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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>ZenPomo Pro - Ultimate Productivity Timer</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        /* Custom CSS (for parts not covered by Tailwind) */
        @keyframes float {
            0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.6; }
            25% { transform: translate(15px, 10px) scale(1.1); opacity: 0.8; }
            50% { transform: translate(-10px, 15px) scale(0.9); opacity: 0.5; }
            75% { transform: translate(5px, -10px) scale(1.05); opacity: 0.7; }
        }
        
        .timer-animation .circle {
            animation: float 15s infinite ease-in-out;
            background: rgba(108, 92, 231, 0.05);
        }
        
        .progress-bar {
            transition: width 0.5s ease, background-color 0.5s ease;
        }
        
        .task-item:hover .task-actions {
            opacity: 1;
        }
        
        .modal {
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0s 0.3s linear;
        }
        
        .modal.open {
            opacity: 1;
            visibility: visible;
            transition: opacity 0.3s ease, visibility 0s linear;
        }
        
        .modal-content {
            transform: translateY(20px) scale(0.95);
            transition: transform 0.3s ease;
        }
        
        .modal.open .modal-content {
            transform: translateY(0) scale(1);
        }
        
        .notification {
            transform: translateX(calc(100% + 20px));
            opacity: 0;
            transition: transform 0.4s ease, opacity 0.4s ease;
        }
        
        .notification.show {
            transform: translateX(0);
            opacity: 1;
        }
        
        .settings-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease;
        }
        
        .settings-content.open {
            max-height: 600px;
        }
        
        .tab-content {
            display: none;
        }
        
        .tab-content.active {
            display: block;
        }
        
        /* Custom task scrollbar */
        .task-list::-webkit-scrollbar {
            width: 6px;
        }
        
        .task-list::-webkit-scrollbar-track {
            background: #e9ecef;
            border-radius: 10px;
        }
        
        .task-list::-webkit-scrollbar-thumb {
            background: #a29bfe;
            border-radius: 10px;
        }
        
        .task-list::-webkit-scrollbar-thumb:hover {
            background: #6c5ce7;
        }
        
        /* Disable selection on timer and buttons */
        .timer-display, button {
            user-select: none;
            -webkit-user-select: none;
            -moz-user-select: none;
            -ms-user-select: none;
        }
        
        /* Sound wave animation when timer running */
        .sound-wave {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 3px;
            height: 30px;
        }
        
        .sound-wave div {
            width: 3px;
            height: 10px;
            background-color: #6c5ce7;
            animation: sound-wave 1.5s infinite ease-in-out;
        }
        
        .sound-wave div:nth-child(1) { animation-delay: 0s; }
        .sound-wave div:nth-child(2) { animation-delay: 0.2s; }
        .sound-wave div:nth-child(3) { animation-delay: 0.4s; }
        .sound-wave div:nth-child(4) { animation-delay: 0.6s; }
        .sound-wave div:nth-child(5) { animation-delay: 0.8s; }
        
        @keyframes sound-wave {
            0%, 100% { height: 10px; background-color: #6c5ce7; }
            25% { height: 30px; background-color: #a29bfe; }
            50% { height: 15px; background-color: #5649c5; }
            75% { height: 25px; background-color: #8476f9; }
        }
    </style>
</head>
<body class="bg-gradient-to-br from-gray-50 to-gray-200 min-h-screen flex flex-col text-gray-800">
    <!-- Header -->
    <header class="bg-white shadow-md py-4 px-6 sticky top-0 z-50 flex flex-col sm:flex-row items-center justify-between gap-4">
        <a href="#" class="flex items-center gap-3 text-2xl font-bold text-purple-600 no-underline">
            <i class="fas fa-clock text-3xl"></i>
            <span>ZenPomo Pro</span>
        </a>
        
        <nav class="flex-1">
            <ul class="flex flex-wrap justify-center gap-2 sm:gap-4">
                <li><a href="#" class="flex items-center gap-1.5 px-3 py-2 rounded-full transition-all bg-purple-100 text-purple-600"><i class="fas fa-home"></i> <span>Home</span></a></li>
                <li><a href="#" id="nav-stats" class="flex items-center gap-1.5 px-3 py-2 rounded-full transition-all hover:bg-gray-100 hover:text-purple-600"><i class="fas fa-chart-line"></i> <span>Stats</span></a></li>
                <li><a href="#" id="nav-tasks" class="flex items-center gap-1.5 px-3 py-2 rounded-full transition-all hover:bg-gray-100 hover:text-purple-600"><i class="fas fa-tasks"></i> <span>Tasks</span></a></li>
                <li><a href="#" id="nav-settings" class="flex items-center gap-1.5 px-3 py-2 rounded-full transition-all hover:bg-gray-100 hover:text-purple-600"><i class="fas fa-cog"></i> <span>Settings</span></a></li>
            </ul>
        </nav>
        
        <div class="flex gap-3">
            <button class="flex items-center gap-2 px-4 py-2 rounded-full border-2 border-purple-600 text-purple-600 font-semibold transition-all hover:bg-purple-50 hover:shadow-sm">
                <i class="fas fa-user"></i>
                <span>Sign In</span>
            </button>
            <button class="flex items-center gap-2 px-4 py-2 rounded-full bg-purple-600 text-white font-semibold transition-all hover:bg-purple-700 hover:shadow-md">
                <i class="fas fa-rocket"></i>
                <span>Upgrade</span>
            </button>
        </div>
    </header>

    <!-- Main Content -->
    <main class="flex-1 p-4 max-w-7xl mx-auto w-full">
        <div class="grid grid-cols-1 lg:grid-cols-2 gap-6">
            <!-- Pomodoro Timer Card -->
            <div class="bg-white rounded-2xl shadow-lg p-6 relative overflow-hidden">
                <!-- Decorative background circles -->
                <div class="timer-animation absolute inset-0 pointer-events-none overflow-hidden">
                    <div class="circle absolute rounded-full" style="width: 100px; height: 100px; top: 10%; left: 20%; animation-delay: 0s;"></div>
                    <div class="circle absolute rounded-full" style="width: 150px; height: 150px; top: 60%; left: 70%; animation-delay: 2s;"></div>
                    <div class="circle absolute rounded-full" style="width: 80px; height: 80px; top: 30%; left: 50%; animation-delay: 4s;"></div>
                </div>
                
                <!-- Card Header -->
                <header class="flex justify-between items-center mb-6 relative z-10">
                    <h2 class="text-xl font-bold text-purple-600 flex items-center gap-2">
                        <i class="fas fa-stopwatch"></i>
                        <span>Pomodoro Timer</span>
                    </h2>
                    <div class="flex gap-2">
                        <button id="stats-btn" class="w-9 h-9 rounded-full flex items-center justify-center border-2 border-purple-600 text-purple-600 hover:bg-purple-100 transition-all" title="View Stats">
                            <i class="fas fa-chart-pie"></i>
                        </button>
                        <button id="fullscreen-btn" class="w-9 h-9 rounded-full flex items-center justify-center border-2 border-purple-600 text-purple-600 hover:bg-purple-100 transition-all" title="Fullscreen">
                            <i class="fas fa-expand"></i>
                        </button>
                    </div>
                </header>
                
                <!-- Mode Indicator -->
                <div class="flex justify-center mb-6 relative z-10">
                    <div id="mode-text" class="px-5 py-3 rounded-full font-semibold flex items-center gap-2 bg-purple-100 text-purple-600">
                        <i class="fas fa-bolt"></i>
                        <span>Focus</span>
                    </div>
                </div>
                
                <!-- Timer Display -->
                <div id="timer" class="text-7xl md:text-8xl font-bold text-center my-8 text-purple-600 font-mono transition-colors">25:00</div>
                
                <!-- Progress Bar -->
                <div class="w-full h-2.5 bg-gray-200 rounded-full mb-8 overflow-hidden">
                    <div id="progress-bar" class="h-full bg-purple-600 w-0"></div>
                </div>
                
                <!-- Controls -->
                <div class="flex flex-wrap justify-center gap-3 mb-8 relative z-10">
                    <button id="start-btn" class="px-6 py-3 rounded-full bg-purple-600 text-white font-semibold flex items-center gap-2 hover:bg-purple-700 hover:shadow-md transition-all">
                        <i class="fas fa-play"></i>
                        <span>Start</span>
                    </button>
                    <button id="pause-btn" disabled class="px-6 py-3 rounded-full bg-green-500 text-white font-semibold flex items-center gap-2 hover:bg-green-600 hover:shadow-md transition-all">
                        <i class="fas fa-pause"></i>
                        <span>Pause</span>
                    </button>
                    <button id="reset-btn" disabled class="px-6 py-3 rounded-full bg-pink-500 text-white font-semibold flex items-center gap-2 hover:bg-pink-600 hover:shadow-md transition-all">
                        <i class="fas fa-redo"></i>
                        <span>Reset</span>
                    </button>
                    <button id="skip-to-break-btn" class="hidden px-6 py-3 rounded-full bg-yellow-400 text-gray-800 font-semibold flex items-center gap-2 hover:bg-yellow-500 hover:shadow-md transition-all" title="Skip to next break">
                        <i class="fas fa-forward"></i>
                        <span>Skip</span>
                    </button>
                </div>
                
