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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>LinkNoteMaster Pro - Notes</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://unpkg.com/feather-icons"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
</head>
<body class="bg-gray-50 min-h-screen">
    <!-- Header -->
    <header class="bg-white shadow-sm border-b">
        <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
            <div class="flex justify-between items-center py-4">
                <div class="flex items-center space-x-4">
                    <a href="index.html" class="text-gray-600 hover:text-gray-900">
                        <i data-feather="arrow-left"></i>
                    </a>
                    <h1 class="text-2xl font-bold text-gray-900">LinkNoteMaster Pro</h1>
                </div>
                <button id="newNoteBtn" class="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-lg flex items-center space-x-2 transition-colors">
                    <i data-feather="plus"></i>
                    <span>New Note</span>
                </button>
            </div>
        </div>
    </header>

    <!-- Main Content -->
    <main class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
        <!-- Search and Filter -->
        <div class="mb-8">
            <div class="flex flex-col sm:flex-row gap-4">
                <div class="flex-1">
                    <div class="relative">
                        <input type="text" id="searchInput" placeholder="Search notes and links..." class="w-full pl-10 pr-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent">
                        <i data-feather="search" class="absolute left-3 top-3.5 text-gray-400"></i>
                    </div>
                </div>
                <div class="flex space-x-2">
                    <select id="filterSelect" class="border border-gray-300 rounded-lg px-4 py-3 focus:ring-2 focus:ring-blue-500 focus:border-transparent">
                        <option value="all">All Notes</option>
                        <option value="text">Text Only</option>
                        <option value="link">Links Only</option>
                        <option value="favorite">Favorites</option>
                    </select>
                </div>
            </div>
        </div>

        <!-- Notes Grid -->
        <div id="notesContainer" class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
            <!-- Notes will be dynamically added here -->
        </div>

        <!-- Empty State -->
        <div id="emptyState" class="text-center py-16 hidden">
            <i data-feather="file-text" class="w-16 h-16 text-gray-300 mx-auto mb-4"></i>
            <h3 class="text-lg font-medium text-gray-900 mb-2">No notes yet</h3>
            <p class="text-gray-500 mb-6">Create your first note to get started!</p>
            <button id="emptyNewNoteBtn" class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-3 rounded-lg transition-colors">
                Create Your First Note
            </button>
        </div>
    </main>

    <!-- Add/Edit Note Modal -->
    <div id="noteModal" class="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center p-4 z-50 hidden">
        <div class="bg-white rounded-xl shadow-2xl max-w-2xl w-full max-h-[90vh] overflow-hidden">
            <div class="flex justify-between items-center p-6 border-b">
                <h3 class="text-xl font-semibold" id="modalTitle">New Note</h3>
                <button id="closeModal" class="text-gray-400 hover:text-gray-600">
                    <i data-feather="x"></i>
                </button>
            </div>
            <div class="p-6">
                <form id="noteForm">
                    <div class="space-y-4">
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-2">Title</label>
                            <input type="text" id="noteTitle" class="w-full border border-gray-300 rounded-lg px-4 py-3 focus:ring-2 focus:ring-blue-500 focus:border-transparent" placeholder="Enter note title" required>
                        </div>
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-2">Content</label>
                            <textarea id="noteContent" rows="6" class="w-full border border-gray-300 rounded-lg px-4 py-3 focus:ring-2 focus:ring-blue-500 focus:border-transparent" placeholder="Enter your note content..."></textarea>
                        </div>
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-2">Link (Optional)</label>
                            <input type="url" id="noteLink" class="w-full border border-gray-300 rounded-lg px-4 py-3 focus:ring-2 focus:ring-blue-500 focus:border-transparent" placeholder="https://example.com">
                        </div>
                        <div class="flex items-center justify-between">
                            <div class="flex items-center space-x-4">
                                <label class="flex items-center">
                                    <input type="checkbox" id="noteFavorite" class="rounded border-gray-300 text-blue-600 focus:ring-blue-500">
                                    <span class="ml-2 text-sm text-gray-700">Mark as favorite</span>
                                </label>
                                <label class="flex items-center">
                                    <input type="checkbox" id="notePrivate" class="rounded border-gray-300 text-blue-600 focus:ring-blue-500">
                                    <span class="ml-2 text-sm text-gray-700">Private note</span>
                                </label>
                            </div>
                            <div class="flex space-x-3">
                                <button type="button" id="cancelNote" class="px-4 py-2 border border-gray-300 rounded-lg text-gray-700 hover:bg-gray-50 transition-colors">
                                    Cancel
                                </button>
                                <button type="submit" class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-2 rounded-lg transition-colors">
                                    Save Note
                                </button>
                            </div>
                        </div>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <script>
        // Notes data structure
        let notes = JSON.parse(localStorage.getItem('notes')) || [];
        let currentEditingId = null;

        // DOM Elements
        const notesContainer = document.getElementById('notesContainer');
        const emptyState = document.getElementById('emptyState');
        const noteModal = document.getElementById('noteModal');
        const noteForm = document.getElementById('noteForm');
        const searchInput = document.getElementById('searchInput');
        const filterSelect = document.getElementById('filterSelect');

