@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

        :root {
            --primary-bg: #ffffff;
            --secondary-bg: #f8f9fa;
            --tertiary-bg: #e9ecef;
            --text-primary: #212529;
            --text-secondary: #6c757d;
            --text-muted: #adb5bd;
            --border-color: #dee2e6;
            --border-light: #f1f3f4;
            --shadow: 0 2px 4px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);
            --accent-color: #007bff;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--tertiary-bg) 100%);
            color: var(--text-primary);
            line-height: 1.6;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            font-weight: 400;
        }

        .main-content {
            margin-left: 280px;
            margin-top: 0;
            padding: 2rem 2.5rem;
            width: calc(100vw - 280px);
            min-height: 100vh;
            background: var(--primary-bg);
            transition: var(--transition);
        }

        /* Modern Card Design - Monochrome */
        .card {
            background: var(--primary-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
            position: relative;
        }

        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--border-color);
        }

        .card-header {
            background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
            color: var(--text-primary);
            padding: 1.5rem 2rem;
            border-bottom: 1px solid var(--border-light);
            font-weight: 600;
            font-size: 1.125rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .card-body {
            padding: 2rem;
        }

        /* Modern Table Design - Monochrome */
        .table {
            background: var(--primary-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow);
            margin-top: 0;
            border: 1px solid var(--border-light);
        }

        .table thead th {
            background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--tertiary-bg) 100%);
            border-bottom: 2px solid var(--border-color);
            font-weight: 600;
            color: var(--text-primary);
            padding: 1.25rem 1rem;
            text-transform: uppercase;
            font-size: 0.75rem;
            letter-spacing: 0.1em;
            border: none;
        }

        .table tbody tr {
            transition: var(--transition);
            border-bottom: 1px solid var(--border-light);
        }

        .table tbody tr:hover {
            background-color: var(--secondary-bg);
            transform: scale(1.002);
        }

        .table td {
            padding: 1.25rem 1rem;
            vertical-align: middle;
            border: none;
            color: var(--text-secondary);
        }

        /* Modern Button Styles - Monochrome with subtle accents */
        .btn {
            border-radius: var(--radius-md);
            font-weight: 500;
            padding: 0.75rem 1.5rem;
            transition: var(--transition);
            border: 2px solid transparent;
            font-size: 0.875rem;
            text-transform: none;
            letter-spacing: 0.025em;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            position: relative;
            overflow: hidden;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s;
        }

        .btn:hover::before {
            left: 100%;
        }

        .btn-primary {
            background: var(--accent-color);
            color: white;
            border-color: var(--accent-color);
        }

        .btn-primary:hover {
            background: #0056b3;
            border-color: #0056b3;
            transform: translateY(-1px);
            box-shadow: var(--shadow-lg);
        }

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

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

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

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

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

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

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

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

        /* Status Badges - Monochrome with subtle color hints */
        .badge {
            border-radius: 20px;
            padding: 0.375rem 0.875rem;
            font-size: 0.75rem;
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            border: 1px solid var(--border-color);
        }

        .badge-success {
            background: rgba(40, 167, 69, 0.1);
            color: var(--success-color);
            border-color: rgba(40, 167, 69, 0.2);
        }

        .badge-danger {
            background: rgba(220, 53, 69, 0.1);
            color: var(--danger-color);
            border-color: rgba(220, 53, 69, 0.2);
        }

        .badge-warning {
            background: rgba(255, 193, 7, 0.1);
            color: #856404;
            border-color: rgba(255, 193, 7, 0.2);
        }

        .badge-info {
            background: rgba(0, 123, 255, 0.1);
            color: var(--accent-color);
            border-color: rgba(0, 123, 255, 0.2);
        }

        /* Modern Form Styles - Clean monochrome */
        .form-control {
            border: 2px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 0.875rem 1rem;
            font-size: 0.875rem;
            transition: var(--transition);
            background: var(--primary-bg);
            color: var(--text-primary);
        }

        .form-control:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
            outline: none;
            background: var(--primary-bg);
        }

        .form-control::placeholder {
            color: var(--text-muted);
        }

        .form-label {
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            font-size: 0.875rem;
        }

        /* Modern Modal Styles - Monochrome */
        .modal-content {
            border-radius: var(--radius-xl);
            border: none;
            box-shadow: var(--shadow-xl);
            background: var(--primary-bg);
        }

        .modal-header {
            background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
            color: var(--text-primary);
            border-bottom: 1px solid var(--border-light);
            border-radius: var(--radius-xl) var(--radius-xl) 0 0;
            padding: 2rem;
            font-weight: 600;
        }

