/* CSS Variables for Theming */
        :root {
            --primary-color: #4a6cf7;
            --secondary-color: #6c757d;
            --success-color: #28a745;
            --danger-color: #dc3545;
            --warning-color: #ffc107;
            --info-color: #17a2b8;
            
            --bg-primary: #1a1d29;
            --bg-secondary: #222533;
            --bg-tertiary: #2a2e3f;
            --bg-hover: #323647;
            
            --text-primary: #ffffff;
            --text-secondary: #b8bcc8;
            --text-muted: #8a92a6;
            
            --border-color: #323647;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
            
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --border-radius: 8px;
            --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        /* Light Theme */
        body.light-theme {
            --bg-primary: #f8f9fa;
            --bg-secondary: #ffffff;
            --bg-tertiary: #e9ecef;
            --bg-hover: #f1f3f5;
            
            --text-primary: #212529;
            --text-secondary: #495057;
            --text-muted: #6c757d;
            
            --border-color: #dee2e6;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
        }

        /* Base Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            transition: var(--transition);
            overflow-x: hidden;
        }

        /* Typography */
        h1, h2, h3, h4, h5, h6 {
            margin-bottom: 1rem;
            font-weight: 600;
            line-height: 1.2;
        }

        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.75rem; }
        h4 { font-size: 1.5rem; }
        h5 { font-size: 1.25rem; }
        h6 { font-size: 1rem; }

        p {
            margin-bottom: 1rem;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.5rem 1rem;
            font-size: 1rem;
            font-weight: 500;
            text-decoration: none;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: var(--transition);
            background-color: var(--primary-color);
            color: white;
            box-shadow: var(--shadow);
        }

        .btn:hover {
            background-color: #3a5bd9;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-secondary {
            background-color: var(--bg-tertiary);
            color: var(--text-primary);
        }

        .btn-secondary:hover {
            background-color: var(--bg-hover);
        }

        .btn-success {
            background-color: var(--success-color);
        }

        .btn-success:hover {
            background-color: #218838;
        }

        .btn-danger {
            background-color: var(--danger-color);
        }

        .btn-danger:hover {
            background-color: #c82333;
        }

        .btn-warning {
            background-color: var(--warning-color);
            color: #212529;
        }

        .btn-warning:hover {
            background-color: #e0a800;
        }

        .btn-sm {
            padding: 0.25rem 0.5rem;
            font-size: 0.875rem;
        }

        .btn-icon {
            padding: 0.5rem;
            border-radius: 50%;
            width: 40px;
            height: 40px;
        }

        .btn-group {
            display: flex;
            gap: 0.5rem;
            margin-top: 1rem;
        }

        /* Voice Recognition Button */
        .voice-btn {
            position: relative;
            background-color: var(--info-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }

        .voice-btn:hover {
            background-color: #138496;
            transform: scale(1.05);
        }

        .voice-btn.listening {
            background-color: var(--danger-color);
            animation: pulse 1.5s infinite;
        }

        .voice-btn.processing {
            background-color: var(--warning-color);
        }

        .voice-btn.always-active {
            background-color: var(--success-color);
            box-shadow: 0 0 10px rgba(40, 167, 69, 0.7);
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(220, 53, 69, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(220, 53, 69, 0); }
            100% { box-shadow: 0 0 0 0 rgba(220, 53, 69, 0); }
        }

        /* Voice Recognition Feedback */
        .voice-feedback {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: rgba(0, 0, 0, 0.8);
            color: white;
            padding: 1.5rem 2rem;
            border-radius: var(--border-radius);
            text-align: center;
            z-index: 2000;
            display: none;
            max-width: 80%;
            box-shadow: var(--shadow-lg);
        }

        .voice-feedback.show {
            display: block;
            animation: fadeIn 0.3s ease-in-out;
        }

        .voice-feedback-title {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

        .voice-feedback-text {
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        .voice-feedback-status {
            font-size: 1rem;
            margin-top: 0.5rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* Voice Status Indicator */
        .voice-status {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background-color: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 10px 15px;
            border-radius: var(--border-radius);
            display: flex;
            align-items: center;
            gap: 10px;
            z-index: 1000;
            transition: var(--transition);
        }

        .voice-status.hidden {
            opacity: 0;
            transform: translateY(20px);
        }

        .voice-status-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--success-color);
            animation: pulse 2s infinite;
        }

        /* Quick Live Button */
        .quick-live-btn {
            position: fixed;
            bottom: 20px;
            left: 20px;
            background-color: var(--danger-color);
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: 30px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            transition: var(--transition);
            z-index: 1000;
            font-weight: 600;
            font-size: 1rem;
        }

        .quick-live-btn:hover {
            background-color: #c82333;
            transform: translateY(-2px);
        }

        /* Form Elements */
        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .form-control {
            display: block;
            width: 100%;
            padding: 0.75rem;
            font-size: 1rem;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            background-color: var(--bg-secondary);
            color: var(--text-primary);
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.25);
        }

        select.form-control {
            cursor: pointer;
        }

        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }

        /* Layout */
        .app-container {
            display: flex;
            height: 100vh;
            overflow: hidden;
        }

