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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Focus Guard</title>
    <link href="https://fonts.googleapis.com/css2?family=Nunito:wght@400;700&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="/static/styles.css?v=2">
</head>
<body>
    <h1>Focus Guard</h1>
  
    <!-- Top Menu -->
    <nav id="top-menu">
        <button id="menu-start" class="menu-btn">Start Focus</button>
        <div class="separator"></div>
        <button id="menu-achievement" class="menu-btn">My Achievement</button>
        <div class="separator"></div>
        <button id="menu-records" class="menu-btn">My Records</button>
        <div class="separator"></div>
        <button id="menu-customise" class="menu-btn">Customise</button>
        <div class="separator"></div>
        <button id="menu-help" class="menu-btn">Help</button>
    </nav>
    <!-- Page A -->
    <main id="page-a" class="page">
        <h1>Focus Guard</h1>
        <p>Your productivity monitor assistant.</p>
        <button id="start-button" class="btn-main">Start</button>
    </main>
    <!-- Page B -->
    <main id="page-b" class="page hidden">
        <!-- 1. Camera / Display Area -->
        <section id="display-area">
            <p id="display-placeholder">Nothing</p>
        </section>

        <!-- 2. Timeline Area -->
        <section id="timeline-area">
            <div class="timeline-label">Timeline</div>
            <div id="timeline-visuals"></div>
            <div id="timeline-line"></div>
        </section>

        <!-- 3. Control Buttons -->
        <section id="control-panel">
            <button id="btn-cam-start" class="action-btn green">Start</button>
            <button id="btn-floating" class="action-btn yellow">Floating Window</button>
            <button id="btn-models" class="action-btn blue">Models</button>
            <button id="btn-cam-stop" class="action-btn red">Stop</button>
        </section>

        <!-- 4. Frame Control -->
        <section id="frame-control">
            <label for="frame-slider">Frame</label>
            <input type="range" id="frame-slider" min="1" max="60" value="30">
            <input type="number" id="frame-input" value="30">
        </section>
    </main>

    <!-- Page C - My Achievement -->
    <main id="page-c" class="page hidden">
        <h1>My Achievement</h1>

        <div class="stats-grid">
            <div class="stat-card">
                <div class="stat-number" id="total-sessions">0</div>
                <div class="stat-label">Total Sessions</div>
            </div>
            <div class="stat-card">
                <div class="stat-number" id="total-hours">0h</div>
                <div class="stat-label">Total Focus Time</div>
            </div>
            <div class="stat-card">
                <div class="stat-number" id="avg-focus">0%</div>
                <div class="stat-label">Average Focus</div>
            </div>
            <div class="stat-card">
                <div class="stat-number" id="current-streak">0</div>
                <div class="stat-label">Day Streak</div>
            </div>
        </div>

        <div class="achievements-section">
            <h2>Badges</h2>
            <div id="badges-container" class="badges-grid"></div>
        </div>
    </main>

    <!-- Page D - My Records -->
    <main id="page-d" class="page hidden">
        <h1>My Records</h1>

        <div class="records-controls">
            <button id="filter-today" class="filter-btn active">Today</button>
            <button id="filter-week" class="filter-btn">This Week</button>
            <button id="filter-month" class="filter-btn">This Month</button>
            <button id="filter-all" class="filter-btn">All Time</button>
        </div>

        <div class="chart-container">
            <canvas id="focus-chart"></canvas>
        </div>

        <div class="sessions-list">
            <h2>Recent Sessions</h2>
            <table id="sessions-table">
                <thead>
                    <tr>
                        <th>Date</th>
                        <th>Duration</th>
                        <th>Focus Score</th>
                        <th>Action</th>
                    </tr>
                </thead>
                <tbody id="sessions-tbody"></tbody>
            </table>
        </div>
    </main>

    <!-- Page E - Customise -->
    <main id="page-e" class="page hidden">
        <h1>Customise</h1>

        <div class="settings-container">
            <div class="setting-group">
                <h2>Detection Settings</h2>

                <div class="setting-item">
                    <label for="sensitivity-slider">Detection Sensitivity</label>
                    <div class="slider-group">
                        <input type="range" id="sensitivity-slider" min="1" max="10" value="6">
                        <span id="sensitivity-value">6</span>
                    </div>
                    <p class="setting-description">Higher values require stricter focus criteria</p>
                </div>

                <div class="setting-item">
                    <label for="default-framerate">Default Frame Rate</label>
                    <div class="slider-group">
                        <input type="range" id="default-framerate" min="5" max="60" value="30">
                        <span id="framerate-value">30</span> FPS
                    </div>
                </div>
            </div>

            <div class="setting-group">
                <h2>Notifications</h2>

                <div class="setting-item">
                    <label>
                        <input type="checkbox" id="enable-notifications" checked>
                        Enable distraction notifications
                    </label>
                </div>

                <div class="setting-item">
                    <label for="notification-threshold">Alert after (seconds)</label>
                    <input type="number" id="notification-threshold" value="30" min="5" max="300">
                </div>
            </div>

            <div class="setting-group">
                <h2>Data Management</h2>

                <button id="export-data" class="action-btn blue">Export Data</button>
                <button id="clear-history" class="action-btn red">Clear History</button>
            </div>

            <button id="save-settings" class="btn-main">Save Settings</button>
        </div>
    </main>

    <!-- Page F - Help -->
    <main id="page-f" class="page hidden">
        <h1>Help</h1>

        <div class="help-container">
            <section class="help-section">
                <h2>How to Use Focus Guard</h2>
                <ol>
                    <li>Click "Start" or navigate to "Start Focus" in the menu</li>
                    <li>Allow camera access when prompted</li>
                    <li>Click the green "Start" button to begin monitoring</li>
                    <li>Position yourself in front of the camera</li>
                    <li>The system will track your focus in real-time</li>
                    <li>Click "Stop" when you're done to save the session</li>
                </ol>
            </section>

            <section class="help-section">
                <h2>What is "Focused"?</h2>
                <p>The system considers you focused when:</p>
                <ul>
                    <li>You are clearly visible in the camera frame</li>
                    <li>You are centered in the view</li>
                    <li>Your face is directed toward the screen</li>
                    <li>No other people are detected in the frame</li>
                </ul>
            </section>

            <section class="help-section">
                <h2>Adjusting Settings</h2>
                <p><strong>Frame Rate:</strong> Lower values reduce CPU usage but update less frequently. Recommended: 15-30 FPS.</p>
                <p><strong>Sensitivity:</strong> Higher values require stricter focus criteria. Adjust based on your setup.</p>
            </section>

            <section class="help-section">
                <h2>Privacy & Data</h2>
                <p>All video processing happens in real-time. No video frames are stored - only detection metadata (focus status, timestamps) is saved in your local database.</p>
            </section>

            <section class="help-section">
                <h2>FAQ</h2>
                <details>
                    <summary>Why is my focus score low?</summary>
                    <p>Ensure good lighting, center yourself in the camera frame, and adjust sensitivity settings in the Customise page.</p>
                </details>
                <details>
                    <summary>Can I use this without a camera?</summary>
                    <p>No, camera access is required for focus detection.</p>
                </details>
                <details>
                    <summary>Does this work on mobile?</summary>
                    <p>The app works on mobile browsers but performance may vary due to processing requirements.</p>
                </details>
                <details>
                    <summary>Is my data private?</summary>
                    <p>Yes! All processing happens locally. Video frames are analyzed in real-time and never stored. Only metadata is saved.</p>
                </details>
            </section>

            <section class="help-section">
                <h2>Technical Info</h2>
                <p><strong>Model:</strong> YOLOv8n (Nano)</p>
                <p><strong>Detection:</strong> Real-time person detection with pose analysis</p>
                <p><strong>Storage:</strong> SQLite local database</p>
                <p><strong>Framework:</strong> FastAPI + Native JavaScript</p>
            </section>
        </div>
    </main>

    <script src="/static/script.js?v=2"></script>
</body>
</html>