                <!-- Activity status -->
                <div id="activity-status" class="flex items-center justify-center gap-2 mb-4 text-purple-600">
                    <div class="sound-wave hidden">
                        <div></div>
                        <div></div>
                        <div></div>
                        <div></div>
                        <div></div>
                    </div>
                    <span id="status-text" class="text-sm">Timer idle</span>
                </div>
                
                <!-- Settings Toggle -->
                <div class="flex justify-center mb-4 relative z-10">
                    <button id="toggle-settings" class="px-4 py-2 rounded-full border-2 border-purple-600 text-purple-600 font-medium flex items-center gap-2 hover:bg-purple-50 transition-all">
                        <i class="fas fa-sliders-h"></i>
                        <span>Timer Settings</span>
                    </button>
                </div>
                
                <!-- Settings Content -->
                <div id="settings-content" class="overflow-hidden">
                    <div class="space-y-4 mb-4">
                        <div>
                            <label for="work-duration" class="block mb-2 font-medium flex items-center gap-2">
                                <i class="fas fa-briefcase text-purple-600"></i>
                                <span>Work Duration (minutes)</span>
                            </label>
                            <input type="number" id="work-duration" min="1" max="120" value="25" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                        </div>
                        
                        <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
                            <div>
                                <label for="break-duration" class="block mb-2 font-medium flex items-center gap-2">
                                    <i class="fas fa-coffee text-pink-500"></i>
                                    <span>Short Break (minutes)</span>
                                </label>
                                <input type="number" id="break-duration" min="1" max="30" value="5" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                            </div>
                            <div>
                                <label for="long-break-duration" class="block mb-2 font-medium flex items-center gap-2">
                                    <i class="fas fa-umbrella-beach text-green-500"></i>
                                    <span>Long Break (minutes)</span>
                                </label>
                                <input type="number" id="long-break-duration" min="1" max="60" value="15" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                            </div>
                        </div>
                        
                        <div>
                            <label for="pomodoros-before-long-break" class="block mb-2 font-medium flex items-center gap-2">
                                <i class="fas fa-layer-group text-purple-600"></i>
                                <span>Pomodoros Before Long Break</span>
                            </label>
                            <input type="number" id="pomodoros-before-long-break" min="1" max="10" value="4" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                        </div>
                        
                        <div>
                            <label for="auto-start" class="block mb-2 font-medium flex items-center gap-2">
                                <i class="fas fa-magic text-purple-600"></i>
                                <span>Auto Start Next Round</span>
                            </label>
                            <select id="auto-start" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                                <option value="false">Disabled</option>
                                <option value="true">Enabled</option>
                            </select>
                        </div>
                        
                        <div>
                            <label for="timer-sound" class="block mb-2 font-medium flex items-center gap-2">
                                <i class="fas fa-volume-up text-purple-600"></i>
                                <span>Timer Sound</span>
                            </label>
                            <select id="timer-sound" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                                <option value="bell">Classic Bell</option>
                                <option value="chime">Soft Chime</option>
                                <option value="digital">Digital Beep</option>
                                <option value="nature">Nature Sounds</option>
                                <option value="none">No Sound</option>
                            </select>
                        </div>
                        
                        <div>
                            <label for="dark-mode" class="block mb-2 font-medium flex items-center gap-2">
                                <i class="fas fa-moon text-purple-600"></i>
                                <span>Theme</span>
                            </label>
                            <select id="dark-mode" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                                <option value="light">Light</option>
                                <option value="dark">Dark</option>
                                <option value="system">System Default</option>
                            </select>
                        </div>
                    </div>
                    
                    <button id="apply-settings-btn" class="w-full px-4 py-3 rounded-full bg-purple-600 text-white font-semibold flex items-center justify-center gap-2 hover:bg-purple-700 hover:shadow-md transition-all">
                        <i class="fas fa-check"></i>
                        <span>Apply Settings</span>
                    </button>
                </div>
                
                <!-- Stats Section -->
                <div class="flex gap-3 mt-6 relative z-10">
                    <div class="bg-white rounded-xl shadow-sm p-4 text-center flex-1">
                        <div id="today-pomodoros" class="text-2xl font-bold text-purple-600">0</div>
                        <div class="text-sm text-gray-500">Today</div>
                    </div>
                    <div class="bg-white rounded-xl shadow-sm p-4 text-center flex-1">
                        <div id="week-pomodoros" class="text-2xl font-bold text-purple-600">0</div>
                        <div class="text-sm text-gray-500">This Week</div>
                    </div>
                    <div class="bg-white rounded-xl shadow-sm p-4 text-center flex-1">
                        <div id="total-pomodoros" class="text-2xl font-bold text-purple-600">0</div>
                        <div class="text-sm text-gray-500">Total</div>
                    </div>
                </div>
            </div>
            
            <!-- Task Manager Card -->
            <div class="bg-white rounded-2xl shadow-lg p-6 flex flex-col h-full">
                <!-- Card Header -->
                <header class="flex justify-between items-center mb-6">
                    <h2 class="text-xl font-bold text-purple-600 flex items-center gap-2">
                        <i class="fas fa-tasks"></i>
                        <span>Task Manager</span>
                    </h2>
                    <div class="flex gap-2">
                        <button id="clear-completed" class="w-9 h-9 rounded-full flex items-center justify-center border-2 border-purple-600 text-purple-600 hover:bg-purple-100 transition-all" title="Clear Completed Tasks">
                            <i class="fas fa-check-double"></i>
                        </button>
                        <button id="add-task-modal" class="w-9 h-9 rounded-full flex items-center justify-center bg-purple-600 text-white hover:bg-purple-700 transition-all" title="Add New Task">
                            <i class="fas fa-plus"></i>
                        </button>
                    </div>
                </header>
                
                <!-- Quick Task Input -->
                <div class="flex mb-6">
                    <input type="text" id="new-task" placeholder="Add a quick task..." class="flex-1 px-4 py-3 rounded-l-xl border border-gray-300 focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all border-r-0">
                    <button id="add-task" class="px-4 py-3 rounded-r-xl bg-purple-600 text-white font-medium hover:bg-purple-700 transition-all">
                        <i class="fas fa-plus"></i>
                        <span class="hidden sm:inline">Add</span>
                    </button>
                </div>
                
                <!-- Task Categories -->
                <div class="flex flex-wrap gap-2 mb-6">
                    <button class="px-3 py-1.5 rounded-full font-medium transition-all bg-purple-600 text-white" data-category="all">All</button>
                    <button class="px-3 py-1.5 rounded-full font-medium transition-all bg-gray-200 hover:bg-gray-300" data-category="work">Work</button>
                    <button class="px-3 py-1.5 rounded-full font-medium transition-all bg-gray-200 hover:bg-gray-300" data-category="personal">Personal</button>
                    <button class="px-3 py-1.5 rounded-full font-medium transition-all bg-gray-200 hover:bg-gray-300" data-category="study">Study</button>
                    <button class="px-3 py-1.5 rounded-full font-medium transition-all bg-gray-200 hover:bg-gray-300" data-category="other">Other</button>
                </div>
                
                <!-- Task List -->
                <ul id="task-list" class="flex-1 overflow-y-auto max-h-96 mb-6">
                    <!-- Tasks will be rendered here -->
                </ul>
                
                <!-- Empty State -->
                <div id="empty-state" class="flex flex-col items-center justify-center py-12 text-center text-gray-500">
                    <i class="fas fa-clipboard-list text-6xl mb-4 text-gray-300"></i>
                    <p class="max-w-xs">No tasks yet. Add your first task to get started!</p>
                </div>
                
                <!-- Task Stats -->
                <div class="flex justify-between pt-4 border-t border-gray-200 text-sm text-gray-500">
                    <span id="total-tasks">0 tasks</span>
                    <span id="completed-tasks">0 completed</span>
                </div>
            </div>
        </div>
    </main>

    <!-- Task Modal -->
    <div class="modal fixed inset-0 bg-black bg-opacity-50 flex justify-center items-center z-50" id="task-modal">
        <div class="modal-content bg-white rounded-2xl shadow-xl w-full max-w-md max-h-[90vh] overflow-y-auto">
            <header class="p-6 border-b border-gray-200 flex justify-between items-center">
                <h3 id="modal-task-title" class="text-xl font-semibold text-gray-800">Add New Task</h3>
                <button id="close-modal" class="text-2xl text-gray-500 hover:text-gray-700 transition-all">&times;</button>
            </header>
            
