/* ============================================
           FONTS
        ============================================ */
        @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

        /* ============================================
           CSS VARIABLES
        ============================================ */
        :root {
            /* Colors */
            --bg-primary: #f8fafc;
            --bg-secondary: #ffffff;
            --bg-tertiary: #f1f5f9;
            --bg-hover: #e2e8f0;
            
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --border-dark: #cbd5e1;
            
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #cbd5e1;
            
            --accent-primary: #3b82f6;
            --accent-primary-hover: #2563eb;
            --accent-primary-light: #eff6ff;
            --accent-primary-dark: #1d4ed8;
            
            --accent-green: #10b981;
            --accent-green-light: #ecfdf5;
            --accent-green-dark: #059669;
            
            --accent-red: #ef4444;
            --accent-red-light: #fef2f2;
            --accent-red-dark: #dc2626;
            
            --accent-orange: #f59e0b;
            --accent-orange-light: #fffbeb;
            --accent-orange-dark: #d97706;
            
            --accent-purple: #8b5cf6;
            --accent-purple-light: #f5f3ff;
            --accent-purple-dark: #7c3aed;
            
            --accent-cyan: #06b6d4;
            --accent-cyan-light: #ecfeff;
            --accent-cyan-dark: #0891b2;
            
            --accent-pink: #ec4899;
            --accent-pink-light: #fdf2f8;
            
            /* Shadows */
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
            --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.2);
            --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.04);
            --shadow-colored: 0 4px 14px rgba(59, 130, 246, 0.25);
            
            /* Border Radius */
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --radius-2xl: 20px;
            --radius-full: 9999px;
            
            /* Spacing */
            --space-1: 4px;
            --space-2: 8px;
            --space-3: 12px;
            --space-4: 16px;
            --space-5: 20px;
            --space-6: 24px;
            --space-8: 32px;
            --space-10: 40px;
            
            /* Sizing */
            --sidebar-width: 240px;
            --right-panel-width: 340px;
            --toolbar-height: 52px;
            --status-bar-height: 32px;
            
            /* Transitions */
            --transition-fast: 0.15s ease;
            --transition-normal: 0.2s ease;
            --transition-slow: 0.3s ease;
            
            /* Z-Index */
            --z-dropdown: 100;
            --z-sticky: 200;
            --z-modal: 500;
            --z-toast: 600;
            --z-tooltip: 700;
        }

        /* ============================================
           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;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.5;
            overflow: hidden;
            min-height: 100vh;
            min-height: 100dvh;
        }

        /* ============================================
           SCROLLBAR
        ============================================ */
        ::-webkit-scrollbar {
            width: 5px;
            height: 5px;
        }

        ::-webkit-scrollbar-track {
            background: transparent;
        }

        ::-webkit-scrollbar-thumb {
            background: var(--border-dark);
            border-radius: var(--radius-full);
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* Firefox */
        * {
            scrollbar-width: thin;
            scrollbar-color: var(--border-dark) transparent;
        }

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

        /* ============================================
           LEFT SIDEBAR
        ============================================ */
        .sidebar {
            width: var(--sidebar-width);
            min-width: var(--sidebar-width);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: var(--z-sticky);
            transition: transform var(--transition-slow), width var(--transition-slow);
        }

        /* Sidebar Header with Logo */
        .sidebar-header {
            padding: var(--space-4) var(--space-4);
            color: white;
            flex-shrink: 0;
        }
  
        .sidebar-logo {
            width: 150px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            flex-shrink: 0;
        }

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

        .sidebar-logo i {
            font-size: 20px;
        }

        /* Sidebar Content */
        .sidebar-content {
            flex: 1;
            overflow-y: auto;
            overflow-x: hidden;
            padding: var(--space-3);
        }

        /* Device Categories */
        .device-category {
            margin-bottom: var(--space-3);
        }

        .category-header {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2) var(--space-3);
            background: var(--bg-tertiary);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-fast);
            user-select: none;
        }

