@charset "UTF-8";
/**
 * R-Positivo Ciencia - Estilos Principales
 * Micrositio de análisis científico sobre comportamiento canino
 * Versión: 1.0.0
 */

/* ========================================
   VARIABLES CSS
   ======================================== */

:root {
    /* Colores Corporativos R-Positivo */
    --color-primary: #32004f;           /* Morado oscuro */
    --color-secondary: #000000;         /* Negro */
    --color-accent: #33e5a4;            /* Verde agua */
    --color-accent-secondary: #fdc001;  /* Dorado */

    /* Colores Específicos Ciencia (tonos azules académicos) */
    --color-science-primary: #32004f;           /* Morado oscuro */
    --color-science-secondary: #000000;         /* Negro */
    --color-science-accent: #33e5a4;            /* Verde agua */
    --color-science-light: #fdc001;  /* Dorado */


    /* Colores de Texto */
    --color-text-dark: #3A3A3A;
    --color-text-gray: #8b8b8b;
    --color-text-light: #6c757d;
    --color-text-white: #FFFFFF;

    /* Colores de Fondo */
    --color-bg-light: #F5F2ED;
    --color-bg-white: #FFFFFF;
    --color-bg-section: #fafafa;

    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Tipografía */
    --font-primary: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-academic: Georgia, 'Times New Roman', serif;
    --font-mono: 'Courier New', monospace;

    /* Tamaños de Fuente */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Bordes */
    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.75rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    --border-radius-pill: 50px;

    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   RESET Y BASE
   ======================================== */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 140px; /* Altura del banner + header */
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-dark);
    background: var(--color-bg-light);
    min-height: 100vh;
    overflow-x: hidden;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 8px;
    z-index: 10000;
    text-decoration: none;
    font-weight: 600;
}

.skip-link:focus {
    top: 0;
}

.no-content {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    color: var(--color-text-gray);
    font-style: italic;
}

/* ========================================
   BANNER PROMPTER
   ======================================== */

.prompter-banner {
    background: linear-gradient(90deg, var(--color-science-primary) 0%, var(--color-science-secondary) 100%);
    color: var(--color-accent);
    padding: 10px 0;
    overflow: hidden;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1001;
    border-bottom: 2px solid var(--color-science-accent);
    box-shadow: var(--shadow-md);
}

.prompter-container {
    white-space: nowrap;
    display: inline-block;
    animation: scrollText 80s linear infinite;
    padding-left: 100%;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.prompter-text {
    display: inline-block;
    padding-right: 50px;
}

@keyframes scrollText {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-100%);
    }
}

/* ========================================
   HEADER
   ======================================== */

.header {
    background: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 42px;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing-lg);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-section a {
    color: var(--color-accent);
    font-size: 1.5rem;
    text-decoration: none;
    font-weight: bold;
    transition: var(--transition-base);
}

.logo-section img {
    max-width: 80px;
    max-height: 80px;
    transition: var(--transition-base);
}

.logo-section img:hover {
    transform: scale(1.05);
}

/* Navegación */
.nav-menu,
.nav-menu ul,
.nav-menu li,
.dropdown-content,
.dropdown-content li {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-base);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-pill);
    display: block;
}

.nav-menu a:hover,
.nav-menu a:focus {
    background: var(--color-science-accent);
    color: white;
    transform: translateY(-2px);
    outline: none;
}

.nav-menu a.nav-active {
    background: var(--color-science-primary);
    color: white;
}

.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--color-secondary);
    min-width: 220px;
    box-shadow: var(--shadow-xl);
    z-index: 1001;
    border-radius: var(--border-radius-md);
    top: 100%;
    left: 0;
    padding: 0.5rem 0;
}

.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content {
    display: block;
}

.dropdown-content a {
    padding: 0.7rem 1.2rem;
    display: block;
    white-space: nowrap;
    font-size: var(--font-size-sm);
    border-radius: 0;
    color: var(--color-text-white);
}

.dropdown-content a:hover,
.dropdown-content a:focus {
    background-color: rgba(253, 192, 1, 0.2);
    color: var(--color-accent);
}

