demo-loader.js

/**
 * THE CIPHER MUSEUM — Demo Loader
 * Auto-generates interactive "Try It Yourself" demos for all cipher exhibit pages.
 * Place <div class="demo-section" data-cipher="cipherName"></div> in the HTML.
 */
'use strict';

(function () {
  const CONFIGS = {
    rasterschluessel44: { label:'RS44 (27 March 1944; max 200 prepared letters)', engine:'rasterschluessel44', defaultMsg:'FEINDGREIFTSEITELFXVIERFUENFUHRBEIAAIGQALFISIGQALFISEEMITAQTPANZNAQSUEDWESTAN', inputs:[{type:'text',id:'keyword',label:'Key: manual, or JSON settings (short teaching mode)',value:'manual'}] },
    doublePlayfair: { label:'German Double Playfair (December 1941; J→II; odd filler Z)', engine:'doublePlayfair', defaultMsg:'FEINDLIQERANGRIFFAUFSTRASZEADORFSTRIQBEHAUSENABGEWEHRT', inputs:[{type:'text',id:'keyword',label:'Key: manual, or JSON squares/filler/strict',value:'manual'}] },
    amsco: { label:'AMSCO (ACA digraph-first)', engine:'amsco', defaultMsg:'INCOMPLETECOLUMNARWITHALTERNATINGSINGLELETTERSANDDIGRAPHS', inputs:[{type:'text',id:'keyword',label:'Column ranks (or JSON order/first)',value:'41325'}] },
    caesar: {
      label: 'Caesar Cipher', engine: 'caesar', defaultMsg: 'THE QUICK BROWN FOX',
      inputs: [{ type: 'range', id: 'shift', label: 'Shift', min: 1, max: 25, value: 3 }]
    },
    monoalphabetic: {
      label: 'Monoalphabetic Substitution', engine: 'monoalphabetic', defaultMsg: 'ATTACK AT DAWN',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'ZEBRA', placeholder: 'Keyword…' }]
    },
    polybius: {
      label: 'Polybius Square', engine: 'polybius', defaultMsg: 'HELLO WORLD',
      inputs: []
    },
    homophonic: {
      label: 'Homophonic Substitution', engine: 'homophonic', defaultMsg: 'SECRET MESSAGE',
      inputs: [{ type: 'text', id: 'keyword', label: 'Seed Keyword', value: 'CIPHER', placeholder: 'Seed…' }]
    },
    playfair: {
      label: 'Playfair Cipher', engine: 'playfair', defaultMsg: 'HIDE THE GOLD',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'MONARCHY', placeholder: 'Keyword…' }]
    },
    hill: {
      label: 'Hill Cipher', engine: 'hill', defaultMsg: 'SHORT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Key Matrix (a,b,c,d)', value: '3,3,2,5', placeholder: '3,3,2,5' }]
    },
    vigenere: {
      label: 'Vigenère Cipher', engine: 'vigenere', defaultMsg: 'ATTACKATDAWN',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'LEMON', placeholder: 'Keyword…' }]
    },
    beaufort: {
      label: 'Beaufort Cipher', engine: 'beaufort', defaultMsg: 'THE QUICK BROWN FOX',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'FORTIFICATION', placeholder: 'Keyword…' }]
    },
    gronsfeld: {
      label: 'Gronsfeld Cipher', engine: 'gronsfeld', defaultMsg: 'THE SECRET CODE',
      inputs: [{ type: 'text', id: 'keyword', label: 'Numeric Key', value: '31415', placeholder: 'Digits…' }]
    },
    porta: {
      label: 'Porta Cipher', engine: 'porta', defaultMsg: 'DEFEND THE EAST WALL',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'FORTIFY', placeholder: 'Keyword…' }]
    },
    runningKey: {
      label: 'Running Key Cipher', engine: 'runningKey', defaultMsg: 'FLEE AT ONCE',
      inputs: [{ type: 'textarea', id: 'keyword', label: 'Key Text', value: 'WE HOLD THESE TRUTHS TO BE SELF EVIDENT', placeholder: 'Long key text…' }]
    },
    railFence: {
      label: 'Rail Fence Cipher', engine: 'railFence', defaultMsg: 'WE ARE DISCOVERED FLEE AT ONCE',
      inputs: [{ type: 'range', id: 'shift', label: 'Rails', min: 2, max: 10, value: 3 }]
    },
    columnar: {
      label: 'Columnar Transposition', engine: 'columnar', defaultMsg: 'THE TOMATO IS A PLANT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'ZEBRA', placeholder: 'Keyword…' }]
    },
    doubleTransposition: {
      label: 'Double Transposition', engine: 'doubleTransposition', defaultMsg: 'ATTACK AT DAWN',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keywords (key1,key2)', value: 'FIRST,SECOND', placeholder: 'KEY1,KEY2' }]
    },
    bacon: {
      label: "Bacon's Cipher", engine: 'bacon', defaultMsg: 'HELLO',
      inputs: []
    },
    tapCode: {
      label: 'Tap Code', engine: 'tapCode', defaultMsg: 'HELLO',
      inputs: []
    },
    pigpen: {
      label: 'Pigpen Cipher', engine: 'pigpen', defaultMsg: 'FREEMASON',
      inputs: []
    },
    bifid: {
      label: 'Bifid Cipher', engine: 'bifid', defaultMsg: 'FLEEATONCE',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'SECRET', placeholder: 'Keyword…' }]
    },
    trifid: {
      label: 'Trifid Cipher', engine: 'trifid', defaultMsg: 'DEFEND',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'FELIX', placeholder: 'Keyword…' }]
    },
    adfgx: {
      label: 'ADFGX Cipher', engine: 'adfgx', defaultMsg: 'ATTACK',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keys (polybius,columnar)', value: 'PRIVACY,GERMAN', placeholder: 'KEY1,KEY2' }]
    },
    adfgvx: {
      label: 'ADFGVX Cipher', engine: 'adfgvx', defaultMsg: 'ATTACK',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keys (polybius,columnar)', value: 'PRIVACY,GERMAN', placeholder: 'KEY1,KEY2' }]
    },
    nihilist: {
      label: 'Nihilist Cipher', engine: 'nihilist', defaultMsg: 'DYNAMITE WINTER PALACE',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keys (polybius,keyword)', value: 'RUSSIAN,KEY', placeholder: 'GRID,KEY' }]
    },
    otp: {
      label: 'One-Time Pad', engine: 'otp', defaultMsg: 'ATTACK',
      inputs: [{ type: 'text', id: 'keyword', label: 'Key (leave blank for random)', value: '', placeholder: 'Random key if empty' }]
    },
    fractionatedMorse: {
      label: 'Fractionated Morse', engine: 'fractionatedMorse', defaultMsg: 'HELLO WORLD',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'ROUNDTABLE', placeholder: 'Keyword…' }]
    },
    confederateVigenere: {
      label: 'Confederate Vigenère', engine: 'confederateVigenere', defaultMsg: 'SEND REINFORCEMENTS',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'CONFEDERATE', placeholder: 'Keyword…' }]
    },
    bazeries: {
      label: 'Bazeries-inspired teaching model', engine: 'bazeries', defaultMsg: 'RETREAT TO THE HILLS',
      inputs: [{ type: 'range', id: 'shift', label: 'Number Key', min: 2, max: 99, value: 42 }]
    },
    alberti: {
      label: 'Alberti Cipher Disk', engine: 'alberti', defaultMsg: 'SECRETS OF THE VATICAN',
      inputs: [{ type: 'range', id: 'shift', label: 'Initial Disk Setting', min: 0, max: 25, value: 3 }]
    },
    jefferson: {
      label: 'Jefferson Disk', engine: 'jefferson', defaultMsg: 'WE HOLD THESE TRUTHS',
      inputs: [{ type: 'text', id: 'keyword', label: 'Disk Order (comma-separated)', value: '3,1,5,2,4,6', placeholder: '1,2,3…26' }]
    },
    enigma: {
      label: 'Enigma Machine', engine: 'enigma', defaultMsg: 'HELLO WORLD',
      inputs: [{ type: 'text', id: 'keyword', label: 'Rotor Start (3 letters)', value: 'AAA', placeholder: 'AAA' }]
    },
    lorenz: {
      label: 'Lorenz Cipher', engine: 'lorenz', defaultMsg: 'URGENT MESSAGE',
      inputs: [{ type: 'text', id: 'keyword', label: 'Wheel Seed', value: 'LORENZ', placeholder: 'Seed word…' }]
    },
    dictionaryCode: {
      label: 'Dictionary Code', engine: 'dictionaryCode', defaultMsg: 'WTUSC',
      inputs: [{ type: 'textarea', id: 'keyword', label: 'Reference Text', value: 'We the People of the United States in Order to form a more perfect Union establish Justice insure domestic Tranquility provide for the common defence', placeholder: 'Reference text…' }]
    },
    stager: {
      label: 'Letter-Route Teaching Model — Compare Stager’s Word Routes', engine: 'stager', defaultMsg: 'WE ARE DISCOVERED FLEE AT ONCE',
