/* ===========================
   GenBiome Blog Styles
   Color Palette inspired by genomic/biotech aesthetic
   =========================== */

:root {
    /* Primary Colors - Based on typical genomic/biotech branding */
    --primary-blue: #0066cc;
    --primary-dark: #003d7a;
    --primary-light: #3385d6;
    
    /* Accent Colors */
    --accent-green: #00a86b;
    --accent-teal: #00bcd4;
    --accent-purple: #7c4dff;
    
    /* Neutral Colors */
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-lighter: #f0f4f8;
    --bg-card: #ffffff;
    
    /* Text Colors */
    --text-primary: #1a1a1a;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --text-white: #ffffff;
    
    /* Status Colors */
    --danger-red: #e53e3e;
    --warning-orange: #ed8936;
    --info-blue: #4299e1;
    --success-green: #48bb78;
    
    /* Border & Shadow */
    --border-light: #e2e8f0;
    --border-medium: #cbd5e0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --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, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --transition: all 0.3s ease;
}

/* ===========================
   Reset & Base Styles
   =========================== */

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

img {
    max-width: 100%;
    height: auto;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    max-width: 100vw;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    overflow-x: hidden;
}

/* ===========================
   Header & Navigation
   =========================== */

.header {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo-img {
    height: 50px;
    width: auto;
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-blue);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-blue);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-left: var(--spacing-lg);
    padding-left: var(--spacing-lg);
    border-left: 1px solid var(--border-light);
}

.lang-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: var(--transition);
}

.lang-link:hover {
    color: var(--primary-blue);
    background: var(--bg-lighter);
}

.lang-link.active {
    color: var(--primary-blue);
    background: var(--bg-lighter);
}

.lang-separator {
    color: var(--border-medium);
    font-size: 0.9rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: var(--transition);
}

/* ===========================
   Hero Section
   =========================== */

.hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 100%);
    color: var(--text-white);
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><circle cx="100" cy="100" r="80" fill="rgba(255,255,255,0.03)"/><circle cx="800" cy="400" r="120" fill="rgba(255,255,255,0.03)"/><circle cx="1100" cy="200" r="90" fill="rgba(255,255,255,0.03)"/></svg>');
    background-size: cover;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 100%;
}

.breadcrumb {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.breadcrumb a {
    color: var(--text-white);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 1.5rem;                /* ⬆️ Más espacio para logo grande */
}

/* Logo grande con círculo blanco que se difumina en el azul */
.hero-title-logo {
    width: 5rem;                    /* ⬆️ MUCHO MÁS GRANDE (era 3rem) */
    height: 5rem;
    border-radius: 50%;
    background: radial-gradient(circle at center, 
        rgba(255, 255, 255, 1) 0%,       /* Blanco sólido centro */
        rgba(255, 255, 255, 0.95) 20%,   /* Blanco opaco */
        rgba(255, 255, 255, 0.8) 35%,    /* Transición suave */
        rgba(255, 255, 255, 0.5) 50%,    /* Medio transparente */
        rgba(255, 255, 255, 0.25) 65%,   /* Casi transparente */
        rgba(255, 255, 255, 0.1) 80%,    /* Muy transparente */
        transparent 100%                  /* Totalmente transparente */
    );
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem;                /* Más padding para logo grande */
    flex-shrink: 0;
    position: relative;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));  /* Sombra suave */
}

.hero-title-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    font-size: 0.95rem;
}

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

.meta-item i {
    opacity: 0.8;
}

/* ===========================
   Main Content Layout
   =========================== */

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

.content-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

/* ===========================
   Table of Contents Sidebar
   =========================== */

.toc-sidebar {
    position: sticky;
    top: 100px;
}

.toc-wrapper {
    background: var(--bg-white);
    border-radius: 12px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.toc-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.toc-nav ul {
    list-style: none;
}

.toc-nav li {
    margin-bottom: var(--spacing-xs);
}

.toc-link {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    padding: var(--spacing-xs);
    border-radius: 6px;
    transition: var(--transition);
    line-height: 1.4;
}

.toc-link:hover,
.toc-link.active {
    color: var(--primary-blue);
    background: var(--bg-lighter);
}

.toc-link.active {
    font-weight: 600;
}

/* ===========================
   Article Styles
   =========================== */

.article {
    background: var(--bg-white);
    border-radius: 12px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

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

.article-section:last-of-type {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    line-height: 1.3;
}

.section-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-teal));
    color: var(--text-white);
    border-radius: 12px;
    font-size: 1.5rem;
    font-weight: 800;
    flex-shrink: 0;
}

.section-content {
    font-size: 1.05rem;
    line-height: 1.8;
}

.section-content p {
    margin-bottom: var(--spacing-md);
}

.lead {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-secondary);
    line-height: 1.7;
}

.section-content strong {
    color: var(--primary-dark);
    font-weight: 600;
}

.section-content em {
    color: var(--primary-blue);
}

/* ===========================
   Content Components
   =========================== */

/* Article Images */
.article-hero-image {
    margin-bottom: var(--spacing-xl);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-img,
.content-img {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
    object-fit: cover;
}

.article-image {
    margin: var(--spacing-lg) 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.image-caption {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
    margin-top: var(--spacing-sm);
    padding: 0 var(--spacing-md);
}

/* Chart Containers */
.chart-container {
    background: var(--bg-white);
    border: 2px solid var(--border-light);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    box-shadow: var(--shadow-sm);
}

.chart-title {
    color: var(--primary-blue);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.chart-title i {
    font-size: 1.2rem;
}

.chart-container canvas {
    height: 400px !important;
    max-height: 400px;
    margin: var(--spacing-md) 0;
}

.chart-caption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-light);
    font-style: italic;
    margin-top: var(--spacing-md);
    line-height: 1.5;
}

/* Highlight Boxes */
.highlight-box {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin: var(--spacing-lg) 0;
    border-left: 4px solid;
}

.highlight-box i {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.highlight-box h4 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

.highlight-box p {
    margin-bottom: 0;
}

.highlight-box.warning {
    background: #fff5f5;
    border-color: var(--danger-red);
    color: #742a2a;
}

.highlight-box.warning i {
    color: var(--danger-red);
}

.highlight-box.info {
    background: #ebf8ff;
    border-color: var(--info-blue);
    color: #2c5282;
}

.highlight-box.info i {
    color: var(--info-blue);
}

.highlight-box.critical {
    background: #fffaf0;
    border-color: var(--warning-orange);
    color: #7c2d12;
}

.highlight-box.critical i {
    color: var(--warning-orange);
}

.highlight-box.reflection {
    background: #f0fff4;
    border-color: var(--success-green);
    color: #22543d;
}

.highlight-box.reflection i {
    color: var(--success-green);
}

/* Quote Box */
.quote-box {
    background: var(--bg-lighter);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin: var(--spacing-lg) 0;
    position: relative;
}

.quote-box i {
    color: var(--primary-blue);
    font-size: 2rem;
    opacity: 0.3;
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
}

.quote-box blockquote {
    margin: 0;
    padding-left: var(--spacing-xl);
}

.quote-box p {
    font-size: 1.15rem;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.quote-box cite {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: normal;
}

.quote-box.accent {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.05), rgba(0, 188, 212, 0.05));
    border-left: 4px solid var(--primary-blue);
}

/* Info Cards */
.info-card {
    display: flex;
    gap: var(--spacing-md);
    background: var(--bg-white);
    border: 2px solid var(--border-light);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    transition: var(--transition);
}

.info-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.info-card-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-teal));
    color: var(--text-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.info-card-content h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--primary-dark);
}