        .category-header:hover {
            background: var(--bg-hover);
        }

        .category-header i {
            font-size: 0.875rem;
            color: var(--accent-primary);
            width: 16px;
            text-align: center;
        }

        .category-header span {
            flex: 1;
            font-size: 0.6875rem;
            font-weight: 600;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .category-header .chevron {
            font-size: 0.875rem;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
        }

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

        /* Device Grid */
        .device-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-2);
            margin-top: var(--space-2);
            padding: 0 var(--space-1);
        }

        .device-grid.collapsed {
            display: none;
        }

        /* Device Items */
        .device-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--space-2) var(--space-1);
            text-align: center;
            cursor: grab;
            transition: all var(--transition-fast);
            user-select: none;
        }

        .device-item:hover {
            border-color: var(--accent-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .device-item:active {
            cursor: grabbing;
            transform: scale(0.97);
        }

        .device-item .device-icon {
            width: 32px;
            height: 32px;
            margin: 0 auto var(--space-1);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 1rem;
        }

        .device-item .device-name {
            font-size: 0.625rem;
            font-weight: 500;
            color: var(--text-secondary);
            line-height: 1.3;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* Device Icon Colors */
        .device-icon.endpoint {
            background: var(--accent-primary-light);
            color: var(--accent-primary);
        }

        .device-icon.network {
            background: var(--accent-green-light);
            color: var(--accent-green);
        }

        .device-icon.security {
            background: var(--accent-red-light);
            color: var(--accent-red);
        }

        .device-icon.cloud {
            background: var(--accent-purple-light);
            color: var(--accent-purple);
        }

        .device-icon.wireless {
            background: var(--accent-cyan-light);
            color: var(--accent-cyan);
        }

        /* Mobile Sidebar Toggle */
        .sidebar-toggle {
            display: none;
            position: fixed;
            top: var(--space-3);
            left: var(--space-3);
            z-index: calc(var(--z-sticky) + 1);
            width: 40px;
            height: 40px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-primary);
            cursor: pointer;
            box-shadow: var(--shadow-md);
            align-items: center;
            justify-content: center;
            font-size: 1.125rem;
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: calc(var(--z-sticky) - 1);
            backdrop-filter: blur(2px);
        }

        /* ============================================
           MAIN AREA
        ============================================ */
        .main-area {
            flex: 1;
            display: flex;
            flex-direction: column;
            min-width: 0;
            background: var(--bg-primary);
        }

        /* ============================================
           TOOLBAR
        ============================================ */
        .toolbar {
            height: var(--toolbar-height);
            min-height: var(--toolbar-height);
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            padding: 0 var(--space-3);
            gap: var(--space-2);
            overflow-x: auto;
            overflow-y: hidden;
            flex-shrink: 0;
        }

        .toolbar::-webkit-scrollbar {
            height: 0;
        }

        .toolbar-group {
            display: flex;
            align-items: center;
            gap: var(--space-1);
            flex-shrink: 0;
        }

        .toolbar-group:not(:last-child)::after {
            content: '';
            width: 1px;
            height: 24px;
            background: var(--border-color);
            margin-left: var(--space-2);
        }

        /* Tool Buttons */
        .tool-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: var(--space-1);
            height: 32px;
            padding: 0 var(--space-3);
            background: var(--bg-tertiary);
            border: 1px solid transparent;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.75rem;
            font-weight: 500;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .tool-btn i {
            font-size: 0.875rem;
        }

        .tool-btn span {
            display: inline;
        }

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

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

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

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

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

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

        .tool-btn.icon-only {
            padding: 0;
            width: 32px;
        }

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

        /* Tool Select */
        .tool-select {
            height: 32px;
            padding: 0 var(--space-3);
            padding-right: var(--space-6);
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 0.75rem;
            font-weight: 500;
            cursor: pointer;
            outline: none;
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2364748b'%3E%3Cpath d='M12 15l-5-5h10z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 8px center;
            background-size: 12px;
        }

        .tool-select:focus {
            border-color: var(--accent-primary);
        }

        /* ============================================
           CANVAS CONTAINER
        ============================================ */
        .canvas-container {
            flex: 1;
            position: relative;
            overflow: hidden;
            background: var(--bg-primary);
        }

        .canvas-grid {
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle, var(--border-color) 1px, transparent 1px);
            background-size: 20px 20px;
            pointer-events: none;
            opacity: 0.8;
        }

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

        /* ============================================
           NETWORK DEVICES ON CANVAS
        ============================================ */
        .network-device {
            position: absolute;
            background: var(--bg-secondary);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: var(--space-3);
            text-align: center;
            cursor: move;
            min-width: 90px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            z-index: 10;
            box-shadow: var(--shadow-sm);
            user-select: none;
        }

        .network-device:hover {
            border-color: var(--accent-primary);
            box-shadow: var(--shadow-lg);
        }

        .network-device.selected {
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 3px var(--accent-primary-light), var(--shadow-lg);
        }

        .network-device .device-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: var(--space-2);
        }

        .network-device .status-indicator {
            width: 8px;
            height: 8px;
            border-radius: var(--radius-full);
            flex-shrink: 0;
        }

        .status-indicator.online {
            background: var(--accent-green);
            box-shadow: 0 0 6px var(--accent-green);
            animation: pulse-green 2s infinite;
        }

        .status-indicator.offline {
            background: var(--accent-red);
            box-shadow: 0 0 6px var(--accent-red);
        }

        .status-indicator.warning {
            background: var(--accent-orange);
            box-shadow: 0 0 6px var(--accent-orange);
            animation: pulse-orange 1.5s infinite;
        }

        @keyframes pulse-green {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.6; }
        }

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

        .network-device .device-type-badge {
            font-size: 0.5rem;
            padding: 2px 5px;
            background: var(--bg-tertiary);
            border-radius: var(--radius-full);
            color: var(--text-muted);
            text-transform: uppercase;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .network-device .device-icon-wrapper {
            width: 40px;
            height: 40px;
            margin: 0 auto var(--space-2);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            font-size: 1.25rem;
        }

        .network-device .device-name {
            font-size: 0.6875rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .network-device .device-ip {
            font-size: 0.625rem;
            color: var(--accent-primary);
            font-family: 'JetBrains Mono', monospace;
        }

        .network-device .device-mac {
            font-size: 0.5rem;
            color: var(--text-muted);
            font-family: 'JetBrains Mono', monospace;
            margin-top: 1px;
        }

        /* Port Indicators */
        .ports-container {
            display: flex;
            justify-content: center;
            gap: 4px;
            margin-top: var(--space-2);
            padding-top: var(--space-2);
            border-top: 1px solid var(--border-light);
        }

        .port-indicator {
            width: 10px;
            height: 10px;
            background: var(--bg-tertiary);
            border: 1.5px solid var(--border-color);
            border-radius: 2px;
            cursor: crosshair;
            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: blink 0.5s infinite;
        }

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        /* ============================================
           CABLE CONNECTIONS
        ============================================ */
        .cable-path {
            fill: none;
            stroke-width: 2.5;
            stroke-linecap: round;
            pointer-events: stroke;
            cursor: pointer;
            transition: stroke-width var(--transition-fast);
        }

        .cable-path:hover {
            stroke-width: 4;
        }

        .cable-ethernet { stroke: var(--accent-primary); }
        .cable-fiber { stroke: var(--accent-green); stroke-width: 3; }
        .cable-crossover { stroke: var(--accent-red); }
        .cable-serial { stroke: var(--accent-orange); stroke-dasharray: 6, 3; }
        .cable-console { stroke: var(--accent-cyan); stroke-dasharray: 2, 2; }
        .cable-wireless { stroke: var(--accent-purple); stroke-dasharray: 4, 4; opacity: 0.7; }

        /* ============================================
           RIGHT PANEL
        ============================================ */
        .right-panel {
            width: var(--right-panel-width);
            min-width: var(--right-panel-width);
            background: var(--bg-secondary);
            border-left: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: var(--z-sticky);
            transition: transform var(--transition-slow), width var(--transition-slow);
        }