      inputs: [{ type: 'range', id: 'shift', label: 'Columns', min: 2, max: 10, value: 5 }]
    },
    vic: {
      label: 'VIC Cipher', engine: 'vic', defaultMsg: 'AGENT REPORT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Keyword', value: 'SNOWFALL', placeholder: 'Keyword…' }]
    },
    scytale: {
      label: 'Scytale', engine: 'scytale', defaultMsg: 'ATTACK AT DAWN',
      inputs: [{ type: 'range', id: 'shift', label: 'Rod Rows', min: 2, max: 10, value: 3 }]
    },
    vernam: {
      label: 'Vernam Cipher (XOR)', engine: 'vernam', defaultMsg: 'SECRET',
      inputs: [{ type: 'text', id: 'keyword', label: 'Key (leave blank for random)', value: '', placeholder: 'Random key if empty' }]
    },
    greatCipher: {
      label: 'Great Cipher (Grand Chiffre)', engine: 'greatCipher',
      defaultMsg: 'THE KING ORDERS RETREAT TO PARIS AT DAWN',
      inputs: [{ type: 'text', id: 'keyword', label: 'Codebook Seed', value: 'LOUIS', placeholder: 'Seed word…' }]
    },
    babington: {
      label: 'Babington Plot Cipher', engine: 'babington',
      defaultMsg: 'THE QUEEN MUST DIE FOR LIBERTY',
      inputs: [{ type: 'text', id: 'keyword', label: 'Codebook Seed', value: 'BABINGTON', placeholder: 'Seed word…' }]
    },
    'navajo-code-talkers': {
      label: 'Navajo Code Talkers', engine: 'navajo',
      defaultMsg: 'ENEMY TANK BATTLESHIP IWO JIMA',
      inputs: []
    },
    voynich: {
      label: 'Voynich exhibit — invented letter-substitution model', engine: 'voynich',
      defaultMsg: 'HE WHO DECIPHERS THIS WILL BE FAMOUS',
      inputs: []
    },
    atbash: {
      label: 'Atbash', engine: 'atbash', defaultMsg: 'HELLO WORLD',
      inputs: []
    },
    rot13: {
      label: 'ROT13', engine: 'rot13', defaultMsg: 'TRY ROTATING THIRTEEN',
      inputs: []
    },
    foursquare: {
      label: 'Four-Square Cipher', engine: 'foursquare', defaultMsg: 'HELP ME OBI WAN',
      inputs: [{ type: 'text', id: 'keyword', label: 'Two Keywords (key1,key2)', value: 'EXAMPLE,KEYWORD', placeholder: 'KEY1,KEY2' }]
    },
    twosquare: {
      label: 'Two-Square Cipher', engine: 'twosquare', defaultMsg: 'COME QUICKLY WE NEED HELP',
      inputs: [{ type: 'text', id: 'keyword', label: 'Two Keywords (key1,key2)', value: 'EXAMPLE,KEYWORD', placeholder: 'KEY1,KEY2' }]
    },
    straddlingCheckerboard: {
      label: 'Straddling Checkerboard', engine: 'straddlingCheckerboard',
      defaultMsg: 'ATTACK AT DAWN',
      inputs: [{ type: 'text', id: 'keyword', label: 'Top-Row Letters (8)', value: 'ATONESIRE', placeholder: '8 distinct letters' }]
    },
    chaocipher: {
      label: 'Chaocipher', engine: 'chaocipher', defaultMsg: 'WELLDONE IS BETTER THAN WELLSAID',
      inputs: [{ type: 'text', id: 'keyword', label: 'Initial Alphabet Key', value: 'CHAOCIPHER', placeholder: 'Seed word…' }]
    },
    m209: {
      label: 'M-209 pin-and-lug teaching model', engine: 'm209', defaultMsg: 'ENEMY ADVANCING ON FLANK',
      note: 'This deterministic teaching model derives six pin wheels and all 27 lug bars from the seed. It is not an operational M-209 key sheet.',
      inputs: [{ type: 'text', id: 'keyword', label: 'Deterministic Pin/Lug Seed', value: 'HAGELIN', placeholder: 'Seed word…' }]
    },
    solitaire: {
      label: 'Solitaire / Pontifex', engine: 'solitaire', defaultMsg: 'DO NOT USE PC',
      inputs: [{ type: 'text', id: 'keyword', label: 'Deck Key', value: 'CRYPTONOMICON', placeholder: 'Key word…' }]
    },
    beale: {
      label: 'Beale Cipher (book cipher)', engine: 'beale', defaultMsg: 'GOLD',
      inputs: [{ type: 'textarea', id: 'keyword', label: 'Reference Text (Declaration of Independence excerpt)',
        value: 'When in the course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another and to assume among the powers of the earth the separate and equal station to which the laws of nature and of natures god entitle them a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation',
        placeholder: 'Long reference text…' }]
    },
    copiale: {
      label: 'Copiale Cipher', engine: 'copiale', defaultMsg: 'OCULIST ORDER SECRETS',
      inputs: [{ type: 'text', id: 'keyword', label: 'Symbol Seed', value: 'COPIALE', placeholder: 'Seed word…' }]
    },
    kryptos: {
      label: 'Kryptos K1/K2 Tableau', engine: 'kryptos', defaultMsg: 'BETWEEN SUBTLE SHADING AND THE ABSENCE OF LIGHT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Vigenère Key', value: 'PALIMPSEST', placeholder: 'PALIMPSEST or ABSCISSA' }]
    },
    purple: {
      label: 'Purple (simplified)', engine: 'purple', defaultMsg: 'CLIMB MOUNT NIITAKA',
      inputs: [{ type: 'text', id: 'keyword', label: 'Switch Seed', value: 'PURPLE', placeholder: 'Seed word…' }]
    },
    autokey: {
      label: 'Autokey Cipher (Vigenère self-extending)', engine: 'autokey', defaultMsg: 'ATTACK AT DAWN',
      inputs: [{ type: 'text', id: 'keyword', label: 'Primer Key', value: 'QUEENLY', placeholder: 'Primer word…' }]
    },
    nomenclator: {
      label: 'Nomenclator (codebook + cipher alphabet)', engine: 'nomenclator',
      defaultMsg: 'THE KING WILL ATTACK PARIS AT DAWN',
      inputs: []
    },
    bookCipher: {
      label: 'Book Cipher (Declaration of Independence)', engine: 'bookCipher',
      defaultMsg: 'GOLD',
      inputs: []
    },
    sigaba: {
      label: 'SIGABA (pseudorandom rotor stepping)', engine: 'sigaba', defaultMsg: 'CLIMB MOUNT NIITAKA',
      inputs: [{ type: 'text', id: 'keyword', label: 'Rotor Seed', value: 'SIGABA', placeholder: 'Seed word…' }]
    },
    typex: {
      label: 'Typex (5-rotor Enigma-style)', engine: 'typex', defaultMsg: 'BRITISH SIGNAL READY',
      inputs: [{ type: 'text', id: 'keyword', label: 'Rotor Start (5 letters)', value: 'AAAAA', placeholder: 'AAAAA' }]
    },
    'kama-sutra': {
      label: 'Kama Sutra Cipher (Mlecchita Vikalpa)', engine: 'kamaSutra',
      defaultMsg: 'SECRET LOVERS LANGUAGE',
      inputs: [{ type: 'text', id: 'keyword', label: 'Pairing Seed', value: 'KAMASUTRA', placeholder: 'Seed word…' }]
    },
    'aeneas-tacticus': {
      label: 'Aeneas Tacticus Water-Clock Code', engine: 'aeneasTacticus',
      defaultMsg: 'SHIPS APPROACH AT NIGHT',
      inputs: []
    },
    'arabic-nomenclators': {
      label: 'Arabic Nomenclator (al-Kindi era)', engine: 'nomenclator',
      defaultMsg: 'THE CALIPH RIDES AT DAWN',
      inputs: []
    },
    'jn-25': {
      label: 'JN-25 (illustrative superenciphered codebook)', engine: 'jn25',
      defaultMsg: 'AF SHORT OF WATER',
      inputs: [{ type: 'text', id: 'keyword', label: 'Additive Key Digits', value: '31415', placeholder: 'Digits only…' }]
    },
    'red-type-a': {
      label: 'Red (Type A) stepping-switch model', engine: 'redTypeA',
      defaultMsg: 'DIPLOMATIC TRAFFIC TOKYO',
      inputs: [{ type: 'text', id: 'keyword', label: 'Switch Seed', value: 'TOKYORED', placeholder: 'Seed word…' }]
    },
    'affine': {
      label: 'Affine Cipher  (E(x) = a·x + b mod 26)', engine: 'affine',
      defaultMsg: 'AFFINE CIPHER',
      inputs: [{ type: 'text', id: 'keyword', label: 'Key (a,b) — a coprime to 26', value: '5,8', placeholder: '5,8' }]
    },
    'trithemius': {
      label: 'Trithemius Progressive Cipher (1518)', engine: 'trithemius',
      defaultMsg: 'STEGANOGRAPHIA',
      inputs: [{ type: 'number', id: 'shift', label: 'Starting Shift', value: '0', placeholder: '0' }]
    },
    'cardano-autokey': {
      label: 'Plaintext Autokey — Modern Comparison Model', engine: 'cardanoAutokey',
      defaultMsg: 'MEET ME AT MIDNIGHT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Single Seed Letter', value: 'Q', placeholder: 'Q' }]
