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<!DOCTYPE html>
<html lang="en" class="dark">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Enigma Vault - Secure Note & Password Pad</title>

    <!-- Tailwind CSS CDN -->
    <script src="https://cdn.tailwindcss.com"></script>

    <!-- Font Awesome CDN -->
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css">

    <!-- Google Fonts (Poppins) -->
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap" rel="stylesheet">

    <style>
        body {
            font-family: 'Poppins', sans-serif;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: #1e293b; }
        ::-webkit-scrollbar-thumb { background: #475569; border-radius: 10px; }
        ::-webkit-scrollbar-thumb:hover { background: #64748b; }
        
        #note-body {
             height: calc(100vh - 10rem); /* Adjust height dynamically */
        }
        
        .strength-bar {
            transition: all 0.3s ease-in-out;
        }
        
        /* Fix for password overflow */
        #generated-password {
            overflow-wrap: break-word;
            word-break: break-all;
        }
    </style>
</head>
<body class="bg-slate-900 text-slate-300">

    <div class="flex h-screen">
        <!-- Sidebar -->
        <aside class="w-1/3 md:w-1/4 lg:w-1/5 bg-slate-800/70 p-4 flex flex-col border-r border-slate-700">
            <header class="mb-4">
                <h1 class="text-2xl font-bold text-white text-center">Enigma Vault</h1>
                <p class="text-xs text-slate-400 text-center mb-4">Your Private Notes & Passwords</p>
                <button id="new-note-btn" class="w-full bg-green-600 hover:bg-green-700 text-white font-bold py-2 px-4 rounded-lg transition duration-300 flex items-center justify-center gap-2">
                    <i class="fas fa-plus"></i> New Note
                </button>
            </header>
            
            <div id="note-list" class="flex-grow overflow-y-auto space-y-2">
                <!-- Notes will be dynamically inserted here -->
            </div>

            <footer class="mt-4 pt-4 border-t border-slate-700 space-y-2">
                 <button id="open-password-generator-btn" class="w-full bg-slate-700 hover:bg-slate-600 text-white font-bold py-2 px-4 rounded-lg transition duration-300 flex items-center justify-center gap-2">
                    <i class="fas fa-key"></i> Password Generator
                </button>
                <button id="download-all-btn" class="w-full bg-slate-700 hover:bg-slate-600 text-white font-bold py-2 px-4 rounded-lg transition duration-300 flex items-center justify-center gap-2">
                    <i class="fas fa-file-archive"></i> Download All Notes
                </button>
                <div id="privacy-notice" class="text-center text-xs text-slate-500 mt-2 p-2">
    <i class="fas fa-exclamation-triangle"></i> <strong>Temporary Pad.</strong> All notes are deleted if you refresh or close the page. Nothing is saved permanently.
</div>
            </footer>
        </aside>

        <!-- Main Content -->
        <main class="w-2/3 md:w-3/4 lg:w-4/5 p-4 sm:p-6 md:p-8">
            <!-- Welcome Screen -->
            <div id="welcome-screen" class="flex flex-col items-center justify-center h-full text-center">
                <i class="fas fa-book-open text-6xl text-slate-600 mb-4"></i>
                <h2 class="text-3xl font-bold text-white">Welcome to Enigma Vault</h2>
                <p class="text-slate-400 mt-2">Select a note from the list or create a new one to get started.</p>
            </div>

            <!-- Note Editor -->
            <div id="note-editor" class="hidden h-full flex flex-col">
                <div class="flex justify-between items-center mb-4 gap-4">
                    <input type="text" id="note-title" class="w-full bg-transparent text-3xl font-bold text-white focus:outline-none" placeholder="Note Title">
                    <div class="flex items-center gap-2 flex-shrink-0">
                         <button id="download-note-btn" title="Download this note" class="text-green-500 hover:text-green-400 p-2 rounded-full">
                            <i class="fas fa-download fa-lg"></i>
                        </button>
                        <button id="delete-note-btn" title="Delete this note" class="text-red-500 hover:text-red-400 p-2 rounded-full">
                            <i class="fas fa-trash-alt fa-lg"></i>
                        </button>
                    </div>
                </div>
                <textarea id="note-body" class="w-full flex-grow bg-slate-800/50 rounded-lg p-4 text-slate-200 focus:outline-none focus:ring-2 focus:ring-green-500" placeholder="Start writing your secure thoughts..."></textarea>
            </div>
        </main>
    </div>