        .panel-header {
            padding: var(--space-3) var(--space-4);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: var(--space-2);
            flex-shrink: 0;
        }

        .panel-header i {
            font-size: 1.125rem;
            color: var(--accent-primary);
        }

        .panel-header h2 {
            font-size: 0.9375rem;
            font-weight: 600;
        }

        /* Right Panel Toggle (Mobile) */
        .panel-toggle {
            display: none;
            position: fixed;
            top: var(--space-3);
            right: var(--space-3);
            z-index: calc(var(--z-sticky) + 1);
            width: 40px;
            height: 40px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-primary);
            cursor: pointer;
            box-shadow: var(--shadow-md);
            align-items: center;
            justify-content: center;
            font-size: 1.125rem;
        }

        /* Panel Tabs */
        .panel-tabs {
            display: flex;
            border-bottom: 1px solid var(--border-color);
            background: var(--bg-tertiary);
            flex-shrink: 0;
            overflow-x: auto;
        }

        .panel-tabs::-webkit-scrollbar {
            height: 0;
        }

        .panel-tab {
            flex: 1;
            min-width: 0;
            padding: var(--space-2) var(--space-1);
            text-align: center;
            cursor: pointer;
            font-size: 0.625rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 2px solid transparent;
            transition: all var(--transition-fast);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            white-space: nowrap;
        }

        .panel-tab i {
            font-size: 0.9375rem;
        }

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

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

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

        .panel-section {
            display: none;
        }

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

        /* Config Groups */
        .config-group {
            margin-bottom: var(--space-5);
        }

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

        .config-group-header i {
            font-size: 0.9375rem;
            color: var(--accent-primary);
        }

        .config-group-header h4 {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        /* Config Rows */
        .config-row {
            display: flex;
            align-items: center;
            margin-bottom: var(--space-2);
            gap: var(--space-2);
        }

        .config-row label {
            width: 80px;
            min-width: 80px;
            font-size: 0.6875rem;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .config-row input,
        .config-row select {
            flex: 1;
            height: 32px;
            padding: 0 var(--space-2);
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.75rem;
            color: var(--text-primary);
            font-family: 'JetBrains Mono', monospace;
            transition: all var(--transition-fast);
            min-width: 0;
        }

        .config-row input:focus,
        .config-row select:focus {
            outline: none;
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 2px var(--accent-primary-light);
        }

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

        /* ============================================
           BUTTONS
        ============================================ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: var(--space-2);
            height: 36px;
            padding: 0 var(--space-4);
            border: none;
            border-radius: var(--radius-md);
            font-size: 0.75rem;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-fast);
            width: 100%;
            margin-top: var(--space-2);
        }

        .btn i {
            font-size: 0.9375rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-primary-dark) 100%);
            color: white;
            box-shadow: var(--shadow-colored);
        }

        .btn-primary:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(59, 130, 246, 0.35);
        }

        .btn-success {
            background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-dark) 100%);
            color: white;
        }

        .btn-danger {
            background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-red-dark) 100%);
            color: white;
        }

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

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

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

        .stat-card {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: var(--space-3);
            text-align: center;
        }

        .stat-card .stat-icon {
            width: 28px;
            height: 28px;
            margin: 0 auto var(--space-1);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
        }

        .stat-card .stat-value {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            font-family: 'JetBrains Mono', monospace;
        }

        .stat-card .stat-label {
            font-size: 0.5625rem;
            color: var(--text-muted);
            margin-top: 2px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        /* ============================================
           TERMINAL
        ============================================ */
        .terminal {
            background: #1e293b;
            border-radius: var(--radius-md);
            overflow: hidden;
            font-family: 'JetBrains Mono', monospace;
            font-size: 0.6875rem;
        }

        .terminal-header {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: var(--space-2) var(--space-3);
            background: #0f172a;
        }

        .terminal-dot {
            width: 10px;
            height: 10px;
            border-radius: var(--radius-full);
        }

        .terminal-dot.red { background: #ef4444; }
        .terminal-dot.yellow { background: #f59e0b; }
        .terminal-dot.green { background: #10b981; }