    },
    'wheatstone': {
      label: 'Equal-Dial Substitution Model — Not Historical Wheatstone', engine: 'wheatstone',
      defaultMsg: 'TELEGRAPH SIGNAL',
      inputs: [{ type: 'text', id: 'keyword', label: 'Inner-Dial Keyword', value: 'WHEATSTONE', placeholder: 'Keyword…' }]
    },
    'morse': {
      label: 'International Morse Code', engine: 'morse',
      defaultMsg: 'SOS',
      inputs: []
    },
    'cardano-grille': {
      label: 'Cardano Grille (1550)', engine: 'cardanoGrille',
      defaultMsg: 'MEETME',
      inputs: [{ type: 'text', id: 'keyword', label: 'Pattern (size:idx,idx,…)', value: '5:0,3,7,12,19,21,24', placeholder: 'e.g. 5:0,3,7,12,19' }]
    },
    'null-cipher': {
      label: 'Null Cipher (Hidden-Letter Concealment)', engine: 'nullCipher',
      defaultMsg: 'HELP',
      inputs: [{ type: 'text', id: 'keyword', label: 'Position (first | last | N)', value: 'first', placeholder: 'first' }]
    },
    'fialka': {
      label: 'Fialka M-125 (Soviet 10-rotor model)', engine: 'fialka',
      note: 'Illustrative seeded 26-letter rotor model only. It does not reproduce the M-125 30-contact alphabet, real rotor wiring, stepping, or key-card settings.',
      defaultMsg: 'WARSAW PACT TRAFFIC',
      inputs: [{ type: 'text', id: 'keyword', label: 'Rotor Seed', value: 'M125', placeholder: 'Seed word…' }]
    },
    'kl-7': {
      label: 'KL-7 (US 1952 8-rotor model)', engine: 'kl7',
      note: 'Illustrative seeded 26-letter rotor model only. It does not reproduce ADONIS rotor wiring, notch rings, stepping, or re-entry wiring.',
      defaultMsg: 'NATO READY MESSAGE',
      inputs: [{ type: 'text', id: 'keyword', label: 'Rotor Seed', value: 'TSEC', placeholder: 'Seed word…' }]
    },
    'geheimschreiber': {
      label: 'Geheimschreiber T52 (Sturgeon family)', engine: 'geheimschreiber',
      defaultMsg: 'OBERKOMMANDO WEHRMACHT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Wheel Seed', value: 'STURGEON', placeholder: 'Seed word…' }]
    },
    'kryha': {
      label: 'Kryha Pocket Cipher (1924)', engine: 'kryha',
      defaultMsg: 'UNBREAKABLE CIPHER',
      inputs: [{ type: 'text', id: 'keyword', label: 'Wheel Seed', value: 'POCKET', placeholder: 'Seed word…' }]
    },
    'm-94': {
      label: 'M-94 / M-138-A Strip Cipher (1922)', engine: 'm94',
      defaultMsg: 'ARMY SIGNAL READY',
      inputs: [{ type: 'text', id: 'keyword', label: 'Offset Row[, disk-order]', value: '5', placeholder: '5 or 5,1,2,3,…' }]
    },
    'chinese-telegraph': {
      label: 'Chinese Telegraph Code (1881, 4-digit codebook)', engine: 'chineseTelegraph',
      defaultMsg: 'SHANGHAI',
      inputs: [{ type: 'text', id: 'keyword', label: 'Additive Key (numeric, 0–9999)', value: '0', placeholder: 'e.g. 1234' }]
    },
    'zimmermann': {
      label: 'Codebook and Additive Teaching Model', engine: 'zimmermann',
      note: 'An invented word table with optional additive arithmetic. This does not reconstruct diplomatic codes 0075 or 13040, which were used on successive transmission legs.',
      defaultMsg: 'WAR WITH MEXICO STOP',
      inputs: [{ type: 'text', id: 'keyword', label: 'Teaching-model additive (0–99999)', value: '0', placeholder: 'e.g. 12345' }]
    },
    'slidex': {
      label: 'Slidex (British WWII tactical bigram card)', engine: 'slidex',
      defaultMsg: 'TANK MOVE NORTH',
      inputs: [{ type: 'text', id: 'keyword', label: 'Card Seed', value: 'SLIDEX', placeholder: 'Seed word…' }]
    },
    'commercial-codebooks': {
      label: 'Commercial Telegraph Codebooks (ABC / Bentley\'s style)', engine: 'commercialCode',
      defaultMsg: 'CONFIRMED SHIPMENT URGENT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Codebook (informational only)', value: 'ABC', placeholder: 'ABC, Bentley, Lieber…' }]
    },
    'culper-ring': {
      label: 'Culper Ring / Tallmadge Code (1779)', engine: 'culperRing',
      defaultMsg: 'WASHINGTON ATTACK MIDNIGHT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Codebook key (informational)', value: 'TALLMADGE', placeholder: 'TALLMADGE' }]
    },
    'arnold-andre': {
      label: 'Arnold–André Book Cipher (Blackstone\'s Commentaries)', engine: 'arnoldAndre',
      defaultMsg: 'GENERAL ARNOLD MEET ANDRE TONIGHT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Book seed (informational)', value: 'BLACKSTONE', placeholder: 'BLACKSTONE' }]
    },
    'argenti': {
      label: 'Argenti Family Cipher (Vatican, 1500s–1600s)', engine: 'argenti',
      defaultMsg: 'ATTACK AT DAWN',
      inputs: [{ type: 'text', id: 'keyword', label: 'Homophone Key', value: 'ARGENTI', placeholder: 'ARGENTI' }]
    },
    'wallis-ciphers': {
      label: 'Wallis Ciphers (English Civil War, 1640s)', engine: 'wallisCiphers',
      defaultMsg: 'KING CHARLES MARCH OXFORD',
      inputs: [{ type: 'text', id: 'keyword', label: 'Nomenclator Key', value: 'WALLIS', placeholder: 'WALLIS' }]
    },
    'raf-otp': {
      label: 'Letter-Pad Teaching Model — Not an Authenticated RAF System', engine: 'otp',
      defaultMsg: 'OPERATION READY', inputs: [
        { type: 'text', id: 'keyword', label: 'Pad (leave blank for random)', value: '', placeholder: 'OTP key material…' }
      ]
    },
    'che-vic': {
      label: 'VIC Comparison Model — Not Guevara’s Pad System', engine: 'vic',
      defaultMsg: 'COMRADES MOVE NORTH',
      inputs: [{ type: 'text', id: 'keyword', label: 'Personal Key', value: 'GUEVARA', placeholder: 'Personal phrase' }]
    },
    'ira-ciphers': {
      label: 'IRA Cipher Traffic (Twomey papers, 1926\u20131928)', engine: 'columnar',
      defaultMsg: 'SEND ADDRESS TO SMITH',
      inputs: [{ type: 'text', id: 'keyword', label: 'Transposition Keyword', value: 'IRELAND', placeholder: 'Keyword\u2026' }]
    },
    'latin-american-codebooks': {
      label: 'Invented Commercial Codebook Illustration', engine: 'commercialCode',
      defaultMsg: 'CARGO ARRIVED BUENOSAIRES',
      inputs: [{ type: 'text', id: 'keyword', label: 'Codebook (informational only)', value: 'COMERCIAL', placeholder: 'Invented vocabulary' }]
    },
    'diana-cryptosystem': {
      label: 'Diana Cryptosystem (US Special Forces OTP, 1960s–)', engine: 'diana',
      defaultMsg: 'EXTRACT NOW',
      inputs: [{ type: 'text', id: 'keyword', label: 'Pad Trigraphs', value: 'XKCDQNJVMZAPLR', placeholder: 'Random pad text\u2026' }]
    },
    'patterson-jefferson-cipher': {
      label: 'Patterson\u2019s Cipher for Jefferson (1801) \u2014 sections of \u22649 lines',
      engine: 'patterson',
      defaultMsg: 'IN CONGRESS JULY FOURTH',
      inputs: [{ type: 'text', id: 'keyword', label: 'Key \u2014 pairs of (line number, arbitrary letters)', value: '13,34,57,65,22,78,49', placeholder: '13,34,57,65,22,78,49' }]
    },
    'wadsworth': {
      label: 'Wadsworth Cipher Device (1817) \u2014 26:33 geared disks', engine: 'wadsworth',
      defaultMsg: 'ATTACK',
      inputs: [{ type: 'text', id: 'keyword', label: 'Inner-Disk Keyword', value: 'WADSWORTH', placeholder: 'Keyword\u2026' }]
    },
    'amharic-ge-ez-ciphers': {
      label: 'Illustrative Latin Substitution — Historical Attribution Unverified', engine: 'geezMonastic',
      defaultMsg: 'PRESERVE THE TEXT',
      inputs: [{ type: 'text', id: 'keyword', label: 'Latin Alphabet Seed', value: 'GEEZ', placeholder: 'Key word\u2026' }]
    },
    'vietnamese-underground': {
      label: 'Illustrative Substitution — No Specific Operational Attribution', engine: 'monoalphabetic',
      defaultMsg: 'ADVANCE TO POSITIONS',
      inputs: [{ type: 'text', id: 'keyword', label: 'Teaching Keyword', value: 'GIAIPHONG', placeholder: 'Key word\u2026' }]
    }
  };

