/* ============================================
           DESIGN SYSTEM — WACSHIELD AUTOPILOT
           ============================================ */
        :root {
            /* Cores Principais - Base escura e tecnológica */
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --primary-50: #eff6ff;
            
            /* Cores Neutras - Escala sofisticada */
            --gray-50: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-300: #cbd5e1;
            --gray-400: #94a3b8;
            --gray-500: #64748b;
            --gray-600: #475569;
            --gray-700: #334155;
            --gray-800: #1e293b;
            --gray-900: #0f172a;
            
            /* Cores Semânticas */
            --success: #22c55e;
            --success-light: #dcfce7;
            --warning: #f59e0b;
            --warning-light: #fef3c7;
            --danger: #ef4444;
            --danger-light: #fee2e2;
            --info: #3b82f6;
            --info-light: #dbeafe;
            --purple: #8b5cf6;
            --purple-light: #ede9fe;
            
            /* Cores de Superfície */
            --bg-primary: #f1f5f9;
            --bg-card: #ffffff;
            --bg-header: #0f172a;
            --bg-sidebar: #0f172a;
            
            /* Texto */
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-inverse: #ffffff;
            
            /* Bordas */
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            
            /* Border Radius */
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            
            /* Sombras */
            --shadow-xs: 0 1px 2px rgba(15,23,42,0.04);
            --shadow-sm: 0 1px 3px rgba(15,23,42,0.06), 0 1px 2px rgba(15,23,42,0.04);
            --shadow-md: 0 4px 20px rgba(15,23,42,0.08);
            --shadow-lg: 0 8px 40px rgba(15,23,42,0.12);
            --shadow-xl: 0 20px 60px rgba(15,23,42,0.15);
            
            /* Espaçamento */
            --space-1: 4px;
            --space-2: 8px;
            --space-3: 12px;
            --space-4: 16px;
            --space-5: 20px;
            --space-6: 24px;
            --space-8: 32px;
            --space-10: 40px;
            
            /* Tipografia */
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            
            /* Transições */
            --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font-family);
            background: var(--bg-primary);
            color: var(--text-primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        /* Scrollbar personalizada */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--gray-100);
            border-radius: var(--radius-full);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--gray-300);
            border-radius: var(--radius-full);
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--gray-400);
        }

        /* Toast */
        .toast {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 1000;
            animation: slideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
            background: var(--gray-900);
            color: white;
            padding: var(--space-4) var(--space-6);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            border: 1px solid rgba(255,255,255,0.06);
            max-width: 400px;
        }

        .toast.success { background: #065f46; }
        .toast.error { background: #991b1b; }
        .toast.info { background: var(--gray-900); }

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

        /* Stat Cards */
        .stat-card {
            transition: var(--transition-slow);
            cursor: default;
            border: 1px solid var(--border-color);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--gray-300);
        }

        /* Tabs */
        .tab-btn {
            transition: var(--transition);
            font-weight: 500;
            padding: var(--space-2) var(--space-4);
            border-radius: var(--radius-md);
            border: none;
            background: transparent;
            cursor: pointer;
            font-family: var(--font-family);
            font-size: 14px;
            color: var(--text-secondary);
        }

        .tab-btn:hover {
            background: var(--gray-100);
            color: var(--text-primary);
        }

        .tab-btn.active {
            color: var(--primary);
            background: var(--primary-50);
            font-weight: 600;
        }

        /* Cards com elevação sutil */
        .card-elevated {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-xs);
            transition: var(--transition-slow);
        }

        .card-elevated:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--gray-200);
        }

        /* Botões refinados */
        .btn-primary {
            background: var(--primary);
            color: white;
            border: none;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font-family);
        }

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

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-secondary {
            background: var(--gray-100);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font-family);
        }

        .btn-secondary:hover {
            background: var(--gray-200);
            color: var(--text-primary);
        }

        .btn-success {
            background: var(--success);
            color: white;
            border: none;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font-family);
        }

        .btn-success:hover {
            background: #16a34a;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* Inputs refinados */
        input, select, textarea {
            font-family: var(--font-family);
            transition: var(--transition);
        }

        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        /* Tabelas refinadas */
        .table-wrapper {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
        }

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

        .table-wrapper thead {
            background: var(--gray-50);
        }

        .table-wrapper th {
            padding: var(--space-3) var(--space-4);
            text-align: left;
            font-weight: 600;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.4px;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-color);
        }

        .table-wrapper td {
            padding: var(--space-3) var(--space-4);
            border-bottom: 1px solid var(--border-light);
            font-size: 14px;
        }

        .table-wrapper tr:last-child td {
            border-bottom: none;
        }

        .table-wrapper tr:hover td {
            background: var(--gray-50);
        }

        /* Modais refinados */
        .modal-overlay {
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(4px);
        }

        .modal-content {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            border: 1px solid var(--border-color);
        }

        /* Badge de status */
        .badge-status {
            padding: 2px 12px;
            border-radius: var(--radius-full);
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.3px;
            display: inline-block;
        }

        .badge-status.success { background: var(--success-light); color: #166534; }
        .badge-status.warning { background: var(--warning-light); color: #92400e; }
        .badge-status.danger { background: var(--danger-light); color: #991b1b; }
        .badge-status.info { background: var(--info-light); color: #1e40af; }

        /* Login Screen */
        .login-gradient {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
        }

        .login-card {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            border: 1px solid var(--border-color);
        }

        /* Header com logo refinado */
        .app-header {
            background: var(--bg-header);
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }

        /* Responsividade aprimorada */
        @media (max-width: 640px) {
            .toast {
                right: 16px;
                left: 16px;
                bottom: 16px;
                max-width: none;
            }

            .stat-card {
                padding: var(--space-3) !important;
            }
            .stat-card p:first-child {
                font-size: 12px;
            }
            .stat-card p:last-child {
                font-size: 20px;
            }

            .modal-content {
                margin: var(--space-3);
                max-height: 90vh;
                overflow-y: auto;
            }
        }

        /* Animações de entrada */
        .fade-in {
            animation: fadeIn 0.4s ease forwards;
        }

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

        /* Link com estilo refinado */
        .link-refined {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

        .link-refined:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* Container de conteúdo */
        .content-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: var(--space-6) var(--space-4);
        }

        /* Separador refinado */
        .divider {
            border: none;
            height: 1px;
            background: var(--border-color);
            margin: var(--space-4) 0;
        }