/* ================================================
   APPSELFIES.COM - SISTEMA DE DISEÑO GLOBAL
   ================================================
   Este archivo define la paleta de colores, estilos
   base y componentes que se usan en TODAS las páginas
   ================================================ */

/* Importación de fuentes modernas */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Montserrat:wght@600;700;800&display=swap');

/* --- PALETA GLOBAL "EL PLAYGROUND" --- */
:root {
    /* Paleta oficial - Playground Edition */
    --color-base: #f8f9fa;        /* Fondo principal (blanco roto) */
    --color-principal: #8B5A2B;   /* Marrón tierra (marcos, bordes físicos) */
    --color-acento: #ed8936;      /* Naranja coral (interactividad, diversión) */
    --color-acento-hover: #dd6b20; /* Coral oscuro para hover */
    
    /* Acento secundario */
    --color-turquesa: #38b2ac;    /* Turquesa (badges, éxito, variedad) */
    --color-turquesa-hover: #2c7a7b;
    
    /* Colores derivados y utilidades */
    --color-texto: #333333;       /* Texto principal */
    --color-texto-claro: #666666; /* Texto secundario */
    --color-blanco: #ffffff;
    --color-borde: rgba(139, 90, 43, 0.15); /* Borde sutil marrón */
    
    /* Colores de estado - Actualizados para Playground */
    --color-exito: #38b2ac;       /* Turquesa en lugar de verde */
    --color-advertencia: #ed8936;  /* Coral */
    --color-error: #fc8181;       /* Rojo suave */
    --color-info: #4299e1;        /* Azul cielo */
    
    /* Sombras 3D pronunciadas - Estilo físico */
    --sombra-fisica: 0 10px 40px rgba(139, 90, 43, 0.15), 0 4px 12px rgba(0, 0, 0, 0.1);
    --sombra-elevada: 0 20px 60px rgba(139, 90, 43, 0.25), 0 8px 20px rgba(0, 0, 0, 0.15);
    --sombra-suave: 0 4px 12px rgba(139, 90, 43, 0.08);
    --sombra-hover: 0 10px 30px rgba(237, 137, 54, 0.3);
    --sombra-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
    --sombra-boton: 0 4px 0 #c05621, 0 6px 20px rgba(237, 137, 54, 0.4);
    
    /* Bordes redondeados consistentes */
    --radio-sm: 8px;
    --radio-md: 12px;
    --radio-lg: 16px;
    --radio-xl: 24px;
    --radio-full: 9999px;
    
    /* Transiciones suaves */
    --transicion-suave: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transicion-rapida: all 0.15s ease;
    --transicion-lenta: all 0.5s ease;
}

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

/* --- ESTILOS BASE PARA TODAS LAS PÁGINAS --- */
body {
    background-color: var(--color-base);
    color: var(--color-texto);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    font-size: 16px;
    animation: fadeIn 0.5s ease-in-out;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animación de entrada */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(10px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

/* Animación de fade-in hacia arriba */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animación de escala */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Animación de deslizamiento desde la izquierda */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animación de deslizamiento desde la derecha */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animación de pulso */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Animación de bounce (entrada con rebote) */
@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3) translateY(-100px);
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* Animación de confetti (partículas de éxito) */
@keyframes confetti {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(1000px) rotate(720deg);
        opacity: 0;
    }
}

/* Animación de shake (error/rechazo) */
@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

/* --- TIPOGRAFÍA UNIFICADA --- */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-principal);
    font-family: 'Montserrat', 'Inter', sans-serif;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 5vw, 2.8rem);
    background: linear-gradient(135deg, var(--color-principal), var(--color-acento));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 1.5rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    color: var(--color-principal);
    font-weight: 700;
}

h3 {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    color: var(--color-principal);
    font-weight: 600;
}

p {
    font-size: clamp(1rem, 2vw, 1.1rem);
    margin-bottom: 1rem;
    color: var(--color-texto);
    line-height: 1.7;
}

/* Texto con énfasis */
.text-destacado {
    font-weight: 600;
    color: var(--color-principal);
}

.text-gradiente {
    background: linear-gradient(135deg, var(--color-principal), var(--color-acento));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* --- BARRA DE NAVEGACIÓN UNIFICADA --- */
.navbar-appselfies {
    background-color: var(--color-blanco);
    border-bottom: 2px solid var(--color-principal);
    box-shadow: var(--sombra-suave);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.nav-logo {
    color: var(--color-principal);
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    transition: var(--transicion-suave);
}

.nav-logo:hover {
    color: var(--color-acento);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.nav-menu a {
    color: var(--color-principal);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transicion-suave);
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
}

.nav-menu a:hover {
    color: var(--color-acento);
    border-bottom-color: var(--color-acento);
}

.nav-menu a.activo {
    color: var(--color-acento);
    border-bottom-color: var(--color-acento);
}

/* --- SISTEMA DE BOTONES PLAYGROUND (TÁCTILES Y FÍSICOS) --- */
/* Clase PRINCIPAL para todos los botones importantes */
.btn-appselfies {
    /* Base y forma - Gradiente coral vibrante */
    background: linear-gradient(135deg, var(--color-acento) 0%, var(--color-acento-hover) 100%);
    color: var(--color-blanco) !important;
    border: none;
    border-radius: var(--radio-md);
    
    /* Tamaño y espaciado */
    padding: 14px 32px;
    min-width: 140px;
    
    /* Tipografía */
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    text-decoration: none;
    text-align: center;
    font-family: 'Inter', sans-serif;
    
    /* Sombra física 3D (efecto botón presionable) */
    box-shadow: var(--sombra-boton);
    transform: translateY(0);
    
    /* Transiciones suaves con bounce */
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Layout */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    
    /* Prevenir selección de texto */
    user-select: none;
    -webkit-user-select: none;
}

/* Efecto de brillo en hover */
.btn-appselfies::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-appselfies:hover::before {
    left: 100%;
}

/* Efecto Hover - Elevación física del botón */
.btn-appselfies:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 0 #c05621, 0 10px 30px rgba(237, 137, 54, 0.5);
}

/* Efecto de "presionar" - Botón se hunde */
.btn-appselfies:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0 #c05621, 0 4px 10px rgba(237, 137, 54, 0.3);
}

/* Variante SECUNDARIA (para acciones menos prioritarias) */
.btn-appselfies.secundario {
    background: transparent;
    color: var(--color-principal) !important;
    border: 3px solid var(--color-principal);
    box-shadow: var(--sombra-suave);
}

.btn-appselfies.secundario:hover {
    background: var(--color-principal);
    color: var(--color-blanco) !important;
    box-shadow: var(--sombra-fisica);
    border-color: var(--color-principal);
    transform: translateY(-2px);
}

.btn-appselfies.secundario:active {
    transform: translateY(0);
}

/* Variante de éxito (turquesa) */
.btn-appselfies.exito {
    background: linear-gradient(135deg, var(--color-exito), var(--color-turquesa-hover));
    box-shadow: 0 4px 0 #2c7a7b, 0 6px 20px rgba(56, 178, 172, 0.4);
}

.btn-appselfies.exito:hover {
    box-shadow: 0 6px 0 #2c7a7b, 0 10px 30px rgba(56, 178, 172, 0.5);
}

.btn-appselfies.exito:active {
    box-shadow: 0 2px 0 #2c7a7b, 0 4px 10px rgba(56, 178, 172, 0.3);
}

/* Variante de advertencia (coral) */
.btn-appselfies.advertencia {
    background: linear-gradient(135deg, var(--color-advertencia), var(--color-acento-hover));
    box-shadow: 0 4px 0 #c05621, 0 6px 20px rgba(237, 137, 54, 0.4);
}

/* Botón deshabilitado */
.btn-appselfies:disabled,
.btn-appselfies.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: var(--sombra-suave);
}

.btn-appselfies:disabled:hover {
    transform: none;
}

/* Botón pequeño */
.btn-appselfies.pequeno {
    padding: 8px 16px;
    font-size: 0.875rem;
    min-width: 100px;
}

/* Botón grande */
.btn-appselfies.grande {
    padding: 18px 40px;
    font-size: 1.125rem;
    min-width: 180px;
}

/* Botón con icono */
.btn-appselfies .icono {
    font-size: 1.2em;
}

/* --- TARJETAS FÍSICAS ESTILO PLAYGROUND --- */
.card-appselfies {
    background-color: var(--color-blanco);
    border: 3px solid var(--color-principal);
    border-radius: var(--radio-lg);
    padding: 1.5rem;
    box-shadow: var(--sombra-fisica);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card-appselfies:hover {
    transform: translateY(-8px) rotate(-1deg);
    box-shadow: var(--sombra-elevada);
}

/* Variante de tarjeta destacada con marco doble */
.card-appselfies.destacada {
    border: 4px solid var(--color-principal);
    box-shadow: 
        inset 0 2px 0 rgba(255,255,255,0.2),
        inset 0 -2px 0 rgba(0,0,0,0.2),
        var(--sombra-fisica);
}

/* Tarjeta con imagen */
.card-imagen {
    background-color: var(--color-blanco);
    border: 3px solid var(--color-principal);
    border-radius: var(--radio-lg);
    overflow: hidden;
    box-shadow: var(--sombra-fisica);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card-imagen img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-imagen .card-contenido {
    padding: 1.5rem;
}

.card-imagen:hover {
    transform: translateY(-8px) rotate(1deg);
    box-shadow: var(--sombra-elevada);
}

/* Tarjeta de herramienta/sección - Módulos de juego */
.tarjeta-herramienta {
    background: linear-gradient(135deg, var(--color-blanco) 0%, #fafbfc 100%);
    border: 4px solid var(--color-principal);
    border-radius: var(--radio-lg);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--sombra-fisica);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    cursor: pointer;
    position: relative;
}

.tarjeta-herramienta:hover {
    transform: translateY(-12px) rotate(-2deg);
    box-shadow: var(--sombra-elevada);
    border-color: var(--color-acento);
}

.tarjeta-herramienta .icono-grande {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}

.tarjeta-herramienta h3 {
    color: var(--color-principal);
    margin-bottom: 0.5rem;
}

.tarjeta-herramienta p {
    color: var(--color-texto-claro);
    font-size: 0.95rem;
}

/* --- CONTENEDOR PRINCIPAL --- */
.container-appselfies {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* --- GRID RESPONSIVE --- */
.grid-appselfies {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* --- SECCIÓN CON ESPACIADO --- */
.section-appselfies {
    padding: 3rem 1rem;
    text-align: center;
}

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

/* --- ICONOS --- */
.icon-appselfies {
    font-size: 1.5rem;
    display: inline-block;
    transition: transform 0.2s ease;
}

.icon-appselfies:hover {
    transform: scale(1.1);
}

/* Iconos con color */
.icon-acento {
    color: var(--color-acento);
}

.icon-principal {
    color: var(--color-principal);
}

/* --- BADGES Y ETIQUETAS PLAYGROUND --- */
.badge-appselfies {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--color-acento), var(--color-acento-hover));
    color: var(--color-blanco);
    box-shadow: 0 2px 8px rgba(237, 137, 54, 0.3);
    transition: var(--transicion-rapida);
}

.badge-appselfies:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(237, 137, 54, 0.4);
}

.badge-appselfies.secundario {
    background: var(--color-turquesa);
    box-shadow: 0 2px 8px rgba(56, 178, 172, 0.3);
}

.badge-appselfies.secundario:hover {
    box-shadow: 0 4px 12px rgba(56, 178, 172, 0.4);
}

.badge-appselfies.outline {
    background-color: transparent;
    border: 2px solid var(--color-acento);
    color: var(--color-acento);
    box-shadow: none;
}

.badge-appselfies.outline:hover {
    background-color: var(--color-acento);
    color: var(--color-blanco);
}

/* --- SEPARADORES --- */
.separador {
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--color-principal), transparent);
    margin: 2rem 0;
}

/* --- ALERTAS Y MENSAJES PLAYGROUND --- */
.alerta {
    padding: 1rem 1.5rem;
    border-radius: var(--radio-md);
    margin: 1rem 0;
    border-left: 5px solid;
    box-shadow: var(--sombra-suave);
    transition: var(--transicion-rapida);
}

.alerta:hover {
    transform: translateX(4px);
}

.alerta.info {
    background-color: #e6f3ff;
    border-color: var(--color-info);
    color: #1d4ed8;
}

.alerta.exito {
    background-color: #e6f9f0;
    border-color: var(--color-exito);
    color: var(--color-turquesa-hover);
}

.alerta.advertencia {
    background-color: #fff7e6;
    border-color: var(--color-advertencia);
    color: #c05621;
}

.alerta.error {
    background-color: #fff0f0;
    border-color: var(--color-error);
    color: #dc2626;
}

/* --- FOOTER --- */
footer {
    background-color: var(--color-blanco);
    border-top: 2px solid var(--color-principal);
    padding: 2rem 1rem;
    text-align: center;
    color: var(--color-texto-claro);
    margin-top: 4rem;
}

footer a {
    color: var(--color-principal);
    text-decoration: none;
    transition: var(--transicion-suave);
}

footer a:hover {
    color: var(--color-acento);
}

/* --- UTILIDADES --- */
.text-center {
    text-align: center;
}

.text-principal {
    color: var(--color-principal);
}

.text-acento {
    color: var(--color-acento);
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* --- MICRO-INTERACCIONES --- */
.hover-lift {
    transition: transform 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
}

.hover-escala {
    transition: transform 0.3s ease;
}

.hover-escala:hover {
    transform: scale(1.05);
}

/* --- LOADING SPINNER --- */
.spinner {
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--color-acento);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

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

/* --- CLASES DE ANIMACIÓN --- */
.animate-fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.4s ease-out;
}

.animate-slide-left {
    animation: slideInLeft 0.5s ease-out;
}

.animate-slide-right {
    animation: slideInRight 0.5s ease-out;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-bounce-in {
    animation: bounceIn 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.animate-shake {
    animation: shake 0.5s ease-in-out;
}

/* Delays para animaciones escalonadas */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

/* --- EFECTOS DE GLASSMORPHISM --- */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* --- GRADIENTES PREDEFINIDOS PLAYGROUND --- */
.gradient-primary {
    background: linear-gradient(135deg, var(--color-principal), var(--color-acento));
}

.gradient-acento {
    background: linear-gradient(135deg, var(--color-acento), var(--color-acento-hover));
}

.gradient-turquesa {
    background: linear-gradient(135deg, var(--color-turquesa), var(--color-turquesa-hover));
}

.gradient-success {
    background: linear-gradient(135deg, var(--color-exito), var(--color-turquesa-hover));
}

/* --- UTILIDADES DE DISPLAY --- */
.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

.flex {
    display: flex !important;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-wrap {
    flex-wrap: wrap;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

/* --- UTILIDADES DE ANCHO --- */
.w-full {
    width: 100%;
}

.w-auto {
    width: auto;
}

.max-w-sm {
    max-width: 384px;
}

.max-w-md {
    max-width: 448px;
}

.max-w-lg {
    max-width: 512px;
}

.max-w-xl {
    max-width: 576px;
}

.max-w-2xl {
    max-width: 672px;
}

/* --- UTILIDADES DE OVERFLOW --- */
.overflow-hidden {
    overflow: hidden;
}

.overflow-auto {
    overflow: auto;
}

.overflow-x-auto {
    overflow-x: auto;
    overflow-y: hidden;
}

/* --- UTILIDADES DE POSICIÓN --- */
.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.fixed {
    position: fixed;
}

.sticky {
    position: sticky;
    top: 0;
}

/* --- Z-INDEX --- */
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* --- CURSOR --- */
.cursor-pointer {
    cursor: pointer;
}

.cursor-not-allowed {
    cursor: not-allowed;
}

/* --- SELECT NONE --- */
.select-none {
    user-select: none;
    -webkit-user-select: none;
}

/* --- EFECTOS ESPECIALES PLAYGROUND --- */
/* Marco de madera 3D */
.marco-madera {
    border: 4px solid var(--color-principal);
    box-shadow: 
        inset 0 2px 0 rgba(255,255,255,0.2),
        inset 0 -2px 0 rgba(0,0,0,0.2),
        var(--sombra-fisica);
    border-radius: var(--radio-md);
}

/* Botón presionable (cursor grab) */
.draggable {
    cursor: grab;
    transition: var(--transicion-rapida);
}

.draggable:active {
    cursor: grabbing;
    transform: scale(0.95);
}

/* Efecto de levitación */
.levitate {
    animation: levitate 3s ease-in-out infinite;
}

@keyframes levitate {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Flash de cámara (para guardar foto) */
.flash {
    animation: flash 0.3s ease-out;
}

@keyframes flash {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 1;
        background: rgba(255, 255, 255, 0.9);
    }
    100% {
        opacity: 0;
    }
}

/* --- SMOOTH SCROLL --- */
html {
    scroll-behavior: smooth;
}

/* --- SKELETON LOADING --- */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* --- PRINT STYLES --- */
@media print {
    .no-print {
        display: none !important;
    }
    
    .navbar-appselfies,
    .btn-appselfies,
    footer {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    a {
        text-decoration: underline;
    }
}

/* --- ACCESIBILIDAD --- */
button:focus,
a:focus,
.btn-appselfies:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 3px solid var(--color-acento);
    outline-offset: 3px;
}

/* Modo de alto contraste */
@media (prefers-contrast: high) {
    :root {
        --color-texto: #000000;
        --color-borde: rgba(0, 0, 0, 0.3);
    }
    
    .btn-appselfies {
        border: 2px solid currentColor;
    }
}

/* Reducir movimiento para usuarios con preferencias de accesibilidad */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Foco visible para teclado */
*:focus-visible {
    outline: 3px solid var(--color-acento);
    outline-offset: 3px;
}

/* Skip to main content link para accesibilidad */
.skip-to-main {
    position: absolute;
    left: -9999px;
    z-index: 999;
    padding: 1rem 1.5rem;
    background-color: var(--color-acento);
    color: var(--color-blanco);
    text-decoration: none;
    border-radius: var(--radio-md);
}

.skip-to-main:focus {
    left: 1rem;
    top: 1rem;
}

/* --- MODO OSCURO (OPCIONAL) --- */
@media (prefers-color-scheme: dark) {
    :root {
        --color-base: #1a1a1a;
        --color-blanco: #2d2d2d;
        --color-texto: #e5e5e5;
        --color-texto-claro: #a0a0a0;
        --color-borde: rgba(139, 90, 43, 0.3);
    }
    
    h1 {
        background: linear-gradient(to right, #a67c52, #3b82f6);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
}

/* --- RESPONSIVE MOBILE --- */
@media (max-width: 768px) {
    .navbar-appselfies {
        padding: 1rem;
        flex-direction: column;
        align-items: flex-start;
    }
    
    .nav-menu {
        width: 100%;
        gap: 1rem;
    }
    
    .btn-appselfies {
        width: 100%;
        padding: 14px 24px;
    }
    
    .container-appselfies {
        padding: 1rem 0.5rem;
    }
    
    .section-appselfies {
        padding: 2rem 1rem;
    }
    
    .grid-appselfies {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.4rem;
    }
    
    h3 {
        font-size: 1.2rem;
    }
    
    .navbar-appselfies {
        padding: 0.75rem;
    }
    
    .nav-menu {
        gap: 0.5rem;
    }
    
    .btn-appselfies {
        padding: 12px 20px;
        font-size: 0.95rem;
    }
    
    .card-appselfies {
        padding: 1rem;
    }
    
    .tarjeta-herramienta {
        padding: 1.5rem;
    }
}

/* Tablets en landscape */
@media (min-width: 769px) and (max-width: 1024px) {
    .grid-appselfies {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop grande */
@media (min-width: 1400px) {
    .container-appselfies {
        max-width: 1320px;
    }
}