  function buildDemo(container) {
    const cipherName = container.dataset.cipher;
    const config = CONFIGS[cipherName];
    if (!config || !window.CipherEngines) return;

    const engine = window.CipherEngines[config.engine];
    if (!engine) return;

    let mode = 'enc';
    const inputId = 'demo-msg-' + cipherName;
    const keyId = 'demo-key-' + cipherName;

    let inputsHTML = '';
    for (const inp of config.inputs) {
      if (inp.type === 'range') {
        inputsHTML += `
          <div class="input-group">
            <label class="input-label" for="${keyId}">${inp.label} — <span id="demo-range-val-${cipherName}">${inp.value}</span></label>
            <div class="range-row">
              <input type="range" class="museum-range" id="${keyId}" min="${inp.min}" max="${inp.max}" value="${inp.value}"
                aria-label="${inp.label}">
              <span class="range-val" id="demo-range-display-${cipherName}">${inp.value}</span>
            </div>
          </div>`;
      } else if (inp.type === 'textarea') {
        inputsHTML += `
          <div class="input-group">
            <label class="input-label" for="${keyId}">${inp.label}</label>
            <textarea class="museum-input" id="${keyId}" rows="2" placeholder="${inp.placeholder || ''}"
              aria-label="${inp.label}">${inp.value}</textarea>
          </div>`;
      } else {
        inputsHTML += `
          <div class="input-group">
            <label class="input-label" for="${keyId}">${inp.label}</label>
            <input class="museum-input" id="${keyId}" type="text" value="${inp.value}" placeholder="${inp.placeholder || ''}"
              aria-label="${inp.label}">
          </div>`;
      }
    }

    const modeToggle = config.encryptOnly ? `
      <div class="mode-toggle" role="group" aria-label="Cipher mode">
        <button class="mode-btn active" data-mode="enc" aria-pressed="true">Encrypt</button>
      </div>` : `
      <div class="mode-toggle" role="group" aria-label="Cipher mode">
        <button class="mode-btn active" data-mode="enc" aria-pressed="true">Encrypt</button>
        <button class="mode-btn" data-mode="dec" aria-pressed="false">Decrypt</button>
      </div>`;

    container.innerHTML = `
      <div class="demo-panel">
        <div class="demo-head">
          <span>🔐</span>
          <span class="demo-title">Try It Yourself</span>
        </div>
        <div class="demo-body">
          ${config.note ? `<p class="demo-model-note" style="grid-column:1/-1;margin:0;padding:.75rem 1rem;border:1px solid var(--gold-b);border-radius:var(--rs);color:var(--tx2);font-size:.9rem;line-height:1.55;"><strong>Model scope:</strong> ${config.note}</p>` : ''}
          <div class="demo-col">
            ${modeToggle}
            <div class="input-group">
              <label class="input-label" for="${inputId}">Message</label>
              <textarea class="museum-input" id="${inputId}" rows="3" placeholder="Type a message…"
                aria-label="Message input">${config.defaultMsg}</textarea>
            </div>
            ${inputsHTML}
          </div>
          <div class="demo-col">
            <div class="btn-group">
              <button class="btn btn-primary" id="demo-run-${cipherName}">Run Cipher</button>
              <button class="btn btn-secondary" id="demo-clear-${cipherName}">Clear</button>
            </div>
            <p class="demo-key-warning" role="status" hidden></p>
            <div class="input-group">
              <span class="input-label" id="demo-output-label-${cipherName}">Output</span>
              <div class="output-box" id="demo-output-${cipherName}" aria-live="polite" aria-labelledby="demo-output-label-${cipherName}" role="status">
                <span class="output-empty">Result appears here…</span>
              </div>
            </div>
          </div>
        </div>
      </div>`;

    // Wire events
    const modeButtons = container.querySelectorAll('.mode-btn');
    modeButtons.forEach(btn => {
      btn.addEventListener('click', () => {
        modeButtons.forEach(b => { b.classList.remove('active'); b.setAttribute('aria-pressed', 'false'); });
        btn.classList.add('active');
        btn.setAttribute('aria-pressed', 'true');
        mode = btn.dataset.mode;
      });
    });

    const rangeInput = container.querySelector('.museum-range');
    if (rangeInput) {
      const valSpan = document.getElementById('demo-range-val-' + cipherName);
      const displaySpan = document.getElementById('demo-range-display-' + cipherName);
      rangeInput.addEventListener('input', () => {
        if (valSpan) valSpan.textContent = rangeInput.value;
        if (displaySpan) displaySpan.textContent = rangeInput.value;
      });
    }

    function getKey() {
      const el = document.getElementById(keyId);
      return el ? el.value : '';
    }

    const runBtn = document.getElementById('demo-run-' + cipherName);
    const clearBtn = document.getElementById('demo-clear-' + cipherName);
    const outputBox = document.getElementById('demo-output-' + cipherName);
    const msgInput = document.getElementById(inputId);
    const keyWarning = container.querySelector('.demo-key-warning');

    runBtn.addEventListener('click', () => {
      const msg = msgInput.value;
      const key = getKey();
      keyWarning.hidden = true;
      keyWarning.textContent = '';
      if (config.engine === 'runningKey') {
        const keyLength = String(key).toUpperCase().replace(/[^A-Z]/g, '').length;
        const messageLength = msg.toUpperCase().replace(/[^A-Z]/g, '').length;
        if (!keyLength || keyLength < messageLength) {
          keyWarning.textContent = !keyLength
            ? 'No alphabetic key supplied: the engine uses its built-in teaching excerpt and repeats it if needed. Supply a book passage at least as long as your message for a non-repeating running key.'
            : 'This key has ' + keyLength + ' letters for ' + messageLength + ' message letters, so the teaching engine repeats it. This run is periodic, unlike a full-length non-repeating running key.';
          keyWarning.hidden = false;
        }
      }
      try {
        const result = mode === 'enc' ? engine.encode(msg, key) : engine.decode(msg, key);
        outputBox.innerHTML = '';
        outputBox.textContent = result;
      } catch (e) {
        outputBox.textContent = 'Error: ' + e.message;
      }
    });

    clearBtn.addEventListener('click', () => {
      msgInput.value = '';
      keyWarning.hidden = true;
      keyWarning.textContent = '';
      outputBox.innerHTML = '<span class="output-empty">Result appears here…</span>';
    });

    // Embed affordance — teachers can drop any demo into their own page.
    // Hidden on the embed page itself and when already inside an iframe.
    const isEmbedPage = /embed\.html$/.test(location.pathname);
    let framed = false;
    try { framed = window.self !== window.top; } catch { framed = true; }
    if (!isEmbedPage && !framed) {
      const snippet = '<iframe src="https://ciphermuseum.com/embed.html?cipher=' + cipherName +
        '" width="100%" height="520" style="border:1px solid #2e2e3a;border-radius:8px" ' +
        'title="' + config.label + ' interactive demo — The Cipher Museum" loading="lazy"></iframe>';
      const embed = document.createElement('details');
      embed.className = 'demo-embed';
      embed.style.cssText = 'margin-top:.5rem;font-family:var(--fm);font-size:.72rem;color:var(--tx3);';
      const summary = document.createElement('summary');
      summary.textContent = '‹/› Embed this demo on your own page';
      summary.style.cssText = 'cursor:pointer;letter-spacing:.06em;';
      const row = document.createElement('div');
      row.style.cssText = 'display:flex;gap:.5rem;margin-top:.5rem;flex-wrap:wrap;';
      const field = document.createElement('input');
      field.type = 'text';
      field.readOnly = true;
      field.value = snippet;
      field.setAttribute('aria-label', 'Embed code for this demo');
      field.className = 'museum-input';
      field.style.cssText = 'flex:1;min-width:220px;font-size:.7rem;';
      field.addEventListener('focus', () => field.select());
      const copy = document.createElement('button');
      copy.type = 'button';
      copy.className = 'btn btn-secondary';
      copy.textContent = 'Copy';
      copy.addEventListener('click', () => {
        const done = () => {
          copy.textContent = 'Copied!';
          setTimeout(() => { copy.textContent = 'Copy'; }, 2000);
        };
        if (navigator.clipboard && navigator.clipboard.writeText) {
          navigator.clipboard.writeText(snippet).then(done, () => field.select());
        } else { field.select(); try { document.execCommand('copy'); done(); } catch {} }
      });
      row.appendChild(field);
      row.appendChild(copy);
      embed.appendChild(summary);
      embed.appendChild(row);
      container.appendChild(embed);
    }