        /* Sidebar */
        .sidebar {
            width: 250px;
            background-color: var(--bg-secondary);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            z-index: 100;
        }

        .sidebar-header {
            padding: 1.5rem;
            border-bottom: 1px solid var(--border-color);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
        }

        .logo i {
            font-size: 2rem;
        }

        .sidebar-menu {
            flex: 1;
            padding: 1rem 0;
            overflow-y: auto;
        }

        .menu-item {
            display: flex;
            align-items: center;
            padding: 0.75rem 1.5rem;
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border-left: 3px solid transparent;
        }

        .menu-item:hover {
            background-color: var(--bg-hover);
            color: var(--text-primary);
        }

        .menu-item.active {
            background-color: rgba(74, 108, 247, 0.1);
            color: var(--primary-color);
            border-left-color: var(--primary-color);
        }

        .menu-item i {
            width: 24px;
            margin-right: 1rem;
            text-align: center;
        }

        .sidebar-footer {
            padding: 1rem;
            border-top: 1px solid var(--border-color);
        }

        /* Main Content */
        .main-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        .content-header {
            padding: 1.5rem;
            background-color: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .content-title {
            font-size: 1.5rem;
            font-weight: 600;
        }

        .content-actions {
            display: flex;
            gap: 0.5rem;
        }

        .content-body {
            flex: 1;
            padding: 1.5rem;
            overflow-y: auto;
            display: flex;
            gap: 1.5rem;
        }

        .content-column {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        /* Tabs */
        .tabs {
            display: flex;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
        }

        .tab {
            padding: 0.75rem 1.5rem;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            border-bottom: 3px solid transparent;
            transition: var(--transition);
        }

        .tab:hover {
            color: var(--text-primary);
            background-color: var(--bg-hover);
        }

        .tab.active {
            color: var(--primary-color);
            border-bottom-color: var(--primary-color);
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
            animation: fadeIn 0.3s ease-in-out;
        }

        /* Cards */
        .card {
            background-color: var(--bg-secondary);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            margin-bottom: 1.5rem;
        }

        .card-header {
            padding: 1rem 1.5rem;
            background-color: var(--bg-tertiary);
            border-bottom: 1px solid var(--border-color);
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .card-body {
            padding: 1.5rem;
        }

        .card-footer {
            padding: 1rem 1.5rem;
            background-color: var(--bg-tertiary);
            border-top: 1px solid var(--border-color);
        }

        /* Verse Preview */
        .verse-preview {
            padding: 2rem;
            background-color: var(--bg-tertiary);
            border-radius: var(--border-radius);
            margin-bottom: 1.5rem;
            text-align: center;
        }

        .verse-text {
            font-size: 1.5rem;
            line-height: 1.8;
            margin-bottom: 1rem;
            font-style: italic;
        }

        .verse-reference {
            font-size: 1rem;
            color: var(--text-secondary);
            font-weight: 600;
        }

        /* Song List */
        .song-list {
            display: grid;
            gap: 1rem;
        }

        .song-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem;
            background-color: var(--bg-tertiary);
            border-radius: var(--border-radius);
            transition: var(--transition);
            cursor: pointer;
        }

        .song-item:hover {
            background-color: var(--bg-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .song-title {
            font-weight: 600;
            margin-bottom: 0.25rem;
        }

        .song-artist {
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        .song-actions {
            display: flex;
            gap: 0.5rem;
        }

        /* Playlist */
        .playlist {
            background-color: var(--bg-tertiary);
            border-radius: var(--border-radius);
            padding: 1rem;
            min-height: 400px;
        }

        .playlist-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem;
            background-color: var(--bg-secondary);
            border-radius: var(--border-radius);
            margin-bottom: 0.75rem;
            cursor: move;
            transition: var(--transition);
        }

        .playlist-item:hover {
            background-color: var(--bg-hover);
        }

        .playlist-item.active {
            background-color: rgba(74, 108, 247, 0.2);
            border-left: 3px solid var(--primary-color);
        }

        .playlist-item.dragging {
            opacity: 0.5;
        }

        .playlist-item-info {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .playlist-item-type {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: white;
        }

        .playlist-item-title {
            font-weight: 600;
        }

        .playlist-item-subtitle {
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        .playlist-controls {
            display: flex;
            gap: 0.5rem;
            margin-top: 1.5rem;
        }

        /* Preview Panel */
        .preview-panel {
            position: sticky;
            top: 0;
            height: calc(100vh - 120px);
        }

        .preview-container {
            height: 100%;
            background-color: #000;
            border-radius: var(--border-radius);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 2rem;
            position: relative;
            overflow: hidden;
        }

        .preview-content {
            text-align: center;
            max-width: 90%;
            animation: fadeIn 0.8s ease-in-out;
        }

        .preview-text {
            font-size: 2.5rem;
            line-height: 1.5;
            margin-bottom: 1.5rem;
            font-weight: 300;
            letter-spacing: 0.5px;
            color: white;
        }

