/* =========================================
           1. SISTEMA DE DISEÑO (ADULTOS VIP / DORADO)
           ========================================= */
        :root {
            --color-fondo: #FAF6F0; /* Beige cálido de ArteEnLink */
            --color-seccion-clara: #F0EBE1;
            --color-texto-principal: #0A192F;
            --color-texto-secundario: #4A5568;
            
            /* Paleta VIP para Adultos: Dorado Elegante */
            --color-acento: #D4AF37; 
            --color-acento-hover: #B5952F;
            --color-acento-secundario: #E8D3A2;
            --color-fondo-claro-acento: #FDFBF7;
            
            --fuente-titulos: 'Playfair Display', serif;
            --fuente-textos: 'Poppins', sans-serif;
            
            --sombra-suave: 0 10px 30px rgba(10, 25, 47, 0.05);
            --sombra-fuerte: 0 20px 40px rgba(212, 175, 55, 0.25);
            --borde-radio: 16px;
        }

        /* =========================================
           2. RESET Y ESTILOS GLOBALES
           ========================================= */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--fuente-textos);
            background-color: var(--color-fondo);
            color: var(--color-texto-principal);
            line-height: 1.6;
            overflow-x: hidden;
            /* REGLA ESTRICTA: Renderizado de fuentes ultra nítido */
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4 {
            font-family: var(--fuente-titulos);
            color: var(--color-texto-principal);
        }

        p {
            color: var(--color-texto-secundario);
            font-size: 1rem;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        .contenedor {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 5%;
        }

        .seccion-padding {
            padding: 80px 0;
        }

        /* --- PRELOADER Y ANIMACIONES --- */
        #preloader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: var(--color-fondo);
            z-index: 99999;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            transition: opacity 0.6s ease, visibility 0.6s ease;
        }

        #preloader.oculto {
            opacity: 0;
            visibility: hidden;
        }

        .loader-logo {
            font-family: var(--fuente-titulos);
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--color-texto-principal);
            margin-bottom: 20px;
        }

        .loader-logo span {
            color: var(--color-acento);
            font-style: italic;
        }

        .loader-spinner {
            width: 40px;
            height: 40px;
            border: 3px solid var(--color-fondo-claro-acento);
            border-top: 3px solid var(--color-acento);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .animar-oculto {
            opacity: 0;
            transform: translate3d(0, 40px, 0);
            transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
        }

        .animar-visible {
            opacity: 1;
            transform: translate3d(0, 0, 0);
        }

        .delay-1 { transition-delay: 100ms; }
        .delay-2 { transition-delay: 200ms; }
        .delay-3 { transition-delay: 300ms; }
        .delay-4 { transition-delay: 400ms; }

        /* =========================================
           3. BOTONES
           ========================================= */
        .btn-principal {
            display: inline-block;
            background-color: var(--color-acento);
            color: #FFFFFF;
            padding: 12px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
            text-align: center;
            cursor: pointer;
            border: none;
            will-change: transform;
        }

        /* REGLA ESTRICTA: Solo translate3d para levitar */
        .btn-principal:hover {
            background-color: var(--color-acento-hover);
            transform: translate3d(0, -3px, 0);
            box-shadow: 0 8px 20px rgba(212, 175, 55, 0.4);
            color: #FFFFFF;
        }

        .btn-secundario {
            display: inline-block;
            background-color: transparent;
            color: var(--color-texto-principal);
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            border: 2px solid var(--color-texto-principal);
            transition: all 0.3s ease;
            text-align: center;
            will-change: transform;
        }

        .btn-secundario:hover {
            background-color: var(--color-texto-principal);
            color: #FFFFFF;
            transform: translate3d(0, -3px, 0);
        }

        .btn-premium {
            display: inline-block;
            background-color: transparent;
            color: var(--color-acento);
            padding: 12px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            border: 2px solid var(--color-acento);
            transition: all 0.3s ease;
            text-align: center;
            will-change: transform;
        }

        .btn-premium:hover {
            background-color: var(--color-acento);
            color: #FFFFFF;
            transform: translate3d(0, -3px, 0);
            box-shadow: 0 8px 20px rgba(212, 175, 55, 0.4);
        }

        .btn-whatsapp {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: #25D366;
            color: white;
            padding: 12px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
            will-change: transform;
        }

        .btn-whatsapp:hover {
            background-color: #128C7E;
            transform: translate3d(0, -3px, 0);
            box-shadow: 0 8px 20px rgba(37, 211, 102, 0.4);
            color: white;
        }