    // Auto-run on load for instant feedback
    runBtn.click();
  }

  /* ─── Sources & Further Reading ─── */
  const SOURCES = {
    caesar: [
      { text: "Suetonius, <em>The Twelve Caesars</em>, \"Divus Iulius\" §56 — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Caesar_cipher" },
      { text: "Simon Singh, <em>The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography</em> (1999; Anchor paperback, 2000), ch. 1", url: "https://simonsingh.net/books/the-code-book/" },
      { text: "Practical Cryptography — Caesar Cipher", url: "https://practicalcryptography.com/ciphers/caesar-cipher/" }
    ],
    polybius: [
      { text: "Polybius, <em>Histories</em>, Book X §45 — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Polybius_square" },
      { text: "Practical Cryptography — Polybius Square", url: "https://practicalcryptography.com/ciphers/polybius-cipher/" }
    ],
    scytale: [
      { text: "Plutarch, <em>Life of Lysander</em> §19 — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Scytale" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    monoalphabetic: [
      { text: "Al-Kindi, <em>A Manuscript on Deciphering Cryptographic Messages</em> (~850 AD) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Al-Kindi" },
      { text: "Simon Singh, <em>The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography</em> (1999; Anchor paperback, 2000), ch. 1", url: "https://simonsingh.net/books/the-code-book/" },
      { text: "Practical Cryptography — Simple Substitution", url: "https://practicalcryptography.com/ciphers/simple-substitution-cipher/" }
    ],
    homophonic: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Practical Cryptography — Homophonic Substitution", url: "https://practicalcryptography.com/ciphers/homophonic-substitution-cipher/" }
    ],
    babington: [
      { text: "Pollen, John Hungerford. <em>Mary Queen of Scots and the Babington Plot</em> (Scottish History Society, 1922)" },
      { text: "Simon Singh, <em>The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography</em> (1999; Anchor paperback, 2000), ch. 1 — \"The Cipher of Mary Queen of Scots\"", url: "https://simonsingh.net/books/the-code-book/" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "British Library — Digitised manuscripts and archives (collection portal)", url: "https://www.bl.uk/collection/digitised-manuscripts-archives" }
    ],
    voynich: [
      { text: "Mary E. D’Imperio, <em>The Voynich Manuscript: An Elegant Enigma</em> (1978), §§5.1–5.2 and 6.2–6.6." },
      { text: "Sravana Reddy and Kevin Knight, <em>What We Know About The Voynich Manuscript</em> (2011), §§4.1–4.2 and Table 2.", url: "https://aclanthology.org/W11-1511/" },
      { text: "René Zandbergen, <em>Transliteration of the Text</em>, including the Landini–Zandbergen EVA design.", url: "https://www.voynich.nu/transcr.html" },
      { text: "Stephen Bax, <em>A Proposed Partial Decoding of the Voynich Script</em> (2014), abstract and proposed readings.", url: "https://stephenbax.net/?page_id=11" },
      { text: "University of Bristol, <em>Statement re: Voynich research paper</em> (16 May 2019).", url: "https://www.bristol.ac.uk/news/2019/may/voynich-manuscript.html" }
    ],
    playfair: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Practical Cryptography — Playfair Cipher", url: "https://practicalcryptography.com/ciphers/playfair-cipher/" }
    ],
    m209: [
      { text: "War Department, <em>TM 11-380: Converter M-209, M-209-A, M-209-B</em> (17 March 1944)", url: "https://www.nsa.gov/news-features/declassified-documents/friedman-documents/assets/files/publications/FOLDER_075/41709299074861.pdf" }
    ],
    hill: [
      { text: "Hill, Lester S., \"Cryptography in an Algebraic Alphabet,\" <em>American Math Monthly</em> 36 (1929) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Hill_cipher" },
      { text: "Practical Cryptography — Hill Cipher", url: "https://practicalcryptography.com/ciphers/hill-cipher/" }
    ],
    vigenere: [
      { text: "Vigenère, Blaise de. <em>Traicté des chiffres</em> (1586) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher" },
      { text: "Kasiski, Friedrich. <em>Die Geheimschriften und die Dechiffrirkunst</em> (1863) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Kasiski_examination" },
      { text: "Simon Singh, <em>The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography</em> (1999; Anchor paperback, 2000), ch. 2", url: "https://simonsingh.net/books/the-code-book/" }
    ],
    beaufort: [
      { text: "Beaufort, Sir Francis. <em>Cipher system</em> (1857) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Beaufort_cipher" },
      { text: "Practical Cryptography — Beaufort Cipher", url: "https://practicalcryptography.com/ciphers/beaufort-cipher/" }
    ],
    gronsfeld: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    porta: [
      { text: "Satoshi Tomokiyo, Cryptiana — Porta’s <em>De furtivis literarum notis</em> (1563): illustrated analysis", url: "https://cryptiana.web.fc2.com/code/porta.htm" }
    ],
    runningKey: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Practical Cryptography — Running Key Cipher", url: "https://practicalcryptography.com/ciphers/running-key-cipher/" }
    ],
    railFence: [
      { text: "Practical Cryptography — Rail Fence Cipher", url: "https://practicalcryptography.com/ciphers/rail-fence-cipher/" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    columnar: [
      { text: "Practical Cryptography — Columnar Transposition", url: "https://practicalcryptography.com/ciphers/columnar-transposition-cipher/" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    doubleTransposition: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    bacon: [
      { text: "Bacon, Francis. <em>De Augmentis Scientiarum</em> (1623) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Bacon%27s_cipher" },
      { text: "Simon Singh, <em>The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography</em> (1999; Anchor paperback, 2000), ch. 1", url: "https://simonsingh.net/books/the-code-book/" }
    ],
    tapCode: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Jim and Sybil Stockdale, <em>In Love and War: The Story of a Family’s Ordeal and Sacrifice During the Vietnam Years</em> (1984) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Tap_code" }
    ],
    pigpen: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    bifid: [
      { text: "Delastelle, Félix. <em>Traité élémentaire de cryptographie</em> (1902) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Bifid_cipher" },
      { text: "Practical Cryptography — Bifid Cipher", url: "https://practicalcryptography.com/ciphers/bifid-cipher/" }
    ],
    trifid: [
      { text: "Delastelle, Félix. <em>Traité élémentaire de cryptographie</em> (1902) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Trifid_cipher" }
    ],
    adfgx: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    adfgvx: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Practical Cryptography — ADFGVX Cipher", url: "https://practicalcryptography.com/ciphers/adfgvx-cipher/" }
    ],
    nihilist: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Practical Cryptography — Nihilist Cipher", url: "https://practicalcryptography.com/ciphers/nihilist-cipher/" }
    ],
    otp: [
      { text: "Shannon, Claude. \"Communication Theory of Secrecy Systems\" (1949) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/One-time_pad" },
      { text: "Vernam, Gilbert. US Patent 1,310,719 (1919) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Gilbert_Vernam" }
    ],
    fractionatedMorse: [
      { text: "Practical Cryptography — Fractionated Morse", url: "https://practicalcryptography.com/ciphers/fractionated-morse-cipher/" }
    ],
    confederateVigenere: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    bazeries: [
      { text: "Bazeries, Étienne. <em>Les Chiffres et les Lettres</em> (1901) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Bazeries_cylinder" }
    ],
    alberti: [
      { text: "Alberti, Leon Battista. <em>De Componendis Cifris</em> (1467) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Alberti_cipher" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    jefferson: [
      { text: "Jefferson, Thomas. Papers, 1795 — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Jefferson_disk" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    enigma: [
      { text: "Andrew Hodges, <em>Alan Turing: The Enigma</em> (1983; centenary edition, 2014)", url: "https://www.turing.org.uk/book/" },
      { text: "Simon Singh, <em>The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography</em> (1999; Anchor paperback, 2000), ch. 4–6", url: "https://simonsingh.net/books/the-code-book/" },
      { text: "David Kahn, <em>Seizing the Enigma: The Race to Break the German U-Boat Codes, 1939–1945</em> (revised edition, 2012)", url: "https://www.usni.org/press/books/seizing-enigma" }
    ],
    lorenz: [
      { text: "B. Jack Copeland (ed.), <em>Colossus: The Secrets of Bletchley Park’s Codebreaking Computers</em> (2006) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Lorenz_cipher" },
      { text: "Simon Singh, <em>The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography</em> (1999; Anchor paperback, 2000), ch. 6", url: "https://simonsingh.net/books/the-code-book/" }
    ],
    dictionaryCode: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    stager: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    vic: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    vernam: [
      { text: "Vernam, Gilbert. US Patent 1,310,719 (1919) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Gilbert_Vernam" },
      { text: "Shannon, Claude. \"Communication Theory of Secrecy Systems\" (1949) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/One-time_pad" }
    ],
    "navajo-code-talkers": [
      { text: "William C. Meadows, <em>The Comanche Code Talkers of World War II</em> (2002) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Code_talker" },