        .terminal-title {
            color: #64748b;
            font-size: 0.625rem;
            margin-left: 6px;
        }

        .terminal-body {
            padding: var(--space-3);
            height: 180px;
            overflow-y: auto;
            color: #e2e8f0;
        }

        .terminal-line {
            margin-bottom: 3px;
            line-height: 1.5;
            word-break: break-all;
        }

        .terminal-line.command { color: #10b981; }
        .terminal-line.command::before { content: '$ '; color: #10b981; }
        .terminal-line.output { color: #e2e8f0; padding-left: 10px; }
        .terminal-line.error { color: #ef4444; }
        .terminal-line.info { color: #3b82f6; }
        .terminal-line.success { color: #10b981; }
        .terminal-line.warning { color: #f59e0b; }

        .terminal-input-wrapper {
            display: flex;
            align-items: center;
            padding: var(--space-2) var(--space-3);
            background: #0f172a;
            border-top: 1px solid #334155;
        }

        .terminal-prompt {
            color: #10b981;
            margin-right: 6px;
        }

        .terminal-input {
            flex: 1;
            background: transparent;
            border: none;
            color: #e2e8f0;
            font-family: 'JetBrains Mono', monospace;
            font-size: 0.6875rem;
            outline: none;
        }

        /* ============================================
           DATA TABLES
        ============================================ */
        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.625rem;
        }

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

        .data-table th {
            background: var(--bg-tertiary);
            font-weight: 600;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.3px;
            font-size: 0.5625rem;
        }

        .data-table tr:hover {
            background: var(--bg-tertiary);
        }

        .data-table td {
            font-family: 'JetBrains Mono', monospace;
        }

        /* ============================================
           VLAN ENTRIES
        ============================================ */
        .vlan-entry {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2);
            background: var(--bg-tertiary);
            border-radius: var(--radius-md);
            margin-bottom: var(--space-2);
        }

        .vlan-color {
            width: 18px;
            height: 18px;
            border-radius: var(--radius-xs);
            flex-shrink: 0;
        }

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

        .vlan-name {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .vlan-id {
            font-size: 0.625rem;
            color: var(--text-muted);
            font-family: 'JetBrains Mono', monospace;
        }

        .vlan-ports {
            font-size: 0.5625rem;
            color: var(--text-secondary);
            background: var(--bg-secondary);
            padding: 2px 6px;
            border-radius: var(--radius-xs);
            flex-shrink: 0;
        }

        /* ============================================
           FIREWALL RULES
        ============================================ */
        .firewall-rule {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2);
            background: var(--bg-tertiary);
            border-radius: var(--radius-md);
            margin-bottom: var(--space-2);
            font-size: 0.6875rem;
        }

        .rule-number {
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-secondary);
            border-radius: var(--radius-xs);
            font-size: 0.5625rem;
            font-weight: 600;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .rule-action {
            padding: 2px 6px;
            border-radius: var(--radius-xs);
            font-size: 0.5rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.3px;
            flex-shrink: 0;
        }

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

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

        .rule-protocol {
            padding: 2px 6px;
            background: var(--bg-secondary);
            border-radius: var(--radius-xs);
            font-family: 'JetBrains Mono', monospace;
            font-size: 0.5625rem;
            flex-shrink: 0;
        }

        .rule-details {
            flex: 1;
            font-family: 'JetBrains Mono', monospace;
            color: var(--text-secondary);
            font-size: 0.625rem;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .rule-delete {
            color: var(--text-muted);
            cursor: pointer;
            padding: 2px;
            flex-shrink: 0;
        }

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

        /* ============================================
           INTERFACE LIST
        ============================================ */
        .interface-item {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2);
            background: var(--bg-tertiary);
            border-radius: var(--radius-md);
            margin-bottom: var(--space-2);
        }

        .interface-icon {
            width: 26px;
            height: 26px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-secondary);
            border-radius: var(--radius-xs);
            font-size: 0.875rem;
            color: var(--accent-primary);
            flex-shrink: 0;
        }

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

        .interface-name {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .interface-details {
            font-size: 0.5625rem;
            color: var(--text-muted);
            font-family: 'JetBrains Mono', monospace;
        }

        .interface-status {
            padding: 2px 6px;
            border-radius: var(--radius-xs);
            font-size: 0.5rem;
            font-weight: 600;
            text-transform: uppercase;
            flex-shrink: 0;
        }

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

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

        /* ============================================
           QUICK COMMANDS
        ============================================ */
        .quick-commands {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-2);
        }

        .quick-cmd {
            padding: var(--space-2);
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.5625rem;
            font-family: 'JetBrains Mono', monospace;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: left;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

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

        /* ============================================
           EMPTY STATE
        ============================================ */
        .empty-state {
            text-align: center;
            padding: var(--space-8) var(--space-4);
            color: var(--text-muted);
        }

        .empty-state i {
            font-size: 2.5rem;
            margin-bottom: var(--space-3);
            opacity: 0.4;
        }

        .empty-state p {
            font-size: 0.75rem;
        }

        /* ============================================
           STATUS BAR
        ============================================ */
        .status-bar {
            height: var(--status-bar-height);
            min-height: var(--status-bar-height);
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            padding: 0 var(--space-3);
            font-size: 0.6875rem;
            color: var(--text-secondary);
            gap: var(--space-4);
            overflow-x: auto;
            flex-shrink: 0;
        }

        .status-bar::-webkit-scrollbar {
            height: 0;
        }

        .status-item {
            display: flex;
            align-items: center;
            gap: var(--space-1);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .status-item i {
            font-size: 0.8125rem;
        }

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

        .status-item strong {
            font-weight: 600;
            color: var(--text-primary);
            font-family: 'JetBrains Mono', monospace;
        }

        /* ============================================
           CONTEXT MENU
        ============================================ */
        .context-menu {
            display: none;
            position: fixed;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--space-1) 0;
            z-index: var(--z-dropdown);
            min-width: 180px;
            box-shadow: var(--shadow-xl);
        }

        .context-menu.active {
            display: block;
        }

        .context-menu-item {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2) var(--space-3);
            cursor: pointer;
            font-size: 0.75rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .context-menu-item i {
            font-size: 0.875rem;
            width: 16px;
            text-align: center;
        }

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

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

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

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

        /* ============================================
           MODALS
        ============================================ */
        .modal {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            backdrop-filter: blur(4px);
            z-index: var(--z-modal);
            justify-content: center;
            align-items: center;
            padding: var(--space-4);
        }

        .modal.active {
            display: flex;
        }

        .modal-content {
            background: var(--bg-secondary);
            border-radius: var(--radius-xl);
            width: 100%;
            max-width: 480px;
            max-height: 85vh;
            overflow: hidden;
            box-shadow: var(--shadow-2xl);
            display: flex;
            flex-direction: column;
        }

        .modal-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-4);
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }

        .modal-header h3 {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            font-size: 1rem;
            font-weight: 600;
        }

        .modal-header h3 i {
            font-size: 1.25rem;
            color: var(--accent-primary);
        }

        .modal-close {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-tertiary);
            border: none;
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            cursor: pointer;
            font-size: 1.125rem;
            transition: all var(--transition-fast);
        }

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

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

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

        .subnet-result-item {
            padding: var(--space-3);
            background: var(--bg-tertiary);
            border-radius: var(--radius-md);
        }

        .subnet-result-label {
            font-size: 0.5625rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 2px;
        }

        .subnet-result-value {
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--text-primary);
            font-family: 'JetBrains Mono', monospace;
        }

        /* ============================================
           TOAST NOTIFICATIONS
        ============================================ */
        .toast-container {
            position: fixed;
            bottom: calc(var(--status-bar-height) + var(--space-4));
            right: var(--space-4);
            z-index: var(--z-toast);
            display: flex;
            flex-direction: column;
            gap: var(--space-2);
            pointer-events: none;
        }

