/* ===================================
   ESTILOS PRINCIPALES
   Biblioteca Abierta de Trabajo Social
   =================================== */

/* Variables CSS para fácil mantenimiento */
:root {
    /* Colores principales */
    --color-primario: #2C3E50;
    --color-secundario: #3498DB;
    --color-acento: #E67E22;
    --color-fondo: #F9FAFB;
    --color-fondo-blanco: #FFFFFF;
    --color-texto: #333333;
    --color-texto-claro: #666666;
    --color-borde: #E5E7EB;

    /* Colores hover */
    --color-primario-hover: #1a252f;
    --color-secundario-hover: #2980b9;
    --color-acento-hover: #d35400;

    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Ancho máximo del contenedor */
    --container-max: 1200px;

    /* Bordes y sombras */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --sombra-suave: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --sombra-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

    /* Transiciones */
    --transicion-base: 0.3s ease;

    /* Tipografía */
    --font-encabezados: 'Lora', 'Merriweather', Georgia, serif;
    --font-cuerpo: 'Inter', 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

body {
    font-family: var(--font-cuerpo);
    color: var(--color-texto);
    background-color: var(--color-fondo);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   TIPOGRAFÍA
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-encabezados);
    color: var(--color-primario);
    line-height: 1.3;
    font-weight: 600;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-secundario);
    text-decoration: none;
    transition: color var(--transicion-base);
}

a:hover {
    color: var(--color-secundario-hover);
}

/* ===================================
   ESTRUCTURA GENERAL
   =================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

main {
    min-height: calc(100vh - 200px);
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

section {
    margin-bottom: var(--spacing-xxl);
}

/* ===================================
   CABECERA Y NAVEGACIÓN
   =================================== */

.header {
    background-color: var(--color-fondo-blanco);
    box-shadow: var(--sombra-suave);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: var(--container-max);
    margin: 0 auto;
}

.logo {
    font-family: var(--font-encabezados);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primario);
    text-decoration: none;
}

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

.logo span {
    color: var(--color-secundario);
}

/* Navegación principal */
.nav-main {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-texto);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: color var(--transicion-base);
}

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

.nav-link:hover {
    color: var(--color-secundario);
}

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

.nav-link.active {
    color: var(--color-secundario);
}

/* Botón menú móvil */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-primario);
    transition: var(--transicion-base);
}

/* ===================================
   HERO PRINCIPAL
   =================================== */

.hero {
    background: linear-gradient(135deg, var(--color-primario) 0%, #34495e 100%);
    color: var(--color-fondo-blanco);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--color-fondo-blanco);
    font-size: 2.75rem;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

/* Botones principales */
.btn-group {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transicion-base);
    text-decoration: none;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-acento);
    color: var(--color-fondo-blanco);
    border-color: var(--color-acento);
}

.btn-primary:hover {
    background-color: var(--color-acento-hover);
    border-color: var(--color-acento-hover);
    color: var(--color-fondo-blanco);
    transform: translateY(-2px);
    box-shadow: var(--sombra-hover);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-fondo-blanco);
    border-color: var(--color-fondo-blanco);
}

.btn-secondary:hover {
    background-color: var(--color-fondo-blanco);
    color: var(--color-primario);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-secundario);
    border-color: var(--color-secundario);
}

.btn-outline:hover {
    background-color: var(--color-secundario);
    color: var(--color-fondo-blanco);
    transform: translateY(-2px);
}

.btn-dark {
    background-color: var(--color-primario);
    color: var(--color-fondo-blanco);
    border-color: var(--color-primario);
}

.btn-dark:hover {
    background-color: var(--color-primario-hover);
    border-color: var(--color-primario-hover);
    transform: translateY(-2px);
}

/* ===================================
   TARJETAS Y BLOQUES
   =================================== */

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

.card {
    background-color: var(--color-fondo-blanco);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--sombra-suave);
    transition: all var(--transicion-base);
    border: 1px solid var(--color-borde);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--sombra-hover);
}

.card-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(52, 152, 219, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-secundario);
    font-size: 1.5rem;
}

