:root {
            --primary: #8a2be2;
            --primary-dark: #6a1cb0;
            --primary-light: #9d4edd;
            --secondary: #121212;
            --secondary-light: #1e1e1e;
            --secondary-lighter: #2d2d2d;
            --text: #ffffff;
            --text-secondary: #b0b0b0;
            --success: #00c853;
            --warning: #ffab00;
            --danger: #ff5252;
            --info: #2196f3;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
            --radius: 12px;
            --radius-small: 8px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        body {
            background: var(--secondary);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .app-container {
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* Header Styles */
        header {
            background: var(--secondary-light);
            padding: 1rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(10px);
        }

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

        .logo:hover {
            transform: scale(1.05);
        }

        .logo i {
            font-size: 1.75rem;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .user-profile {
            position: relative;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            cursor: pointer;
            padding: 0.5rem;
            border-radius: var(--radius-small);
            transition: var(--transition);
        }

        .user-profile:hover {
            background: var(--secondary-lighter);
        }

        .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 1.1rem;
        }

        .user-name {
            font-weight: 500;
        }

        .profile-dropdown {
            position: absolute;
            top: 100%;
            right: 0;
            background: var(--secondary-light);
            border-radius: var(--radius-small);
            box-shadow: var(--shadow);
            width: 200px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: var(--transition);
            z-index: 101;
        }

        .profile-dropdown.active {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.75rem 1rem;
            color: var(--text);
            text-decoration: none;
            transition: var(--transition);
            border-bottom: 1px solid var(--secondary-lighter);
        }

        .dropdown-item:last-child {
            border-bottom: none;
        }

        .dropdown-item:hover {
            background: var(--secondary-lighter);
        }

        .dropdown-item i {
            width: 20px;
            text-align: center;
        }

        .logout-item {
            color: var(--danger);
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
            border-radius: var(--radius-small);
            transition: var(--transition);
        }

        .mobile-nav-toggle:hover {
            background: var(--secondary-lighter);
        }

        /* Main Content */
        .main-content {
            display: flex;
            flex: 1;
        }

        /* Sidebar */
        .sidebar {
            width: 280px;
            background: var(--secondary-light);
            transition: var(--transition);
            overflow-y: auto;
            height: calc(100vh - 80px);
            position: sticky;
            top: 80px;
        }

        .sidebar-menu {
            list-style: none;
            padding: 1rem 0;
        }

        .menu-category {
            padding: 1rem 1.5rem;
            font-weight: 600;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            cursor: pointer;
            transition: var(--transition);
            user-select: none;
        }

        .menu-category:hover {
            color: var(--text);
            background: var(--secondary-lighter);
        }

        .menu-category.collapsed + .submenu {
            display: none;
        }

        .menu-category i {
            width: 20px;
            text-align: center;
        }

        .submenu {
            list-style: none;
        }

        .menu-item {
            padding: 0.75rem 1.5rem 0.75rem 3rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            cursor: pointer;
            transition: var(--transition);
            color: var(--text-secondary);
            border-left: 3px solid transparent;
        }

        .menu-item:hover {
            background: var(--secondary-lighter);
            color: var(--text);
        }

        .menu-item.active {
            background: var(--secondary-lighter);
            color: var(--primary);
            border-left-color: var(--primary);
        }

        .menu-item i {
            width: 20px;
            text-align: center;
        }

        /* Content Area */
        .content {
            flex: 1;
            padding: 2rem;
            overflow-y: auto;
            background: var(--secondary);
        }

        .tab-content {
            display: none;
            animation: fadeIn 0.4s ease;
        }

        .tab-content.active {
            display: block;
        }

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

        h2 {
            margin-bottom: 1.5rem;
            font-size: 1.75rem;
            font-weight: 600;
            color: var(--text);
            position: relative;
            padding-bottom: 0.5rem;
        }

        h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }

        /* Dashboard Cards */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .card {
            background: var(--secondary-light);
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--secondary-lighter);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.5s ease;
        }

        .card:hover::before {
            transform: scaleX(1);
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }

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

        .card-icon {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
        }

        .card-value {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            background: linear-gradient(45deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .card-growth {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Charts Row */
        .charts-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .chart-container {
            background: var(--secondary-light);
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--secondary-lighter);
        }

        .chart-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
        }

        .chart-title {
            font-size: 1.25rem;
            font-weight: 600;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }

        .stat-item {
            background: var(--secondary);
            border-radius: var(--radius-small);
            padding: 1rem;
            text-align: center;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0.5rem;
        }

        .stat-value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
        }

        .disputes-stats {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .dispute-stat {
            background: var(--secondary);
            border-radius: var(--radius-small);
            padding: 1rem;
        }