/* Botón móvil */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 4px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    transition: var(--transition-base);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    margin-top: 92px;
    background: linear-gradient(135deg, var(--color-science-primary) 0%, var(--color-science-secondary) 100%);
    padding: 5rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--color-science-accent) 0%, transparent 70%);
    top: -150px;
    right: -150px;
    opacity: 0.2;
    animation: pulse 4s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
    bottom: -200px;
    left: -200px;
    opacity: 0.15;
    animation: pulse 5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.2;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.3;
    }
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: var(--font-size-4xl);
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 2px;
    font-weight: 700;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: var(--color-text-white);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-white);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   BOTONES
   ======================================== */

.btn-primary,
.btn-secondary,
.btn-link {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius-pill);
    font-size: var(--font-size-base);
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--color-science-accent);
    color: var(--color-science-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    transform: translateY(-3px);
    background: var(--color-accent);
    box-shadow: var(--shadow-lg);
    outline: none;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-white);
    border: 3px solid var(--color-accent);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background: var(--color-accent);
    color: var(--color-primary);
    transform: translateY(-3px);
    outline: none;
}

.btn-link {
    background: var(--color-science-primary);
    color: white;
    padding: 0.5rem 1.5rem;
    font-size: var(--font-size-sm);
}

.btn-link:hover {
    background: var(--color-science-accent);
}

/* ========================================
   SECCIONES GENERALES
   ======================================== */

section {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.section-title {
    text-align: center;
    font-size: var(--font-size-3xl);
    color: var(--color-science-primary);
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
    width: 100%;
    font-weight: 700;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--color-science-accent);
    border-radius: var(--border-radius-sm);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-gray);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* ========================================
   ESTUDIOS
   ======================================== */

.estudios-destacados {
    background: var(--color-bg-white);
}

.estudios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.estudio-card {
    background: var(--color-bg-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 2px solid var(--color-science-light);
    display: flex;
    flex-direction: column;
}

.estudio-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-science-accent);
}

.estudio-imagen {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--color-science-light);
}

.estudio-imagen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.estudio-card:hover .estudio-imagen img {
    transform: scale(1.1);
}

.estudio-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.estudio-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.meta-badge {
    background: var(--color-science-light);
    color: var(--color-science-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-pill);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.meta-date {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.estudio-titulo {
    color: var(--color-science-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
    line-height: 1.4;
    font-weight: 700;
}

.estudio-referencia {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--color-bg-section);
    border-left: 3px solid var(--color-science-accent);
    border-radius: var(--border-radius-sm);
}

.estudio-extracto {
    color: var(--color-text-dark);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    flex: 1;
}

.estudio-temas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.tema-tag {
    background: var(--color-science-light);
    color: var(--color-science-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-pill);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.card-link {
    color: var(--color-science-accent);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition-base);
}

.card-link:hover {
    color: var(--color-science-primary);
    transform: translateX(5px);
}

/* ========================================
   TEMAS
   ======================================== */

.temas-section {
    background: var(--color-bg-section);
}

.temas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.tema-card {
    background: var(--color-bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: var(--transition-base);
    border: 2px solid transparent;
    text-decoration: none;
    color: inherit;
    display: block;
}

.tema-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-science-accent);
    box-shadow: var(--shadow-lg);
}

.tema-icono {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.tema-nombre {
    color: var(--color-science-primary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.tema-descripcion {
    color: var(--color-text-gray);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.tema-count {
    color: var(--color-science-accent);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

/* ========================================
   REVISTAS
   ======================================== */

.revistas-section {
    background: var(--color-bg-white);
}

.revistas-list {
    max-width: 900px;
    margin: 0 auto;
}

.revista-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    background: var(--color-bg-section);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-science-accent);
    transition: var(--transition-base);
}

.revista-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.revista-info {
    flex: 1;
}

.revista-nombre {
    margin-bottom: var(--spacing-sm);
}

.revista-nombre a {
    color: var(--color-science-primary);
    text-decoration: none;
    font-size: var(--font-size-xl);
    font-weight: 700;
    transition: var(--transition-base);
}

.revista-nombre a:hover {
    color: var(--color-science-accent);
}

.revista-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.revista-issn,
.revista-impacto {
    font-family: var(--font-mono);
}

.revista-descripcion {
    color: var(--color-text-gray);
    line-height: 1.6;
}