.card h3 {
    margin-bottom: var(--spacing-sm);
}

.card p {
    color: var(--color-texto-claro);
    margin-bottom: var(--spacing-md);
}

.card .btn {
    margin-top: var(--spacing-sm);
}

/* Tarjetas de navegación grandes */
.card-nav {
    text-align: center;
    padding: var(--spacing-xl);
}

.card-nav .card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    font-size: 2rem;
}

/* ===================================
   SECCIONES DE CONTENIDO
   =================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-secundario);
    border-radius: 2px;
}

.section-header p {
    color: var(--color-texto-claro);
    font-size: 1.1rem;
    margin-top: var(--spacing-md);
}

/* ===================================
   PRESENTACIÓN BREVE
   =================================== */

.about-preview {
    background-color: var(--color-fondo-blanco);
    padding: var(--spacing-xxl) 0;
}

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

.about-text h2 {
    margin-bottom: var(--spacing-md);
}

.about-text p {
    color: var(--color-texto-claro);
    line-height: 1.8;
}

.about-author {
    background-color: var(--color-fondo);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}

.about-author-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background-color: var(--color-borde);
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--color-texto-claro);
}

.about-author h4 {
    margin-bottom: var(--spacing-xs);
}

.about-author p {
    color: var(--color-texto-claro);
    font-size: 0.9rem;
}

/* ===================================
   PÁGINAS INTERNAS
   =================================== */

.page-header {
    background-color: var(--color-primario);
    color: var(--color-fondo-blanco);
    padding: var(--spacing-xl) 0;
}

.page-header h1 {
    color: var(--color-fondo-blanco);
    margin-bottom: var(--spacing-xs);
}

.page-header p {
    opacity: 0.9;
    font-size: 1.1rem;
    max-width: 700px;
}

/* Breadcrumbs */
.breadcrumbs {
    padding: var(--spacing-sm) 0;
    font-size: 0.9rem;
    color: var(--color-texto-claro);
}

.breadcrumbs a {
    color: var(--color-secundario);
}

.breadcrumbs span {
    margin: 0 var(--spacing-xs);
}

/* Contenido de página interna */
.page-content {
    background-color: var(--color-fondo-blanco);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--sombra-suave);
}

.page-content h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.page-content h2:first-child {
    margin-top: 0;
}

.page-content ul, .page-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.page-content li {
    margin-bottom: var(--spacing-xs);
}

/* Índice de temas */
.topic-index {
    background-color: var(--color-fondo);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xl);
}

.topic-index h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.topic-index ul {
    list-style: none;
    padding: 0;
}

.topic-index li {
    margin-bottom: var(--spacing-xs);
}

.topic-index a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: all var(--transicion-base);
}

.topic-index a:hover {
    background-color: var(--color-secundario);
    color: var(--color-fondo-blanco);
}

/* Zona de recursos */
.resources-section {
    border-top: 2px solid var(--color-borde);
    padding-top: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.resources-section h3 {
    margin-bottom: var(--spacing-md);
}

.resource-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--color-fondo);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transicion-base);
}

.resource-item:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

.resource-icon {
    color: var(--color-acento);
    font-size: 1.25rem;
}

.resource-info h4 {
    font-size: 1rem;
    margin-bottom: 0;
    font-family: var(--font-cuerpo);
    font-weight: 600;
}

.resource-info p {
    font-size: 0.85rem;
    color: var(--color-texto-claro);
    margin: 0;
}

/* ===================================
   PÁGINA SOBRE EL AUTOR
   =================================== */

.author-profile {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.author-photo-large {
    width: 100%;
    aspect-ratio: 1;
    background-color: var(--color-borde);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    color: var(--color-texto-claro);
}

.author-info h1 {
    margin-bottom: var(--spacing-xs);
}

.author-role {
    color: var(--color-secundario);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.author-bio {
    line-height: 1.8;
    color: var(--color-texto-claro);
    margin-bottom: var(--spacing-lg);
}