    <!-- Password Generator Modal -->
    <div id="password-generator-modal" class="hidden fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center p-4 z-50">
        <div class="bg-slate-800 rounded-xl shadow-lg p-6 w-full max-w-md border-t-4 border-amber-500">
            <div class="flex justify-between items-center mb-4">
                <h2 class="text-2xl font-bold text-amber-400">Password Generator</h2>
                <button id="close-modal-btn" class="text-slate-400 hover:text-white text-3xl leading-none">×</button>
            </div>

            <!-- Generated Password Display -->
            <div class="bg-slate-900 p-4 rounded-lg mb-4 flex items-start min-h-[80px]">
                <span id="generated-password" class="text-xl font-mono text-white flex-grow">Click Generate...</span>
                <button id="copy-password-btn" class="ml-4 text-slate-400 hover:text-amber-400 flex-shrink-0"><i class="fas fa-copy"></i></button>
            </div>
            
            <!-- Strength Meter -->
            <div class="w-full bg-slate-700 rounded-full h-2.5 mb-2">
              <div id="strength-bar" class="bg-red-600 h-2.5 rounded-full strength-bar" style="width: 10%"></div>
            </div>
            <p id="strength-text" class="text-center text-sm text-slate-400 mb-6">Strength: Very Weak</p>

            <!-- Options -->
            <div class="space-y-4">
                <div>
                    <label for="length" class="flex justify-between font-semibold">Length: <span id="length-val">16</span></label>
                    <input id="length" type="range" min="6" max="32" value="16" class="w-full h-2 bg-slate-700 rounded-lg appearance-none cursor-pointer">
                </div>
                <div class="grid grid-cols-2 gap-4">
                    <label class="flex items-center"><input type="checkbox" id="uppercase" class="w-4 h-4" checked><span class="ml-2">Uppercase (A-Z)</span></label>
                    <label class="flex items-center"><input type="checkbox" id="lowercase" class="w-4 h-4" checked><span class="ml-2">Lowercase (a-z)</span></label>
                    <label class="flex items-center"><input type="checkbox" id="numbers" class="w-4 h-4" checked><span class="ml-2">Numbers (0-9)</span></label>
                    <label class="flex items-center"><input type="checkbox" id="symbols" class="w-4 h-4" checked><span class="ml-2">Symbols (!@#$)</span></label>
                </div>
                <button id="generate-btn" class="w-full bg-amber-600 hover:bg-amber-700 text-white font-bold py-3 rounded-lg transition">Generate New Password</button>
            </div>
        </div>
    </div>


    <script>
    document.addEventListener('DOMContentLoaded', () => {
        // DOM Elements
        const noteListEl = document.getElementById('note-list');
        const newNoteBtn = document.getElementById('new-note-btn');
        const deleteNoteBtn = document.getElementById('delete-note-btn');
        const downloadNoteBtn = document.getElementById('download-note-btn');
        const downloadAllBtn = document.getElementById('download-all-btn');
        const noteEditorEl = document.getElementById('note-editor');
        const welcomeScreenEl = document.getElementById('welcome-screen');
        const noteTitleEl = document.getElementById('note-title');
        const noteBodyEl = document.getElementById('note-body');

        // State
        let notes = [];
        let activeNoteId = null;

        // --- Core Note Functions ---
        const saveNotes = () => {
            updateButtonStates();
        };

        const renderNoteList = () => {
            noteListEl.innerHTML = '';
            if (notes.length === 0) {
                 noteListEl.innerHTML = `<p class="text-center text-slate-500 text-sm p-4">No notes yet. Create one!</p>`;
                 return;
            }
            
            const sortedNotes = [...notes].sort((a,b) => b.id - a.id);

            sortedNotes.forEach(note => {
                const noteItem = document.createElement('div');
                noteItem.dataset.id = note.id;
                noteItem.className = `p-3 rounded-lg cursor-pointer transition ${note.id === activeNoteId ? 'bg-green-600/30' : 'hover:bg-slate-700'}`;
                
                const title = document.createElement('h3');
                title.textContent = note.title || 'Untitled Note';
                title.className = 'font-bold text-white truncate';
                noteItem.appendChild(title);

                const excerpt = document.createElement('p');
                excerpt.textContent = note.body.substring(0, 40) + (note.body.length > 40 ? '...' : '');
                excerpt.className = 'text-sm text-slate-400 truncate';
                noteItem.appendChild(excerpt);

                noteItem.addEventListener('click', () => selectNote(note.id));
                noteListEl.appendChild(noteItem);
            });
        };

        const selectNote = (id) => {
            activeNoteId = id;
            const note = notes.find(n => n.id === id);
            if (note) {
                welcomeScreenEl.classList.add('hidden');
                noteEditorEl.classList.remove('hidden');
                noteTitleEl.value = note.title;
                noteBodyEl.value = note.body;
            }
            renderNoteList();
        };

        const createNewNote = () => {
            const newNote = {
                id: Date.now(),
                title: 'New Note',
                body: ''
            };
            notes.push(newNote);
            saveNotes();
            selectNote(newNote.id);
        };
        
        const deleteActiveNote = () => {
            if (!activeNoteId) return;
            if(confirm('Are you sure you want to delete this note? This action cannot be undone.')){
                notes = notes.filter(note => note.id !== activeNoteId);
                activeNoteId = null;
                saveNotes();
                noteEditorEl.classList.add('hidden');
                welcomeScreenEl.classList.remove('hidden');
                renderNoteList();
            }
        };

        const downloadActiveNote = () => {
            if (!activeNoteId) return;
            const note = notes.find(n => n.id === activeNoteId);
            if (!note) return;

            const content = `Title: ${note.title}\n\n---\n\n${note.body}`;
            const blob = new Blob([content], { type: 'text/plain;charset=utf-8' });
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            const filename = (note.title || 'Untitled Note').replace(/[^a-z0-9]/gi, '_').toLowerCase();
            
            a.href = url;
            a.download = `${filename}.txt`;
            document.body.appendChild(a);
            a.click();
            document.body.removeChild(a);
            URL.revokeObjectURL(url);
        };

        const downloadAllNotes = () => {
            if (notes.length === 0) {
                alert('There are no notes to download.');
                return;
            }

            const zip = new JSZip();

            notes.forEach(note => {
                const content = `Title: ${note.title}\n\n---\n\n${note.body}`;
                
                const filename = (note.title || 'Untitled Note').replace(/[^a-z0-9]/gi, '_').toLowerCase();
                
                zip.file(`${filename}_${note.id}.txt`, content);
            });

            zip.generateAsync({ type: "blob" })
                .then(function(blob) {
                    const url = URL.createObjectURL(blob);
                    const a = document.createElement('a');
                    a.href = url;
                    a.download = 'enigma-vault-notes.zip';
                    document.body.appendChild(a);
                    a.click();
                    document.body.removeChild(a);
                    URL.revokeObjectURL(url);
                });
        };

        const updateButtonStates = () => {
            if (notes.length === 0) {
                downloadAllBtn.disabled = true;
                downloadAllBtn.classList.add('opacity-50', 'cursor-not-allowed');
            } else {
                downloadAllBtn.disabled = false;
                downloadAllBtn.classList.remove('opacity-50', 'cursor-not-allowed');
            }
        };
        
        // Event Listeners for Notes
        newNoteBtn.addEventListener('click', createNewNote);
        deleteNoteBtn.addEventListener('click', deleteActiveNote);
        downloadNoteBtn.addEventListener('click', downloadActiveNote);
        downloadAllBtn.addEventListener('click', downloadAllNotes);

        noteTitleEl.addEventListener('input', () => {
            const note = notes.find(n => n.id === activeNoteId);
            if(note) {
                note.title = noteTitleEl.value;
                saveNotes();
                const noteInList = noteListEl.querySelector(`[data-id='${activeNoteId}'] h3`);
                if(noteInList) noteInList.textContent = note.title || 'Untitled Note';
            }
        });
        
        noteBodyEl.addEventListener('input', () => {
             const note = notes.find(n => n.id === activeNoteId);
            if(note) {
                note.body = noteBodyEl.value;
                saveNotes();
                const noteInList = noteListEl.querySelector(`[data-id='${activeNoteId}'] p`);
                if(noteInList) noteInList.textContent = note.body.substring(0, 40) + (note.body.length > 40 ? '...' : '');
            }
        });