        .dispute-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0.5rem;
        }

        .dispute-value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
        }

        .dispute-amount {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Tables */
        .table-container {
            background: var(--secondary-light);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--secondary-lighter);
        }

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

        .table-title {
            font-size: 1.25rem;
            font-weight: 600;
        }

        .table-actions {
            display: flex;
            gap: 0.75rem;
        }

        .btn {
            padding: 0.5rem 1rem;
            border: none;
            border-radius: var(--radius-small);
            cursor: pointer;
            font-weight: 500;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

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

        .btn-danger:hover {
            background: #e04040;
            transform: translateY(-2px);
        }

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

        .btn-success:hover {
            background: #00b248;
            transform: translateY(-2px);
        }

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

        .btn-warning:hover {
            background: #e69a00;
            transform: translateY(-2px);
        }

        .table-content {
            overflow-x: auto;
        }

        table {
            width: 100%;
            border-collapse: collapse;
        }

        th, td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid var(--secondary-lighter);
        }

        th {
            background: var(--secondary);
            font-weight: 600;
            color: var(--text-secondary);
            position: sticky;
            top: 0;
        }

        tr {
            transition: var(--transition);
        }

        tr:hover {
            background: var(--secondary-lighter);
        }

        .table-footer {
            padding: 1rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--secondary-lighter);
        }

        .pagination {
            display: flex;
            gap: 0.5rem;
        }

        .page-btn {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-small);
            background: var(--secondary);
            border: none;
            color: var(--text);
            cursor: pointer;
            transition: var(--transition);
        }

        .page-btn.active {
            background: var(--primary);
        }

        .page-btn:hover:not(.active) {
            background: var(--secondary-lighter);
        }

        /* Loader */
        .loader {
            display: inline-block;
            width: 50px;
            height: 50px;
            border: 3px solid rgba(138, 43, 226, 0.3);
            border-radius: 50%;
            border-top-color: var(--primary);
            animation: spin 1s ease-in-out infinite;
            margin: 2rem auto;
            display: block;
        }

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

        /* Modal */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            backdrop-filter: blur(5px);
            animation: fadeIn 0.3s ease;
        }

        .modal-content {
            background: var(--secondary-light);
            border-radius: var(--radius);
            width: 90%;
            max-width: 500px;
            margin: 5% auto;
            padding: 1.5rem;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            animation: slideUp 0.4s ease;
            border: 1px solid var(--secondary-lighter);
        }

        @keyframes slideUp {
            from { transform: translateY(50px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }

        .modal h2 {
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }

        .modal-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .modal-form div {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        label {
            font-weight: 500;
            color: var(--text-secondary);
        }

        input, select, textarea {
            padding: 0.75rem;
            border-radius: var(--radius-small);
            border: 1px solid var(--secondary-lighter);
            background: var(--secondary);
            color: var(--text);
            transition: var(--transition);
        }

        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(138, 43, 226, 0.2);
        }

        .modal-buttons {
            display: flex;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        /* Footer */
        footer {
            background: var(--secondary-light);
            padding: 1.5rem;
            text-align: center;
            color: var(--text-secondary);
            border-top: 1px solid var(--secondary-lighter);
        }

        /* Mobile Responsive */
        @media (max-width: 1024px) {
            .sidebar {
                width: 250px;
            }
            
            .cards-grid {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            }
            
            .charts-row {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .mobile-nav-toggle {
                display: block;
            }
            
            .sidebar {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 280px;
                height: calc(100vh - 80px);
                z-index: 99;
                box-shadow: 5px 0 15px rgba(0, 0, 0, 0.3);
            }
            
            .sidebar.active {
                left: 0;
            }
            
            .content {
                padding: 1.5rem;
            }
            
            .cards-grid {
                grid-template-columns: 1fr;
            }
            
            .table-header {
                flex-direction: column;
                gap: 1rem;
                align-items: flex-start;
            }
            
            .table-actions {
                width: 100%;
                justify-content: flex-end;
            }
            
            .modal-content {
                width: 95%;
                margin: 10% auto;
            }
            
            .user-name {
                display: none;
            }
        }

        @media (max-width: 480px) {
            header {
                padding: 1rem;
            }
            
            .content {
                padding: 1rem;
            }
            
            .card {
                padding: 1rem;
            }
            
            .card-value {
                font-size: 1.75rem;
            }
            
            .chart-container {
                padding: 1rem;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
            
            .table-footer {
                flex-direction: column;
                gap: 1rem;
                align-items: flex-start;
            }
            
            .pagination {
                align-self: center;
            }
        }

        /* Additional Animations */
        .pulse {
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        .slide-in-left {
            animation: slideInLeft 0.5s ease;
        }

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

        .bounce {
            animation: bounce 0.5s ease;
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
            40% { transform: translateY(-10px); }
            60% { transform: translateY(-5px); }
        }