      { text: "National Museum of the American Indian — <em>Native Words, Native Warriors</em>: Code Talking", url: "https://americanindian.si.edu/nk360/code-talkers/code-talking/" }
    ],
    zodiac: [
      { text: "Oranchak, David et al. \"Cracking the Zodiac 340-Character Cipher\" (2020) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Zodiac_Killer#Communications" },
      { text: "Simon Singh, <em>The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography</em> (1999; Anchor paperback, 2000), ch. 8", url: "https://simonsingh.net/books/the-code-book/" }
    ],
    autokey: [
      { text: "Vigenère, Blaise de. <em>Traicté des chiffres</em> (1586) — autokey variant — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Autokey_cipher" },
      { text: "Practical Cryptography — Autokey Cipher", url: "https://practicalcryptography.com/ciphers/autokey-cipher/" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    nomenclator: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Simon Singh, <em>The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography</em> (1999; Anchor paperback, 2000), ch. 1", url: "https://simonsingh.net/books/the-code-book/" }
    ],
    bookCipher: [
      { text: "Ward, James B. <em>The Beale Papers</em> (1885) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Beale_ciphers" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    sigaba: [
      { text: "Stamp &amp; Chan, \"SIGABA: Cryptanalysis of the Full Keyspace\" (2007) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/SIGABA" },
      { text: "NSA Center for Cryptologic History — SIGABA", url: "https://www.nsa.gov/History/Cryptologic-History/" }
    ],
    typex: [
      { text: "Erskine, Ralph. \"The Development of Typex\" (Cryptologia, 1997) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Typex" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." }
    ],
    jn25: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Elliot Carlson, <em>Joe Rochefort's War: The Odyssey of the Codebreaker Who Outwitted Yamamoto at Midway</em> (2011)", url: "https://www.usni.org/press/books/joe-rocheforts-war" },
      { text: "Jonathan Parshall and Anthony Tully, <em>Shattered Sword: The Untold Story of the Battle of Midway</em> (2005) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Battle_of_Midway" }
    ],
    redTypeA: [
      { text: "Rowlett, Frank. <em>The Story of Magic</em> (1998; library catalog record)", url: "https://ci.nii.ac.jp/ncid/BA54201586" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "NSA CCH materials on SIS Japanese machine exploitation", url: "https://www.nsa.gov/History/Cryptologic-History/" }
    ],
    affine: [
      { text: "Lyons, James. \"Affine Cipher\" — Practical Cryptography", url: "https://practicalcryptography.com/ciphers/classical-era/affine/" },
      { text: "Stinson, Douglas. <em>Cryptography: Theory and Practice</em>, ch. 1 (modular arithmetic primer) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Affine_cipher" },
      { text: "Wikipedia — Affine cipher (key-space derivation)", url: "https://en.wikipedia.org/wiki/Affine_cipher" }
    ],
    trithemius: [
      { text: "Trithemius, Johannes. <em>Polygraphia</em> (1518) — first printed cryptography book — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Polygraphia_(book)" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Practical Cryptography — Trithemius cipher", url: "https://practicalcryptography.com/ciphers/classical-era/trithemius/" }
    ],
    cardanoAutokey: [
      { text: "Cardano, Girolamo. <em>De Subtilitate</em> (1550) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Gerolamo_Cardano" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Wikipedia — Autokey cipher (history section)", url: "https://en.wikipedia.org/wiki/Autokey_cipher" }
    ],
    wheatstone: [
      { text: "Wheatstone, Charles. <em>Cryptograph</em> — 1867 Paris Universal Exposition (described in Kahn) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Charles_Wheatstone#Cryptography" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Crypto Museum — Cipher disks and dial machines", url: "https://www.cryptomuseum.com/crypto/" }
    ],
    morse: [
      { text: "ITU-R Recommendation M.1677 — International Morse Code", url: "https://www.itu.int/rec/R-REC-M.1677/" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Wikipedia — Morse code", url: "https://en.wikipedia.org/wiki/Morse_code" }
    ],
    cardanoGrille: [
      { text: "Cardano, Girolamo. <em>De Subtilitate</em> (1550) — original grille proposal — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Cardan_grille" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Wikipedia — Grille (cryptography)", url: "https://en.wikipedia.org/wiki/Grille_(cryptography)" }
    ],
    nullCipher: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Wikipedia — Null cipher", url: "https://en.wikipedia.org/wiki/Null_cipher" },
      { text: "Stamatatos, Efstathios. \"A Survey of Modern Authorship Attribution Methods\" (2009) — statistical detection of constrained text — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Stylometry" }
    ],
    fialka: [
      { text: "Crypto Museum — Fialka M-125 deep dive", url: "https://www.cryptomuseum.com/crypto/fialka/" },
      { text: "Wikipedia — Fialka", url: "https://en.wikipedia.org/wiki/Fialka" },
      { text: "Reuvers &amp; Simons, \"Fialka History &amp; Operation\" (Crypto Museum, 2009)", url: "https://www.cryptomuseum.com/crypto/fialka/files/" }
    ],
    kl7: [
      { text: "Crypto Museum — KL-7 (TSEC/KL-7 ADONIS)", url: "https://www.cryptomuseum.com/crypto/usa/kl7/" },
      { text: "NSA Cryptologic History — general history portal", url: "https://www.nsa.gov/History/Cryptologic-History/" },
      { text: "Wikipedia — KL-7", url: "https://en.wikipedia.org/wiki/KL-7" }
    ],
    geheimschreiber: [
      { text: "Crypto Museum — Siemens &amp; Halske T52 Geheimschreiber", url: "https://www.cryptomuseum.com/crypto/siemens/t52/" },
      { text: "Bengt Beckman, <em>Codebreakers: Arne Beurling and the Swedish Crypto Program during World War II</em> (English edition, 2002) — related Wikipedia overview", url: "https://en.wikipedia.org/wiki/Arne_Beurling" },
      { text: "Wikipedia — Siemens and Halske T52 / \"Sturgeon\" / Fish (cryptography)", url: "https://en.wikipedia.org/wiki/Siemens_and_Halske_T52" }
    ],
    kryha: [
      { text: "NSA — William F. Friedman documents (declassified collection portal)", url: "https://www.nsa.gov/Helpful-Links/NSA-FOIA/Declassification-Transparency-Initiatives/Historical-Releases/Friedman-Documents/" },
      { text: "Crypto Museum — Kryha Standard Cipher Machine", url: "https://www.cryptomuseum.com/crypto/kryha/" },
      { text: "Wikipedia — Kryha", url: "https://en.wikipedia.org/wiki/Kryha" }
    ],
    m94: [
      { text: "Crypto Museum — M-94 / CSP-488", url: "https://www.cryptomuseum.com/crypto/usa/m94/" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Wikipedia — M-94 and M-138-A", url: "https://en.wikipedia.org/wiki/M-94" }
    ],
    chineseTelegraph: [
      { text: "Wikipedia — Chinese telegraph code", url: "https://en.wikipedia.org/wiki/Chinese_telegraph_code" },
      { text: "Thomas S. Mullaney, <em>The Chinese Typewriter: A History</em> (2017; paperback, 2018)", url: "https://mitpress.mit.edu/9780262536103/the-chinese-typewriter/" },
      { text: "Columbia University Libraries — Chinese Telegraphic Codebooks and Cryptography (collection overview, 2019)", url: "https://blogs.library.columbia.edu/rbml/2019/10/09/chinese-telegraphic-codebooks-and-cryptography/" }
    ],
    zimmermann: [
      { text: "NSA Center for Cryptologic History — The Zimmermann Telegram", url: "https://www.nsa.gov/Helpful-Links/NSA-FOIA/Declassification-Transparency-Initiatives/Historical-Releases/" },
      { text: "Tuchman, Barbara W. <em>The Zimmermann Telegram</em> (1985 edition; first published 1958)", url: "https://www.penguinrandomhouse.com/books/180859/the-zimmermann-telegram-by-barbara-w-tuchman/" },
      { text: "National Archives — Zimmermann Telegram (decoded text)", url: "https://www.archives.gov/education/lessons/zimmermann" },
      { text: "Thomas Boghardt, <em>The Zimmermann Telegram: Intelligence, Diplomacy, and America’s Entry into World War I</em> (2012)", url: "https://www.usni.org/press/books/zimmermann-telegram" }
    ],
    slidex: [
      { text: "Crypto Museum — Slidex", url: "https://www.cryptomuseum.com/crypto/uk/slidex/" },
      { text: "Wikipedia — Slidex", url: "https://en.wikipedia.org/wiki/Slidex" },
      { text: "GCHQ — History articles and resources", url: "https://www.gchq.gov.uk/section/advice-guidance/all-topics?topics=History" }
    ],
    commercialCode: [
      { text: "Wikipedia — Commercial code (communications), general overview", url: "https://en.wikipedia.org/wiki/Commercial_code_(communications)" },
      { text: "Bentley's Complete Phrase Code (1906)" },
      { text: "ABC Telegraphic Code, 5th edition (1901)" },
      { text: "Tom Standage, <em>The Victorian Internet: The Remarkable Story of the Telegraph and the Nineteenth Century’s On-Line Pioneers</em> (1998), cultural context." }
    ],
    culperRing: [
      { text: "Rose, Alexander. <em>Washington’s Spies: The Story of America’s First Spy Ring</em> (2007 paperback; first published 2006)", url: "https://www.penguinrandomhouse.com/books/157145/washingtons-spies-by-alexander-rose/" },
      { text: "Library of Congress — Tallmadge's codebook (digitised pages)", url: "https://www.loc.gov/collections/george-washington-papers/" },
      { text: "Mount Vernon — “Culper Spy Ring Codes”, full transcription of the code book (PDF). This is the source for the numbers quoted on this page: 711 = “Gen Washington”, 727 = “New York”", url: "https://mtv-main-assets.mountvernon.org/files/resources/culpercodebook.pdf" },