.revista-count {
    text-align: center;
    min-width: 80px;
}

.count-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-science-accent);
    line-height: 1;
}

.count-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-gray);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ========================================
   SOBRE / PREVIEW
   ======================================== */

.sobre-preview {
    background: linear-gradient(135deg, var(--color-science-primary) 0%, var(--color-science-secondary) 100%);
    color: var(--color-text-white);
}

.sobre-preview .section-title {
    color: var(--color-accent);
}

.sobre-preview .section-title::after {
    background: var(--color-accent);
}

.sobre-text {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg) auto;
    font-size: var(--font-size-lg);
    line-height: 1.8;
    text-align: center;
}

.sobre-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-2xl) 0;
}

.feature-item {
    text-align: center;
    padding: var(--spacing-lg);
}

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

.feature-item h3 {
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xl);
}

.feature-item p {
    color: var(--color-text-white);
    opacity: 0.9;
}

.sobre-cta {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* ========================================
   NEWSLETTER
   ======================================== */

.newsletter-section {
    background: var(--color-bg-section);
}

.newsletter-box {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    background: var(--color-bg-white);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--color-science-light);
}

.newsletter-title {
    color: var(--color-science-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-2xl);
}

.newsletter-description {
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-lg);
    line-height: 1.7;
}

.newsletter-note {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.newsletter-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn-social {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-pill);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-base);
    color: white;
}

.btn-facebook {
    background: #1877f2;
}

.btn-instagram {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
}

.btn-youtube {
    background: #ff0000;
}

.btn-social:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   WHATSAPP FLOAT
   ======================================== */

.whatsapp-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background-color: #25D366;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    z-index: 1000;
    transition: var(--transition-base);
    text-decoration: none;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(37, 211, 102, 0.6);
}

.whatsapp-text {
    position: absolute;
    right: 70px;
    background: var(--color-primary);
    color: white;
    padding: 8px 15px;
    border-radius: var(--border-radius-pill);
    white-space: nowrap;
    opacity: 0;
    transition: var(--transition-base);
    font-size: var(--font-size-sm);
}

.whatsapp-float:hover .whatsapp-text {
    opacity: 1;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background: var(--color-bg-white);
    color: var(--color-primary);
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.footer-section h4 {
    color: var(--color-science-accent);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.footer-section p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.footer-section a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

.footer-section a:hover,
.footer-section a:focus {
    color: var(--color-science-accent);
    outline: none;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.copyright {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    margin-top: var(--spacing-xl);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.copyright p {
    margin: 0;
    max-width: 600px;
    line-height: 1.5;
}

.copyright img {
    margin-bottom: var(--spacing-md);
}

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

@media (max-width: 768px) {
    /* Prompter Banner */
    .prompter-banner {
        padding: 8px 0;
    }

    .prompter-container {
        font-size: var(--font-size-xs);
        animation: scrollText 35s linear infinite;
    }

    /* Header */
    .header {
        top: 38px;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        display: block;
        padding: var(--spacing-md);
        color: var(--color-text-white);
    }

    .dropdown-content {
        position: static;
        background-color: var(--color-secondary);
        display: none;
        box-shadow: none;
    }

    .dropdown.active .dropdown-content {
        display: block;
    }

    /* Hero */
    .hero {
        margin-top: 88px;
        padding: var(--spacing-2xl) var(--spacing-md);
        min-height: 50vh;
    }

    .hero h1 {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-xl);
    }

    .hero-description {
        font-size: var(--font-size-base);
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
    }

    /* Secciones */
    section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .section-subtitle {
        font-size: var(--font-size-base);
    }

    /* Grids */
    .estudios-grid,
    .temas-grid {
        grid-template-columns: 1fr;
    }

    /* Revistas */
    .revista-item {
        flex-direction: column;
        text-align: center;
    }

    .revista-count {
        margin-top: var(--spacing-md);
    }

    /* Features */
    .sobre-features {
        grid-template-columns: 1fr;
    }

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

    .social-links {
        justify-content: center;
    }

    /* WhatsApp */
    .whatsapp-text {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: var(--font-size-xl);
    }

    .estudio-titulo {
        font-size: var(--font-size-lg);
    }

    .tema-nombre {
        font-size: var(--font-size-lg);
    }
}