.author-experience {
    margin-top: var(--spacing-lg);
}

.author-experience h3 {
    margin-bottom: var(--spacing-md);
}

.experience-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-borde);
}

.experience-item:last-child {
    border-bottom: none;
}

.experience-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(52, 152, 219, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secundario);
    flex-shrink: 0;
}

/* ===================================
   PÁGINA DE CONTACTO
   =================================== */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-form {
    background-color: var(--color-fondo-blanco);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--sombra-suave);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-texto);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-borde);
    border-radius: var(--border-radius);
    font-family: var(--font-cuerpo);
    font-size: 1rem;
    transition: border-color var(--transicion-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-secundario);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-info {
    padding: var(--spacing-lg);
}

.contact-info h3 {
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    color: var(--color-texto-claro);
    margin-bottom: var(--spacing-md);
}

.contact-methods {
    margin-top: var(--spacing-lg);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.contact-method-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(52, 152, 219, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secundario);
}

/* ===================================
   PIE DE PÁGINA
   =================================== */

.footer {
    background-color: var(--color-primario);
    color: var(--color-fondo-blanco);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: auto;
}

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

.footer-brand h3 {
    color: var(--color-fondo-blanco);
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    opacity: 0.8;
    font-size: 0.95rem;
}

.footer-links h4 {
    color: var(--color-fondo-blanco);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-cuerpo);
    font-weight: 600;
}

.footer-links ul {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transicion-base);
}

.footer-links a:hover {
    color: var(--color-fondo-blanco);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
    margin-left: var(--spacing-md);
}

/* ===================================
   DISEÑO RESPONSIVE
   =================================== */

@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    :root {
        font-size: 15px;
    }

    .header-inner {
        padding: var(--spacing-sm);
    }

    .menu-toggle {
        display: flex;
    }

    .nav-main {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--color-fondo-blanco);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--sombra-suave);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transicion-base);
    }

    .nav-main.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        padding: var(--spacing-sm) 0;
        width: 100%;
        text-align: center;
    }

    .hero {
        padding: var(--spacing-xl) 0;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn-group {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .author-profile {
        grid-template-columns: 1fr;
    }

    .author-photo-large {
        max-width: 250px;
        margin: 0 auto;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand {
        grid-column: span 1;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .footer-bottom a {
        margin: 0 var(--spacing-sm);
    }

    .page-content {
        padding: var(--spacing-md);
    }

    /* Mejoras responsive adicionales para móviles */
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .section-header p {
        font-size: 0.95rem;
    }

    /* Tarjetas en grid - una columna en móvil */
    .card-grid,
    .course-modules-grid,
    .mapas-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .card {
        padding: 1.25rem;
    }

    .card h3 {
        font-size: 1.2rem;
    }

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

    /* Imágenes responsive */
    img {
        max-width: 100%;
        height: auto;
    }

    /* Botones más anchos en móvil */
    .btn {
        width: 100%;
        max-width: 100%;
        padding: 0.75rem 1rem;
        text-align: center;
        justify-content: center;
        display: inline-block;
    }

    .btn-group {
        flex-direction: column;
        gap: 0.75rem;
    }

    /* Títulos reducidos */
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.4rem;
    }

    h3 {
        font-size: 1.2rem;
    }

    /* Reducir spacing en secciones */
    section {
        padding: 2rem 0;
    }

    .course-hero {
        padding: 2rem 0;
    }

    .course-hero h1 {
        font-size: 1.5rem;
    }

    .course-hero-subtitle {
        font-size: 0.95rem;
    }

    .course-badges {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .course-badge {
        font-size: 0.75rem;
        padding: 0.4rem 0.75rem;
    }

    /* Tarjetas de módulos de curso */
    .course-module-card {
        padding: 1.25rem;
    }

    .course-module-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .course-module-number {
        font-size: 1rem;
        width: 36px;
        height: 36px;
    }

    .course-module-title {
        font-size: 1.1rem;
    }

    .course-module-description {
        font-size: 0.9rem;
    }

    .course-module-actions {
        flex-direction: column;
        gap: 0.5rem;
    }

    .course-module-actions .btn {
        width: 100%;
        text-align: center;
    }

    /* Timeline del curso */
    .course-timeline {
        flex-wrap: wrap;
        gap: 0.5rem;
        justify-content: center;
    }

    .course-timeline-item {
        flex: 0 0 calc(33.333% - 0.5rem);
    }

    /* Tablas con scroll horizontal */
    .table-responsive,
    table {
        overflow-x: auto;
        display: block;
    }

    /* Elementos anchos con scroll */
    .overflow-auto {
        overflow-x: auto;
    }

    /* Footer */
    .footer {
        padding: 2rem 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        margin-bottom: 1.5rem;
    }

    /* Breadcrumbs */
    .breadcrumbs {
        font-size: 0.85rem;
        padding: 0.75rem 0;
    }

    /* Página de autorización */
    .authorization-grid {
        grid-template-columns: 1fr;
    }

    /* Mapas */
    .mapa-card {
        margin-bottom: 1rem;
    }

    /* Extra materials */
    .course-extra-card {
        padding: 1.25rem;
    }

    /*about-text y licencias */
    .about-text {
        padding: 1rem;
    }

    /* Ajustes específicos para fondos europeos */
    .infografia-container img,
    [class*="infografia"] img {
        max-width: 100%;
        height: auto;
    }

    /* Bloques de contenido del curso */
    .course-content-block {
        padding: 1.25rem;
    }

    .course-content-block h3 {
        font-size: 1.15rem;
    }

    .course-content-block h4 {
        font-size: 1rem;
    }

    .course-content-block p {
        font-size: 0.9rem;
        line-height: 1.6;
    }

    .course-content-block ul li {
        font-size: 0.9rem;
    }

    .ideas-clave {
        padding: 1rem;
    }

    /* Audio player */
    audio {
        width: 100%;
        display: block;
    }

    /* legal content */
    .legal-content-inner {
        padding: 1rem;
    }

    .legal-content-inner h4 {
        font-size: 1rem;
    }

    .legal-content-inner p {
        font-size: 0.85rem;
    }

    /* Page headers */
    .page-header {
        padding: 2rem 0;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .page-header p {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

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

    .card-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}

/* ===================================
   UTILIDADES
   =================================== */

.text-center {
    text-align: center;
}

.text-claro {
    color: var(--color-texto-claro);
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mb-md { margin-bottom: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* Visibilidad */
.hidden {
    display: none !important;
}

/* ===================================
   ACORDEÓN LEGAL DEL FOOTER
   =================================== */

.footer-legal-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.legal-accordion {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.legal-item {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.legal-header {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-md);
    color: rgba(255, 255, 255, 0.9);
    font-family: var(--font-cuerpo);
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color var(--transicion-base);
}

.legal-header:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.legal-header .icon {
    font-size: 0.8rem;
    transition: transform var(--transicion-base);
}

.legal-item.active .legal-header .icon {
    transform: rotate(180deg);
}

.legal-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--color-texto);
}

.legal-content-inner {
    padding: var(--spacing-md);
    font-size: 0.9rem;
    line-height: 1.7;
}

.legal-content-inner h4 {
    color: var(--color-primario);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.legal-content-inner h4:first-child {
    margin-top: 0;
}

.legal-content-inner p {
    margin-bottom: var(--spacing-sm);
}

.legal-content-inner ul {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.legal-content-inner li {
    margin-bottom: var(--spacing-xs);
}

@media (max-width: 768px) {
    .legal-header {
        padding: var(--spacing-sm);
        font-size: 0.9rem;
    }

    .legal-content-inner {
        padding: var(--spacing-sm);
        font-size: 0.85rem;
    }
}

/* ===================================
   ESTILOS PARA IMÁGENES
   =================================== */

/* Imagen de hero con fondo */
.hero-with-image {
    position: relative;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.95) 0%, rgba(52, 73, 94, 0.9) 100%),
                url('../imgs/diverse-professional-community-meeting.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero-with-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.85) 0%, rgba(52, 73, 94, 0.8) 100%);
}

