:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --tracking-blue: #4a6fa5;
            --tracking-green: #4caf50;
            --tracking-red: #f44336;
            --tracking-yellow: #ffc107;
            --tracking-purple: #9c27b0;
        }
         
        .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);
            position: relative;
            overflow: hidden;  color: var(--text-color);
        }
         
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        
        .breadcrumb-item.active {
            color: var(--text-color);
        }
         
        /* Video Container */
        .video-container {
            position: relative;
            width: 100%;
            background-color: #000;
            border-radius: 8px;
            overflow: hidden;
            margin-bottom: 1.5rem;
        }
        
        .video-wrapper {
            position: relative;
            width: 100%;
            height: 0;
            padding-bottom: 56.25%; /* 16:9 aspect ratio */
        }
        
        #videoCanvas, #sourceVideo {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: contain;
        }
        
        #videoCanvas {
            z-index: 2;
        }
        
        .video-controls {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
            padding: 1rem;
            z-index: 3;
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: white;
        }
        
        .video-progress {
            flex-grow: 1;
            margin: 0 1rem;
        }
        
        .video-time {
            font-size: 0.9rem;
            min-width: 100px;
        }
        
        /* Control Panel */
        .control-panel {
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
        }
        
        .control-section {
            margin-bottom: 1.5rem;
        }
        
        .control-section:last-child {
            margin-bottom: 0;
        }
        
        .control-title {
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--primary-color);
            display: flex;
            align-items: center;
        }
        
        .control-title i {
            margin-right: 0.5rem;
        }
        
        /* Form Styles */
        .form-label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-color);
        }
        
        .form-control, .form-select {
            border: 1px solid #ddd;
            border-radius: 6px;
            padding: 0.75rem;
            transition: all 0.3s;
        }
        
        .form-control:focus, .form-select:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 125, 160, 0.15);
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            font-weight: 600;
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            transition: all 0.3s;
        }
        
        .btn-primary:hover {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            transform: translateY(-1px);
        }
        
        .btn-outline-secondary {
            font-weight: 600;
            border-radius: 6px;
            padding: 0.75rem 1.5rem;
        }
        
        /* Tracking Objects List */
        .tracking-objects {
            max-height: 300px;
            overflow-y: auto;
            margin-bottom: 1.5rem;
        }
        
        .tracking-object {
            display: flex;
            align-items: center;
            padding: 0.75rem;
            border-bottom: 1px solid var(--border-color);
            transition: background-color 0.3s;
        }
        
        .tracking-object:hover {
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .object-color {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            margin-right: 0.75rem;
        }
        
        .object-info {
            flex-grow: 1;
        }
        
        .object-name {
            font-weight: 600;
            margin-bottom: 0.25rem;
        }
        
        .object-stats {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        
        /* Results Section */
        .results-container {
            background-color: var(--light-gray);
            border-radius: 6px;
            padding: 1.5rem;
            margin-top: 1.5rem;
            position: relative;
            border: 1px solid var(--border-color);
        }
        
        .results-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        .chart-container {
            position: relative;
            height: 300px;
            width: 100%;
            margin: 1.5rem 0;
        }
        
        /* Data Table */
        .data-table-container {
            margin-top: 1.5rem;
            max-height: 400px;
            overflow-y: auto;
        }
        
        .data-table {
            width: 100%;
            border-collapse: collapse;
        }
        
        .data-table th, .data-table td {
            padding: 0.75rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        
        .data-table th {
            background-color: rgba(44, 125, 160, 0.1);
            font-weight: 600;
            color: var(--primary-color);
            position: sticky;
            top: 0;
        }
        
        .data-table tr:hover {
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        /* Color Legend */
        .color-legend {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        .legend-item {
            display: flex;
            align-items: center;
            margin-right: 1rem;
        }
        
        .legend-color {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            margin-right: 0.5rem;
        }
        
        /* Footer */
        .footer {
            background-color: var(--light-gray);
            margin-top: 3rem;
            border-top: 1px solid var(--border-color);
        }
        
        /* Responsive Adjustments */
        @media (max-width: 992px) {
            .tool-card {
                padding: 1.5rem;
            }
        }
        
        /* Loading Indicator */
        .loading-indicator {
            display: none;
            text-align: center;
            padding: 2rem;
        }
        
        .loading-indicator.active {
            display: block;
        }
        
        .spinner {
            width: 3rem;
            height: 3rem;
            border: 3px solid rgba(44, 125, 160, 0.1);
            border-radius: 50%;
            border-top-color: var(--primary-color);
            animation: spin 1s linear infinite;
            margin: 0 auto 1rem;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        /* Alert Messages */
        .alert {
            border-radius: 6px;
            padding: 1rem;
            margin-bottom: 1rem;
            border-left: 4px solid;
        }
        
        .alert-info {
            background-color: rgba(44, 125, 160, 0.1);
            border-left-color: var(--primary-color);
        }
        
        .alert-success {
            background-color: rgba(40, 167, 69, 0.1);
            border-left-color: var(--success-color);
        }
        
        .alert-warning {
            background-color: rgba(255, 193, 7, 0.1);
            border-left-color: var(--warning-color);
        }
        
        /* Object Tracking Status */
        .tracking-status {
            display: inline-block;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: 600;
        }
        
        .status-tracking {
            background-color: rgba(76, 175, 80, 0.1);
            color: var(--tracking-green);
        }
        
        .status-lost {
            background-color: rgba(244, 67, 54, 0.1);
            color: var(--tracking-red);
        }
        
        /* Custom Range Slider */
        .custom-range {
            -webkit-appearance: none;
            width: 100%;
            height: 8px;
            border-radius: 4px;
            background: var(--light-gray);
            outline: none;
        }
        
        .custom-range::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary-color);
            cursor: pointer;
        }
        
        .custom-range::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary-color);
            cursor: pointer;
            border: none;
        }
        
        /* Toast Container */
        .toast-container {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 1050;
        }
        
        /* Visualization Controls */
        .visualization-controls {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        .vis-checkbox {
            display: flex;
            align-items: center;
        }
        
        .vis-checkbox input {
            margin-right: 0.5rem;
        }
        
        /* Object Details Panel */
        .object-details {
            background-color: white;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            padding: 1.5rem;
            margin-top: 1.5rem;
        }
        
        .detail-row {
            display: flex;
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .detail-row:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        
        .detail-label {
            font-weight: 600;
            min-width: 150px;
            color: var(--text-color);
        }
        
        .detail-value {
            flex-grow: 1;
            color: var(--text-muted);
        }
        
        /* Tabs */
        .nav-tabs {
            border-bottom: 1px solid var(--border-color);
        }
        
        .nav-tabs .nav-link {
            border: none;
            color: var(--text-muted);
            font-weight: 600;
            padding: 0.75rem 1.5rem;
        }
        
        .nav-tabs .nav-link.active {
            color: var(--primary-color);
            background-color: transparent;
            border-bottom: 3px solid var(--primary-color);
        }
        
        .tab-content {
            padding: 1.5rem 0;
        }
        
        /* Export Options */
        .export-options {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }
        
        /* Demo Alert */
        .demo-alert {
            background: linear-gradient(135deg, #ffeaa7, #fab1a0);
            border-left: 4px solid #e17055;
            border-radius: 6px;
            padding: 1rem 1.5rem;
            margin-bottom: 1.5rem;
        }
        
        .demo-alert h5 {
            color: #d63031;
            margin-bottom: 0.5rem;
        }
        
        .premium-badge {
            background: linear-gradient(135deg, #fdcb6e, #e17055);
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-block;
            margin-left: 0.5rem;
        }