      { text: "Mount Vernon — The Culper Code Book", url: "https://www.mountvernon.org/george-washington/the-revolutionary-war/spying-and-espionage/the-culper-code-book" },
      { text: "Wikipedia — Culper Ring", url: "https://en.wikipedia.org/wiki/Culper_Ring" }
    ],
    arnoldAndre: [
      { text: "Wikipedia — Benedict Arnold and John André correspondence", url: "https://en.wikipedia.org/wiki/Benedict_Arnold" },
      { text: "Bakeless, John. <em>Turncoats, Traitors and Heroes</em> (1998 reprint; first published 1959)", url: "https://www.hachettebookgroup.com/titles/john-bakeless/turncoats-traitors-and-heroes/9780306808432/" },
      { text: "Mount Vernon — André's captured ciphered letter", url: "https://www.mountvernon.org/library/digitalhistory/digital-encyclopedia/article/john-andre/" },
      { text: "Cipher History — Arnold-André book cipher analysis", url: "https://www.tandfonline.com/journals/ucry20" }
    ],
    argenti: [
      { text: "Meister, Aloys. <em>Die Geheimschrift im Dienste der päpstlichen Kurie</em> (1906)" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Vatican Apostolic Archive — Argenti family papers (Trattato in Cifra)", url: "https://www.archivioapostolicovaticano.va/content/aav/en.html" }
    ],
    wallisCiphers: [
      { text: "Wallis, John. Cipher notes — Bodleian Library MSS", url: "https://www.bodleian.ox.ac.uk/" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Smith, David Eugene. <em>John Wallis as a Cryptographer</em> (Bulletin AMS, 1917)", url: "https://www.ams.org/journals/bull/1917-24-02/S0002-9904-1917-02954-X/" },
      { text: "Wikipedia — John Wallis", url: "https://en.wikipedia.org/wiki/John_Wallis" }
    ],
    "raf-otp": [
      { text: "Aust, Stefan. <em>The Baader-Meinhof Complex</em> (2008 English ed.)", url: "https://www.bodleyhead.co.uk/" },
      { text: "Peters, Butz. <em>Tödlicher Irrtum: Die Geschichte der RAF</em> (2007 paperback; first published 2004)", url: "https://www.fischerverlage.de/buch/butz-peters-toedlicher-irrtum-9783596172658" },
      { text: "Bundeskriminalamt — RAF forensic archive (Stammheim materials)", url: "https://www.bka.de/" },
      { text: "Wikipedia — Red Army Faction (Communications &amp; Tradecraft)", url: "https://en.wikipedia.org/wiki/Red_Army_Faction" }
    ],
    "che-vic": [
      { text: "Anderson, Jon Lee. <em>Che Guevara: A Revolutionary Life</em> (1997)", url: "https://www.groveatlantic.com/book/che-guevara/" },
      { text: "CIA FOIA — “Guevara Cryptography” (1967 Bolivian capture, declassified)", url: "https://www.cia.gov/readingroom/" },
      { text: "National Security Archive — Bolivia &amp; Che Guevara documents (Peter Kornbluh)", url: "https://nsarchive.gwu.edu/" },
      { text: "Wikipedia — VIC Cipher", url: "https://en.wikipedia.org/wiki/VIC_cipher" }
    ],
    "ira-ciphers": [
          {
                "text": "Tom Mahon and James J. Gillogly, <em>Decoding the IRA</em> (2008)."
          },
          {
                "text": "Elonka Dunin and Klaus Schmeh, <em>Codebreaking: A Practical Guide</em> (Robinson, 2020), the Gillogly and Bean IRA transposition case studies."
          },
          {
                "text": "University of Queensland, “UQ data scientist cracks near century old crypto-code” (23 August 2019), documenting Richard Bean’s solution.",
                "url": "https://news.uq.edu.au/2019-08-23-uq-data-scientist-cracks-near-century-old-crypto-code"
          }
    ],
    "latin-american-codebooks": [
      { text: "<em>Código Comercial Mexicano</em> (Mexican commercial telegraph code)", url: "https://www.bnm.unam.mx/" },
      { text: "<em>ABC Universal Commercial Telegraphic Code</em>, 6th edition (1920)." },
      { text: "Bentley, E.L. <em>Bentley’s Complete Phrase Code</em> (1906)" }
    ],
    "diana-cryptosystem": [
      { text: "US Army FM 34-40-2 — Cryptanalysis (declassified editions)", url: "https://armypubs.army.mil/" },
      { text: "Moore, Tyler. “The Diana Cryptosystem” (IEEE Privacy &amp; Security Magazine, 2002)", url: "https://www.computer.org/csdl/magazine/sp" },
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Wikipedia — Beaufort cipher (mathematical kin)", url: "https://en.wikipedia.org/wiki/Beaufort_cipher" }
    ],
    "patterson-jefferson-cipher": [
      { text: "Smithline, Lawren M. “A Cipher to Thomas Jefferson”, <em>American Scientist</em> 97(2), 2009, 142–149", url: "https://www.americanscientist.org/article/a-cipher-to-thomas-jefferson" },
      { text: "Robert Patterson to Thomas Jefferson, 19 December 1801 — Founders Online", url: "https://founders.archives.gov/documents/Jefferson/01-36-02-0025" },
      { text: "Thomas Jefferson to Robert Patterson, 22 March 1802 — Founders Online", url: "https://founders.archives.gov/documents/Jefferson/01-37-02-0083" },
      { text: "Thomas Jefferson, 12 April 1802, Patterson’s Cipher — Library of Congress", url: "https://www.loc.gov/resource/mtj1.026_0086_0094/?st=gallery" }
    ],
    wadsworth: [
      { text: "Kruh, Louis. “The Mystery of Colonel Decius Wadsworth’s Cipher Device”, <em>Cryptologia</em> 6(3), 1982, 238–247", url: "https://doi.org/10.1080/0161-118291857037" },
      { text: "“Decius Wadsworth Disc Cipher” — William F. Friedman collection, NSA (declassified)", url: "https://archive.org/stream/41788379082740/41788379082740_djvu.txt" },
      { text: "National Cryptologic Foundation — Inventors’ Day &amp; the Wadsworth Cipher", url: "https://archive.cryptologicfoundation.org/community/cryptologic-history/cryptologic-history-calendar.html/event/2026/02/11/1770807600/inventors-day-the-wadsworth-cipher/496980" },
      { text: "Kaeding, Thomas. “Automated ciphertext-only attack on the Wheatstone Cryptograph and related devices”, IACR ePrint 2020/1492", url: "https://eprint.iacr.org/2020/1492" }
    ],
    "dagapeyeff": [
          {
                "text": "Alexander d’Agapeyeff, <em>Codes and Ciphers</em> (Oxford University Press, 1939). The challenge-page photograph consulted is numbered 158; its edition is not identified by that image."
          },
          {
                "text": "Hyde &amp; Rugg, “The D’Agapeyeff Cipher” — the researchers’ account of their work; a possible error is a hypothesis, not an established defect.",
                "url": "https://www.hydeandrugg.com/our-research/codes-ciphers/the-dagapeyeff-cipher/"
          }
    ],
    "dorabella": [
          {
                "text": "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996), chapter 21."
          },
          {
                "text": "Bradley Hauer, Colin Choi, Abram Hindle, Scott Smallwood and Grzegorz Kondrak, “Dorabella Cipher as Musical Inspiration” (2025), especially §4.1. Creative musical interpretation, not an authenticated solution.",
                "url": "https://arxiv.org/abs/2509.17950"
          }
    ],
    "phaistos-disc": [
          {
                "text": "Michael Everson, “Phaistos Disc: U+101D0–U+101FF” (2011), corpus transcription. The widget counts the 45 sign classes and excludes the marked gap and combining oblique strokes.",
                "url": "https://www.evertype.com/standards/csur/phaistos-sample.html"
          },
          {
                "text": "Ireland, “Response to L2/11-126 ‘Phaistos Disc Errata’” (2011), pp. 1–3: writing direction and overlapping impressions.",
                "url": "https://www.unicode.org/L2/L2011/11166-phaistos-response.pdf"
          },
          {
                "text": "Heraklion Archaeological Museum, “The Phaistos Disc”: holding institution and catalogue description.",
                "url": "https://www.heraklionmuseum.gr/en/exhibit/the-phaistos-disc/"
          }
    ],
    "shugborough": [
          {
                "text": "National Trust Heritage Records, “Shepherd’s Monument, Shugborough Estate”, MNA181338: relief, inscription and architectural dating.",
                "url": "https://heritagerecords.nationaltrust.org.uk/HBSMR/MonRecord.aspx?skin=printerfriendly&uid=MNA181338"
          }
    ],
    "mccormick": [
          {
                "text": "Federal Bureau of Investigation, “Cryptanalysts, Part 2: Help Solve an Open Murder Case” (29 March 2011), <em>The FBI Story 2011</em>, p. 25. Evidence of what the agency reported in 2011, not a new case-status announcement.",
                "url": "https://www.fbi.gov/file-repository/reports-and-publications/stats-services-publications-fbi-story-fbistory2011.pdf"
          }
    ],
    "sator-square": [
          {
                "text": "Archaeological Park of Pompeii, “The Sator Square from the Palestra Grande” (2022), inventory 20565: first-century graffito and archaeological location.",
                "url": "https://pompeiicommitment.org/en/historiae/il-quadrato-del-sator-dalla-palestra-grande/"
          }
    ],
    greatCipher: [
      { text: "David Kahn, <em>The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet</em>, revised edition (1996)." },
      { text: "Wikipedia — Étienne Bazeries (career and the three-year attack on the Rossignol papers)", url: "https://en.wikipedia.org/wiki/%C3%89tienne_Bazeries" },
      { text: "Wikipedia — Great Cipher (records the syllabic code and the “ignore the previous codegroup” trap)", url: "https://en.wikipedia.org/wiki/Great_Cipher" }
    ],
    "amharic-ge-ez-ciphers": [
      { text: "Six, Verona, with Ernst Hammerschmidt. <em>Äthiopische Handschriften 1: Die Handschriften der Staatsbibliothek Preußischer Kulturbesitz</em>", url: "https://www.steiner-verlag.de/AEthiopische-Handschriften-1/9783515030366" },
      { text: "Hill Museum &amp; Manuscript Library — Ethiopia manuscript preservation overview", url: "https://hmml.org/about/global-operations/Ethiopia/" },
      { text: "Haile, Getatchew, et al. <em>Catalogue of the Ethiopic Manuscript Imaging Project</em>, Vol. 1: Codices 1–105, Magic Scrolls 1–134 (2009)", url: "https://wipfandstock.com/9781606088715/catalogue-of-the-ethiopic-manuscript-imaging-project/" },
      { text: "Wikipedia — Geʼez script", url: "https://en.wikipedia.org/wiki/Ge%CA%BDez_script" }
    ]
  };

