/* ============================================
           CSS VARIABLES - WHITE/LIGHT THEME
        ============================================ */
        :root {
            /* Light Theme Colors */
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --bg-tertiary: #f1f5f9;
            --bg-elevated: #ffffff;
            --bg-hover: #e2e8f0;
            
            /* Border Colors */
            --border-primary: #cbd5e1;
            --border-secondary: #94a3b8;
            --border-active: #3b82f6;
            --border-subtle: #e2e8f0;
            
            /* Text Colors */
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #64748b;
            --text-disabled: #94a3b8;
            
            /* Accent Colors */
            --accent-primary: #3b82f6;
            --accent-primary-hover: #2563eb;
            --accent-primary-light: rgba(59, 130, 246, 0.1);
            
            --accent-green: #10b981;
            --accent-green-light: rgba(16, 185, 129, 0.1);
            
            --accent-red: #ef4444;
            --accent-red-light: rgba(239, 68, 68, 0.1);
            
            --accent-orange: #f59e0b;
            --accent-orange-light: rgba(245, 158, 11, 0.1);
            
            --accent-purple: #8b5cf6;
            --accent-purple-light: rgba(139, 92, 246, 0.1);
            
            --accent-cyan: #06b6d4;
            --accent-cyan-light: rgba(6, 182, 212, 0.1);
            
            /* Cable Colors */
            --cable-ethernet: #3b82f6;
            --cable-fiber: #f59e0b;
            --cable-crossover: #ef4444;
            --cable-serial: #8b5cf6;
            --cable-console: #06b6d4;
            --cable-wireless: #10b981;
            
            /* Spacing */
            --space-1: 4px;
            --space-2: 8px;
            --space-3: 12px;
            --space-4: 16px;
            --space-5: 20px;
            --space-6: 24px;
            --space-8: 32px;
            
            /* Layout */
            --sidebar-width: 280px;
            --panel-width: 340px;
            --toolbar-height: 52px;
            --statusbar-height: 36px;
            
            /* Typography */
            --font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
            
            /* Transitions */
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
            --transition-slow: 0.4s ease;
        }

        /* ============================================
           RESET & BASE
        ============================================ */
        *, *::before, *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            font-size: 14px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.5;
            overflow: hidden;
            height: 100vh;
        }

        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-secondary);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--border-secondary);
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent-primary);
        }

        ::selection {
            background: var(--accent-primary);
            color: white;
        }

        /* ============================================
           APP LAYOUT
        ============================================ */
        .app-container {
            display: flex;
            height: 100vh;
            width: 100vw;
            overflow: hidden;
        }

        /* ============================================
           LEFT SIDEBAR
        ============================================ */
        .sidebar {
            width: var(--sidebar-width);
            min-width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-secondary);
            border-right: 1px solid var(--border-primary);
            display: flex;
            flex-direction: column;
            overflow: hidden;
            z-index: 100;
            transition: transform var(--transition-normal);
        }

        .sidebar-header {
            padding: var(--space-4);
            border-bottom: 1px solid var(--border-primary);
            background: var(--bg-primary);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* LOGO - Increased Size */
        .sidebar-logo {
            width: 64px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .sidebar-logo img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .sidebar-content {
            flex: 1;
            overflow-y: auto;
            overflow-x: hidden;
            padding: var(--space-2) 0;
        }

        /* Device Categories */
        .device-category {
            margin-bottom: var(--space-1);
        }

        .category-header {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            padding: var(--space-3) var(--space-4);
            color: var(--text-secondary);
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            cursor: pointer;
            transition: all var(--transition-fast);
            user-select: none;
            border-left: 3px solid transparent;
            background: var(--bg-tertiary);
        }

        .category-header:hover {
            background: var(--bg-hover);
            color: var(--text-primary);
            border-left-color: var(--accent-primary);
        }

        .category-header i:first-child {
            font-size: 1.1rem;
            color: var(--accent-primary);
        }

        .category-header span {
            flex: 1;
        }

        .category-header .chevron {
            transition: transform var(--transition-fast);
        }

        .category-header.collapsed .chevron {
            transform: rotate(-90deg);
        }

        .device-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-2);
            padding: var(--space-2) var(--space-3);
            background: var(--bg-primary);
            transition: all var(--transition-normal);
            max-height: 600px;
            overflow: hidden;
        }

        .device-grid.collapsed {
            max-height: 0;
            padding-top: 0;
            padding-bottom: 0;
            opacity: 0;
        }

        .device-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--space-1);
            padding: var(--space-3);
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            cursor: grab;
            transition: all var(--transition-fast);
            user-select: none;
        }

        .device-item:hover {
            background: var(--bg-hover);
            border-color: var(--accent-primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }

        .device-item:active {
            cursor: grabbing;
            transform: scale(0.95);
        }

        .device-icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
        }

        .device-icon.endpoint { color: var(--accent-primary); }
        .device-icon.network { color: var(--accent-green); }
        .device-icon.wireless { color: var(--accent-purple); }
        .device-icon.security { color: var(--accent-red); }
        .device-icon.cloud { color: var(--accent-cyan); }
        .device-icon.storage { color: var(--accent-orange); }

        .device-item .device-name {
            font-size: 0.7rem;
            color: var(--text-secondary);
            text-align: center;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            width: 100%;
            font-weight: 500;
        }

        /* ============================================
           MAIN CANVAS AREA
        ============================================ */
        .main-area {
            flex: 1;
            display: flex;
            flex-direction: column;
            overflow: hidden;
            min-width: 0;
        }

        /* Toolbar */
        .toolbar {
            height: var(--toolbar-height);
            min-height: var(--toolbar-height);
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-primary);
            display: flex;
            align-items: center;
            padding: 0 var(--space-3);
            gap: var(--space-3);
            overflow-x: auto;
            overflow-y: hidden;
        }

        .toolbar::-webkit-scrollbar {
            height: 4px;
        }

        .toolbar-group {
            display: flex;
            align-items: center;
            gap: var(--space-1);
            padding-right: var(--space-3);
            border-right: 1px solid var(--border-subtle);
        }

        .toolbar-group:last-child {
            border-right: none;
            padding-right: 0;
        }

        .tool-btn {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2) var(--space-3);
            background: transparent;
            border: 1px solid transparent;
            color: var(--text-secondary);
            font-size: 0.8rem;
            font-family: inherit;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .tool-btn i {
            font-size: 1.1rem;
        }

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

        .tool-btn.active {
            background: var(--accent-primary-light);
            color: var(--accent-primary);
            border-color: var(--accent-primary);
        }

        .tool-btn.success {
            background: var(--accent-green-light);
            color: var(--accent-green);
            border-color: var(--accent-green);
        }

        .tool-btn.success:hover {
            background: var(--accent-green);
            color: white;
        }

        .tool-btn.danger {
            color: var(--accent-red);
        }

        .tool-btn.danger:hover {
            background: var(--accent-red-light);
            border-color: var(--accent-red);
        }

        .tool-btn.icon-only {
            padding: var(--space-2);
        }

        .tool-btn.icon-only span {
            display: none;
        }

        .tool-select {
            padding: var(--space-2) var(--space-3);
            background: var(--bg-secondary);
            border: 1px solid var(--border-primary);
            color: var(--text-primary);
            font-size: 0.8rem;
            font-family: inherit;
            cursor: pointer;
            min-width: 140px;
        }

        .tool-select:focus {
            outline: none;
            border-color: var(--accent-primary);
        }

        /* Canvas Container */
        .canvas-container {
            flex: 1;
            position: relative;
            overflow: hidden;
            background: var(--bg-tertiary);
        }

        /* Zoom Wrapper */
        #zoomWrapper {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            transform-origin: center center;
            transition: transform 0.2s ease;
        }

        .canvas-grid {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(var(--border-subtle) 1px, transparent 1px),
                linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
            background-size: 20px 20px;
            pointer-events: none;
            opacity: 0.8;
        }

        #networkCanvas {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
        }

        /* Cable Styles */
        .cable-path {
            fill: none;
            stroke-width: 3;
            stroke-linecap: round;
            pointer-events: stroke;
            cursor: pointer;
        }

        .cable-path.cable-ethernet {
            stroke: var(--cable-ethernet);
            stroke-dasharray: none;
        }

        .cable-path.cable-fiber {
            stroke: var(--cable-fiber);
            stroke-width: 4;
        }

        .cable-path.cable-crossover {
            stroke: var(--cable-crossover);
            stroke-dasharray: 8 4;
        }

        .cable-path.cable-serial {
            stroke: var(--cable-serial);
            stroke-dasharray: 12 4 4 4;
        }

        .cable-path.cable-console {
            stroke: var(--cable-console);
            stroke-dasharray: 4 4;
        }

        .cable-path.cable-wireless {
            stroke: var(--cable-wireless);
            stroke-dasharray: 2 6;
            stroke-width: 2;
            opacity: 0.7;
        }

        /* Network Devices on Canvas */
        .network-device {
            position: absolute;
            width: 100px;
            background: var(--bg-primary);
            border: 2px solid var(--border-primary);
            cursor: move;
            user-select: none;
            z-index: 10;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .network-device:hover {
            border-color: var(--accent-primary);
            z-index: 20;
            box-shadow: 0 4px 16px rgba(0,0,0,0.1);
        }

        .network-device.selected {
            border-color: var(--accent-primary);
            outline: 2px solid var(--accent-primary);
            outline-offset: 2px;
        }

        .network-device .device-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-1) var(--space-2);
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-subtle);
        }

        .status-indicator {
            width: 8px;
            height: 8px;
            background: var(--text-muted);
        }

        .status-indicator.online {
            background: var(--accent-green);
            animation: pulse-status 2s infinite;
        }

        .status-indicator.offline {
            background: var(--accent-red);
        }

        .status-indicator.warning {
            background: var(--accent-orange);
        }

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

        .device-type-badge {
            font-size: 0.55rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.3px;
            font-weight: 600;
        }

        .network-device .device-icon-wrapper {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: var(--space-3) 0;
            font-size: 2.2rem;
        }

        .network-device .device-name {
            text-align: center;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 0 var(--space-2);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .network-device .device-ip {
            text-align: center;
            font-size: 0.65rem;
            color: var(--accent-primary);
            font-family: var(--font-mono);
            padding: var(--space-1) var(--space-2);
            font-weight: 500;
        }

        .network-device .device-mac {
            text-align: center;
            font-size: 0.55rem;
            color: var(--text-muted);
            font-family: var(--font-mono);
            padding: 0 var(--space-2) var(--space-2);
        }

        .ports-container {
            display: flex;
            justify-content: center;
            gap: 4px;
            padding: var(--space-2);
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
        }

        .port-indicator {
            width: 10px;
            height: 10px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .port-indicator:hover {
            background: var(--accent-primary-light);
            border-color: var(--accent-primary);
            transform: scale(1.2);
        }

        .port-indicator.connected {
            background: var(--accent-green);
            border-color: var(--accent-green);
        }

        .port-indicator.connecting {
            background: var(--accent-orange);
            border-color: var(--accent-orange);
            animation: port-blink 0.5s infinite;
        }

        @keyframes port-blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* Packet Animation */
        .packet {
            position: absolute;
            width: 10px;
            height: 10px;
            pointer-events: none;
            z-index: 50;
        }

        .packet::before {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            background: currentColor;
        }

        .packet.icmp { color: var(--accent-green); }
        .packet.tcp { color: var(--accent-primary); }
        .packet.udp { color: var(--accent-orange); }
        .packet.arp { color: var(--accent-purple); }

        /* Status Bar */
        .status-bar {
            height: var(--statusbar-height);
            min-height: var(--statusbar-height);
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-primary);
            display: flex;
            align-items: center;
            padding: 0 var(--space-4);
            gap: var(--space-4);
            font-size: 0.75rem;
        }

        .status-item {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            color: var(--text-muted);
        }

        .status-item i {
            font-size: 0.9rem;
        }

        .status-item.success i {
            color: var(--accent-green);
        }

        .status-item strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* ============================================
           RIGHT PANEL
        ============================================ */
        .right-panel {
            width: var(--panel-width);
            min-width: var(--panel-width);
            height: 100vh;
            background: var(--bg-secondary);
            border-left: 1px solid var(--border-primary);
            display: flex;
            flex-direction: column;
            overflow: hidden;
            z-index: 100;
            transition: transform var(--transition-normal);
        }

        .panel-header {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            padding: var(--space-4);
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-primary);
        }

        .panel-header i {
            font-size: 1.25rem;
            color: var(--accent-primary);
        }

        .panel-header h2 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .panel-tabs {
            display: flex;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-primary);
            overflow-x: auto;
        }

        .panel-tabs::-webkit-scrollbar {
            height: 2px;
        }

        .panel-tab {
            flex: 1;
            min-width: 60px;
            padding: var(--space-3);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--space-1);
            font-size: 0.65rem;
            color: var(--text-muted);
            cursor: pointer;
            transition: all var(--transition-fast);
            border-bottom: 2px solid transparent;
            text-transform: uppercase;
            letter-spacing: 0.3px;
            font-weight: 500;
        }

        .panel-tab i {
            font-size: 1rem;
        }

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

        .panel-tab.active {
            color: var(--accent-primary);
            border-bottom-color: var(--accent-primary);
            background: var(--bg-secondary);
        }

        .panel-content {
            flex: 1;
            overflow-y: auto;
            padding: var(--space-4);
        }

        .panel-section {
            display: none;
        }

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

        /* Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-3);
            margin-bottom: var(--space-4);
        }

        .stat-card {
            background: var(--bg-primary);
            border: 1px solid var(--border-subtle);
            padding: var(--space-3);
            text-align: center;
        }

        .stat-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-2);
            font-size: 1.1rem;
        }

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

        .stat-label {
            font-size: 0.65rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-top: var(--space-1);
            font-weight: 500;
        }

        /* Config Groups */
        .config-group {
            background: var(--bg-primary);
            border: 1px solid var(--border-subtle);
            margin-bottom: var(--space-4);
        }

        .config-group-header {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-3);
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-subtle);
        }

        .config-group-header i {
            color: var(--accent-primary);
            font-size: 1rem;
        }

        .config-group-header h4 {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .config-row {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            padding: var(--space-2) var(--space-3);
            border-bottom: 1px solid var(--border-subtle);
        }

        .config-row:last-child {
            border-bottom: none;
        }

        .config-row label {
            width: 70px;
            min-width: 70px;
            font-size: 0.75rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .config-row input,
        .config-row select {
            flex: 1;
            padding: var(--space-2);
            background: var(--bg-tertiary);
            border: 1px solid var(--border-primary);
            color: var(--text-primary);
            font-size: 0.8rem;
            font-family: var(--font-mono);
        }

        .config-row input:focus,
        .config-row select:focus {
            outline: none;
            border-color: var(--accent-primary);
        }

        .config-row input[readonly] {
            background: var(--bg-secondary);
            color: var(--text-muted);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: var(--space-2);
            padding: var(--space-2) var(--space-4);
            font-size: 0.8rem;
            font-family: inherit;
            font-weight: 500;
            cursor: pointer;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
            margin: var(--space-3);
        }

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

        .btn-primary:hover {
            background: var(--accent-primary-hover);
        }

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

        .btn-danger {
            background: transparent;
            color: var(--accent-red);
            border-color: var(--accent-red);
        }

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

        /* Interface List */
        .interface-item {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            padding: var(--space-3);
            border-bottom: 1px solid var(--border-subtle);
        }

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

        .interface-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            color: var(--accent-primary);
        }

        .interface-info {
            flex: 1;
            min-width: 0;
        }

        .interface-name {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-primary);
            font-family: var(--font-mono);
        }

        .interface-details {
            font-size: 0.7rem;
            color: var(--text-muted);
        }

        .interface-status {
            padding: var(--space-1) var(--space-2);
            font-size: 0.6rem;
            font-weight: 600;
            text-transform: uppercase;
        }

        .interface-status.up {
            background: var(--accent-green-light);
            color: var(--accent-green);
        }

        .interface-status.down {
            background: var(--accent-red-light);
            color: var(--accent-red);
        }

        /* Empty State */
        .empty-state {
            text-align: center;
            padding: var(--space-8);
            color: var(--text-muted);
        }

        .empty-state i {
            font-size: 3rem;
            margin-bottom: var(--space-4);
            opacity: 0.5;
        }

        .empty-state p {
            font-size: 0.9rem;
        }

        /* Data Tables */
        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.75rem;
        }

        .data-table th,
        .data-table td {
            padding: var(--space-2);
            text-align: left;
            border-bottom: 1px solid var(--border-subtle);
        }

        .data-table th {
            background: var(--bg-secondary);
            color: var(--text-muted);
            font-weight: 600;
            text-transform: uppercase;
            font-size: 0.65rem;
            letter-spacing: 0.5px;
        }

        .data-table td {
            color: var(--text-secondary);
            font-family: var(--font-mono);
        }

        /* VLAN Entries */
        .vlan-entry {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            padding: var(--space-3);
            border-bottom: 1px solid var(--border-subtle);
        }

        .vlan-color {
            width: 4px;
            height: 36px;
        }

        .vlan-info {
            flex: 1;
        }

        .vlan-name {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .vlan-id {
            font-size: 0.7rem;
            color: var(--text-muted);
        }

        .vlan-ports {
            font-size: 0.7rem;
            color: var(--accent-primary);
            font-family: var(--font-mono);
        }

        /* Firewall Rules */
        .firewall-rule {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2) var(--space-3);
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.75rem;
        }

        .rule-number {
            width: 28px;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }

        .rule-action {
            padding: 2px 6px;
            font-size: 0.6rem;
            font-weight: 600;
            text-transform: uppercase;
        }

        .rule-action.allow {
            background: var(--accent-green-light);
            color: var(--accent-green);
        }

        .rule-action.deny {
            background: var(--accent-red-light);
            color: var(--accent-red);
        }

        .rule-protocol {
            width: 40px;
            color: var(--accent-primary);
            font-weight: 600;
        }

        .rule-details {
            flex: 1;
            color: var(--text-secondary);
            font-family: var(--font-mono);
        }

        .rule-delete {
            color: var(--text-muted);
            cursor: pointer;
            padding: var(--space-1);
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

        .firewall-rule:hover .rule-delete {
            opacity: 1;
        }

        .rule-delete:hover {
            color: var(--accent-red);
        }

        /* Terminal */
        .terminal {
            background: #1e1e1e;
            border: 1px solid var(--border-primary);
            font-family: var(--font-mono);
            overflow: hidden;
        }

        .terminal.fullscreen {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 100000;
            border: none;
        }

        .terminal-header {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2) var(--space-3);
            background: #2d2d2d;
            border-bottom: 1px solid #3d3d3d;
        }

        .terminal-dot {
            width: 12px;
            height: 12px;
        }

        .terminal-dot.red { background: #ff5f56; }
        .terminal-dot.yellow { background: #ffbd2e; }
        .terminal-dot.green { background: #27c93f; }

        .terminal-title {
            flex: 1;
            font-size: 0.75rem;
            color: #888;
            text-align: center;
        }

        .terminal-fullscreen-btn {
            background: transparent;
            border: none;
            color: #888;
            cursor: pointer;
            padding: var(--space-1);
            font-size: 1rem;
            transition: color var(--transition-fast);
        }

        .terminal-fullscreen-btn:hover {
            color: white;
        }

        .terminal-body {
            height: 200px;
            overflow-y: auto;
            padding: var(--space-3);
            font-size: 0.8rem;
            line-height: 1.6;
            background: #1e1e1e;
        }

        .terminal.fullscreen .terminal-body {
            height: calc(100vh - 80px);
        }

        .terminal-line {
            color: #d4d4d4;
            white-space: pre-wrap;
            word-break: break-all;
        }

        .terminal-line.command::before {
            content: '$ ';
            color: var(--accent-green);
        }

        .terminal-line.output { color: #d4d4d4; }
        .terminal-line.error { color: #f44747; }
        .terminal-line.success { color: #4ec9b0; }
        .terminal-line.warning { color: #ce9178; }
        .terminal-line.info { color: #569cd6; }

        .terminal-input-wrapper {
            display: flex;
            align-items: center;
            padding: var(--space-2) var(--space-3);
            background: #252526;
            border-top: 1px solid #3d3d3d;
        }

        .terminal-prompt {
            color: var(--accent-green);
            margin-right: var(--space-2);
            font-weight: bold;
        }

        .terminal-input {
            flex: 1;
            background: transparent;
            border: none;
            color: #fff;
            font-family: var(--font-mono);
            font-size: 0.85rem;
            outline: none;
        }

        /* Quick Commands */
        .quick-commands {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-2);
            padding: var(--space-3);
        }

        .quick-cmd {
            padding: var(--space-2) var(--space-3);
            background: var(--bg-tertiary);
            border: 1px solid var(--border-primary);
            color: var(--text-secondary);
            font-family: var(--font-mono);
            font-size: 0.7rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .quick-cmd:hover {
            background: var(--bg-hover);
            border-color: var(--accent-primary);
            color: var(--text-primary);
        }

        /* ============================================
           CONTEXT MENU
        ============================================ */
        .context-menu {
            position: fixed;
            background: var(--bg-elevated);
            border: 1px solid var(--border-primary);
            min-width: 200px;
            z-index: 100000;
            opacity: 0;
            visibility: hidden;
            transform: scale(0.95) translateY(-10px);
            transform-origin: top left;
            transition: all var(--transition-fast);
            box-shadow: 0 8px 32px rgba(0,0,0,0.15);
        }

        .context-menu.active {
            opacity: 1;
            visibility: visible;
            transform: scale(1) translateY(0);
        }

        .context-menu-item {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            padding: var(--space-3) var(--space-4);
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            font-size: 0.85rem;
        }

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

        .context-menu-item.danger {
            color: var(--accent-red);
        }

        .context-menu-item.danger:hover {
            background: var(--accent-red-light);
        }

        .context-menu-item i {
            width: 18px;
            font-size: 1rem;
        }

        .context-menu-separator {
            height: 1px;
            background: var(--border-subtle);
            margin: var(--space-1) 0;
        }

        /* ============================================
           MODALS
        ============================================ */
        .modal {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 100000;
            opacity: 0;
            visibility: hidden;
            transition: all var(--transition-normal);
        }

        .modal.active {
            opacity: 1;
            visibility: visible;
        }

        .modal-content {
            background: var(--bg-primary);
            border: 1px solid var(--border-primary);
            width: 90%;
            max-width: 500px;
            max-height: 90vh;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transform: scale(0.9) translateY(20px);
            transition: transform var(--transition-normal);
            box-shadow: 0 16px 48px rgba(0,0,0,0.2);
        }

        .modal.active .modal-content {
            transform: scale(1) translateY(0);
        }

        .modal-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-4);
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-primary);
        }

        .modal-header h3 {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .modal-header h3 i {
            color: var(--accent-primary);
        }

        .modal-close {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid transparent;
            color: var(--text-muted);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .modal-close:hover {
            background: var(--bg-hover);
            color: var(--accent-red);
            border-color: var(--accent-red);
        }

        .modal-body {
            padding: var(--space-4);
            overflow-y: auto;
        }

        /* Save Modal Specific Styles */
        .save-format-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-4);
            margin-bottom: var(--space-4);
        }

        .save-format-option {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--space-3);
            padding: var(--space-5);
            background: var(--bg-secondary);
            border: 2px solid var(--border-primary);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .save-format-option:hover {
            border-color: var(--accent-primary);
            background: var(--accent-primary-light);
            transform: translateY(-2px);
        }

        .save-format-option.selected {
            border-color: var(--accent-primary);
            background: var(--accent-primary-light);
        }

        .save-format-option i {
            font-size: 2.5rem;
            color: var(--accent-primary);
        }

        .save-format-option span {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .save-format-option small {
            font-size: 0.7rem;
            color: var(--text-muted);
        }

        .save-name-input {
            display: none;
            margin-top: var(--space-4);
        }

        .save-name-input.active {
            display: block;
        }

        .save-name-input label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: var(--space-2);
        }

        .save-name-input input {
            width: 100%;
            padding: var(--space-3);
            background: var(--bg-tertiary);
            border: 1px solid var(--border-primary);
            color: var(--text-primary);
            font-size: 1rem;
            font-family: inherit;
        }

        .save-name-input input:focus {
            outline: none;
            border-color: var(--accent-primary);
        }

        .save-modal-actions {
            display: flex;
            gap: var(--space-3);
            margin-top: var(--space-4);
        }

        .save-modal-actions .btn {
            flex: 1;
            margin: 0;
            padding: var(--space-3);
        }

        /* Subnet Results */
        .subnet-results {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-2);
            margin-top: var(--space-4);
        }

        .subnet-result-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            padding: var(--space-3);
        }

        .subnet-result-label {
            font-size: 0.7rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: var(--space-1);
            font-weight: 500;
        }

        .subnet-result-value {
            font-family: var(--font-mono);
            font-size: 0.85rem;
            color: var(--accent-primary);
            font-weight: 600;
        }

        /* ============================================
           TOAST NOTIFICATIONS
        ============================================ */
        .toast-container {
            position: fixed;
            top: var(--space-4);
            right: var(--space-4);
            z-index: 1000000;
            display: flex;
            flex-direction: column;
            gap: var(--space-2);
        }

        .toast {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            padding: var(--space-3) var(--space-4);
            background: var(--bg-elevated);
            border: 1px solid var(--border-primary);
            border-left-width: 4px;
            min-width: 300px;
            max-width: 420px;
            animation: toastSlideIn 0.3s ease;
            transition: all var(--transition-normal);
            box-shadow: 0 4px 16px rgba(0,0,0,0.1);
        }

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

        .toast i {
            font-size: 1.2rem;
        }

        .toast.success {
            border-left-color: var(--accent-green);
        }

        .toast.success i {
            color: var(--accent-green);
        }

        .toast.error {
            border-left-color: var(--accent-red);
        }

        .toast.error i {
            color: var(--accent-red);
        }

        .toast.warning {
            border-left-color: var(--accent-orange);
        }

        .toast.warning i {
            color: var(--accent-orange);
        }

        .toast.info {
            border-left-color: var(--accent-primary);
        }

        .toast.info i {
            color: var(--accent-primary);
        }

        .toast-message {
            flex: 1;
            font-size: 0.85rem;
            color: var(--text-primary);
        }

        /* ============================================
           MOBILE TOGGLES
        ============================================ */
        .sidebar-toggle,
        .panel-toggle {
            display: none;
            position: fixed;
            z-index: 200;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: var(--bg-elevated);
            border: 1px solid var(--border-primary);
            color: var(--text-primary);
            font-size: 1.25rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .sidebar-toggle {
            top: var(--space-2);
            left: var(--space-2);
        }

        .panel-toggle {
            top: var(--space-2);
            right: var(--space-2);
        }

        .sidebar-toggle:hover,
        .panel-toggle:hover {
            background: var(--accent-primary);
            border-color: var(--accent-primary);
            color: white;
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 90;
            opacity: 0;
            transition: opacity var(--transition-normal);
        }

        .sidebar-overlay.active {
            opacity: 1;
        }

        /* ============================================
           RESPONSIVE STYLES
        ============================================ */
        @media (max-width: 1200px) {
            :root {
                --panel-width: 300px;
            }
        }

        @media (max-width: 900px) {
            .sidebar-toggle,
            .panel-toggle {
                display: flex;
            }

            .sidebar-overlay {
                display: block;
            }

            .sidebar {
                position: fixed;
                left: 0;
                top: 0;
                transform: translateX(-100%);
            }

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

            .right-panel {
                position: fixed;
                right: 0;
                top: 0;
                transform: translateX(100%);
            }

            .right-panel.open {
                transform: translateX(0);
            }

            .toolbar {
                padding-left: 60px;
            }

            .tool-btn span {
                display: none;
            }

            .tool-btn {
                padding: var(--space-2);
            }
        }

        @media (max-width: 600px) {
            :root {
                --sidebar-width: 100%;
                --panel-width: 100%;
            }

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

            .modal-content {
                width: 95%;
                max-height: 95vh;
            }

            .subnet-results {
                grid-template-columns: 1fr;
            }

            .save-format-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Fullscreen styles */
        .app-container.fullscreen {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 10000;
        }