        .preview-reference {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.8);
            font-weight: 500;
        }

        .preview-label {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background-color: rgba(74, 108, 247, 0.8);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            font-size: 0.875rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .preview-controls {
            position: absolute;
            bottom: 1rem;
            right: 1rem;
            display: flex;
            gap: 0.5rem;
        }

        .preview-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.2);
            color: white;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }

        .preview-btn:hover {
            background-color: rgba(255, 255, 255, 0.3);
        }

        /* Animations */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Responsive */
        @media (max-width: 1200px) {
            .content-body {
                flex-direction: column;
            }
            
            .preview-panel {
                position: relative;
                height: 400px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                position: fixed;
                left: -250px;
                height: 100vh;
                z-index: 1000;
            }

            .sidebar.active {
                left: 0;
            }

            .main-content {
                margin-left: 0;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .preview-text {
                font-size: 1.8rem;
            }

            .preview-reference {
                font-size: 1rem;
            }
        }

        /* Utility Classes */
        .d-none { display: none; }
        .d-flex { display: flex; }
        .align-center { align-items: center; }
        .justify-between { justify-content: space-between; }
        .text-center { text-align: center; }
        .mt-1 { margin-top: 0.25rem; }
        .mt-2 { margin-top: 0.5rem; }
        .mt-3 { margin-top: 1rem; }
        .mt-4 { margin-top: 1.5rem; }
        .mt-5 { margin-top: 3rem; }
        .mb-1 { margin-bottom: 0.25rem; }
        .mb-2 { margin-bottom: 0.5rem; }
        .mb-3 { margin-bottom: 1rem; }
        .mb-4 { margin-bottom: 1.5rem; }
        .mb-5 { margin-bottom: 3rem; }
        .p-1 { padding: 0.25rem; }
        .p-2 { padding: 0.5rem; }
        .p-3 { padding: 1rem; }
        .p-4 { padding: 1.5rem; }
        .p-5 { padding: 3rem; }

        /* Search Bar */
        .search-bar {
            position: relative;
            margin-bottom: 1.5rem;
        }

        .search-bar input {
            padding-left: 2.5rem;
        }

        .search-bar i {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
        }

        /* Notification Toast */
        .toast-container {
            position: fixed;
            top: 1rem;
            right: 1rem;
            z-index: 2000;
        }

        .toast {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
            border-radius: var(--border-radius);
            padding: 1rem 1.5rem;
            margin-bottom: 0.75rem;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            gap: 1rem;
            min-width: 300px;
            animation: slideInRight 0.3s ease-out;
        }

        .toast.success {
            border-left: 4px solid var(--success-color);
        }

        .toast.error {
            border-left: 4px solid var(--danger-color);
        }

        .toast.info {
            border-left: 4px solid var(--info-color);
        }

        @keyframes slideInRight {
            from { transform: translateX(100%); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }

        /* Theme Toggle */
        .theme-toggle {
            position: relative;
            width: 60px;
            height: 30px;
            background-color: var(--bg-tertiary);
            border-radius: 15px;
            cursor: pointer;
            transition: var(--transition);
        }

        .theme-toggle-slider {
            position: absolute;
            top: 3px;
            left: 3px;
            width: 24px;
            height: 24px;
            background-color: white;
            border-radius: 50%;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .theme-toggle.active .theme-toggle-slider {
            transform: translateX(30px);
        }

        /* Mobile Menu Toggle */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Loading Spinner */
        .spinner {
            border: 3px solid var(--bg-tertiary);
            border-top: 3px solid var(--primary-color);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
            margin: 2rem auto;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* Song Sections */
        .song-section {
            margin-bottom: 1.5rem;
        }

        .song-section-title {
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 0.5rem;
        }

        .song-section-content {
            background-color: var(--bg-tertiary);
            padding: 1rem;
            border-radius: var(--border-radius);
            line-height: 1.8;
        }

        /* Live Indicator */
        .live-indicator {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background-color: var(--danger-color);
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.7; }
            100% { opacity: 1; }
        }

        .live-dot {
            width: 8px;
            height: 8px;
            background-color: white;
            border-radius: 50%;
        }

        /* Predictive Verse Suggestions */
        .verse-suggestions {
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            margin-top: 0.5rem;
            max-height: 200px;
            overflow-y: auto;
            z-index: 100;
            display: none;
        }

        .verse-suggestions.show {
            display: block;
        }

        .verse-suggestion-item {
            padding: 0.75rem 1rem;
            cursor: pointer;
            transition: var(--transition);
        }

        .verse-suggestion-item:hover {
            background-color: var(--bg-hover);
        }

        .verse-suggestion-item.active {
            background-color: rgba(74, 108, 247, 0.1);
        }

        /* Performance Optimizations */
        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 3000;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s;
        }

        .loading-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        .loading-content {
            background-color: var(--bg-secondary);
            padding: 2rem;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: var(--shadow-lg);
        }

        .loading-spinner {
            width: 50px;
            height: 50px;
            border: 4px solid var(--bg-tertiary);
            border-top: 4px solid var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 1rem;
        }