            <div class="p-6 space-y-4">
                <input type="hidden" id="task-id-input">
                
                <div>
                    <label for="task-name" class="block mb-2 font-medium text-gray-700">Task Name</label>
                    <input type="text" id="task-name" placeholder="Enter task name" required class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                </div>
                
                <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
                    <div>
                        <label for="task-category" class="block mb-2 font-medium text-gray-700">Category</label>
                        <select id="task-category" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                            <option value="work">Work</option>
                            <option value="personal">Personal</option>
                            <option value="study">Study</option>
                            <option value="other">Other</option>
                        </select>
                    </div>
                    
                    <div>
                        <label for="task-priority" class="block mb-2 font-medium text-gray-700">Priority</label>
                        <select id="task-priority" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                            <option value="low">Low</option>
                            <option value="medium" selected>Medium</option>
                            <option value="high">High</option>
                        </select>
                    </div>
                </div>
                
                <div>
                    <label for="task-due-date" class="block mb-2 font-medium text-gray-700">Due Date (optional)</label>
                    <input type="date" id="task-due-date" class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all">
                </div>
                
                <div>
                    <label for="task-notes" class="block mb-2 font-medium text-gray-700">Notes (optional)</label>
                    <textarea id="task-notes" rows="3" placeholder="Add any additional notes..." class="w-full px-4 py-3 border border-gray-300 rounded-xl focus:border-purple-600 focus:ring-2 focus:ring-purple-200 outline-none transition-all"></textarea>
                </div>
            </div>
            
            <footer class="p-6 border-t border-gray-200 flex justify-end gap-3">
                <button id="cancel-task" class="px-5 py-2.5 rounded-full border-2 border-gray-300 text-gray-700 font-medium hover:bg-gray-100 transition-all">Cancel</button>
                <button id="save-task" class="px-5 py-2.5 rounded-full bg-purple-600 text-white font-medium hover:bg-purple-700 transition-all">Save Task</button>
            </footer>
        </div>
    </div>

    <!-- Stats Modal -->
    <div class="modal fixed inset-0 bg-black bg-opacity-50 flex justify-center items-center z-50" id="stats-modal">
        <div class="modal-content bg-white rounded-2xl shadow-xl w-full max-w-lg max-h-[90vh] overflow-y-auto">
            <header class="p-6 border-b border-gray-200 flex justify-between items-center">
                <h3 class="text-xl font-semibold text-gray-800 flex items-center gap-2">
                    <i class="fas fa-chart-pie text-purple-600"></i>
                    <span>Productivity Stats</span>
                </h3>
                <button id="close-stats-modal" class="text-2xl text-gray-500 hover:text-gray-700 transition-all">&times;</button>
            </header>
            
            <div class="p-6">
                <div class="border-b border-gray-200 mb-6">
                    <div class="flex gap-1">
                        <button class="tab px-4 py-2 font-medium relative" data-tab="history">History</button>
                        <button class="tab px-4 py-2 font-medium relative" data-tab="summary">Summary</button>
                    </div>
                </div>
                
                <div id="history-tab" class="tab-content active">
                    <h4 class="text-lg font-medium mb-4 text-gray-800">Recent Pomodoro Sessions</h4>
                    
                    <div id="history-list" class="max-h-60 overflow-y-auto">
                        <div id="history-empty-state" class="py-8 text-center text-gray-500">
                            No completed sessions yet.
                        </div>
                    </div>
                </div>
                
                <div id="summary-tab" class="tab-content">
                    <h4 class="text-lg font-medium mb-4 text-gray-800">Overall Summary</h4>
                    
                    <div class="space-y-4">
                        <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
                            <div class="stat-card bg-white rounded-xl shadow-sm p-4 text-center">
                                <div id="modal-today-pomodoros" class="text-2xl font-bold text-purple-600">0</div>
                                <div class="text-sm text-gray-500">Pomodoros Today</div>
                            </div>
                            <div class="stat-card bg-white rounded-xl shadow-sm p-4 text-center">
                                <div id="modal-week-pomodoros" class="text-2xl font-bold text-purple-600">0</div>
                                <div class="text-sm text-gray-500">Pomodoros This Week</div>
                            </div>
                        </div>
                        
                        <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
                            <div class="stat-card bg-white rounded-xl shadow-sm p-4 text-center">
                                <div id="modal-total-pomodoros" class="text-2xl font-bold text-purple-600">0</div>
                                <div class="text-sm text-gray-500">Total Pomodoros</div>
                            </div>
                            <div class="stat-card bg-white rounded-xl shadow-sm p-4 text-center">
                                <div id="modal-total-focus-time" class="text-2xl font-bold text-purple-600">0h 0m</div>
                                <div class="text-sm text-gray-500">Total Focus Time</div>
                            </div>
                        </div>
                        
                        <div class="stat-card bg-white rounded-xl shadow-sm p-4 text-center">
                            <div id="modal-current-streak" class="text-2xl font-bold text-purple-600">0 days</div>
                            <div class="text-sm text-gray-500">Current Streak</div>
                        </div>
                    </div>
                </div>
            </div>
            
            <footer class="p-6 border-t border-gray-200">
                <button id="reset-stats-btn" class="w-full px-4 py-2.5 rounded-full border-2 border-red-500 text-red-500 font-medium hover:bg-red-50 flex items-center justify-center gap-2 transition-all">
                    <i class="fas fa-trash-alt"></i>
                    <span>Reset All Stats</span>
                </button>
            </footer>
        </div>
    </div>

    <!-- Notification -->
    <div id="notification" class="fixed bottom-6 right-6 bg-white rounded-lg shadow-lg p-4 flex items-center gap-3 max-w-sm w-full border-l-4 hidden">
        <div class="notification-icon">
            <i class="fas fa-info-circle text-blue-500 text-xl"></i>
        </div>
        <div class="flex-1">
            <div id="notification-title" class="font-semibold">Info</div>
            <div id="notification-message" class="text-sm text-gray-600">Notification message</div>
        </div>
        <button id="close-notification" class="text-gray-500 hover:text-gray-700 transition-all">&times;</button>
    </div>

    <!-- Audio Elements -->
    <audio id="timer-end-sound" preload="auto"></audio>
    <audio id="break-start-sound" preload="auto"></audio>
    <audio id="work-start-sound" preload="auto"></audio>
    <audio id="task-complete-sound" preload="auto"></audio>
    <audio id="focus-alarm-sound" preload="auto"></audio>

    <script>
        document.addEventListener('DOMContentLoaded', function() {
            // --- Constants ---
            const SOUND_URLS = {
                bell: 'https://assets.mixkit.co/sfx/preview/mixkit-alarm-digital-clock-beep-989.mp3',
                chime: 'https://assets.mixkit.co/sfx/preview/mixkit-positive-interface-beep-221.mp3',
                digital: 'https://assets.mixkit.co/sfx/preview/mixkit-correct-answer-tone-2870.mp3',
                nature: 'https://assets.mixkit.co/sfx/preview/mixkit-forest-birds-singing-1238.mp3',
                none: ''
            };
            
            const PRIORITY_COLORS = {
                high: 'bg-red-500',
                medium: 'bg-yellow-400',
                low: 'bg-green-500'
            };
            
            // --- DOM Elements ---
            // Timer elements
            const timerDisplay = document.getElementById('timer');
            const startBtn = document.getElementById('start-btn');
            const pauseBtn = document.getElementById('pause-btn');
            const resetBtn = document.getElementById('reset-btn');
            const skipToBreakBtn = document.getElementById('skip-to-break-btn');
            const modeText = document.getElementById('mode-text');
            const progressBar = document.getElementById('progress-bar');
            const soundWave = document.querySelector('.sound-wave');
            const statusText = document.getElementById('status-text');
            const fullscreenBtn = document.getElementById('fullscreen-btn');
            const activityStatus = document.getElementById('activity-status');
            
            // Settings elements
            const workDurationInput = document.getElementById('work-duration');
            const breakDurationInput = document.getElementById('break-duration');
            const longBreakDurationInput = document.getElementById('long-break-duration');
            const pomodorosBeforeLongBreakInput = document.getElementById('pomodoros-before-long-break');
            const autoStartInput = document.getElementById('auto-start');
            const timerSoundInput = document.getElementById('timer-sound');
            const darkModeInput = document.getElementById('dark-mode');
            const toggleSettingsBtn = document.getElementById('toggle-settings');
            const settingsContent = document.getElementById('settings-content');
            const applySettingsBtn = document.getElementById('apply-settings-btn');
            
            // Stats elements
            const todayPomodorosDisplay = document.getElementById('today-pomodoros');
            const weekPomodorosDisplay = document.getElementById('week-pomodoros');
            const totalPomodorosDisplay = document.getElementById('total-pomodoros');
            