        .toast {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-3) var(--space-4);
            background: var(--bg-secondary);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            border-left: 3px solid var(--accent-primary);
            animation: slideInRight 0.3s ease;
            pointer-events: auto;
            max-width: 300px;
        }

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

        .toast i {
            font-size: 1rem;
            flex-shrink: 0;
        }

        .toast.success i { color: var(--accent-green); }
        .toast.error i { color: var(--accent-red); }
        .toast.warning i { color: var(--accent-orange); }
        .toast.info i { color: var(--accent-primary); }

        .toast-message {
            font-size: 0.75rem;
            color: var(--text-primary);
        }

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

        /* ============================================
           PACKET ANIMATION
        ============================================ */
        .packet {
            position: absolute;
            width: 10px;
            height: 10px;
            border-radius: var(--radius-full);
            z-index: 100;
            pointer-events: none;
            box-shadow: 0 0 10px currentColor;
        }

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

        /* ============================================
           RESPONSIVE DESIGN
        ============================================ */
        
        /* Tablet & Below */
        @media (max-width: 1200px) {
            :root {
                --sidebar-width: 220px;
                --right-panel-width: 300px;
            }

            .tool-btn span {
                display: none;
            }

            .tool-btn {
                padding: 0;
                width: 32px;
            }
        }

        /* Tablet Portrait */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 200px;
                --right-panel-width: 280px;
            }

            .toolbar-group:nth-child(n+4)::after {
                display: none;
            }
        }

        /* Mobile Landscape & Small Tablets */
        @media (max-width: 900px) {
            .sidebar {
                position: fixed;
                left: 0;
                top: 0;
                bottom: 0;
                transform: translateX(-100%);
                width: 260px;
                z-index: var(--z-modal);
            }

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

            .sidebar-toggle {
                display: flex;
            }

            .sidebar-overlay.active {
                display: block;
            }

            .right-panel {
                position: fixed;
                right: 0;
                top: 0;
                bottom: 0;
                transform: translateX(100%);
                width: 320px;
                z-index: var(--z-modal);
            }

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

            .panel-toggle {
                display: flex;
            }

            .main-area {
                width: 100%;
            }

            .toolbar {
                padding-left: 56px;
            }
        }

        /* Mobile Portrait */
        @media (max-width: 600px) {
            :root {
                --toolbar-height: 48px;
                --status-bar-height: 28px;
            }

            html {
                font-size: 13px;
            }

            .sidebar {
                width: 280px;
            }

            .right-panel {
                width: 100%;
            }

            .toolbar-group:nth-child(n+3) {
                display: none;
            }

            .modal-content {
                max-width: 100%;
                max-height: 90vh;
                border-radius: var(--radius-lg);
            }

            .toast-container {
                left: var(--space-3);
                right: var(--space-3);
            }

            .toast {
                max-width: 100%;
            }

            .network-device {
                min-width: 80px;
                padding: var(--space-2);
            }

            .network-device .device-icon-wrapper {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }

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

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

            .quick-commands {
                grid-template-columns: 1fr;
            }
        }

        /* Very Small Screens */
        @media (max-width: 380px) {
            .sidebar-brand {
                gap: var(--space-2);
            }

            .sidebar-logo {
                width: 32px;
                height: 32px;
            }

            .sidebar-title h1 {
                font-size: 1rem;
            }

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

        /* Hover States for Touch Devices */
        @media (hover: none) {
            .device-item:hover {
                transform: none;
                box-shadow: none;
            }

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

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

        /* Print Styles */
        @media print {
            .sidebar,
            .right-panel,
            .toolbar,
            .status-bar,
            .context-menu,
            .modal,
            .toast-container {
                display: none !important;
            }

            .main-area {
                width: 100%;
            }

            .canvas-container {
                background: white;
            }

            .canvas-grid {
                display: none;
            }
        }

        /* High Contrast Mode */
        @media (prefers-contrast: high) {
            :root {
                --border-color: #000;
                --text-primary: #000;
            }

            .network-device {
                border-width: 3px;
            }
        }

        /* Reduced Motion */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }