/* ============================================
           SISTEMA DE DISEÑO - VARIABLES CSS
           ============================================ */
        :root {
            /* Colores Primarios */
            --primary-500: #0057FF;
            --primary-700: #004AD6;
            --primary-100: #E6EFFF;
            
            /* Colores Neutrales */
            --neutral-900: #111827;
            --neutral-600: #4B5563;
            --neutral-200: #E5E7EB;
            --neutral-100: #F8F9FA;
            --neutral-50: #FFFFFF;
            
            /* Colores Semánticos */
            --success: #059669;
            --error: #DC2626;
            
            /* Espaciado (Sistema de 4px) */
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 32px;
            --space-xl: 48px;
            --space-xxl: 64px;
            --space-xxxl: 96px;
            
            /* Tipografía */
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            
            /* Radios de Bordes */
            --radius-sm: 8px;
            --radius-md: 12px;
            
            /* Sombras */
            --shadow-md: 0 4px 12px rgba(0, 87, 255, 0.08);
            --shadow-lg: 0 8px 24px rgba(0, 87, 255, 0.12);
            
            /* Transiciones */
            --transition-fast: 0.2s ease-out;
            --transition-medium: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }
        
        /* ============================================
           RESET Y ESTILOS BASE
           ============================================ */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        
        body {
            font-family: var(--font-family);
            font-size: 18px;
            line-height: 1.7;
            color: var(--neutral-900);
            background-color: var(--neutral-50);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        /* ============================================
           TIPOGRAFÍA
           ============================================ */
        h1 {
            font-size: 64px;
            font-weight: 700;
            line-height: 1.1;
            margin-bottom: var(--space-md);
        }
        
        h2 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: var(--space-lg);
        }
        
        h3 {
            font-size: 24px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: var(--space-sm);
        }
        
        p {
            font-size: 18px;
            line-height: 1.7;
            color: var(--neutral-600);
        }
        
        small {
            font-size: 14px;
            line-height: 1.5;
        }
        
        /* ============================================
           NAVEGACIÓN STICKY
           ============================================ */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: var(--neutral-50);
            z-index: 1000;
            transition: all var(--transition-medium);
            border-bottom: 1px solid transparent;
        }
        
        .navbar.scrolled {
            box-shadow: var(--shadow-md);
            border-bottom-color: var(--neutral-200);
        }
        
        .navbar-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: var(--space-md) var(--space-lg);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 24px;
            font-weight: 700;
            color: var(--neutral-900);
            text-decoration: none;
        }
        
        .logo-accent {
            background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .nav-links {
            display: flex;
            gap: var(--space-lg);
            list-style: none;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--neutral-600);
            font-size: 16px;
            font-weight: 500;
            transition: color var(--transition-fast);
            position: relative;
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-500);
            transition: width var(--transition-fast);
        }
        
        .nav-links a:hover {
            color: var(--primary-500);
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        .nav-cta {
            padding: 12px 24px;
            background: var(--primary-500);
            color: var(--neutral-50);
            border-radius: var(--radius-sm);
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: all var(--transition-fast);
        }
        
        .nav-cta:hover {
            background: var(--primary-700);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        
        /* Menú Hamburguesa (móvil) */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 6px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        
        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--neutral-900);
            transition: all var(--transition-fast);
        }
        
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(8px, 8px);
        }
        
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -7px);
        }
        
        /* ============================================
           SECCIÓN HERO
           ============================================ */
        .hero {
            min-height: 600px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: var(--space-xxxl) var(--space-lg);
            margin-top: 80px;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, var(--primary-100) 0%, var(--neutral-50) 50%);
            opacity: 0.4;
            z-index: -1;
        }
        
        .hero-container {
            max-width: 900px;
            margin: 0 auto;
            animation: fadeInUp 0.8s ease-out;
        }
        
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .hero-subtitle {
            font-size: 20px;
            color: var(--neutral-600);
            margin-bottom: var(--space-xl);
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .hero-cta {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            padding: 18px 36px;
            background: var(--primary-500);
            color: var(--neutral-50);
            text-decoration: none;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 18px;
            transition: all var(--transition-medium);
            box-shadow: var(--shadow-md);
        }
        
        .hero-cta:hover {
            background: var(--primary-700);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        
        .hero-features {
            display: flex;
            justify-content: center;
            gap: var(--space-xl);
            margin-top: var(--space-xl);
            flex-wrap: wrap;
        }
        
        .hero-feature {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            color: var(--neutral-600);
            font-size: 16px;
        }
        
        .hero-feature svg {
            color: var(--success);
        }
        
        /* ============================================
           SECCIONES GENERALES
           ============================================ */
        section {
            padding: var(--space-xxxl) var(--space-lg);
        }
        
        .section-container {
            max-width: 1280px;
            margin: 0 auto;
        }
        
        .section-header {
            text-align: center;
            margin-bottom: var(--space-xxl);
        }
        
        .section-header h2 {
            margin-bottom: var(--space-sm);
        }
        
        .section-header p {
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* Efecto de aparición al hacer scroll */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }
        
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* ============================================
           SECCIÓN DE SERVICIOS
           ============================================ */
        .services {
            background: var(--neutral-50);
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--space-md);
        }
        
        .service-card {
            background: var(--neutral-100);
            padding: var(--space-lg);
            border-radius: var(--radius-md);
            transition: all var(--transition-medium);
            cursor: pointer;
        }
        
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        
        .service-icon {
            width: 48px;
            height: 48px;
            margin-bottom: var(--space-md);
            color: var(--primary-500);
        }
        
        .service-card h3 {
            color: var(--neutral-900);
        }
        
        .service-card p {
            font-size: 16px;
        }
        
        /* ============================================
           SECCIÓN DE TESTIMONIOS
           ============================================ */
        .testimonials {
            background: linear-gradient(135deg, var(--primary-100) 0%, var(--neutral-50) 100%);
        }
        
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--space-lg);
        }
        
        .testimonial-card {
            background: var(--neutral-50);
            padding: var(--space-lg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            transition: all var(--transition-medium);
        }
        
        .testimonial-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        
        .testimonial-content {
            font-style: italic;
            color: var(--neutral-600);
            margin-bottom: var(--space-md);
            font-size: 16px;
            line-height: 1.6;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        
        .author-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neutral-50);
            font-weight: 700;
            font-size: 18px;
        }
        
        .author-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--neutral-900);
            margin-bottom: 2px;
        }
        
        .author-info p {
            font-size: 14px;
            color: var(--neutral-600);
        }
        
        .testimonial-metrics {
            display: flex;
            gap: var(--space-md);
            margin-top: var(--space-md);
            padding-top: var(--space-md);
            border-top: 1px solid var(--neutral-200);
        }
        
        .metric {
            flex: 1;
        }
        
        .metric-value {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-500);
        }
        
        .metric-label {
            font-size: 12px;
            color: var(--neutral-600);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        /* ============================================
           SECCIÓN DE PLANES/PRECIOS
           ============================================ */
        .pricing {
            background: var(--neutral-50);
        }
        
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--space-lg);
            margin-top: var(--space-xxl);
        }
        
        .pricing-card {
            background: var(--neutral-100);
            padding: var(--space-lg);
            border-radius: var(--radius-md);
            border: 2px solid transparent;
            transition: all var(--transition-medium);
            position: relative;
        }
        
        .pricing-card.featured {
            border-color: var(--primary-500);
            transform: scale(1.05);
        }
        
        .pricing-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        
        .pricing-card.featured:hover {
            transform: translateY(-8px) scale(1.05);
        }
        
        .pricing-badge {
            position: absolute;
            top: -12px;
            right: var(--space-lg);
            background: var(--primary-500);
            color: var(--neutral-50);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .pricing-card h3 {
            color: var(--neutral-900);
            margin-bottom: var(--space-sm);
        }
        
        .pricing-description {
            color: var(--neutral-600);
            font-size: 14px;
            margin-bottom: var(--space-md);
        }
        
        .pricing-price {
            display: flex;
            align-items: baseline;
            gap: 8px;
            margin-bottom: var(--space-lg);
        }
        
        .price-currency {
            font-size: 24px;
            font-weight: 700;
            color: var(--neutral-900);
        }
        
        .price-amount {
            font-size: 40px;
            font-weight: 700;
            color: var(--neutral-900);
        }
        
        .price-period {
            font-size: 16px;
            color: var(--neutral-600);
        }
        
        .pricing-features {
            list-style: none;
            margin-bottom: var(--space-lg);
        }
        
        .pricing-features li {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            padding: var(--space-xs) 0;
            font-size: 16px;
            color: var(--neutral-600);
        }
        
        .pricing-features svg {
            color: var(--success);
            flex-shrink: 0;
        }
        
        .pricing-cta {
            display: block;
            width: 100%;
            padding: 14px;
            text-align: center;
            border-radius: var(--radius-sm);
            text-decoration: none;
            font-weight: 600;
            transition: all var(--transition-fast);
        }
        
        .pricing-cta.primary {
            background: var(--primary-500);
            color: var(--neutral-50);
        }
        
        .pricing-cta.primary:hover {
            background: var(--primary-700);
            transform: translateY(-2px);
        }
        
        .pricing-cta.secondary {
            background: transparent;
            color: var(--primary-500);
            border: 2px solid var(--primary-500);
        }
        
        .pricing-cta.secondary:hover {
            background: var(--primary-100);
        }
        
        /* ============================================
           SECCIÓN DE CONTACTO
           ============================================ */
        .contact {
            background: linear-gradient(135deg, var(--neutral-50) 0%, var(--primary-100) 100%);
        }
        
        .contact-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .contact-form {
            background: var(--neutral-50);
            padding: var(--space-xl);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
        }
        