            // Task elements
            const newTaskInput = document.getElementById('new-task');
            const addTaskBtn = document.getElementById('add-task');
            const taskList = document.getElementById('task-list');
            const emptyState = document.getElementById('empty-state');
            const totalTasksSpan = document.getElementById('total-tasks');
            const completedTasksSpan = document.getElementById('completed-tasks');
            const clearCompletedBtn = document.getElementById('clear-completed');
            const categoryBtns = document.querySelectorAll('.category-btn');
            
            // Task modal elements
            const taskModal = document.getElementById('task-modal');
            const addTaskModalBtn = document.getElementById('add-task-modal');
            const closeModalBtn = document.getElementById('close-modal');
            const cancelTaskBtn = document.getElementById('cancel-task');
            const saveTaskBtn = document.getElementById('save-task');
            const modalTaskTitle = document.getElementById('modal-task-title');
            const taskNameInput = document.getElementById('task-name');
            const taskCategoryInput = document.getElementById('task-category');
            const taskPriorityInput = document.getElementById('task-priority');
            const taskDueDateInput = document.getElementById('task-due-date');
            const taskNotesInput = document.getElementById('task-notes');
            const taskIdInput = document.getElementById('task-id-input');
            
            // Stats modal elements
            const statsModal = document.getElementById('stats-modal');
            const statsBtn = document.getElementById('stats-btn');
            const closeStatsModalBtn = document.getElementById('close-stats-modal');
            const statsTabs = statsModal.querySelectorAll('.tab');
            const statsTabContents = statsModal.querySelectorAll('.tab-content');
            const historyList = document.getElementById('history-list');
            const historyEmptyState = document.getElementById('history-empty-state');
            const modalTodayPomodoros = document.getElementById('modal-today-pomodoros');
            const modalWeekPomodoros = document.getElementById('modal-week-pomodoros');
            const modalTotalPomodoros = document.getElementById('modal-total-pomodoros');
            const modalTotalFocusTime = document.getElementById('modal-total-focus-time');
            const modalCurrentStreak = document.getElementById('modal-current-streak');
            const resetStatsBtn = document.getElementById('reset-stats-btn');
            
            // Notification elements
            const notification = document.getElementById('notification');
            const notificationIcon = notification.querySelector('.notification-icon i');
            const notificationTitle = document.getElementById('notification-title');
            const notificationMessage = document.getElementById('notification-message');
            const closeNotificationBtn = document.getElementById('close-notification');
            
            // Audio elements
            const timerEndSound = document.getElementById('timer-end-sound');
            const breakStartSound = document.getElementById('break-start-sound');
            const workStartSound = document.getElementById('work-start-sound');
            const taskCompleteSound = document.getElementById('task-complete-sound');
            const focusAlarmSound = document.getElementById('focus-alarm-sound');
            
            // --- State Variables ---
            let timerInterval;
            let timeLeft;
            let totalSeconds;
            let isRunning = false;
            let currentMode = 'work';
            let pomodoroCount = 0;
            let settings = loadSettings();
            let tasks = loadTasks();
            let stats = loadStats();
            let currentTaskEditingId = null;
            let currentCategoryFilter = 'all';
            let notificationTimeout;
            let isFullscreen = false;
            
            // --- Initialization ---
            function initializeApp() {
                applySettingsToUI();
                updateSoundSources();
                resetTimer(true);
                renderTasks();
                updateTaskStats();
                updateStatsDisplay();
                updateButtonStates();
                checkDarkMode();
                
                // Initialize tooltips
                initializeTooltips();
                
                // Load sounds and try to unlock audio
                unlockAudio();
            }
            
            // --- Init Tooltips ---
            function initializeTooltips() {
                // Add event listeners for all elements with title attribute
                document.querySelectorAll('[title]').forEach(el => {
                    el.addEventListener('mouseenter', showTooltip);
                    el.addEventListener('mouseleave', hideTooltip);
                    el.addEventListener('focus', showTooltip);
                    el.addEventListener('blur', hideTooltip);
                });
            }
            
            function showTooltip(e) {
                const element = e.target;
                const tooltipText = element.getAttribute('title');
                
                if (!tooltipText) return;
                
                // Create tooltip if it doesn't exist
                let tooltip = element.querySelector('.custom-tooltip');
                if (!tooltip) {
                    tooltip = document.createElement('div');
                    tooltip.className = 'custom-tooltip absolute z-50 bg-gray-800 text-white text-xs px-2 py-1 rounded whitespace-nowrap pointer-events-none hidden';
                    element.appendChild(tooltip);
                }
                
                // Position tooltip
                tooltip.textContent = tooltipText;
                tooltip.classList.remove('hidden');
                
                const rect = element.getBoundingClientRect();
                tooltip.style.left = `${rect.left + rect.width/2 - tooltip.offsetWidth/2}px`;
                tooltip.style.top = `${rect.top - tooltip.offsetHeight - 5}px`;
                
                // Remove title to prevent default tooltip
                element.removeAttribute('title');
            }
            
            function hideTooltip(e) {
                const element = e.target;
                const tooltip = element.querySelector('.custom-tooltip');
                if (tooltip) {
                    tooltip.classList.add('hidden');
                }
            }
            
            // --- Settings Management ---
            function defaultSettings() {
                return {
                    workDuration: 25,
                    breakDuration: 5,
                    longBreakDuration: 15,
                    pomodorosBeforeLongBreak: 4,
                    autoStart: false,
                    timerSound: 'bell',
                    darkMode: 'system'
                };
            }
            
            function loadSettings() {
                const savedSettings = localStorage.getItem('zenpomoSettings');
                return { ...defaultSettings(), ...(savedSettings ? JSON.parse(savedSettings) : {}) };
            }
            
            function saveSettings() {
                localStorage.setItem('zenpomoSettings', JSON.stringify(settings));
                checkDarkMode(); // Update dark mode when settings change
            }
            
            function applySettingsToUI() {
                workDurationInput.value = settings.workDuration;
                breakDurationInput.value = settings.breakDuration;
                longBreakDurationInput.value = settings.longBreakDuration;
                pomodorosBeforeLongBreakInput.value = settings.pomodorosBeforeLongBreak;
                autoStartInput.value = settings.autoStart.toString();
                timerSoundInput.value = settings.timerSound;
                darkModeInput.value = settings.darkMode;
            }
            
            function checkDarkMode() {
                let darkMode = false;
                
                if (settings.darkMode === 'dark' || 
                    (settings.darkMode === 'system' && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
                    darkMode = true;
                }
                
                if (darkMode) {
                    document.documentElement.classList.add('dark');
                    document.body.classList.add('bg-gray-900');
                } else {
                    document.documentElement.classList.remove('dark');
                    document.body.classList.remove('bg-gray-900');
                }
            }
            
            function applySettings() {
                // Validate inputs
                const workDur = parseInt(workDurationInput.value);
                const breakDur = parseInt(breakDurationInput.value);
                const longBreakDur = parseInt(longBreakDurationInput.value);
                const pomBeforeLong = parseInt(pomodorosBeforeLongBreakInput.value);
                
                if (isNaN(workDur) || workDur < 1 || workDur > 120 ||
                    isNaN(breakDur) || breakDur < 1 || breakDur > 30 ||
                    isNaN(longBreakDur) || longBreakDur < 1 || longBreakDur > 60 ||
                    isNaN(pomBeforeLong) || pomBeforeLong < 1 || pomBeforeLong > 10) {
                    showNotification('Invalid Settings', 'Please enter valid numbers within allowed ranges.', 'error');
                    return;
                }
                
                // Update settings
                settings.workDuration = workDur;
                settings.breakDuration = breakDur;
                settings.longBreakDuration = longBreakDur;
                settings.pomodorosBeforeLongBreak = pomBeforeLong;
                settings.autoStart = autoStartInput.value === 'true';
                settings.timerSound = timerSoundInput.value;
                settings.darkMode = darkModeInput.value;
                
                saveSettings();
                updateSoundSources();
                
                if (!isRunning) {
                    resetTimer(true); // Update timer display without changing mode
                }
                
                showNotification('Settings Applied', 'New settings saved successfully.', 'success');
                settingsContent.classList.remove('open');
                toggleSettingsBtn.innerHTML = '<i class="fas fa-sliders-h"></i> <span>Timer Settings</span>';
            }
            
            function updateSoundSources() {
                timerEndSound.src = SOUND_URLS[settings.timerSound] || '';
                timerEndSound.load();
                breakStartSound.load();
                workStartSound.load();
                
                // Preload task complete sound
                taskCompleteSound.src = 'https://assets.mixkit.co/sfx/preview/mixkit-achievement-bell-600.mp3';
                taskCompleteSound.load();
                