  const GENERAL_RESOURCES = [
    { text: 'Crypto Museum — Encyclopedic hardware-focused archive (Enigma variants, spy gear, thousands of photos)', url: 'https://www.cryptomuseum.com/' },
    { text: 'CrypTool-Online — Interactive encrypt / decrypt / analysis tools for many classical ciphers', url: 'https://www.cryptool.org/en/cto/' },
    { text: 'CrypTool Open-Source Project (GitHub)', url: 'https://github.com/cryptool-org' },
    { text: 'National Cryptologic Museum (NSA) — Virtual exhibits on VENONA, Purple, and 20th-century crypto', url: 'https://www.nsa.gov/Museum/' },
    { text: 'Cipher Machines &amp; Cryptology — Deep technical simulations of cipher machines', url: 'https://www.ciphermachinesandcryptology.com/' },
    { text: 'Practical Cryptography — Cipher encyclopaedia with detailed algorithms &amp; analysis', url: 'https://practicalcryptography.com/ciphers/' },
    { text: 'CyberChef — GCHQ\'s open-source data transformation playground', url: 'https://gchq.github.io/CyberChef/' },
    { text: 'CryptoHack — Modern cryptography puzzles &amp; challenges', url: 'https://cryptohack.org/' }
  ];

  /* Twelve SOURCES entries were keyed in camelCase while their pages carry the
     hyphenated slug in data-cipher, so the curated citations silently rendered
     as an empty list and the page showed only the generic resources. Map the
     slug a page actually uses onto the key the citations live under. */
  const SOURCE_KEY_ALIASES = {
    'jn-25': 'jn25',
    'red-type-a': 'redTypeA',
    'cardano-autokey': 'cardanoAutokey',
    'cardano-grille': 'cardanoGrille',
    'null-cipher': 'nullCipher',
    'kl-7': 'kl7',
    'm-94': 'm94',
    'chinese-telegraph': 'chineseTelegraph',
    'commercial-codebooks': 'commercialCode',
    'culper-ring': 'culperRing',
    'arnold-andre': 'arnoldAndre',
    'wallis-ciphers': 'wallisCiphers'
  };

  function buildSources(cipherName) {
    const key = SOURCES[cipherName] ? cipherName : (SOURCE_KEY_ALIASES[cipherName] || cipherName);
    const sources = SOURCES[key] || [];
    const target = document.querySelector('.exhibit-side') || document.querySelector('.exhibit-main');
    if (!target) return;

    function renderList(items) {
      return '<ul style="list-style:none;display:flex;flex-direction:column;gap:.75rem;margin:0;padding:0;">' +
        items.map(function (s) {
          return '<li style="font-size:.92rem;line-height:1.65;color:var(--tx2);">' +
            (s.url ? '<a href="' + s.url + '" target="_blank" rel="noopener noreferrer" style="color:var(--gold);">' + s.text + ' ↗</a>' : s.text) + '</li>';
        }).join('') + '</ul>';
    }

    var body = '';
    if (sources.length) {
      body += '<h3 style="color:var(--tx1);margin:0 0 .75rem;font-size:.95rem;">Exhibit Sources</h3>' +
              renderList(sources);
      body += '<hr style="border:none;border-top:1px solid var(--gold-b);margin:1.25rem 0;">';
    }
    body += '<h3 style="color:var(--tx1);margin:0 0 .75rem;font-size:.95rem;">General Cryptography Resources</h3>' +
            renderList(GENERAL_RESOURCES);

    const panel = document.createElement('div');
    panel.className = 'panel';
    panel.style.borderColor = 'var(--gold-b)';
    panel.innerHTML = '<div class="panel-head" style="background:var(--gold-glow);border-color:var(--gold-b);">' +
      '<span class="panel-icon">📚</span>' +
      '<span class="panel-title" style="color:var(--gold);">Further Reading &amp; Sources</span></div>' +
      '<div class="panel-body">' + body + '</div>';
    target.appendChild(panel);
  }

  document.addEventListener('DOMContentLoaded', () => {
    document.querySelectorAll('.demo-section[data-cipher]').forEach(function(el) {
      if (!el.children.length) {
        el.innerHTML = '<p style="color:var(--tx3);font-family:var(--fm);font-size:.85rem;padding:1.5rem;text-align:center;border:1px dashed var(--s5);border-radius:var(--rl);">Loading interactive demo\u2026</p>';
      }
      buildDemo(el);
    });
    const cipherEl = document.querySelector('.demo-section[data-cipher]') ||
                     document.querySelector('[data-cipher]');
    if (cipherEl) buildSources(cipherEl.dataset.cipher);
  });
})();