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-md);
            margin-bottom: var(--space-md);
        }
        
        .form-group {
            margin-bottom: var(--space-md);
        }
        
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--neutral-900);
            margin-bottom: var(--space-xs);
        }
        
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: var(--space-sm);
            background: var(--neutral-100);
            border: 1px solid var(--neutral-200);
            border-radius: var(--radius-sm);
            font-family: var(--font-family);
            font-size: 16px;
            color: var(--neutral-900);
            transition: all var(--transition-fast);
        }
        
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border: 2px solid var(--primary-500);
            box-shadow: 0 0 0 3px rgba(0, 87, 255, 0.1);
        }
        
        .form-group textarea {
            resize: vertical;
            min-height: 120px;
        }
        
        .form-group.error input,
        .form-group.error select,
        .form-group.error textarea {
            border-color: var(--error);
        }
        
        .error-message {
            color: var(--error);
            font-size: 14px;
            margin-top: var(--space-xs);
            display: none;
        }
        
        .form-group.error .error-message {
            display: block;
        }
        
        .submit-btn {
            width: 100%;
            padding: var(--space-sm);
            background: var(--primary-500);
            color: var(--neutral-50);
            border: none;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-fast);
            position: relative;
        }
        
        .submit-btn:hover:not(:disabled) {
            background: var(--primary-700);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        
        .submit-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }
        
        .submit-btn.loading::after {
            content: '';
            position: absolute;
            right: var(--space-md);
            top: 50%;
            transform: translateY(-50%);
            width: 20px;
            height: 20px;
            border: 2px solid var(--neutral-50);
            border-top-color: transparent;
            border-radius: 50%;
            animation: spin 0.6s linear infinite;
        }
        
        .success-message {
            background: var(--success);
            color: var(--neutral-50);
            padding: var(--space-md);
            border-radius: var(--radius-sm);
            margin-bottom: var(--space-md);
            display: none;
            align-items: center;
            gap: var(--space-sm);
        }
        
        .success-message.show {
            display: flex;
        }
        
        /* ============================================
           FOOTER
           ============================================ */
        .footer {
            background: var(--neutral-900);
            color: var(--neutral-200);
            padding: var(--space-xxl) var(--space-lg) var(--space-lg);
        }
        
        .footer-container {
            max-width: 1280px;
            margin: 0 auto;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--space-xl);
            margin-bottom: var(--space-xxl);
        }
        
        .footer-section h4 {
            color: var(--neutral-50);
            font-size: 18px;
            margin-bottom: var(--space-md);
        }
        
        .footer-section p,
        .footer-section a {
            color: var(--neutral-200);
            font-size: 14px;
            line-height: 1.6;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: var(--space-sm);
        }
        
        .footer-links a {
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        
        .footer-links a:hover {
            color: var(--primary-500);
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: var(--space-lg);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .footer-bottom p {
            font-size: 14px;
            color: var(--neutral-200);
        }
        
        /* ============================================
           ANIMACIONES
           ============================================ */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes spin {
            to {
                transform: translateY(-50%) rotate(360deg);
            }
        }
        
        /* ============================================
           RESPONSIVE DESIGN (Mobile-First)
           ============================================ */
        @media (max-width: 768px) {
            /* Tipografía escalada para móviles */
            h1 {
                font-size: 40px;
            }
            
            h2 {
                font-size: 32px;
            }
            
            h3 {
                font-size: 20px;
            }
            
            p {
                font-size: 16px;
            }
            
            /* Navegación móvil */
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: var(--neutral-50);
                flex-direction: column;
                padding: var(--space-xxxl) var(--space-lg);
                box-shadow: var(--shadow-lg);
                transition: right var(--transition-medium);
            }
            
            .nav-links.active {
                right: 0;
            }
            
            .nav-links a {
                font-size: 18px;
            }
            
            .hamburger {
                display: flex;
            }
            
            /* Hero móvil */
            .hero {
                min-height: 500px;
                padding: var(--space-xxl) var(--space-md);
            }
            
            .hero-subtitle {
                font-size: 18px;
            }
            
            .hero-features {
                flex-direction: column;
                align-items: center;
                gap: var(--space-md);
            }
            
            /* Secciones */
            section {
                padding: var(--space-xxl) var(--space-md);
            }
            
            /* Grids apilados */
            .services-grid,
            .testimonials-grid,
            .pricing-grid {
                grid-template-columns: 1fr;
            }
            
            /* Formulario de contacto */
            .form-row {
                grid-template-columns: 1fr;
            }
            
            .contact-form {
                padding: var(--space-md);
            }
            
            /* Pricing cards sin scale en móvil */
            .pricing-card.featured {
                transform: scale(1);
            }
            
            .pricing-card.featured:hover {
                transform: translateY(-8px) scale(1);
            }
            
            /* Footer */
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        
        @media (min-width: 769px) and (max-width: 1024px) {
            /* Tablet: 2 columnas */
            .services-grid,
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }