/* ========================================
   Biblioteca sin Censura - Estilos
   ======================================== */

/* Variables de colores (RGB) */
:root {
    --azul-principal: rgb(0, 51, 102);
    --blanco: rgb(255, 255, 255);
    --amarillo-acento: rgb(255, 204, 0);
    --gris-suave: rgb(102, 102, 102);
    
    /* Variantes de colores */
    --azul-oscuro: rgb(0, 36, 71);
    --azul-claro: rgb(0, 77, 153);
    --gris-claro: rgb(240, 240, 240);
    --gris-medio: rgb(180, 180, 180);
    
    /* Espaciado */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    
    /* Bordes */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    
    /* Sombras */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    
    /* Transiciones */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gris-suave);
    background-color: var(--blanco);
}

/* Contenedor */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Header / Navegación
   ======================================== */
.header {
    background-color: var(--azul-principal);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

/* Botón de WhatsApp en el header - siempre visible */
.btn-whatsapp {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: var(--amarillo-acento);
    color: var(--azul-principal);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    transition: var(--transition-fast);
    white-space: nowrap;
    /* Animacion de pulso constante para llamar la atencion */
    animation: pulse-whatsapp 2s ease-in-out infinite;
}

.btn-whatsapp:hover {
    background-color: #e6b800;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    /* Detener animacion al hacer hover */
    animation: none;
}

/* Animacion de pulso para el boton de WhatsApp */
@keyframes pulse-whatsapp {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 204, 0, 0.7);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 204, 0, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 204, 0, 0);
    }
}

.whatsapp-icon {
    font-size: 20px;
}

/* ========================================
   Menú Hamburguesa (Hamburger Menu)
   ======================================== */
.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background-color: var(--blanco);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* Animación del botón hamburguesa cuando está activo */
.hamburger-menu.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger-menu.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

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

.nav-link {
    color: var(--blanco);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--amarillo-acento);
}

/* ========================================
   Sección Hero con Logo
   ======================================== */
.hero {
    background: linear-gradient(135deg, var(--azul-principal) 0%, var(--azul-oscuro) 100%);
    padding: var(--spacing-xl) 0;
    min-height: 500px;
    display: flex;
    align-items: center;
}

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

.hero-text {
    color: var(--blanco);
}

/* Logo en la sección hero */
.hero-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    margin-bottom: var(--spacing-lg);
    transition: var(--transition-fast);
}

.hero-logo:hover {
    transform: scale(1.02);
}

/* Imagen del logo */
.logo-img {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

.hero-logo .logo-icon {
    font-size: 48px;
}

.hero-logo .logo-text {
    font-size: 32px;
    font-weight: 700;
    color: var(--blanco);
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--blanco);
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.btn-cta {
    display: inline-block;
    background-color: var(--amarillo-acento);
    color: var(--azul-principal);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-sm);
    font-size: 18px;
    font-weight: 600;
    transition: var(--transition-fast);
}

.btn-cta:hover {
    background-color: #e6b800;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

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

.hero-illustration {
    position: relative;
    width: 300px;
    height: 250px;
}

.book-shelf {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    height: 180px;
    padding: 0 20px;
}

.book {
    width: 30px;
    background: linear-gradient(to right, var(--amarillo-acento), #cc9900);
    border-radius: 4px;
    transition: var(--transition-normal);
}

.book:hover {
    transform: translateY(-10px);
}

.book-1 { height: 140px; background: linear-gradient(to right, #e74c3c, #c0392b); }
.book-2 { height: 160px; background: linear-gradient(to right, #3498db, #2980b9); }
.book-3 { height: 120px; background: linear-gradient(to right, #2ecc71, #27ae60); }
.book-4 { height: 150px; background: linear-gradient(to right, #9b59b6, #8e44ad); }
.book-5 { height: 130px; background: linear-gradient(to right, #e67e22, #d35400); }

.digital-icon {
    position: absolute;
    bottom: 0;
    right: 20px;
    font-size: 60px;
    animation: float 3s ease-in-out infinite;
}