        // --- Password Generator Logic ---
        const openModalBtn = document.getElementById('open-password-generator-btn');
        const closeModalBtn = document.getElementById('close-modal-btn');
        const modal = document.getElementById('password-generator-modal');
        const generateBtn = document.getElementById('generate-btn');
        const copyBtn = document.getElementById('copy-password-btn');

        const lengthSlider = document.getElementById('length');
        const lengthVal = document.getElementById('length-val');
        const uppercaseCheck = document.getElementById('uppercase');
        const lowercaseCheck = document.getElementById('lowercase');
        const numbersCheck = document.getElementById('numbers');
        const symbolsCheck = document.getElementById('symbols');
        const passwordEl = document.getElementById('generated-password');
        const strengthBar = document.getElementById('strength-bar');
        const strengthText = document.getElementById('strength-text');


        openModalBtn.addEventListener('click', () => modal.classList.remove('hidden'));
        closeModalBtn.addEventListener('click', () => modal.classList.add('hidden'));

        lengthSlider.addEventListener('input', (e) => {
            lengthVal.textContent = e.target.value;
        });

        copyBtn.addEventListener('click', () => {
            if (passwordEl.textContent.length > 0 && passwordEl.textContent !== 'Click Generate...') {
                navigator.clipboard.writeText(passwordEl.textContent);
                copyBtn.innerHTML = '<i class="fas fa-check text-green-500"></i>';
                setTimeout(() => {
                    copyBtn.innerHTML = '<i class="fas fa-copy"></i>';
                }, 1500);
            }
        });
        
        generateBtn.addEventListener('click', () => {
            const length = +lengthSlider.value;
            const hasUpper = uppercaseCheck.checked;
            const hasLower = lowercaseCheck.checked;
            const hasNumber = numbersCheck.checked;
            const hasSymbol = symbolsCheck.checked;

            passwordEl.textContent = generatePassword(hasUpper, hasLower, hasNumber, hasSymbol, length);
            updatePasswordStrength();
        });

        const generatePassword = (upper, lower, number, symbol, length) => {
            let generatedPassword = '';
            const typesCount = upper + lower + number + symbol;
            const typesArr = [{upper}, {lower}, {number}, {symbol}].filter(item => Object.values(item)[0]);
            
            if(typesCount === 0) return 'Select at least one option';
            
            for(let i=0; i<length; i++) {
                const funcName = Object.keys(typesArr[Math.floor(Math.random() * typesArr.length)])[0];
                generatedPassword += randomFunc[funcName]();
            }
            
            return generatedPassword.slice(0, length);
        }

        const randomFunc = {
            lower: () => String.fromCharCode(Math.floor(Math.random() * 26) + 97),
            upper: () => String.fromCharCode(Math.floor(Math.random() * 26) + 65),
            number: () => String.fromCharCode(Math.floor(Math.random() * 10) + 48),
            symbol: () => '!@#$%^&*(){}[]=<>/,.'.charAt(Math.floor(Math.random() * 20))
        };
        
        const updatePasswordStrength = () => {
            const password = passwordEl.textContent;
            let score = 0;
            if(password.length === 0 || password === 'Select at least one option') {
                 strengthText.textContent = `Strength: N/A`;
                 strengthBar.style.width = '0%';
                 return;
            }
            if (password.length > 10) score++;
            if (password.length > 15) score++;
            if (/[a-z]/.test(password) && /[A-Z]/.test(password)) score++;
            if (/\d/.test(password)) score++;
            if (/[^A-Za-z0-9]/.test(password)) score++;

            let strength = { text: 'Very Weak', color: 'bg-red-600', width: '10%' };
            if (score >= 5) strength = { text: 'Very Strong', color: 'bg-green-500', width: '100%' };
            else if (score === 4) strength = { text: 'Strong', color: 'bg-green-400', width: '80%' };
            else if (score === 3) strength = { text: 'Medium', color: 'bg-yellow-500', width: '60%' };
            else if (score >= 1) strength = { text: 'Weak', color: 'bg-orange-500', width: '35%' };

            strengthText.textContent = `Strength: ${strength.text}`;
            strengthBar.style.width = strength.width;
            strengthBar.className = `h-2.5 rounded-full strength-bar ${strength.color}`;
        };


        // --- Initial Load ---
        const init = () => {
            renderNoteList();
            updateButtonStates();
            lengthVal.textContent = lengthSlider.value; // Set initial slider value display
        };

        init();
    });
    </script>
</body>
</html>