                // Preload focus alarm sound
                focusAlarmSound.src = 'https://assets.mixkit.co/sfx/preview/mixkit-alarm-clock-beep-1103.mp3';
                focusAlarmSound.load();
            }
            
            // Unlock audio on iOS/devices that require user interaction
            function unlockAudio() {
                const playSilentAudio = () => {
                    const silentAudio = new Audio('data:audio/wav;base64,UklGRl9vT19XQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YU...');
                    silentAudio.volume = 0;
                    silentAudio.play().catch(e => console.log('Audio unlock attempt failed'));
                };
                
                document.addEventListener('click', function unlockOnce() {
                    playSilentAudio();
                    document.removeEventListener('click', unlockOnce);
                }, { once: true });
            }
            
            // --- Timer Logic ---
            function startTimer() {
                if (isRunning) return;
                
                // Sound preload attempt (helps with iOS/Android restrictions)
                try {
                    timerEndSound.load();
                    breakStartSound.load();
                    workStartSound.load();
                    const playPromise = timerEndSound.play();
                    if (playPromise !== undefined) {
                        playPromise.then(_ => {
                            timerEndSound.pause();
                            timerEndSound.currentTime = 0;
                        }).catch(e => {});
                    }
                } catch (e) {}
                
                isRunning = true;
                
                // Update total seconds based on current mode and settings
                switch (currentMode) {
                    case 'work': totalSeconds = settings.workDuration * 60; break;
                    case 'break': totalSeconds = settings.breakDuration * 60; break;
                    case 'longBreak': totalSeconds = settings.longBreakDuration * 60; break;
                }
                
                // Cap timeLeft if it exceeds new totalSeconds
                if (timeLeft > totalSeconds) timeLeft = totalSeconds;
                
                // Play appropriate sound
                if (currentMode === 'work') playSound(workStartSound);
                else playSound(breakStartSound);
                
                timerInterval = setInterval(updateTimer, 1000);
                updateButtonStates();
                
                // Show running indicator
                soundWave.classList.remove('hidden');
                statusText.textContent = `${currentMode === 'work' ? 'Focusing' : 'On break'}...`;
                activityStatus.classList.add('text-purple-600');
                
                // Show desktop notification if available
                if (Notification.permission === 'granted' && document.hidden) {
                    new Notification(`ZenPomo Pro - ${currentMode === 'work' ? 'Work' : 'Break'} Started`, {
                        body: `Timer started for ${formatMinutesSeconds(totalSeconds)}.`
                    });
                }
            }
            
            function pauseTimer() {
                if (!isRunning) return;
                
                clearInterval(timerInterval);
                isRunning = false;
                updateButtonStates();
                
                // Hide running indicator
                soundWave.classList.add('hidden');
                statusText.textContent = 'Timer paused';
                activityStatus.classList.remove('text-purple-600');
            }
            
            function resetTimer(preventModeSwitch = false) {
                clearInterval(timerInterval);
                isRunning = false;
                
                if (!preventModeSwitch) {
                    currentMode = 'work';
                    pomodoroCount = 0;
                    updateModeIndicator();
                }
                
                // Update time based on current mode and latest settings
                switch (currentMode) {
                    case 'work': timeLeft = settings.workDuration * 60; break;
                    case 'break': timeLeft = settings.breakDuration * 60; break;
                    case 'longBreak': timeLeft = settings.longBreakDuration * 60; break;
                    default: timeLeft = settings.workDuration * 60;
                }
                totalSeconds = timeLeft;
                
                updateTimerDisplay();
                updateProgressBar(true);
                updateButtonStates();
                
                // Hide running indicator
                soundWave.classList.add('hidden');
                statusText.textContent = 'Timer idle';
                activityStatus.classList.remove('text-purple-600');
            }
            
            function updateTimer() {
                if (timeLeft > 0) {
                    timeLeft--;
                    updateTimerDisplay();
                    updateProgressBar();
                    
                    // Alert when 1 minute remains
                    if (timeLeft === 60) {
                        playSound(focusAlarmSound);
                    }
                } else {
                    // Timer reached 0
                    clearInterval(timerInterval);
                    isRunning = false;
                    playSound(timerEndSound);
                    
                    // Determine next mode
                    let nextMode = 'work';
                    if (currentMode === 'work') {
                        pomodoroCount++;
                        recordPomodoroCompletion();
                        updateStatsDisplay();
                        
                        if (pomodoroCount >= settings.pomodorosBeforeLongBreak) {
                            nextMode = 'longBreak';
                            pomodoroCount = 0;
                        } else {
                            nextMode = 'break';
                        }
                    } else {
                        nextMode = 'work';
                    }
                    
                    // Switch mode
                    switchMode(nextMode);
                    
                    // Auto-start if enabled
                    if (settings.autoStart) {
                        setTimeout(startTimer, 500);
                    } else {
                        updateButtonStates();
                    }
                }
            }
            
            function skipToBreak() {
                if (currentMode !== 'work') return;
                
                clearInterval(timerInterval);
                isRunning = false;
                
                // Determine break type based on next pomodoro
                let nextBreakMode = pomodoroCount + 1 >= settings.pomodorosBeforeLongBreak ? 'longBreak' : 'break';
                
                showNotification('Work Skipped', `Starting ${nextBreakMode === 'longBreak' ? 'long break' : 'short break'}.`, 'info');
                switchMode(nextBreakMode);
                
                if (settings.autoStart) {
                    setTimeout(startTimer, 500);
                } else {
                    updateButtonStates();
                }
            }
            
            function switchMode(newMode) {
                currentMode = newMode;
                
                // Set time left based on new mode and current settings
                switch (newMode) {
                    case 'work': timeLeft = settings.workDuration * 60; break;
                    case 'break': timeLeft = settings.breakDuration * 60; break;
                    case 'longBreak': timeLeft = settings.longBreakDuration * 60; break;
                    default: timeLeft = settings.workDuration * 60;
                }
                totalSeconds = timeLeft;
                
                updateModeIndicator();
                updateTimerDisplay();
                updateProgressBar(true);
                updateButtonStates();
                
                // Update status text
                if (!isRunning) {
                    statusText.textContent = 'Timer idle';
                } else {
                    statusText.textContent = `${currentMode === 'work' ? 'Focusing' : 'On break'}...`;
                }
                
                // Request notification permission if needed
                if (Notification.permission !== 'granted' && Notification.permission !== 'denied') {
                    Notification.requestPermission().then(permission => {
                        console.log('Notification permission:', permission);
                    });
                }
                
                // Send desktop notification if enabled
                if (Notification.permission === 'granted' && document.hidden) {
                    new Notification(`ZenPomo Pro - ${newMode === 'work' ? 'Work' : 'Break'} Time!`, {
                        body: `It's time to ${newMode === 'work' ? 'focus' : 'take a break'}!`,
                    });
                }
            }
            
            function updateModeIndicator() {
                let modeClass = 'px-5 py-3 rounded-full font-semibold flex items-center gap-2 transition-colors';
                let progressColor = 'bg-purple-600';
                let icon, modeName;
                
                switch (currentMode) {
                    case 'work':
                        icon = 'fa-bolt';
                        modeName = 'Focus';
                        modeClass += ' bg-purple-100 text-purple-600';
                        break;
                    case 'break':
                        icon = 'fa-coffee';
                        modeName = 'Break';
                        modeClass += ' bg-pink-100 text-pink-500';
                        progressColor = 'bg-pink-500';
                        break;
                    case 'longBreak':
                        icon = 'fa-umbrella-beach';
                        modeName = 'Long Break';
                        modeClass += ' bg-green-100 text-green-500';
                        progressColor = 'bg-green-500';
                        break;
                }
                
                modeText.innerHTML = `<i class="fas ${icon}"></i> <span>${modeName}</span>`;
                modeText.className = modeClass;
                progressBar.className = progressColor;
            }
            
            function updateButtonStates() {
                if (isRunning) {
                    startBtn.disabled = true;
                    startBtn.innerHTML = '<i class="fas fa-play"></i> <span class="hidden sm:inline">Running...</span>';
                    pauseBtn.disabled = false;
                    resetBtn.disabled = false;
                    skipToBreakBtn.disabled = currentMode !== 'work';
                    skipToBreakBtn.classList.toggle('hidden', currentMode !== 'work');
                } else {
                    const isAtStart = timeLeft >= getCurrentPhaseTotalSeconds();
                    
                    startBtn.disabled = false;
                    startBtn.innerHTML = isAtStart ? 
                        '<i class="fas fa-play"></i> <span class="hidden sm:inline">Start</span>' : 
                        '<i class="fas fa-play"></i> <span class="hidden sm:inline">Resume</span>';
                    
                    pauseBtn.disabled = true;
                    resetBtn.disabled = isAtStart;
                    skipToBreakBtn.disabled = true;
                    skipToBreakBtn.classList.add('hidden');
                }
            }
            
            function getCurrentPhaseTotalSeconds() {
                switch (currentMode) {
                    case 'work': return settings.workDuration * 60;
                    case 'break': return settings.breakDuration * 60;
                    case 'longBreak': return settings.longBreakDuration * 60;
                    default: return 25 * 60;
                }
            }
            
            function updateTimerDisplay() {
                // Format time
                const minutes = Math.floor(timeLeft / 60);
                const seconds = timeLeft % 60;
                const displayTime = `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
                timerDisplay.textContent = displayTime;
                
                // Update document title
                const modeTitle = currentMode === 'work' ? 'Work' : currentMode === 'break' ? 'Short Break' : 'Long Break';
                document.title = `(${displayTime}) ${modeTitle} - ZenPomo Pro`;
                
                // Change color based on time and mode
                if (timeLeft <= 60 && timeLeft > 0) {
                    timerDisplay.className = 'text-red-500 text-7xl md:text-8xl font-bold text-center my-8 font-mono transition-colors';
                } else {
                    let colorClass;
                    switch (currentMode) {
                        case 'work': colorClass = 'text-purple-600'; break;
                        case 'break': colorClass = 'text-pink-500'; break;
                        case 'longBreak': colorClass = 'text-green-500'; break;
                    }
                    timerDisplay.className = `${colorClass} text-7xl md:text-8xl font-bold text-center my-8 font-mono transition-colors`;
                }
            }
            
            function updateProgressBar(reset = false) {
                if (reset || totalSeconds <= 0 || timeLeft > totalSeconds) {
                    progressBar.style.width = '0%';
                    return;
                }
                
                const currentTimeLeft = Math.max(0, Math.min(timeLeft, totalSeconds));
                const progress = totalSeconds > 0 ? ((totalSeconds - currentTimeLeft) / totalSeconds) * 100 : 0;
                progressBar.style.width = `${progress}%`;
            }
            
            function formatMinutesSeconds(seconds) {
                const mins = Math.floor(seconds / 60);
                const secs = seconds % 60;
                return `${mins} minute${mins !== 1 ? 's' : ''} ${secs} second${secs !== 1 ? 's' : ''}`;
            }
            
            function playSound(soundElement) {
                if ((!soundElement.src && soundElement !== taskCompleteSound) || 
                    (settings.timerSound === 'none' && soundElement !== taskCompleteSound)) {
                    return;
                }
                
                try {
                    soundElement.currentTime = 0;
                    const playPromise = soundElement.play();
                    
                    if (playPromise !== undefined) {
                        playPromise.then(_ => {
                            // console.log(`Sound ${soundElement.id} played`);
                        }).catch(error => {
                            console.error('Sound play failed:', error);
                        });
                    }
                } catch (error) {
                    console.error('Sound error:', error);
                }
            }
            
            // --- Task Management ---
            function loadTasks() {
                const saved = localStorage.getItem('zenpomoTasks');
                return saved ? JSON.parse(saved) : [];
            }
            
            function saveTasks() {
                localStorage.setItem('zenpomoTasks', JSON.stringify(tasks));
            }
            
            function addTask(taskData) {
                const newTask = {
                    id: taskData.id || Date.now(),
                    text: taskData.text,
                    category: taskData.category || 'other',
                    priority: taskData.priority || 'medium',
                    dueDate: taskData.dueDate || null,
                    notes: taskData.notes || '',
                    completed: taskData.completed || false,
                    createdAt: taskData.createdAt || new Date().toISOString()
                };
                
                tasks.push(newTask);
                saveTasks();
                renderTasks();
                updateTaskStats();
                scrollToTask(newTask.id);
                return newTask;
            }
            
            function updateTask(taskId, updatedData) {
                tasks = tasks.map(task => 
                    task.id === taskId ? { ...task, ...updatedData } : task
                );
                saveTasks();
                renderTasks();
                updateTaskStats();
                scrollToTask(taskId);
            }
            
            function deleteTask(taskId) {
                tasks = tasks.filter(task => task.id !== taskId);
                saveTasks();
                renderTasks();
                updateTaskStats();
                showNotification('Task Deleted', 'The task has been removed.', 'info');
            }
            
            function toggleTaskComplete(taskId) {
                let taskCompleted = false;
                
                tasks = tasks.map(task => {
                    if (task.id === taskId) {
                        taskCompleted = !task.completed;
                        return { ...task, completed: taskCompleted };
                    }
                    return task;
                });
                
                saveTasks();
                renderTasks();
                updateTaskStats();
                
                if (taskCompleted) {
                    playSound(taskCompleteSound);
                    showNotification('Task Completed!', 'Well done!', 'success');
                }
            }
            
            function clearCompletedTasks() {
                const completedCount = tasks.filter(t => t.completed).length;
                
                if (completedCount === 0) {
                    showNotification('No Completed Tasks', 'Nothing to clear.', 'info');
                    return;
                }
                
                tasks = tasks.filter(task => !task.completed);
                saveTasks();
                renderTasks();
                updateTaskStats();
                showNotification('Tasks Cleared', `${completedCount} completed task(s) removed.`, 'success');
            }
            
            function scrollToTask(taskId) {
                const taskElement = document.querySelector(`.task-item[data-id="${taskId}"]`);
                if (taskElement) {
                    taskElement.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
                    
                    // Add highlight effect
                    taskElement.classList.add('bg-yellow-50');
                    setTimeout(() => taskElement.classList.remove('bg-yellow-50'), 1000);
                }
            }
            
            function renderTasks() {
                // Filter by current category
                const filtered = tasks.filter(t => 
                    currentCategoryFilter === 'all' || t.category === currentCategoryFilter
                );
                
                // Sort: incomplete first, then by priority (high to low), then by creation date (newest first)
                filtered.sort((a, b) => 
                    (a.completed - b.completed) || 
                    ({ high: 1, medium: 2, low: 3 }[a.priority] - { high: 1, medium: 2, low: 3 }[b.priority]) || 
                    (new Date(b.createdAt) - new Date(a.createdAt))
                );
                
                taskList.innerHTML = '';
                
                if (filtered.length === 0) {
                    emptyState.classList.remove('hidden');
                    taskList.classList.add('hidden');
                } else {
                    emptyState.classList.add('hidden');
                    taskList.classList.remove('hidden');
                    
                    filtered.forEach(task => {
                        const isOverdue = task.dueDate && !task.completed && 
                                          new Date(task.dueDate + 'T00:00:00') < new Date().setHours(0,0,0,0);
                        
                        const formattedDueDate = task.dueDate ? 
                            new Date(task.dueDate + 'T00:00:00').toLocaleDateString(undefined, { 
                                year: 'numeric', 
                                month: 'short', 
                                day: 'numeric' 
                            }) : '';
                        
                        const taskItem = document.createElement('li');
                        taskItem.className = `task-item flex items-center p-4 bg-gray-50 rounded-xl mb-3 transition-all hover:translate-x-1 ${task.completed ? 'opacity-80 bg-gray-100' : ''}`;
                        taskItem.dataset.id = task.id;
                        
                        // Priority indicator
                        taskItem.innerHTML = `
                            <div class="priority-dot w-2 h-2 rounded-full mr-3 ${PRIORITY_COLORS[task.priority]}" title="Priority: ${task.priority}"></div>
                            <input type="checkbox" class="w-5 h-5 mr-3 cursor-pointer" ${task.completed ? 'checked' : ''}>
                            <div class="flex-1 overflow-hidden">
                                <span class="task-text block mb-1 ${task.completed ? 'line-through text-gray-500' : 'text-gray-800'}">${escapeHTML(task.text)}</span>
                                <div class="flex flex-wrap items-center gap-2 text-xs">
                                    ${task.category ? `<span class="task-category px-2 py-0.5 rounded-full bg-purple-100 text-purple-600">${task.category}</span>` : ''}
                                    ${formattedDueDate ? `
                                        <span class="flex items-center gap-1 ${isOverdue ? 'text-red-500 font-semibold' : 'text-gray-500'}">
                                            <i class="far fa-calendar-alt"></i>
                                            <span>${formattedDueDate} ${isOverdue ? '(Overdue)' : ''}</span>
                                        </span>` : ''}
                                    ${task.notes ? `<span class="flex items-center gap-1 text-gray-500"><i class="far fa-sticky-note"></i> <span>Has notes</span></span>` : ''}
                                </div>
                            </div>
                            <div class="task-actions flex gap-1 opacity-0 transition-opacity">
                                <button class="edit-btn w-7 h-7 rounded-full flex items-center justify-center hover:bg-gray-200 transition-all text-gray-500 hover:text-blue-500" title="Edit Task">
                                    <i class="far fa-edit"></i>
                                </button>
                                <button class="delete-btn w-7 h-7 rounded-full flex items-center justify-center hover:bg-gray-200 transition-all text-gray-500 hover:text-red-500" title="Delete Task">
                                    <i class="far fa-trash-alt"></i>
                                </button>
                            </div>
                        `;
                        
                        // Add event listeners
                        taskItem.querySelector('input[type="checkbox"]').addEventListener('change', () => toggleTaskComplete(task.id));
                        taskItem.querySelector('.edit-btn').addEventListener('click', (e) => {
                            e.stopPropagation();
                            openEditTaskModal(task.id);
                        });
                        taskItem.querySelector('.delete-btn').addEventListener('click', (e) => {
                            e.stopPropagation();
                            deleteTask(task.id);
                        });
                        
                        // Click anywhere on task to toggle (unless clicking buttons)
                        taskItem.addEventListener('click', (e) => {
                            if (!e.target.closest('button') && !e.target.closest('input[type="checkbox"]')) {
                                toggleTaskComplete(task.id);
                            }
                        });
                        
                        taskList.appendChild(taskItem);
                    });
                }
                
                updateTaskStats();
            }
            
            function updateTaskStats() {
                const total = tasks.length;
                const completed = tasks.filter(t => t.completed).length;
                totalTasksSpan.textContent = `${total} ${total === 1 ? 'task' : 'tasks'}`;
                completedTasksSpan.textContent = `${completed} completed`;
            }
            
            function handleAddQuickTask() {
                const text = newTaskInput.value.trim();
                if (!text) {
                    showNotification('Empty Task', 'Please enter task text.', 'error');
                    newTaskInput.focus();
                    return;
                }
                
                const category = currentCategoryFilter !== 'all' ? currentCategoryFilter : 'other';
                addTask({ text, category });
                newTaskInput.value = '';
                showNotification('Task Added', 'Quick task added successfully!', 'success');
            }
            
            // --- Task Modal Functions ---
            function openAddTaskModal() {
                currentTaskEditingId = null;
                modalTaskTitle.textContent = 'Add New Task';
                taskIdInput.value = '';
                taskNameInput.value = '';
                taskCategoryInput.value = currentCategoryFilter !== 'all' ? currentCategoryFilter : 'work';
                taskPriorityInput.value = 'medium';
                taskDueDateInput.value = '';
                taskNotesInput.value = '';
                taskModal.classList.add('open');
                taskNameInput.focus();
            }
            
            function openEditTaskModal(taskId) {
                const task = tasks.find(t => t.id === taskId);
                if (!task) return;
                
                currentTaskEditingId = taskId;
                modalTaskTitle.textContent = 'Edit Task';
                taskIdInput.value = task.id;
                taskNameInput.value = task.text;
                taskCategoryInput.value = task.category;
                taskPriorityInput.value = task.priority;
                taskDueDateInput.value = task.dueDate || '';
                taskNotesInput.value = task.notes || '';
                taskModal.classList.add('open');
                taskNameInput.focus();
            }
            
            function closeTaskModal() {
                taskModal.classList.remove('open');
                
                // Reset modal after animation
                setTimeout(() => {
                    currentTaskEditingId = null;
                    modalTaskTitle.textContent = 'Add New Task';
                    taskIdInput.value = '';
                    taskNameInput.value = '';
                    taskCategoryInput.value = 'work';
                    taskPriorityInput.value = 'medium';
                    taskDueDateInput.value = '';
                    taskNotesInput.value = '';
                }, 300);
            }
            
            function saveTaskFromModal() {
                const text = taskNameInput.value.trim();
                if (!text) {
                    showNotification('Error', 'Task name cannot be empty!', 'error');
                    taskNameInput.focus();
                    return;
                }
                
                const taskData = {
                    text,
                    category: taskCategoryInput.value,
                    priority: taskPriorityInput.value,
                    dueDate: taskDueDateInput.value || null,
                    notes: taskNotesInput.value.trim()
                };
                
                if (currentTaskEditingId) {
                    updateTask(currentTaskEditingId, taskData);
                    showNotification('Task Updated', 'Task details saved.', 'success');
                } else {
                    addTask(taskData);
                    showNotification('Task Added', 'New task created.', 'success');
                }
                
                closeTaskModal();
            }
            
            // --- Statistics Management ---
            function defaultStats() {
                return {
                    pomodoros: {},
                    totalPomodoros: 0,
                    streak: 0,
                    lastActivityDate: null,
                    lastResetDate: new Date().toISOString()
                };
            }
            
            function loadStats() {
                const saved = localStorage.getItem('zenpomoStats');
                let loaded = saved ? JSON.parse(saved) : defaultStats();
                loaded = { ...defaultStats(), ...loaded };
                
                // Ensure required properties exist
                if (!loaded.pomodoros) loaded.pomodoros = {};
                if (!loaded.totalPomodoros) loaded.totalPomodoros = 0;
                if (!loaded.lastActivityDate) loaded.lastActivityDate = null;
                
                // Update streak if needed
                updateStreak(loaded);
                
                return loaded;
            }
            
            function updateStreak(statsObj) {
                if (!statsObj.lastActivityDate) {
                    statsObj.streak = 0;
                    return;
                }
                
                const lastDate = new Date(statsObj.lastActivityDate);
                const today = new Date();
                const yesterday = new Date(today);
                yesterday.setDate(yesterday.getDate() - 1);
                
                // Reset streak if last activity was before yesterday
                if (lastDate.toDateString() !== today.toDateString() && 
                    lastDate.toDateString() !== yesterday.toDateString()) {
                    statsObj.streak = 0;
                }
            }
            
            function saveStats() {
                localStorage.setItem('zenpomoStats', JSON.stringify(stats));
            }
            
            function recordPomodoroCompletion() {
                const today = new Date();
                const dateStr = today.toISOString().split('T')[0];
                
                // Update count for today
                stats.pomodoros[dateStr] = (stats.pomodoros[dateStr] || 0) + 1;
                stats.totalPomodoros = (stats.totalPomodoros || 0) + 1;
                
                // Update streak
                const yesterday = new Date(today);
                yesterday.setDate(yesterday.getDate() - 1);
                const yesterdayStr = yesterday.toISOString().split('T')[0];
                
                if (!stats.lastActivityDate || 
                    stats.lastActivityDate === yesterdayStr || 
                    stats.lastActivityDate === dateStr) {
                    // Continue streak
                    stats.lastActivityDate = dateStr;
                    stats.streak = (stats.streak || 0) + 1;
                } else {
                    // Reset streak
                    stats.lastActivityDate = dateStr;
                    stats.streak = 1;
                }
                
                saveStats();
            }
            
            function getPomodorosForDate(dateStr) {
                return stats.pomodoros[dateStr] || 0;
            }
            
            function getPomodorosThisWeek() {
                const today = new Date();
                const startOfWeek = new Date(today);
                startOfWeek.setDate(startOfWeek.getDate() - startOfWeek.getDay()); // Sunday
                
                let count = 0;
                
                for (let i = 0; i < 7; i++) {
                    const date = new Date(startOfWeek);
                    date.setDate(date.getDate() + i);
                    const dateStr = date.toISOString().split('T')[0];
                    count += getPomodorosForDate(dateStr);
                }
                
                return count;
            }
            
            function getTotalFocusTime() {
                return (stats.totalPomodoros || 0) * settings.workDuration;
            }
            
            function updateStatsDisplay() {
                const todayStr = new Date().toISOString().split('T')[0];
                const todayCount = getPomodorosForDate(todayStr);
                const weekCount = getPomodorosThisWeek();
                const totalCount = stats.totalPomodoros || 0;
                
                // Format total focus time
                const totalMinutes = getTotalFocusTime();
                const hours = Math.floor(totalMinutes / 60);
                const minutes = totalMinutes % 60;
                
                // Update main display
                todayPomodorosDisplay.textContent = todayCount;
                weekPomodorosDisplay.textContent = weekCount;
                totalPomodorosDisplay.textContent = totalCount;
                
                // Update modal display
                modalTodayPomodoros.textContent = todayCount;
                modalWeekPomodoros.textContent = weekCount;
                modalTotalPomodoros.textContent = totalCount;
                modalTotalFocusTime.textContent = `${hours}h ${minutes}m`;
                modalCurrentStreak.textContent = `${stats.streak || 0} ${stats.streak === 1 ? 'day' : 'days'}`;
                
                renderHistoryList();
            }
            
            function renderHistoryList() {
                const sortedDates = Object.keys(stats.pomodoros)
                    .sort((a, b) => new Date(b) - new Date(a))
                    .slice(0, 20); // Show only recent 20 items
                
                historyList.innerHTML = '';
                
                if (sortedDates.length === 0) {
                    historyEmptyState.classList.remove('hidden');
                    return;
                }
                
                historyEmptyState.classList.add('hidden');
                
                sortedDates.forEach(dateStr => {
                    const count = stats.pomodoros[dateStr];
                    const date = new Date(dateStr + 'T00:00:00');
                    const formattedDate = date.toLocaleDateString(undefined, {
                        weekday: 'short',
                        year: 'numeric',
                        month: 'short',
                        day: 'numeric'
                    });
                    
                    const item = document.createElement('div');
                    item.className = 'history-item flex justify-between items-center px-4 py-3 border-b border-gray-200 last:border-b-0';
                    item.innerHTML = `
                        <span class="history-date font-medium">${formattedDate}</span>
                        <span class="history-count px-2 py-0.5 rounded-full bg-purple-100 text-purple-600 font-semibold">
                            ${count} ${count === 1 ? 'session' : 'sessions'}
                        </span>
                    `;
                    
                    historyList.appendChild(item);
                });
            }
            
            function resetAllStats() {
                if (confirm("Are you sure you want to reset ALL statistics? This cannot be undone.")) {
                    stats = defaultStats();
                    stats.lastResetDate = new Date().toISOString();
                    saveStats();
                    updateStatsDisplay();
                    showNotification('Stats Reset', 'All statistics have been cleared.', 'success');
                }
            }
            
            // --- Stats Modal Functions ---
            function openStatsModal() {
                updateStatsDisplay();
                statsModal.classList.add('open');
                activateStatsTab('history');
            }
            
            function closeStatsModal() {
                statsModal.classList.remove('open');
            }
            
            function activateStatsTab(tabId) {
                // Update tabs
                statsTabs.forEach(tab => {
                    tab.classList.toggle('text-purple-600', tab.dataset.tab === tabId);
                    tab.classList.toggle('border-b-2', tab.dataset.tab === tabId);
                    tab.classList.toggle('border-purple-600', tab.dataset.tab === tabId);
                });
                
                // Update content
                statsTabContents.forEach(content => {
                    content.classList.toggle('hidden', content.id !== `${tabId}-tab`);
                });
            }
            
            // --- Notifications ---
            function showNotification(title, message, type = 'info') {
                clearTimeout(notificationTimeout);
                
                // Set notification content
                notificationTitle.textContent = title;
                notificationMessage.textContent = message;
                
                // Set notification style
                notification.className = 'fixed bottom-6 right-6 bg-white rounded-lg shadow-lg p-4 flex items-center gap-3 max-w-sm w-full border-l-4';
                
                switch (type) {
                    case 'success':
                        notificationIcon.className = 'fas fa-check-circle text-green-500 text-xl';
                        notification.classList.add('border-green-500');
                        break;
                    case 'error':
                        notificationIcon.className = 'fas fa-times-circle text-red-500 text-xl';
                        notification.classList.add('border-red-500');
                        break;
                    case 'info':
                        notificationIcon.className = 'fas fa-info-circle text-blue-500 text-xl';
                        notification.classList.add('border-blue-500');
                        break;
                }
                
                // Show notification
                notification.classList.remove('hidden', 'opacity-0');
                notification.classList.add('show');
                
                // Auto-hide after 5 seconds
                notificationTimeout = setTimeout(() => {
                    notification.classList.remove('show');
                }, 5000);
            }
            
            function hideNotification() {
                clearTimeout(notificationTimeout);
                notification.classList.remove('show');
            }
            
            // --- Utility Functions ---
            function escapeHTML(str) {
                const div = document.createElement('div');
                div.textContent = str;
                return div.innerHTML;
            }
            
            // --- Fullscreen Mode ---
            function toggleFullscreen() {
                if (!document.fullscreenElement) {
                    document.documentElement.requestFullscreen().catch(err => {
                        console.error('Fullscreen error:', err);
                        showNotification('Fullscreen Error', 'Could not enter fullscreen mode.', 'error');
                    });
                    isFullscreen = true;
                } else {
                    if (document.exitFullscreen) {
                        document.exitFullscreen();
                        isFullscreen = false;
                    }
                }
            }
            
            // --- Event Listeners ---
            // Timer controls
            startBtn.addEventListener('click', startTimer);
            pauseBtn.addEventListener('click', pauseTimer);
            resetBtn.addEventListener('click', () => resetTimer(false));
            skipToBreakBtn.addEventListener('click', skipToBreak);
            fullscreenBtn.addEventListener('click', toggleFullscreen);
            
            // Settings
            applySettingsBtn.addEventListener('click', applySettings);
            toggleSettingsBtn.addEventListener('click', function() {
                settingsContent.classList.toggle('open');
                this.innerHTML = settingsContent.classList.contains('open') ? 
                    '<i class="fas fa-chevron-up"></i> <span>Hide Settings</span>' : 
                    '<i class="fas fa-sliders-h"></i> <span>Timer Settings</span>';
            });
            
            // Tasks
            addTaskBtn.addEventListener('click', handleAddQuickTask);
            newTaskInput.addEventListener('keypress', (e) => {
                if (e.key === 'Enter') handleAddQuickTask();
            });
            clearCompletedBtn.addEventListener('click', clearCompletedTasks);
            categoryBtns.forEach(btn => {
                btn.addEventListener('click', function() {
                    categoryBtns.forEach(b => {
                        b.classList.remove('bg-purple-600', 'text-white');
                        b.classList.add('bg-gray-200', 'hover:bg-gray-300');
                    });
                    this.classList.remove('bg-gray-200', 'hover:bg-gray-300');
                    this.classList.add('bg-purple-600', 'text-white');
                    currentCategoryFilter = this.dataset.category;
                    renderTasks();
                });
            });
            
            // Task modal
            addTaskModalBtn.addEventListener('click', openAddTaskModal);
            closeModalBtn.addEventListener('click', closeTaskModal);
            cancelTaskBtn.addEventListener('click', closeTaskModal);
            saveTaskBtn.addEventListener('click', saveTaskFromModal);
            taskModal.addEventListener('click', (e) => {
                if (e.target === taskModal) closeTaskModal();
            });
            
            // Stats modal
            statsBtn.addEventListener('click', openStatsModal);
            closeStatsModalBtn.addEventListener('click', closeStatsModal);
            statsModal.addEventListener('click', (e) => {
                if (e.target === statsModal) closeStatsModal();
            });
            resetStatsBtn.addEventListener('click', resetAllStats);
            
            // Tabs in stats modal
            statsTabs.forEach(tab => {
                tab.addEventListener('click', function() {
                    activateStatsTab(this.dataset.tab);
                });
            });
            
            // Notification
            closeNotificationBtn.addEventListener('click', hideNotification);
            
            // Navigation links
            document.getElementById('nav-stats')?.addEventListener('click', (e) => {
                e.preventDefault();
                statsBtn.click();
            });
            document.getElementById('nav-tasks')?.addEventListener('click', (e) => {
                e.preventDefault();
                document.querySelector('.todo-card').scrollIntoView({ behavior: 'smooth' });
            });
            document.getElementById('nav-settings')?.addEventListener('click', (e) => {
                e.preventDefault();
                document.querySelector('.pomodoro-card').scrollIntoView({ behavior: 'smooth' });
                if (!settingsContent.classList.contains('open')) {
                    toggleSettingsBtn.click();
                }
            });
            
            // Fullscreen change listener
            document.addEventListener('fullscreenchange', () => {
                isFullscreen = !!document.fullscreenElement;
                fullscreenBtn.innerHTML = isFullscreen ? 
                    '<i class="fas fa-compress"></i>' : 
                    '<i class="fas fa-expand"></i>';
                fullscreenBtn.title = isFullscreen ? 'Exit fullscreen' : 'Enter fullscreen';
            });
            
            // Page visibility change (for notifications)
            document.addEventListener('visibilitychange', () => {
                if (!document.hidden && isRunning) {
                    const modeName = currentMode === 'work' ? 'Work' : currentMode === 'break' ? 'Short Break' : 'Long Break';
                    showNotification('ZenPomo Pro Reminder', `${modeName} timer is running: ${timerDisplay.textContent} remaining`, 'info');
                }
            });
            
            // Initialize the app
            initializeApp();
        });
    </script>
<p style="border-radius: 8px; text-align: center; font-size: 12px; color: #fff; margin-top: 16px;position: fixed; left: 8px; bottom: 8px; z-index: 10; background: rgba(0, 0, 0, 0.8); padding: 4px 8px;">Made with <img src="https://enzostvs-deepsite.hf.space/logo.svg" alt="DeepSite Logo" style="width: 16px; height: 16px; vertical-align: middle;display:inline-block;margin-right:3px;filter:brightness(0) invert(1);"><a href="https://enzostvs-deepsite.hf.space" style="color: #fff;text-decoration: underline;" target="_blank" >DeepSite</a> - <a href="https://enzostvs-deepsite.hf.space?remix=azizln/zenpomo" style="color: #fff;text-decoration: underline;" target="_blank" >🧬 Remix</a></p></body>
</html>