.info-card-content p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.info-card.methodology {
    background: linear-gradient(135deg, rgba(124, 77, 255, 0.05), rgba(0, 168, 107, 0.05));
    border-color: var(--accent-purple);
}

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

.effect-card {
    background: var(--bg-white);
    border: 2px solid var(--border-light);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: var(--transition);
}

.effect-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--primary-blue);
}

.effect-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
    color: var(--text-white);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
}

.effect-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.effect-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Stat Cards */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.stat-card {
    background: var(--bg-white);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: center;
    border: 2px solid var(--border-light);
    transition: var(--transition);
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0;
}

.stat-card.stat-danger {
    border-color: var(--danger-red);
}

.stat-card.stat-danger .stat-number {
    color: var(--danger-red);
}

.stat-card.stat-warning {
    border-color: var(--warning-orange);
}

.stat-card.stat-warning .stat-number {
    color: var(--warning-orange);
}

/* Comparison Box */
.comparison-box {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.comparison-item {
    background: var(--bg-white);
    border: 2px solid var(--border-light);
    border-radius: 12px;
    overflow: hidden;
}

.comparison-header {
    padding: var(--spacing-md);
    color: var(--text-white);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.comparison-header.traditional {
    background: linear-gradient(135deg, #718096, #4a5568);
}

.comparison-header.modern {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-teal));
}

.comparison-header h4 {
    margin: 0;
    font-size: 1.1rem;
}

.comparison-item ul {
    list-style: none;
    padding: var(--spacing-md);
}

.comparison-item li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    font-size: 0.95rem;
}

.comparison-item li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

/* Exposure Routes */
.exposure-routes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.route-card {
    background: var(--bg-lighter);
    border-radius: 12px;
    padding: var(--spacing-lg);
    border-left: 4px solid var(--accent-green);
}

.route-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-green);
    color: var(--text-white);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
}

.route-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.route-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Action Box */
.action-box {
    background: linear-gradient(135deg, rgba(0, 168, 107, 0.1), rgba(72, 187, 120, 0.1));
    border: 2px solid var(--accent-green);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.action-box h4 {
    color: var(--accent-green);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.action-box p {
    margin-bottom: 0;
}

/* Final Question */
.final-question {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    color: var(--text-white);
    padding: var(--spacing-xl);
    border-radius: 12px;
    margin: var(--spacing-lg) 0;
    text-align: center;
}

.final-question i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.final-question h3 {
    font-size: 1.5rem;
    line-height: 1.5;
    font-weight: 600;
    margin: 0;
}

/* References */
.references {
    background: var(--bg-lighter);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.references h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    font-size: 1.5rem;
}

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

.reference-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-white);
    border-radius: 8px;
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition);
}

.reference-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.ref-number {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-teal));
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.ref-content {
    flex: 1;
}

.ref-authors {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.ref-title {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.ref-journal {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.ref-link {
    font-size: 0.85rem;
}

.ref-link a {
    color: var(--primary-blue);
    text-decoration: none;
    word-break: break-all;
    transition: var(--transition);
}

.ref-link a:hover {
    text-decoration: underline;
    color: var(--primary-dark);
}

/* ===========================
   CTA Section
   =========================== */

.cta-section {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-teal));
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
    text-align: center;
    color: var(--text-white);
}

.cta-content h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-white);
    color: var(--primary-blue);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Visual CTA Section */
.visual-cta-section {
    margin: var(--spacing-xl) 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.visual-cta-section:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.visual-cta-link {
    display: block;
    text-decoration: none;
}

.cta-image {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.visual-cta-link:hover .cta-image {
    transform: scale(1.02);
}

/* ===========================
   Share Section
   =========================== */

.share-section {
    padding: var(--spacing-lg) 0;
    border-top: 2px solid var(--border-light);
    margin-top: var(--spacing-xl);
    text-align: center;
}

.share-section h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 1rem;
}

.share-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.share-btn {
    width: 45px;
    height: 45px;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-white);
}

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

.share-btn.twitter {
    background: #1da1f2;
}

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

.share-btn.linkedin {
    background: #0077b5;
}

.share-btn.email {
    background: #718096;
}

/* ===========================
   Footer
   =========================== */

.footer {
    background: #000000;
    color: #ffffff;
    padding: var(--spacing-xxl) 0 var(--spacing-md);
    margin-top: var(--spacing-xxl);
    border-top: 3px solid var(--primary-blue);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 var(--spacing-md);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

.footer-logo {
    height: 60px;
    width: auto;
    margin-bottom: var(--spacing-md);
    filter: brightness(0) invert(1);
    display: block;
}

.footer-col p {
    font-size: 0.95rem;
    opacity: 0.85;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    color: #ffffff;
    letter-spacing: 0.5px;
}

.footer-col ul {
    list-style: none;
}

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

.footer-col a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
    display: inline-block;
}

.footer-col a:hover {
    color: var(--accent-teal);
    transform: translateX(5px);
}

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

.social-links a {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-links a:hover {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 102, 204, 0.4);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    text-align: center;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom p {
    margin: 0;
}

/* ===========================
   TABLE OF CONTENTS (TOC)
   =========================== */

.toc-section {
    background: white;
    padding: var(--spacing-lg) 0;
    margin: var(--spacing-xl) 0;
}

.toc-container {
    background: white;
    border-radius: 16px;
    padding: var(--spacing-xl) var(--spacing-lg);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-light);
    max-width: 700px;
}

.toc-title {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.toc-title i {
    color: var(--primary-blue);
    font-size: 1rem;
    margin-right: var(--spacing-xs);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-list li {
    margin-bottom: 0.6rem;
}

.toc-list li:first-child a {
    background: var(--bg-lighter);
    color: var(--primary-blue);
    font-weight: 600;
}

.toc-list a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
    font-size: 0.95rem;
    line-height: 1.5;
}

.toc-list a:hover {
    background: var(--bg-lighter);
    color: var(--primary-blue);
    padding-left: 1.3rem;
}

/* App Cards Grid */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.app-card {
    background: var(--bg-lighter);
    border-radius: 12px;
    padding: var(--spacing-lg);
    border: 2px solid var(--border-light);
    transition: var(--transition);
}

.app-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.1);
    transform: translateY(-4px);
}

.app-card h4 {
    color: var(--primary-blue);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.app-card p {
    color: var(--text-medium);
    line-height: 1.6;
    margin: 0;
}

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 992px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .toc-sidebar {
        position: static;
        order: -1;
    }
    
    .toc-wrapper {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    /* Logo adjustments for mobile */
    .logo-img {
        height: 40px;
        max-width: 150px;
        object-fit: contain;
    }
    
    .nav {
        padding: 0.75rem 0;
    }
    
    /* Hide circular logo on mobile */
    .hero-logo-circle {
        display: none;
    }
    
    /* Remove left padding on mobile */
    .hero-content {
        padding-left: 0;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    /* Hide TOC on mobile */
    .toc-section,
    .toc-sidebar {
        display: none !important;
    }
    
    .language-switcher {
        position: absolute;
        top: 15px;
        right: 60px;
        margin: 0;
        padding: 0;
        border: none;
    }
    
    .hero-title {
        font-size: 2rem;
        line-height: 1.3;
        text-align: left;
        flex-direction: row;
        gap: 1rem;              /* ⬆️ Gap ajustado para tablet */
    }
    
    .hero-title-logo {
        width: 3.5rem;          /* ⬆️ Más grande en tablet (era 2rem) */
        height: 3.5rem;
        padding: 0.6rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        line-height: 1.5;
        text-align: left;
    }
    
    .section-title {
        font-size: 1.5rem;
        flex-direction: column;
        align-items: flex-start;
        line-height: 1.4;
    }
    
    .section-text,
    .section-content p {
        text-align: left;
        line-height: 1.7;
    }
    
