/* =====================================================
   ESTILOS PRINCIPALES - CORPTHIA
   Hoja de estilos principal con variables CSS,
   diseño responsive y componentes modernos
   ===================================================== */

/* =====================================================
   1. VARIABLES CSS (CUSTOM PROPERTIES)
   Definición de colores, fuentes y valores reutilizables
   ===================================================== */
:root {
    /* Paleta de colores principal */
    --color-primary: #6366f1;        /* Índigo - color principal */
    --color-primary-dark: #4f46e5;   /* Índigo oscuro para hover */
    --color-primary-light: #818cf8;  /* Índigo claro para detalles */
    --color-secondary: #ec4899;      /* Rosa - color secundario */
    --color-accent: #14b8a6;         /* Turquesa - color de acento */
    
    /* Colores neutros */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Colores semánticos */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* Degradados */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
    --gradient-dark: linear-gradient(180deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
    
    /* Tipografía */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: 3rem;      /* 48px */
    --font-size-6xl: 3.75rem;   /* 60px */
    
    /* Pesos de fuente */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Espaciado */
    --spacing-0: 0;
    --spacing-1: 0.25rem;   /* 4px */
    --spacing-2: 0.5rem;    /* 8px */
    --spacing-3: 0.75rem;   /* 12px */
    --spacing-4: 1rem;      /* 16px */
    --spacing-5: 1.25rem;   /* 20px */
    --spacing-6: 1.5rem;    /* 24px */
    --spacing-8: 2rem;      /* 32px */
    --spacing-10: 2.5rem;   /* 40px */
    --spacing-12: 3rem;     /* 48px */
    --spacing-16: 4rem;     /* 64px */
    --spacing-20: 5rem;     /* 80px */
    --spacing-24: 6rem;     /* 96px */
    
    /* Bordes */
    --border-radius-sm: 0.25rem;   /* 4px */
    --border-radius-md: 0.5rem;    /* 8px */
    --border-radius-lg: 0.75rem;   /* 12px */
    --border-radius-xl: 1rem;      /* 16px */
    --border-radius-2xl: 1.5rem;   /* 24px */
    --border-radius-3xl: 2rem;     /* 32px */
    --border-radius-full: 9999px;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Layout */
    --container-max-width: 1200px;
    --header-height: 80px;
}

/* =====================================================
   2. RESETEO Y ESTILOS BASE
   Normalización de estilos entre navegadores
   ===================================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    overflow-x: hidden;
}

/* Enlaces sin subrayado por defecto */
a {
    text-decoration: none;
    color: inherit;
}

/* Lista sin viñetas */
ul {
    list-style: none;
}

/* Imágenes responsivas */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Botones sin bordes por defecto */
button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* Inputs sin estilos por defecto */
input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

/* =====================================================
   3. CLASES DE UTILIDAD
   Clases reutilizables para uso común
   ===================================================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

.section {
    padding: var(--spacing-20) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-subtitle {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
    line-height: 1.2;
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
    max-width: 600px;
    margin: 0 auto;
}

.section-footer {
    text-align: center;
    margin-top: var(--spacing-12);
}

/* Texto con degradado */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =====================================================
   4. COMPONENTES DE BOTONES
   Estilos para todos los tipos de botones
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--border-radius-xl);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-full {
    width: 100%;
}

.btn-icon {
    font-size: var(--font-size-lg);
    transition: transform var(--transition-base);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* =====================================================
   5. HEADER / BARRA DE NAVEGACIÓN
   Estilos para el encabezado fijo
   ===================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.98);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
}

.logo-icon {
    font-size: var(--font-size-2xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Menú de navegación */
.nav-menu {
    display: flex;
    gap: var(--spacing-8);
}

.nav-link {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Botón de menú móvil */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-2);
}

.burger-bar {
    width: 25px;
    height: 3px;
    background: var(--color-gray-700);
    border-radius: var(--border-radius-full);
    transition: all var(--transition-base);
}

/* =====================================================
   6. SECCIÓN HERO
   Estilos para el banner principal
   ===================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-2) var(--spacing-6);
    background: var(--color-gray-900);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--border-radius-full);
    margin-bottom: var(--spacing-6);
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-8);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-12);
    flex-wrap: wrap;
}

/* Estadísticas */
.hero-stats {
    display: flex;
    gap: var(--spacing-12);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number, 
.stat-number-real {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* Visual de apps flotantes */
.hero-visual {
    position: relative;
    height: 500px;
}

.floating-apps {
    position: relative;
    width: 100%;
    height: 100%;
}

.app-card-floating {
    position: absolute;
    width: 80px;
    height: 80px;
    background: var(--color-white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    animation: float 6s ease-in-out infinite;
}