        .modal-body {
            padding: 2rem;
        }

        .modal-footer {
            border-top: 1px solid var(--border-light);
            padding: 1.5rem 2rem;
            background: var(--secondary-bg);
        }

        /* Sidebar Modernization - Monochrome */
        .sidenav {
            background: linear-gradient(180deg, #2d3748 0%, #1a202c 100%);
            box-shadow: var(--shadow-lg);
            border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
            backdrop-filter: blur(10px);
        }

        .sidenav a {
            color: #a0aec0;
            text-decoration: none;
            padding: 1rem 1.5rem;
            margin: 0.25rem 1rem;
            border-radius: var(--radius-md);
            transition: var(--transition);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            position: relative;
        }

        .sidenav a::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 4px;
            background: var(--accent-color);
            border-radius: 0 2px 2px 0;
            transform: scaleY(0);
            transition: var(--transition);
        }

        .sidenav a:hover {
            background: rgba(255, 255, 255, 0.05);
            color: #e2e8f0;
            transform: translateX(4px);
        }

        .sidenav a:hover::before {
            transform: scaleY(1);
        }

        .sidenav a.active {
            background: rgba(0, 123, 255, 0.1);
            color: white;
        }

        .sidenav a.active::before {
            transform: scaleY(1);
        }

        /* Tabulator Table Overrides - Monochrome */
        .tabulator {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }

        .tabulator .tabulator-header {
            background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--tertiary-bg) 100%);
            border-bottom: 2px solid var(--border-color);
        }

        .tabulator .tabulator-header .tabulator-col {
            background: transparent;
            border-right: 1px solid var(--border-light);
        }

        .tabulator .tabulator-row {
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .tabulator .tabulator-row:hover {
            background: var(--secondary-bg);
        }

        /* Scrollable Container Improvements - Monochrome */
        .scrollable-container {
            position: relative;
            width: 100%;
            overflow: hidden;
            margin-left: 0;
            border-radius: var(--radius-md);
        }

        .scrollable {
            display: flex;
            overflow-x: auto;
            scroll-behavior: smooth;
            white-space: nowrap;
            max-width: 100%;
            gap: 1rem;
            padding: 1rem;
        }

        .item {
            min-width: 220px;
            background: var(--primary-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            text-align: center;
            padding: 1.5rem;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }

        .item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border-color);
        }

        .arrow {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.25rem;
            background: rgba(0, 0, 0, 0.8);
            color: white;
            border: none;
            padding: 0.75rem;
            cursor: pointer;
            z-index: 10;
            border-radius: 50%;
            width: 3rem;
            height: 3rem;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: all 0.2s ease;
        }

        .arrow:hover {
            background: rgba(0, 0, 0, 0.9);
            transform: translateY(-50%) scale(1.1);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .main-content {
                margin-left: 0;
                width: 100%;
                padding: 1rem;
            }

            .sidenav {
                transform: translateX(-100%);
                transition: transform 0.3s ease;
            }

            .sidenav.open {
                transform: translateX(0);
            }

            .table-responsive {
                border-radius: var(--border-radius);
                box-shadow: var(--shadow);
            }
        }

        /* Loading States */
        .loading {
            opacity: 0.6;
            pointer-events: none;
        }

        .spinner {
            display: inline-block;
            width: 1rem;
            height: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 50%;
            border-top-color: var(--accent-color);
            animation: spin 1s ease-in-out infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Psychological Design Elements */
        .focus-ring {
            transition: var(--transition);
        }

        .focus-ring:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
        }

        /* Breathing space for better cognitive load */
        .section-spacing {
            margin-bottom: 3rem;
        }

        /* Visual hierarchy helpers */
        .text-hero {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
        }

        .text-lead {
            font-size: 1.25rem;
            font-weight: 400;
            line-height: 1.6;
            color: var(--text-secondary);
        }

        .text-caption {
            font-size: 0.75rem;
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--text-muted);
        }

        /* Micro-interactions */
        .micro-bounce {
            animation: microBounce 0.6s ease-in-out;
        }

        @keyframes microBounce {
            0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
            40% { transform: translateY(-4px); }
            60% { transform: translateY(-2px); }
        }

        /* Accessibility improvements */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* High contrast mode support */
        @media (prefers-contrast: high) {
            :root {
                --border-color: #000;
                --border-light: #333;
                --text-secondary: #666;
            }
        }

        /* Utility Classes */
        .text-gradient {
            background: linear-gradient(135deg, var(--accent-color) 0%, #0056b3 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .shadow-soft {
            box-shadow: var(--shadow);
        }

        .shadow-strong {
            box-shadow: var(--shadow-lg);
        }