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

        :root {
            --primary-blue: #3b82f6;
            --primary-green: #10b981;
            --primary-red: #ef4444;
            --primary-orange: #f59e0b;
            --primary-purple: #8b5cf6;
            --bg-dark: #1f2937;
            --bg-light: #f9fafb;
            --text-dark: #111827;
            --text-light: #6b7280;
            --border-color: #e5e7eb;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
        }

        .dashboard {
            display: grid;
            grid-template-columns: 250px 1fr;
            min-height: 100vh;
        }

        /* Sidebar Navigation */
        .sidebar {
            background: var(--bg-dark);
            color: white;
            padding: 2rem 1rem;
            position: sticky;
            top: 0;
            height: 100vh;
            overflow-y: auto;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 2rem;
            color: var(--primary-blue);
            text-align: center;
        }

        .nav-section {
            margin-bottom: 2rem;
        }

        .nav-title {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: #9ca3af;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.75rem 1rem;
            border-radius: 0.5rem;
            cursor: pointer;
            transition: all 0.2s;
            margin-bottom: 0.25rem;
        }

        .nav-item:hover {
            background: rgba(59, 130, 246, 0.1);
        }

        .nav-item.active {
            background: var(--primary-blue);
            color: white;
        }

        .nav-icon {
            font-size: 1.25rem;
        }

        /* Main Content */
        .main-content {
            padding: 2rem;
            overflow-y: auto;
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            background: white;
            padding: 1.5rem;
            border-radius: 1rem;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        .header-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
        }

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

        .btn {
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            border: none;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

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

        .btn-primary:hover {
            background: #2563eb;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
        }

        .btn-secondary {
            background: white;
            color: var(--text-dark);
            border: 1px solid var(--border-color);
        }

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

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .stat-card {
            background: white;
            padding: 1.5rem;
            border-radius: 1rem;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            border-left: 4px solid;
        }

        .stat-card.blue { border-color: var(--primary-blue); }
        .stat-card.green { border-color: var(--primary-green); }
        .stat-card.red { border-color: var(--primary-red); }
        .stat-card.orange { border-color: var(--primary-orange); }

        .stat-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 0.5rem;
        }

        .stat-label {
            font-size: 0.875rem;
            color: var(--text-light);
            font-weight: 500;
        }

        .stat-icon {
            font-size: 1.5rem;
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .stat-trend {
            font-size: 0.875rem;
            color: var(--primary-green);
        }

        .stat-trend.negative {
            color: var(--primary-red);
        }

        /* Content Sections */
        .content-section {
            display: none;
        }

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

        /* Tickets Table */
        .tickets-container {
            background: white;
            border-radius: 1rem;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            overflow: hidden;
        }

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

        .table-title {
            font-size: 1.25rem;
            font-weight: 700;
        }

        .search-filter {
            display: flex;
            gap: 1rem;
        }

        .search-box {
            padding: 0.5rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 0.5rem;
            min-width: 250px;
        }

        .filter-select {
            padding: 0.5rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 0.5rem;
            cursor: pointer;
        }

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

        .tickets-table th {
            text-align: left;
            padding: 1rem 1.5rem;
            background: var(--bg-light);
            font-weight: 600;
            font-size: 0.875rem;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .tickets-table td {
            padding: 1rem 1.5rem;
            border-top: 1px solid var(--border-color);
        }

        .tickets-table tr:hover {
            background: var(--bg-light);
        }

        .ticket-id {
            font-weight: 600;
            color: var(--primary-blue);
            cursor: pointer;
        }

        .ticket-id:hover {
            text-decoration: underline;
        }

        .priority-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 1rem;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
        }

        .priority-p1 {
            background: #fee2e2;
            color: #991b1b;
        }

        .priority-p2 {
            background: #fed7aa;
            color: #9a3412;
        }

        .priority-p3 {
            background: #dbeafe;
            color: #1e40af;
        }

        .priority-p4 {
            background: #e5e7eb;
            color: #374151;
        }

        .status-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 1rem;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .status-open {
            background: #fee2e2;
            color: #991b1b;
        }

        .status-in-progress {
            background: #fef3c7;
            color: #92400e;
        }

        .status-resolved {
            background: #d1fae5;
            color: #065f46;
        }

        .status-closed {
            background: #e5e7eb;
            color: #374151;
        }

        /* System Monitor */
        .monitor-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .system-card {
            background: white;
            padding: 1.5rem;
            border-radius: 1rem;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

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

        .system-name {
            font-weight: 700;
            font-size: 1.125rem;
        }

        .status-indicator {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            animation: pulse 2s infinite;
        }

        .status-operational {
            background: var(--primary-green);
        }

        .status-degraded {
            background: var(--primary-orange);
        }

        .status-down {
            background: var(--primary-red);
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }

        .system-metrics {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            margin-top: 1rem;
        }

        .metric {
            padding: 0.75rem;
            background: var(--bg-light);
            border-radius: 0.5rem;
        }

        .metric-label {
            font-size: 0.75rem;
            color: var(--text-light);
            margin-bottom: 0.25rem;
        }

        .metric-value {
            font-size: 1.5rem;
            font-weight: 700;
        }

        /* Knowledge Base */
        .kb-search {
            margin-bottom: 2rem;
        }

        .kb-search-input {
            width: 100%;
            padding: 1rem 1.5rem;
            border: 2px solid var(--border-color);
            border-radius: 0.75rem;
            font-size: 1rem;
        }

        .kb-search-input:focus {
            outline: none;
            border-color: var(--primary-blue);
        }

        .kb-categories {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .kb-category {
            background: white;
            padding: 1.5rem;
            border-radius: 1rem;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            cursor: pointer;
            transition: all 0.2s;
            text-align: center;
        }

        .kb-category:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        }

        .kb-category-icon {
            font-size: 2rem;
            margin-bottom: 0.5rem;
        }

        .kb-articles {
            display: grid;
            gap: 1rem;
        }

        .kb-article {
            background: white;
            padding: 1.5rem;
            border-radius: 1rem;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            cursor: pointer;
            transition: all 0.2s;
            border-left: 4px solid var(--primary-blue);
        }

        .kb-article:hover {
            transform: translateX(4px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        }

        .kb-article-title {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }

        .kb-article-excerpt {
            color: var(--text-light);
            font-size: 0.875rem;
        }

        .kb-article-meta {
            display: flex;
            gap: 1rem;
            margin-top: 0.75rem;
            font-size: 0.75rem;
            color: var(--text-light);
        }

        /* Modal */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            align-items: center;
            justify-content: center;
        }

        .modal.active {
            display: flex;
        }

        .modal-content {
            background: white;
            border-radius: 1rem;
            padding: 2rem;
            max-width: 600px;
            width: 90%;
            max-height: 90vh;
            overflow-y: auto;
        }

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

        .modal-title {
            font-size: 1.5rem;
            font-weight: 700;
        }

        .modal-close {
            cursor: pointer;
            font-size: 1.5rem;
            color: var(--text-light);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }

        .form-input,
        .form-select,
        .form-textarea {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 0.5rem;
            font-size: 1rem;
        }

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

        .form-input:focus,
        .form-select:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
        }

        /* Analytics Charts */
        .chart-container {
            background: white;
            padding: 1.5rem;
            border-radius: 1rem;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            margin-bottom: 1.5rem;
        }

        .chart-title {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .chart-placeholder {
            height: 300px;
            background: var(--bg-light);
            border-radius: 0.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .dashboard {
                grid-template-columns: 1fr;
            }

            .sidebar {
                display: none;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .header {
                flex-direction: column;
                gap: 1rem;
            }
        }

        .hidden {
            display: none;
        }