.app-1 { top: 10%; left: 10%; animation-delay: 0s; }
.app-2 { top: 20%; right: 20%; animation-delay: 1s; }
.app-3 { bottom: 30%; left: 20%; animation-delay: 2s; }
.app-4 { bottom: 20%; right: 10%; animation-delay: 3s; }
.app-5 { top: 50%; left: 50%; animation-delay: 4s; }

/* Forma decorativa de fondo */
.hero-shape {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: var(--gradient-primary);
    opacity: 0.1;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
}

/* =====================================================
   7. SECCIÓN DE PLATAFORMAS
   Tarjetas para cada plataforma
   ===================================================== */
.platforms {
    background: var(--color-gray-50);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
}

.platform-card {
    background: var(--color-white);
    padding: var(--spacing-8);
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.platform-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.platform-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-2xl);
}

.platform-card:hover::before {
    transform: scaleX(1);
}

.platform-icon {
    width: 80px;
    height: 80px;
    background: var(--color-gray-50);
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-6);
    transition: all var(--transition-base);
}

.platform-card:hover .platform-icon {
    background: var(--gradient-primary);
}

.platform-card:hover .platform-icon .icon {
    filter: brightness(0) invert(1);
}

.platform-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
}

.platform-description {
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-6);
    line-height: 1.7;
}

.platform-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    transition: gap var(--transition-base);
}

.platform-link:hover {
    gap: var(--spacing-4);
}

.platform-link .arrow {
    transition: transform var(--transition-base);
}

.platform-link:hover .arrow {
    transform: translateX(4px);
}

/* Badge de plataforma */
.platform-badge {
    position: absolute;
    top: var(--spacing-4);
    right: var(--spacing-4);
    padding: var(--spacing-1) var(--spacing-4);
    background: var(--gradient-primary);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--border-radius-full);
}

.platform-badge.new {
    background: var(--gradient-secondary);
}

/* =====================================================
   8. SECCIÓN DE APLICACIONES DESTACADAS
   Grid de tarjetas de apps
   ===================================================== */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-8);
}

.app-card {
    background: var(--color-white);
    border-radius: var(--border-radius-2xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-100);
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-light);
}

.app-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.app-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    background: var(--color-gray-50);
}

.app-info {
    flex: 1;
}

.app-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-1);
}

.app-category {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.app-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
}

.stars {
    color: var(--color-warning);
    font-size: var(--font-size-sm);
}

.rating-count {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}

.app-description {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-6);
    line-height: 1.6;
}

.app-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--color-gray-100);
}

.app-price {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.app-price.free {
    color: var(--color-success);
}

.btn-download {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-sm);
}

/* =====================================================
   9. SECCIÓN DE NOVEDADES
   Lista de últimas aplicaciones
   ===================================================== */
.newest {
    background: var(--color-gray-50);
}

.newest-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.newest-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
    background: var(--color-white);
    padding: var(--spacing-6);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.newest-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(10px);
}

.newest-icon {
    width: 70px;
    height: 70px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: var(--color-gray-50);
    flex-shrink: 0;
}

.newest-info {
    flex: 1;
}

.newest-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-1);
}

.newest-meta {
    display: flex;
    gap: var(--spacing-4);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.newest-badge {
    padding: var(--spacing-1) var(--spacing-4);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--border-radius-full);
}

.newest-link {
    padding: var(--spacing-3) var(--spacing-6);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.newest-link:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

/* =====================================================
   10. SECCIÓN DE CARACTERÍSTICAS
   Cards con ventajas de la plataforma
   ===================================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-8);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-8);
    background: var(--color-white);
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-6);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
}

.feature-description {
    color: var(--color-gray-500);
    line-height: 1.7;
}

/* =====================================================
   11. SECCIÓN DE CONTACTO
   Formulario e información de contacto
   ===================================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: start;
}

.contact-info .section-subtitle,
.contact-info .section-title {
    text-align: left;
}

.contact-description {
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-8);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--color-gray-50);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-1);
}

.contact-item p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* Redes sociales */
.social-links {
    display: flex;
    gap: var(--spacing-4);
}

.social-link {
    width: 45px;
    height: 45px;
    background: var(--color-gray-50);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--color-gray-600);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: var(--color-white);
    transform: translateY(-3px);
}

/* Formulario de contacto */
.contact-form {
    background: var(--color-white);
    padding: var(--spacing-8);
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: var(--spacing-6);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2);
}

.form-input {
    width: 100%;
    padding: var(--spacing-4);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-base);
    color: var(--color-gray-700);
    transition: all var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder {
    color: var(--color-gray-400);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* =====================================================
   12. FOOTER / PIE DE PÁGINA
   Estilos para el pie de página
   ===================================================== */
.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-12);
    margin-bottom: var(--spacing-12);
}

.footer-column .logo {
    margin-bottom: var(--spacing-6);
}

.footer-column .logo-text {
    color: var(--color-white);
}

.footer-description {
    line-height: 1.8;
    margin-bottom: var(--spacing-6);
}

