${context}`);
    }
  }

  for (const [semNum, semDef] of Object.entries(CURRICULUM.semesters)) {
    const ctx = `semesters[${semNum}]`;
    for (const code of semDef.fixed) {
      checkCode(code, `${ctx}.fixed`);
    }
    for (const optional of semDef.optionals) {
      for (const code of optional.choices) {
        checkCode(code, `${ctx}.optionals["${optional.slotKey}"].choices`);
      }
    }
  }

  for (const [code, courseDef] of Object.entries(CURRICULUM.courses)) {
    for (const prereqCode of courseDef.prereqs) {
      checkCode(prereqCode, `courses["${code}"].prereqs`);
    }
  }

  for (const [code, prereqList] of Object.entries(CURRICULUM.implicitPrereqs)) {
    checkCode(code, `implicitPrereqs (key)`);
    for (const prereqCode of prereqList) {
      checkCode(prereqCode, `implicitPrereqs["${code}"]`);
    }
  }

  for (const code of CURRICULUM.bscElectives) {
    checkCode(code, `bscElectives`);
  }
  for (const code of CURRICULUM.disciplineElectives) {
    checkCode(code, `disciplineElectives`);
  }
  for (const code of CURRICULUM.openElectives) {
    checkCode(code, `openElectives`);
  }

  for (const [specKey, specDef] of Object.entries(CURRICULUM.specializations)) {
    for (const code of specDef.prereqCourses) {
      checkCode(code, `specializations["${specKey}"].prereqCourses`);
    }
    for (const code of specDef.mandatoryCourses) {
      checkCode(code, `specializations["${specKey}"].mandatoryCourses`);
    }
    checkCode(specDef.miniProject, `specializations["${specKey}"].miniProject`);
  }

  if (issues.length > 0) {
    for (const issue of issues) {
      console.warn(`[CURRICULUM VALIDATION] ${issue}`);
    }
  }
}

validateCurriculum();