        // Initialize
        document.addEventListener('DOMContentLoaded', function() {
            feather.replace();
            renderNotes();
            setupEventListeners();
        });

        function setupEventListeners() {
            // New note buttons
            document.getElementById('newNoteBtn').addEventListener('click', () => openModal());
            document.getElementById('emptyNewNoteBtn').addEventListener('click', () => openModal());
            
            // Modal controls
            document.getElementById('closeModal').addEventListener('click', () => closeModal());
            document.getElementById('cancelNote').addEventListener('click', () => closeModal());
            
            // Form submission
            noteForm.addEventListener('submit', handleNoteSubmit);
            
            // Search and filter
            searchInput.addEventListener('input', renderNotes);
            filterSelect.addEventListener('change', renderNotes);
        }

        function openModal(note = null) {
            currentEditingId = note ? note.id : null;
            document.getElementById('modalTitle').textContent = note ? 'Edit Note' : 'New Note';
            document.getElementById('noteTitle').value = note ? note.title : '';
            document.getElementById('noteContent').value = note ? note.content : '';
            document.getElementById('noteLink').value = note ? note.link || '' : '';
            document.getElementById('noteFavorite').checked = note ? note.favorite : false;
            document.getElementById('notePrivate').checked = note ? note.private : false;
            noteModal.classList.remove('hidden');
        }

        function closeModal() {
            noteModal.classList.add('hidden');
            currentEditingId = null;
            noteForm.reset();
        }

        function handleNoteSubmit(e) {
            e.preventDefault();
            
            const noteData = {
                id: currentEditingId || Date.now().toString(),
                title: document.getElementById('noteTitle').value,
                content: document.getElementById('noteContent').value,
                link: document.getElementById('noteLink').value,
                favorite: document.getElementById('noteFavorite').checked,
                private: document.getElementById('notePrivate').checked,
                createdAt: currentEditingId ? notes.find(n => n.id === currentEditingId).createdAt : new Date().toISOString(),
                updatedAt: new Date().toISOString()
            };

            if (currentEditingId) {
                const index = notes.findIndex(n => n.id === currentEditingId);
                notes[index] = noteData;
            } else {
                notes.unshift(noteData);
            }

            saveNotes();
            renderNotes();
            closeModal();
        }

        function saveNotes() {
            localStorage.setItem('notes', JSON.stringify(notes));
        }

        function renderNotes() {
            const searchTerm = searchInput.value.toLowerCase();
            const filter = filterSelect.value;

            let filteredNotes = notes.filter(note => {
                const matchesSearch = note.title.toLowerCase().includes(searchTerm) || 
                                    note.content.toLowerCase().includes(searchTerm) ||
                                    (note.link && note.link.toLowerCase().includes(searchTerm));
                
                if (filter === 'text') return matchesSearch && !note.link;
                if (filter === 'link') return matchesSearch && note.link;
                if (filter === 'favorite') return matchesSearch && note.favorite;
                return matchesSearch;
            });

            if (filteredNotes.length === 0) {
                notesContainer.classList.add('hidden');
                emptyState.classList.remove('hidden');
                return;
            }

            notesContainer.classList.remove('hidden');
            emptyState.classList.add('hidden');

            notesContainer.innerHTML = filteredNotes.map(note => `
                <div class="bg-white rounded-xl shadow-sm border border-gray-200 hover:shadow-md transition-shadow overflow-hidden">
                    <div class="p-6">
                        <div class="flex justify-between items-start mb-3">
                            <h3 class="font-semibold text-gray-900 text-lg truncate">${note.title}</h3>
                            <div class="flex space-x-1">
                                ${note.favorite ? '<i data-feather="star" class="w-4 h-4 text-yellow-500 fill-current"></i>' : ''}
                                ${note.private ? '<i data-feather="lock" class="w-4 h-4 text-gray-400"></i>' : ''}
                            </div>
                        </div>
                        
                        <p class="text-gray-600 text-sm mb-4 line-clamp-3">${note.content}</p>
                        
                        ${note.link ? `
                            <div class="mb-4">
                                <a href="${note.link}" target="_blank" class="text-blue-600 hover:text-blue-800 text-sm truncate block">
                                    <i data-feather="link" class="w-3 h-3 inline mr-1"></i>
                                    ${note.link}
                                </a>
                            </div>
                        ` : ''}
                        
                        <div class="flex justify-between items-center text-xs text-gray-500">
                            <span>${new Date(note.updatedAt).toLocaleDateString()}</span>
                            <div class="flex space-x-2">
                                <button onclick="editNote('${note.id}')" class="text-gray-400 hover:text-blue-600 transition-colors">
                                    <i data-feather="edit-2" class="w-4 h-4"></i>
                                </button>
                                <button onclick="deleteNote('${note.id}')" class="text-gray-400 hover:text-red-600 transition-colors">
                                    <i data-feather="trash-2" class="w-4 h-4"></i>
                                </button>
                            </div>
                        </div>
                    </div>
                </div>
            `).join('');

            feather.replace();
        }

        function editNote(id) {
            const note = notes.find(n => n.id === id);
            if (note) openModal(note);
        }

        function deleteNote(id) {
            if (confirm('Are you sure you want to delete this note?')) {
                notes = notes.filter(note => note.id !== id);
                saveNotes();
                renderNotes();
            }
        }

        // Make functions globally available for onclick handlers
        window.editNote = editNote;
        window.deleteNote = deleteNote;
    </script>
</body>
</html>