        /* =========================================
           4. CABECERA
           ========================================= */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(250, 246, 240, 0.95);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0,0,0,0.03);
            padding: 15px 0;
            transition: all 0.3s ease;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 5%;
        }

        .logo {
            font-family: var(--fuente-titulos);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--color-texto-principal);
            letter-spacing: -0.5px;
        }

        .logo span {
            color: var(--color-acento);
            font-style: italic;
        }

        .volver-inicio {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
        }

        .volver-inicio:hover {
            color: var(--color-acento);
        }

        /* =========================================
           5. HERO DE CATEGORÍA
           ========================================= */
        .hero-categoria {
            padding-top: 140px;
            padding-bottom: 40px;
            text-align: center;
            position: relative;
        }

        .hero-categoria h1 {
            font-size: 3.5rem;
            margin-bottom: 15px;
        }

        .hero-categoria p {
            font-size: 1.1rem;
            max-width: 650px;
            margin: 0 auto;
            margin-bottom: 30px;
        }

        .alerta-personalizacion {
            background-color: var(--color-seccion-clara);
            border: 1px solid rgba(212, 175, 55, 0.3);
            border-left: 4px solid var(--color-acento);
            padding: 20px 30px;
            border-radius: 0 12px 12px 0;
            display: inline-flex;
            align-items: center;
            gap: 15px;
            max-width: 800px;
            margin: 0 auto;
            text-align: left;
            box-shadow: var(--sombra-suave);
        }

        .alerta-personalizacion i {
            font-size: 2.2rem;
            color: var(--color-acento);
        }

        .alerta-personalizacion p {
            margin: 0;
            font-size: 0.95rem;
            color: var(--color-texto-principal);
        }

        /* =========================================
           6. ESCAPARATE VIP (LOS 3 CELULARES)
           ========================================= */
        .escaparate-vip {
            padding: 60px 0;
        }

        .grid-celulares {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            justify-items: center;
            align-items: end;
        }

        .columna-modelo {
            display: flex;
            flex-direction: column;
            align-items: center;
            width: 100%;
            max-width: 320px;
        }

        .etiqueta-nivel {
            font-family: var(--fuente-titulos);
            font-size: 1.5rem;
            margin-bottom: 20px;
            color: var(--color-texto-principal);
            font-weight: 600;
        }

        /* Estructura Base del Celular */
        .celular-demo {
            background: var(--color-fondo);
            border-radius: 40px;
            border: 10px solid var(--color-texto-principal);
            box-shadow: var(--sombra-suave);
            position: relative;
            width: 100%;
            aspect-ratio: 9/19;
            margin-bottom: 25px;
            will-change: transform;
            -webkit-backface-visibility: hidden;
            backface-visibility: hidden;
            transform-style: preserve-3d;
        }

        /* El contenedor interno recorta la imagen pero no la sombra exterior */
        .celular-pantalla {
            width: 100%;
            height: 100%;
            border-radius: 30px;
            overflow: hidden;
            position: relative;
            z-index: 2;
        }

        /* Notch (Cámara) */
        .celular-demo::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 120px;
            height: 25px;
            background-color: var(--color-texto-principal);
            border-bottom-left-radius: 15px;
            border-bottom-right-radius: 15px;
            z-index: 10;
        }

        .celular-pantalla img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.8s ease;
        }

        /* REGLA ESTRICTA: Cero text jitter. Hover a la imagen sí permite scale porque es imagen, 
           pero el contenedor usa translate3d. */
        .celular-demo:hover .celular-pantalla img {
            transform: scale(1.05);
        }

        /* ANIMACIONES DE FLOTACIÓN (Cero Scale) */

        /* 1. BÁSICO */
        .celular-basico {
            animation: flotarBasico 5s ease-in-out infinite;
            will-change: transform;
        }
        @keyframes flotarBasico {
            0%, 100% { transform: translate3d(0, 0, 0); }
            50% { transform: translate3d(0, -12px, 0); }
        }

        /* 2. INTERMEDIO */
        .celular-intermedio {
            border-color: var(--color-acento);
            /* REGLA: Sin scale() estático, forzamos jerarquía con margin o flex pero mantenemos nitidez */
            transform: translate3d(0, -10px, 0); 
            animation: flotarInter 4.5s ease-in-out 0.5s infinite;
            box-shadow: 0 15px 35px rgba(212, 175, 55, 0.2);
            will-change: transform;
        }
        .celular-intermedio::before {
            background-color: var(--color-acento);
        }
        @keyframes flotarInter {
            0%, 100% { transform: translate3d(0, -10px, 0); }
            50% { transform: translate3d(0, -25px, 0); }
        }