/* Imagen de página de cabecera */
.page-header-with-image {
    position: relative;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.95) 0%, rgba(52, 73, 94, 0.9) 100%);
    background-size: cover;
    background-position: center;
}

.page-header-with-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.85) 0%, rgba(52, 73, 94, 0.8) 100%);
}

.page-header-with-image .container {
    position: relative;
    z-index: 1;
}

/* Imagen de contenido general */
.content-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-lg) 0;
    box-shadow: var(--sombra-suave);
}

/* Imagen flotante en contenido */
.content-image-float {
    max-width: 45%;
    height: auto;
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-md);
    box-shadow: var(--sombra-suave);
    float: right;
}

.content-image-float.left {
    float: left;
}

.content-image-float.right {
    float: right;
}

@media (max-width: 768px) {
    .content-image-float {
        max-width: 100%;
        float: none !important;
        margin: var(--spacing-md) 0;
    }
}

/* Imagen del autor -圆形 */
.author-photo-img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--sombra-suave);
}

/* Imagen de autor pequeña -圆形 */
.author-photo-small {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: var(--sombra-suave);
    margin: 0 auto var(--spacing-md);
    display: block;
}

/* Imagen de tarjeta/card */
.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    margin-bottom: var(--spacing-md);
}

/* Imagen decorativa de sección */
.section-image {
    width: 100%;
    max-height: 300px;
    object-fit: cover;
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-lg);
}

/* Grid de imágenes */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.image-grid-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--sombra-suave);
}

.image-grid-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transicion-base);
}

.image-grid-item:hover img {
    transform: scale(1.05);
}

/* Caption de imagen */
.image-caption {
    padding: var(--spacing-sm);
    background-color: var(--color-fondo);
    font-size: 0.85rem;
    color: var(--color-texto-claro);
    text-align: center;
    font-style: italic;
}

@media (max-width: 768px) {
    .hide-mobile {
        display: none !important;
    }
}

@media (min-width: 769px) {
    .hide-desktop {
        display: none !important;
    }
}

/* ===================================
   ESTILOS PARA CURSO HOUSING FIRST
   =================================== */

/* Curso - Hero Section */
.course-hero {
    background: linear-gradient(135deg, var(--color-primario) 0%, #34495e 100%);
    color: var(--color-fondo-blanco);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.course-hero h1 {
    color: var(--color-fondo-blanco);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.course-hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.6;
}

.course-badges {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.course-badge {
    background-color: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.course-badge.accent {
    background-color: var(--color-acento);
}

/* Course Progress Timeline */
.course-progress-section {
    background-color: var(--color-fondo);
    padding: var(--spacing-xl) 0;
}

.course-progress-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.course-progress-header h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.course-timeline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.course-timeline::before {
    content: '';
    position: absolute;
    top: 25px;
    left: 50px;
    right: 50px;
    height: 3px;
    background-color: var(--color-borde);
    z-index: 0;
}

.course-timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
    flex: 1;
}

.course-timeline-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--color-fondo-blanco);
    border: 3px solid var(--color-borde);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-texto-claro);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transicion-base);
}

.course-timeline-item.active .course-timeline-number {
    background-color: var(--color-secundario);
    border-color: var(--color-secundario);
    color: var(--color-fondo-blanco);
}

.course-timeline-item.completed .course-timeline-number {
    background-color: var(--color-acento);
    border-color: var(--color-acento);
    color: var(--color-fondo-blanco);
}

.course-timeline-label {
    font-size: 0.85rem;
    color: var(--color-texto-claro);
    text-align: center;
    max-width: 100px;
}

.course-timeline-item.active .course-timeline-label {
    color: var(--color-secundario);
    font-weight: 600;
}

.course-timeline-item.completed .course-timeline-label {
    color: var(--color-acento);
    font-weight: 600;
}

@media (max-width: 768px) {
    .course-timeline {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .course-timeline::before {
        top: 0;
        bottom: 0;
        left: 24px;
        right: auto;
        width: 3px;
        height: auto;
        top: 25px;
        bottom: 25px;
    }

    .course-timeline-item {
        flex-direction: row;
        width: 100%;
    }

    .course-timeline-number {
        margin-bottom: 0;
        margin-right: var(--spacing-md);
    }