.footer-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    margin-bottom: var(--spacing-6);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.footer-links a {
    color: var(--color-gray-400);
    transition: all var(--transition-base);
}

.footer-links a:hover {
    color: var(--color-white);
    padding-left: var(--spacing-2);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-gray-800);
}

.copyright {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.developer {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* =====================================================
   13. BOTÓN VOLVER ARRIBA
   Botón flotante para scroll
   ===================================================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border-radius: var(--border-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* =====================================================
   14. MEDIA QUERIES / DISEÑO RESPONSIVE
   Adaptación para diferentes tamaños de pantalla
   ===================================================== */

/* Tablets y pantallas medianas */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-visual {
        order: 1;
        height: 400px;
    }
    
    .hero-description {
        max-width: none;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        text-align: center;
    }
    
    .contact-info .section-subtitle,
    .contact-info .section-title {
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

/* Móviles grandes */
@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: var(--color-white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-12);
        transition: left var(--transition-base);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .burger-bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active .burger-bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .burger-bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-6);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .platforms-grid,
    .apps-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-4);
        text-align: center;
    }
    
    .newest-item {
        flex-direction: column;
        text-align: center;
    }
    
    .newest-meta {
        justify-content: center;
    }
}

/* Móviles pequeños */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
    }
    
    .section {
        padding: var(--spacing-12) 0;
    }
    
    .app-card-header {
        flex-direction: column;
        text-align: center;
    }
    
    .app-footer {
        flex-direction: column;
        gap: var(--spacing-4);
    }
    
    .btn-download {
        width: 100%;
    }
}

/* =====================================================
   SKELETON LOADER — aparece mientras cargan las apps
   ===================================================== */
@keyframes skeletonPulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.5; }
}

.skeleton-card {
    pointer-events: none;
    user-select: none;
}

/* =====================================================
   APP BADGES — destacada / nueva
   ===================================================== */
.app-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
}

.app-badge.featured {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
}

.app-badge.new {
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
}

/* =====================================================
   APP META (versión junto al precio)
   ===================================================== */
.app-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.app-version {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    background: var(--color-gray-100);
    padding: 2px 8px;
    border-radius: var(--border-radius-full);
}

/* =====================================================
   MODAL DE DETALLES DE APLICACIÓN
   ===================================================== */
.app-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.app-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.app-modal-content {
    background: var(--color-white);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    border-radius: var(--border-radius-3xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-2xl);
    transform: translateY(20px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-modal-overlay.active .app-modal-content {
    transform: translateY(0) scale(1);
}

.app-modal-header {
    position: relative;
    padding: var(--spacing-8) var(--spacing-8) var(--spacing-6);
    background: linear-gradient(to bottom, var(--color-gray-50), var(--color-white));
    border-bottom: 1px solid var(--color-gray-100);
    display: flex;
    gap: var(--spacing-6);
    align-items: flex-start;
}

.app-modal-close {
    position: absolute;
    top: var(--spacing-4);
    right: var(--spacing-4);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-gray-100);
    color: var(--color-gray-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.app-modal-close:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-900);
}

.app-modal-icon {
    width: 100px;
    height: 100px;
    border-radius: 20px;
    object-fit: cover;
    background: var(--color-gray-100);
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.app-modal-info {
    flex: 1;
    padding-top: var(--spacing-2);
}

.app-modal-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-1);
    line-height: 1.2;
}

.app-modal-meta {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-3);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-3);
}

.app-modal-body {
    padding: var(--spacing-8);
    overflow-y: auto;
    flex: 1;
}

.app-modal-desc-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-3);
    color: var(--color-gray-900);
}

.app-modal-description {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    line-height: 1.7;
    white-space: pre-wrap;
    margin-bottom: var(--spacing-8);
}

.screenshots-slider {
    display: flex;
    overflow-x: auto;
    gap: var(--spacing-4);
    padding-bottom: var(--spacing-4);
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
    scrollbar-color: var(--color-gray-300) transparent;
}

.screenshots-slider::-webkit-scrollbar {
    height: 6px;
}
.screenshots-slider::-webkit-scrollbar-track {
    background: transparent;
}
.screenshots-slider::-webkit-scrollbar-thumb {
    background-color: var(--color-gray-300);
    border-radius: 20px;
}

.screenshot-slide {
    flex: 0 0 auto;
    width: 250px;
    height: 450px; /* Ratio para móvil vertical */
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    scroll-snap-align: start;
    box-shadow: var(--shadow-sm);
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-200);
}

.screenshot-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.app-modal-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-4);
    background: var(--color-gray-50);
    padding: var(--spacing-4);
    border-radius: var(--border-radius-xl);
    text-align: center;
}

.app-modal-stat-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.app-modal-stat-value {
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
}

.app-modal-footer {
    padding: var(--spacing-6) var(--spacing-8);
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-modal-price {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}