        /* 3. PREMIUM (Respiración de Sombra con Opacity, Cero Scale) */
        .celular-premium {
            background: #0A192F;
            border-color: #0A192F;
            animation: flotarPremium 5.5s ease-in-out 1s infinite;
            will-change: transform;
        }
        .celular-premium::before {
            background-color: #0A192F;
        }
        
        /* Pseudo-elemento para animar la sombra sin tocar el transform del contenedor */
        .celular-premium::after {
            content: '';
            position: absolute;
            top: -10px; left: -10px; right: -10px; bottom: -10px;
            border-radius: 50px;
            box-shadow: 0 20px 50px rgba(212, 175, 55, 0.5);
            z-index: -1;
            will-change: opacity;
            animation: respirarSombraPremium 3.5s cubic-bezier(0.4, 0, 0.2, 1) infinite alternate;
        }

        @keyframes flotarPremium {
            0%, 100% { transform: translate3d(0, 0, 0); }
            50% { transform: translate3d(0, -15px, 0); }
        }
        @keyframes respirarSombraPremium {
            0% { opacity: 0.1; }
            100% { opacity: 0.9; }
        }

        .acciones-modelo {
            display: flex;
            flex-direction: column;
            gap: 12px;
            width: 100%;
        }

        /* =========================================
           6.5 PASOS DE COMPRA
           ========================================= */
        .pasos-compra {
            margin-top: 60px;
            padding-top: 60px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .pasos-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .pasos-header h2 {
            font-size: 2.2rem;
            margin-bottom: 10px;
        }

        .pasos-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }

        .paso-card {
            background: #FFFFFF;
            padding: 30px 25px;
            border-radius: var(--borde-radio);
            box-shadow: var(--sombra-suave);
            position: relative;
            transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
            border-top: 3px solid transparent;
            will-change: transform;
        }

        .paso-card:hover {
            transform: translate3d(0, -8px, 0);
            border-top-color: var(--color-acento);
        }

        .paso-numero {
            width: 45px;
            height: 45px;
            background: var(--color-fondo-claro-acento);
            color: var(--color-acento);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--fuente-titulos);
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .paso-card h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--color-texto-principal);
        }

        .paso-card p {
            font-size: 0.9rem;
        }

        /* =========================================
           7. PAQUETES Y PRECIOS
           ========================================= */
        .precios {
            background-color: var(--color-seccion-clara);
        }

        .precios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            align-items: stretch;
            gap: 30px;
            margin-top: 40px;
        }

        .precio-card {
            background: var(--color-fondo);
            border-radius: var(--borde-radio);
            padding: 40px 30px;
            width: 100%;
            text-align: center;
            box-shadow: var(--sombra-suave);
            position: relative;
            transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
            will-change: transform;
            display: flex;
            flex-direction: column;
            /* Bloqueo estricto de GPU para eliminar el lag en textos */
            -webkit-backface-visibility: hidden;
            backface-visibility: hidden;
            transform-style: preserve-3d;
            perspective: 1000px;
        }

        /* Efecto de Respiración para Tarjeta Básica (Cero Scale, Cero text jitter) */
        .precio-card.basico::after {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            border-radius: var(--borde-radio);
            box-shadow: 0 15px 35px rgba(10, 25, 47, 0.15);
            pointer-events: none;
            z-index: -1;
            will-change: opacity;
            animation: respirarSombraBasica 3.5s cubic-bezier(0.4, 0, 0.2, 1) infinite alternate;
        }

        @keyframes respirarSombraBasica {
            0% { opacity: 0.1; }
            100% { opacity: 1; }
        }

        .precio-card:hover {
            transform: translate3d(0, -12px, 0);
            z-index: 10;
        }

        /* Tarjeta Popular - REGLA: Sin scale(). Resaltada con bordes y transform Y fijo */
        .precio-card.popular {
            border: 2px solid var(--color-acento);
            box-shadow: var(--sombra-fuerte);
            z-index: 2;
            transform: translate3d(0, -10px, 0); /* Nativamente un poco más arriba */
        }

        .precio-card.popular:hover {
            transform: translate3d(0, -20px, 0);
        }

        .etiqueta-popular {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--color-acento);
            color: #fff;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            white-space: nowrap;
        }

        /* Tarjeta Premium */
        .precio-card.premium {
            background: linear-gradient(135deg, var(--color-texto-principal) 0%, #112240 100%);
            color: #FFFFFF;
            border: 1px solid rgba(212, 175, 55, 0.3);
            z-index: 1;
            will-change: transform;
            animation: flotarTarjetaPremium 3s cubic-bezier(0.4, 0, 0.2, 1) 1.5s infinite alternate;
        }

        @keyframes flotarTarjetaPremium {
            0% { transform: translate3d(0, 0, 0); }
            100% { transform: translate3d(0, -15px, 0); }
        }

        /* Animación de Sombra para Premium Card (Cero Scale) */
        .precio-card.premium::after {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            border-radius: var(--borde-radio);
            box-shadow: 0 15px 45px rgba(212, 175, 55, 0.45);
            pointer-events: none;
            z-index: -1;
            will-change: opacity;
            /* Sincronizado perfectamente con la flotación: 3s up, 3s down */
            animation: respirarSombraCard 3s ease-in-out 1.5s infinite alternate;
        }

        @keyframes respirarSombraCard {
            0% { opacity: 0.1; }
            100% { opacity: 0.8; }
        }

        .precio-card.premium:hover {
            animation-play-state: paused;
            transform: translate3d(0, -15px, 0);
        }

        .etiqueta-estrella {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(90deg, #D4AF37, #E8D3A2, #D4AF37);
            color: var(--color-texto-principal);
            padding: 6px 20px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            box-shadow: 0 4px 10px rgba(212, 175, 55, 0.4);
            white-space: nowrap;
        }

        .precio-header { margin-bottom: 25px; }
        
        .precio-header h3 {
            font-size: 1.5rem;
            margin-bottom: 10px;
        }

        .precio-card.premium .precio-header h3 {
            color: var(--color-acento);
        }

        .precio-monto {
            font-family: var(--fuente-titulos);
            font-size: 3rem;
            color: var(--color-texto-principal);
            font-weight: 700;
            margin-bottom: 20px;
        }

        .precio-card.premium .precio-monto {
            color: #FFFFFF;
        }

        .precio-monto span {
            font-size: 1rem;
            color: var(--color-texto-secundario);
            font-weight: 400;
            font-family: var(--fuente-textos);
        }

        .precio-card.premium .precio-monto span {
            color: #A0AEC0;
        }

        .lista-funciones {
            list-style: none;
            text-align: left;
            margin-bottom: 30px;
            flex-grow: 1;
        }

        .lista-funciones li {
            margin-bottom: 12px;
            font-size: 0.95rem;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .lista-funciones li i {
            color: var(--color-acento);
            margin-top: 4px;
            flex-shrink: 0;
        }

        .lista-funciones li.no-incluido {
            color: #A0AEC0;
            text-decoration: line-through;
        }

        .lista-funciones li.no-incluido i {
            color: #A0AEC0;
        }

        .precio-card.premium .lista-funciones li {
            color: #f1f5f9;
        }

        /* =========================================
           8. FOOTER
           ========================================= */
        footer {
            background-color: var(--color-texto-principal);
            color: #FFFFFF;
            padding: 60px 0 20px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h3 {
            font-family: var(--fuente-titulos);
            color: var(--color-acento);
            font-size: 1.2rem;
            margin-bottom: 20px;
        }

        .copyright {
            text-align: center;
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            color: #A0AEC0;
            font-size: 0.85rem;
        }

        /* =========================================
           9. RESPONSIVO (MOBILE-FIRST ALINEADO)
           ========================================= */
        @media (max-width: 992px) {
            .grid-celulares {
                grid-template-columns: 1fr;
                gap: 60px;
            }
            
            .pasos-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .precios-grid {
                grid-template-columns: 1fr;
                max-width: 450px;
                margin: 40px auto 0;
            }
            
            .precio-card.popular {
                transform: translate3d(0, 0, 0); /* Reseteo en móvil */
            }
            
            .precio-card.popular:hover, .precio-card.premium:hover {
                transform: translate3d(0, -10px, 0);
            }
            
            .celular-intermedio {
                transform: translate3d(0, 0, 0);
            }
            
            @keyframes flotarInter {
                0%, 100% { transform: translate3d(0, 0, 0); }
                50% { transform: translate3d(0, -15px, 0); }
            }
            
            .hero-categoria h1 {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            .pasos-grid {
                grid-template-columns: 1fr;
            }
            .alerta-personalizacion {
                flex-direction: column;
                text-align: center;
                border-left: none;
                border-top: 4px solid var(--color-acento);
                border-radius: 0 0 12px 12px;
            }
        }