    .course-timeline-label {
        text-align: left;
        max-width: none;
    }
}

/* Course Modules Grid */
.course-modules-section {
    padding: var(--spacing-xxl) 0;
}

.course-modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.course-module-card {
    background-color: var(--color-fondo-blanco);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--sombra-suave);
    border: 1px solid var(--color-borde);
    transition: all var(--transicion-base);
    display: flex;
    flex-direction: column;
}

.course-module-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--sombra-hover);
}

.course-module-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.course-module-number {
    width: 45px;
    height: 45px;
    min-width: 45px;
    border-radius: 50%;
    background-color: var(--color-secundario);
    color: var(--color-fondo-blanco);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.course-module-title {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primario);
}

.course-module-description {
    color: var(--color-texto-claro);
    font-size: 0.95rem;
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: var(--spacing-md);
}

.course-module-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--color-texto-claro);
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-borde);
}

.course-module-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.course-module-actions .btn {
    flex: 1;
    min-width: 120px;
    justify-content: center;
}

/* Course Module Detail Page */
.course-module-header-section {
    background-color: var(--color-primario);
    color: var(--color-fondo-blanco);
    padding: var(--spacing-xl) 0;
}

.course-module-header-section h1 {
    color: var(--color-fondo-blanco);
    margin-bottom: var(--spacing-sm);
}

.course-module-breadcrumb {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.course-module-breadcrumb a {
    color: rgba(255, 255, 255, 0.9);
}

.course-module-content {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
}

.course-module-nav {
    background-color: var(--color-fondo);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.course-module-nav h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-texto-claro);
    margin-bottom: var(--spacing-md);
}

.course-module-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.course-module-nav-list li {
    margin-bottom: var(--spacing-xs);
}

.course-module-nav-list a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    color: var(--color-texto);
    transition: all var(--transicion-base);
}

.course-module-nav-list a:hover,
.course-module-nav-list a.active {
    background-color: var(--color-secundario);
    color: var(--color-fondo-blanco);
}

.course-module-nav-number {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
}

.course-module-nav-list a.active .course-module-nav-number,
.course-module-nav-list a:hover .course-module-nav-number {
    background-color: rgba(255, 255, 255, 0.3);
}

.course-module-body {
    background-color: var(--color-fondo-blanco);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--sombra-suave);
}

.course-module-body h2 {
    font-size: 1.5rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-primario);
}

.course-module-body h2:first-child {
    margin-top: 0;
}

.course-module-body h3 {
    font-size: 1.2rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-primario);
}

.course-module-body p {
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--color-texto);
}

.course-module-body ul,
.course-module-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.course-module-body li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.course-module-body strong {
    color: var(--color-primario);
}

.course-module-download-section {
    background-color: var(--color-fondo);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    text-align: center;
}

.course-module-download-section h4 {
    margin-bottom: var(--spacing-md);
}

.course-module-download-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.course-module-pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-borde);
}

@media (max-width: 768px) {
    .course-modules-grid {
        grid-template-columns: 1fr;
    }

    .course-module-content {
        grid-template-columns: 1fr;
    }

    .course-module-nav {
        position: static;
        margin-bottom: var(--spacing-lg);
    }

    .course-module-pagination {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .course-module-pagination .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Course Extra Materials */
.course-extra-materials {
    background-color: var(--color-fondo);
    padding: var(--spacing-xxl) 0;
}

.course-extra-card {
    background-color: var(--color-fondo-blanco);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--sombra-suave);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.course-extra-card h3 {
    margin-bottom: var(--spacing-md);
}

.course-extra-card p {
    color: var(--color-texto-claro);
    margin-bottom: var(--spacing-lg);
}

/* Highlight for IA menu item */
.nav-link-highlight {
    background-color: #FCD34D !important;
    color: #000000 !important;
    border-radius: 6px;
    padding: 0.5rem 1rem !important;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-link-highlight:hover {
    background-color: #FBBF24 !important;
    transform: translateY(-1px);
}