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

/* ========================================
   Secciones Generales
   ======================================== */
.cursos-section,
.tienda-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--gris-claro);
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--azul-principal);
    text-align: center;
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--gris-suave);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   Grid de Cursos
   ======================================== */
.cursos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: var(--spacing-md);
}

.curso-card {
    display: flex;
    background-color: var(--blanco);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

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

.curso-imagen {
    width: 180px;
    min-height: 200px;
    background: linear-gradient(135deg, var(--azul-claro), var(--azul-principal));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.curso-imagen span {
    font-size: 60px;
}

.curso-info {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.curso-titulo {
    font-size: 20px;
    font-weight: 600;
    color: var(--azul-principal);
    margin-bottom: var(--spacing-xs);
}

.curso-resumen {
    font-size: 14px;
    color: var(--gris-suave);
    margin-bottom: var(--spacing-sm);
    flex: 1;
}

.curso-precio {
    font-size: 24px;
    font-weight: 700;
    color: var(--azul-principal);
    margin-bottom: var(--spacing-sm);
}

.curso-precio span {
    font-size: 14px;
    color: var(--gris-suave);
    font-weight: 400;
}

.btn-acceder {
    display: inline-block;
    background-color: var(--azul-principal);
    color: var(--blanco);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    text-align: center;
    transition: var(--transition-fast);
}

.btn-acceder:hover {
    background-color: var(--azul-claro);
}

/* ========================================
   Grid de Tienda
   ======================================== */
.tienda-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.tienda-card {
    background-color: var(--blanco);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

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

.tienda-imagen {
    height: 180px;
    background: linear-gradient(135deg, var(--amarillo-acento), #cc9900);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tienda-imagen span {
    font-size: 70px;
}

.tienda-info {
    padding: var(--spacing-md);
}

.tienda-titulo {
    font-size: 18px;
    font-weight: 600;
    color: var(--azul-principal);
    margin-bottom: var(--spacing-xs);
}

.tienda-descripcion {
    font-size: 14px;
    color: var(--gris-suave);
    margin-bottom: var(--spacing-sm);
}

.tienda-precio {
    margin-bottom: var(--spacing-sm);
}

.precio-original {
    font-size: 16px;
    color: var(--gris-suave);
    font-weight: 400;
    text-decoration: line-through;
    margin-right: var(--spacing-xs);
}

.precio-oferta {
    font-size: 28px;
    font-weight: 700;
    color: var(--azul-principal);
}

.btn-comprar {
    display: block;
    width: 100%;
    background-color: var(--amarillo-acento);
    color: var(--azul-principal);
    text-decoration: none;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    font-size: 16px;
    text-align: center;
    transition: var(--transition-fast);
}

.btn-comprar:hover {
    background-color: #e6b800;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--azul-principal);
    color: var(--blanco);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--amarillo-acento);
}

.footer-text {
    font-size: 14px;
    margin-bottom: var(--spacing-xs);
    opacity: 0.9;
}

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

.footer-nav a {
    color: var(--blanco);
    text-decoration: none;
    opacity: 0.9;
    transition: var(--transition-fast);
}

.footer-nav a:hover {
    opacity: 1;
    color: var(--amarillo-acento);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.social-link {
    color: var(--amarillo-acento);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.social-link:hover {
    color: var(--blanco);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-message {
    font-size: 16px;
    margin-bottom: var(--spacing-xs);
    color: var(--amarillo-acento);
}

.footer-message a {
    color: var(--blanco);
    text-decoration: underline;
}

.copyright {
    font-size: 14px;
    opacity: 0.7;
}

/* ========================================
   Utilidades
   ======================================== */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
    font-size: 18px;
    color: var(--gris-suave);
}

.error {
    text-align: center;
    padding: var(--spacing-xl);
    font-size: 18px;
    color: #e74c3c;
}

/* ========================================
   Diseño Responsivo
   ======================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .hero-illustration {
        width: 250px;
        height: 200px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

/* Estilos para tablets */
@media (min-width: 600px) and (max-width: 1024px) {
    .hero {
        min-height: 400px;
        padding: var(--spacing-lg) 0;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .cursos-grid,
    .tienda-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Estilos para móviles */
@media (max-width: 768px) {
    /* Header responsive - solo botón WhatsApp y menú */
    .header-content {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    /* Botón WhatsApp siempre visible */
    .btn-whatsapp.btn-header {
        order: 1;
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .btn-whatsapp.btn-header .whatsapp-icon {
        font-size: 18px;
    }
    
    /* Botón hamburguesa visible */
    .hamburger-menu {
        display: flex;
        order: 2;
    }
    
    /* Menú desplegable */
    .nav-menu {
        display: none;
        width: 100%;
        order: 3;
        flex-direction: column;
        gap: 0;
        background-color: var(--azul-oscuro);
        padding: var(--spacing-sm);
        border-radius: var(--border-radius-sm);
        margin-top: var(--spacing-sm);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-link {
        font-size: 14px;
        padding: 12px 16px;
        width: 100%;
        text-align: left;
        border-radius: var(--border-radius-sm);
    }
    
    /* Hero */
    .hero {
        min-height: auto;
        padding: var(--spacing-lg) 0;
    }
    
    .hero-content {
        gap: var(--spacing-md);
    }
    
    .hero-logo {
        flex-direction: column;
        margin-bottom: var(--spacing-md);
    }
    
    .hero-logo .logo-icon {
        font-size: 48px;
    }
    
    .hero-logo .logo-text {
        font-size: 24px;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .hero-illustration {
        width: 180px;
        height: 150px;
    }
    
    .book-shelf {
        height: 100px;
    }
    
    .book {
        width: 20px;
    }
    
    .book-1 { height: 70px; }
    .book-2 { height: 80px; }
    .book-3 { height: 60px; }
    .book-4 { height: 75px; }
    .book-5 { height: 65px; }
    
    .digital-icon {
        font-size: 40px;
    }
    
    .btn-cta {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 14px;
    }
    
    /* Títulos de secciones */
    .section-title {
        font-size: 24px;
    }
    
    .section-subtitle {
        font-size: 14px;
        margin-bottom: var(--spacing-md);
    }
    
    /* Grids */
    .cursos-grid,
    .tienda-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    /* Tarjetas de curso - mantener horizontal */
    .curso-card {
        flex-direction: row;
        min-height: 140px;
    }
    
    .curso-imagen {
        width: 100px;
        min-height: 140px;
    }
    
    .curso-imagen span {
        font-size: 40px;
    }
    
    .curso-info {
        padding: var(--spacing-sm);
    }
    
    .curso-titulo {
        font-size: 14px;
    }
    
    .curso-resumen {
        font-size: 12px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    .curso-precio {
        font-size: 16px;
    }
    
    .curso-precio span {
        font-size: 11px;
    }
    
    /* Tarjetas de tienda */
    .tienda-card {
        margin-bottom: var(--spacing-sm);
    }
    
    /* Footer */
    .footer {
        padding: var(--spacing-lg) 0 var(--spacing-sm);
    }
    
    .footer-content {
        gap: var(--spacing-md);
    }
    
    .footer-title {
        font-size: 16px;
    }
    
    .footer-text {
        font-size: 12px;
    }
    
    .footer-bottom {
        padding-top: var(--spacing-sm);
    }
    
    .footer-message {
        font-size: 12px;
    }
    
    .copyright {
        font-size: 11px;
    }
}

/* Optimizaciones adicionales para pantallas muy pequeñas */
@media (max-width: 400px) {
    .hero-title {
        font-size: 20px;
    }
    
    .hero-logo .logo-text {
        font-size: 20px;
    }
    
    .btn-whatsapp.btn-header {
        font-size: 11px;
        padding: 6px 8px;
    }
    
    .curso-card {
        flex-direction: column;
    }
    
    .curso-imagen {
        width: 100%;
        height: 100px;
    }
    
    .tienda-grid {
        grid-template-columns: 1fr;
    }
}