/* ==========================================
   1. SISTEMA DE DISEÑO (GENDER REVEAL)
   ========================================== */
:root {
    --color-fondo: #FAFAFA; /* Fondo neutro muy claro */
    --color-seccion-clara: #F0F4F8;
    --color-texto-principal: #0A192F; /* Dark Navy minimalista */
    --color-texto-secundario: #4A5568;
    
    /* Dicotomía Rosa Pastel / Azul Cielo */
    --color-rosa-pastel: #F4C2C2;
    --color-azul-cielo: #89CFF0;
    
    /* Acentos combinados y dorados */
    --color-acento-principal: #B39DDB; /* Tono neutro misterioso (morado suave) */
    --color-dorado-vip: #D4AF37;
    
    /* Tipografías */
    --fuente-titulos: 'Playfair Display', serif;
    --fuente-textos: 'Poppins', sans-serif;
    
    /* Sombras y Bordes */
    --sombra-suave: 0 10px 30px rgba(10, 25, 47, 0.05);
    --sombra-fuerte: 0 20px 40px rgba(137, 207, 240, 0.2);
    --borde-radio: 16px;
}

/* ==========================================
   2. RESET Y ESTILOS GLOBALES (ANTI-BUGS)
   ========================================== */
* { 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; 
    /* SUAVIZADO DE FUENTES OBLIGATORIO (Regla estricta) */
    -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 MISTERIOSO --- */
#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; pointer-events: none; }

.loader-logo { 
    font-family: var(--fuente-titulos); font-size: 2.5rem; font-weight: 700; 
    color: var(--color-texto-principal); margin-bottom: 20px; 
    /* REGLA ANTI-BUGS: Cero Scale, usamos opacidad para pulsar */
    animation: pulseNitido 1.5s infinite ease-in-out; 
    /* FIX ANTI-JITTER: Aceleración por GPU para evitar que las letras se traben */
    will-change: transform, opacity;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform: translateZ(0);
}
.loader-logo span.azul { color: var(--color-azul-cielo); font-style: italic; }
.loader-logo span.rosa { color: var(--color-rosa-pastel); font-style: italic; }

.loader-spinner { 
    width: 50px; height: 50px; 
    border: 4px solid var(--color-rosa-pastel); 
    border-top: 4px solid var(--color-azul-cielo); 
    border-bottom: 4px solid var(--color-acento-principal);
    border-radius: 50%; 
    animation: spin 1s linear infinite; 
}

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
@keyframes pulseNitido {
    0%, 100% { opacity: 1; transform: translate3d(0, 0, 0); } 
    50% { opacity: 0.6; transform: translate3d(0, -3px, 0); } 
}

/* Clases de IntersectionObserver */
.animar-oculto { opacity: 0; transform: translateY(40px); 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: translateY(0); }
.delay-1 { transition-delay: 100ms; } 
.delay-2 { transition-delay: 200ms; } 
.delay-3 { transition-delay: 300ms; }

/* ==========================================
   3. BOTONES
   ========================================== */
.btn-principal { 
    display: inline-block; background: linear-gradient(90deg, var(--color-azul-cielo), var(--color-rosa-pastel)); 
    color: #0A192F; padding: 12px 24px; border-radius: 50px; font-size: 0.95rem; font-weight: 600; 
    transition: all 0.3s ease; box-shadow: 0 4px 15px rgba(137, 207, 240, 0.3); text-align: center; cursor: pointer; border: none;
}
.btn-principal:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(244, 194, 194, 0.5); }

.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; 
}
.btn-secundario:hover { background-color: var(--color-texto-principal); color: #FFFFFF; }

.btn-premium { 
    display: inline-block; background-color: transparent; color: var(--color-dorado-vip); 
    padding: 12px 24px; border-radius: 50px; font-size: 0.95rem; font-weight: 600; 
    border: 2px solid var(--color-dorado-vip); transition: all 0.3s ease; text-align: center; 
}
.btn-premium:hover { background-color: var(--color-dorado-vip); color: #FFFFFF; transform: translateY(-2px); box-shadow: 0 6px 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); 
}
.btn-whatsapp:hover { background-color: #128C7E; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4); color: white; }

/* ==========================================
   4. CABECERA
   ========================================== */
header { 
    position: fixed; top: 0; left: 0; width: 100%; background-color: rgba(250, 250, 250, 0.95); 
    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.azul { color: var(--color-azul-cielo); font-style: italic; }
.logo span.rosa { color: var(--color-rosa-pastel); 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-principal); }

/* ==========================================
   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: 600px; margin: 0 auto; margin-bottom: 30px; }

.alerta-personalizacion {
    background-color: white; border: 1px solid rgba(137, 207, 240, 0.3); border-left: 4px solid var(--color-acento-principal);
    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: 2rem; color: var(--color-acento-principal); }
.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);
    overflow: hidden; 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;
}
.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-demo img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s ease; }
/* REGLA ANTI-BUGS: Translate en lugar de scale al hacer hover */
.celular-demo:hover img { transform: translate3d(0, -10px, 0); }

/* 1. BÁSICO */
.celular-basico { animation: flotarBasico 5s ease-in-out infinite; border-color: #CBD5E1; }
.celular-basico::before { background-color: #CBD5E1; }
@keyframes flotarBasico {
    0%, 100% { transform: translate3d(0, 0, 0); } 
    50% { transform: translate3d(0, -10px, 0); } 
}

/* 2. INTERMEDIO (Rosa y Azul) */
.celular-intermedio { 
    border: 10px solid;
    border-image-source: linear-gradient(135deg, var(--color-azul-cielo) 0%, var(--color-rosa-pastel) 100%);
    border-image-slice: 1;
    border-radius: 0; /* Fallback para border-image */
    animation: flotarInter 4.5s ease-in-out 0.5s infinite; 
    box-shadow: 0 15px 35px rgba(137, 207, 240, 0.2); 
}
/* Arreglo para bordes redondeados con gradiente */
.celular-intermedio {
    border: 10px solid transparent;
    background: linear-gradient(var(--color-fondo), var(--color-fondo)) padding-box, 
                linear-gradient(135deg, var(--color-azul-cielo), var(--color-rosa-pastel)) border-box;
    border-radius: 40px;
}
.celular-intermedio::before { background: linear-gradient(90deg, var(--color-azul-cielo), var(--color-rosa-pastel)); }
@keyframes flotarInter { 
    0%, 100% { transform: translate3d(0, 0, 0); } 
    50% { transform: translate3d(0, -15px, 0); } 
}

/* 3. PREMIUM (Dark Mode Neutro VIP) */
.celular-premium { background: #0A192F; border-color: #0A192F; animation: respirarCelularPremium 4s ease-in-out 1s infinite; position: relative; }
.celular-premium::before { background-color: #0A192F; }
.celular-premium::after { 
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; border-radius: 30px; 
    box-shadow: inset 0 0 20px rgba(212, 175, 55, 0.3); pointer-events: none; z-index: 5; 
}
@keyframes respirarCelularPremium {
    /* REGLA ANTI-BUGS: Cero Scale, solo sombras y translate3d fluidos */
    0%, 100% { transform: translate3d(0, 0, 0); box-shadow: 0 15px 35px rgba(10, 25, 47, 0.3), 0 0 20px rgba(212, 175, 55, 0.2); }
    50% { transform: translate3d(0, -20px, 0); box-shadow: 0 25px 45px rgba(10, 25, 47, 0.4), 0 0 40px rgba(212, 175, 55, 0.4); }
}

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

/* ==========================================
   7. 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 0.3s ease; 
    border-top: 3px solid transparent; 
}
.paso-card:hover { transform: translate3d(0, -5px, 0); border-top-color: var(--color-acento-principal); }

.paso-numero { 
    width: 45px; height: 45px; background: var(--color-seccion-clara); color: var(--color-texto-principal); 
    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; }

/* ==========================================
   8. TABLA DE PAQUETES (GENDER REVEAL)
   ========================================== */
.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 0.3s ease; 
    display: flex; flex-direction: column;
}
.precio-card:hover { transform: translate3d(0, -10px, 0); }

.precio-card.popular { 
    border: 2px solid var(--color-acento-principal); box-shadow: var(--sombra-fuerte); z-index: 2; 
    /* Anti-bugs: Quitado el scale() estático, usamos translate sutil para destacarlo */
    transform: translate3d(0, -15px, 0);
}
.precio-card.popular:hover { transform: translate3d(0, -25px, 0); }

.etiqueta-popular { 
    position: absolute; top: -15px; left: 50%; transform: translateX(-50%); 
    background: linear-gradient(90deg, var(--color-azul-cielo), var(--color-rosa-pastel)); color: #0A192F; 
    padding: 5px 15px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; white-space: nowrap; 
}

.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; 
    /* FIX ANTI-JITTER: Forzamos a la GPU a renderizar en su propia capa suave */
    will-change: transform, box-shadow;
    -webkit-backface-visibility: hidden; 
    backface-visibility: hidden;
    transform: translateZ(0);
}
.precio-card.premium.animar-visible { animation: respirarCardPremium 4s ease-in-out 1.5s infinite; }

@keyframes respirarCardPremium {
    /* Anti-bugs: Cero Scale */
    0%, 100% { transform: translate3d(0, 0, 0); box-shadow: 0 15px 35px rgba(10, 25, 47, 0.2); }
    50% { transform: translate3d(0, -8px, 0); box-shadow: 0 25px 45px rgba(10, 25, 47, 0.4); }
}
.precio-card.premium:hover { animation-play-state: paused; transform: translate3d(0, -12px, 0) !important; }

.etiqueta-estrella { 
    position: absolute; top: -15px; left: 50%; transform: translateX(-50%); 
    background: var(--color-dorado-vip); color: #FFF; 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: 20px; }
.precio-header h3 { font-size: 1.5rem; margin-bottom: 10px; }
.precio-card.popular .precio-header h3 { color: var(--color-acento-principal); }
.precio-card.premium .precio-header h3 { color: var(--color-dorado-vip); }

.precio-monto { font-family: var(--fuente-titulos); font-size: 3rem; color: var(--color-texto-principal); font-weight: 700; margin-bottom: 10px; }
.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; }
.precio-header p { min-height: 45px; }

.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-principal); margin-top: 4px; }
.precio-card.popular .lista-funciones li i { color: var(--color-azul-cielo); }
.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; }
.precio-card.premium .lista-funciones li i { color: var(--color-dorado-vip); }

/* ==========================================
   9. FOOTER
   ========================================== */
footer { background-color: var(--color-texto-principal); color: #FFFFFF; padding: 60px 0 20px; text-align: center; }
.footer-logo { font-family: var(--fuente-titulos); font-size: 1.5rem; font-weight: 700; color: #FFFFFF; margin-bottom: 10px; display: inline-block;}
.footer-logo span { color: var(--color-acento-principal); font-style: italic; }
.copyright { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; margin-top: 30px; color: #A0AEC0; font-size: 0.85rem; }

/* ==========================================
   10. RESPONSIVO
   ========================================== */
@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); }
    .precio-card.popular:hover, .precio-card.premium:hover { transform: translate3d(0, -10px, 0); }
}
@media (max-width: 768px) {
    .pasos-grid { grid-template-columns: 1fr; }
    .hero-categoria h1 { font-size: 2.8rem; }
}