    .article,
    .article-content {
        padding: var(--spacing-md);
    }
    
    .effects-grid,
    .stat-cards,
    .comparison-box,
    .exposure-routes {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Better text readability on mobile */
    body {
        font-size: 16px;
        line-height: 1.7;
    }
    
    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
        gap: 0.8rem;            /* ⬆️ Gap ajustado */
    }
    
    .hero-title-logo {
        width: 2.5rem;          /* ⬆️ Más grande (era 1.75rem) */
        height: 2.5rem;
        padding: 0.4rem;
    }
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .section-content {
        font-size: 1rem;
    }
    
    .lead {
        font-size: 1.1rem;
    }
}

/* ===========================
   Smooth Scroll & Animations
   =========================== */

.article-section {
    scroll-margin-top: 100px;
}

@media (prefers-reduced-motion: no-preference) {
    .effect-card,
    .stat-card,
    .info-card {
        animation: fadeInUp 0.6s ease-out;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===========================
   Responsive Tables & Overflow Fix
   =========================== */

/* Table wrapper for horizontal scroll on mobile */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: var(--spacing-lg) 0;
}

/* Base table styles */
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    margin: var(--spacing-lg) 0;
    background: var(--bg-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.comparison-table table,
.data-table table {
    min-width: 600px; /* Ensures table doesn't get too cramped */
}

table thead {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    color: var(--text-white);
}

table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

table tbody tr:hover {
    background: var(--bg-lighter);
}

table tbody tr:last-child td {
    border-bottom: none;
}

/* Mobile responsive tables */
@media (max-width: 768px) {
    table {
        font-size: 0.85rem;
    }
    
    table th,
    table td {
        padding: var(--spacing-sm);
    }
    
    /* Alert for horizontal scroll */
    .table-wrapper::after {
        content: '← Desliza para ver más →';
        display: block;
        text-align: center;
        font-size: 0.75rem;
        color: var(--text-light);
        padding: var(--spacing-xs);
        font-style: italic;
    }
}

/* Fix highlight boxes on mobile */
@media (max-width: 768px) {
    .highlight-box {
        flex-direction: column;
        padding: var(--spacing-md);
    }
    
    .highlight-box i {
        font-size: 1.2rem;
    }
}

/* Fix key-stat boxes */
.key-stat {
    padding: var(--spacing-lg);
    text-align: center;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-teal));
    border-radius: 12px;
    color: var(--text-white);
    margin: var(--spacing-lg) 0;
}

.key-stat .stat-value {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
}

.key-stat .stat-label {
    font-size: 1.1rem;
    opacity: 0.95;
}

@media (max-width: 768px) {
    .key-stat .stat-value {
        font-size: 2rem;
    }
    
    .key-stat .stat-label {
        font-size: 0.95rem;
    }
}

/* Fix takeaway grid on mobile */
.takeaway-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

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

.takeaway-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-blue);
}

.takeaway-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.takeaway-content h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--primary-dark);
    font-size: 1.05rem;
}

.takeaway-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Fix images to prevent overflow */
.article-hero-image img,
.article-image img,
.section-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
}

.image-caption {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
    margin-top: var(--spacing-sm);
    text-align: center;
}

/* Fix example boxes */
.example-box,
.case-study {
    padding: var(--spacing-lg);
    background: var(--bg-lighter);
    border-radius: 12px;
    margin: var(--spacing-lg) 0;
    border-left: 4px solid var(--accent-green);
}

.example-box h4,
.case-study h4 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-dark);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

@media (max-width: 768px) {
    .example-box,
    .case-study {
        padding: var(--spacing-md);
    }
}

/* Fix discovery highlight */
.discovery-highlight {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #fff5f5, #fffaf0);
    border-radius: 12px;
    margin: var(--spacing-lg) 0;
    border-left: 4px solid var(--warning-orange);
}

.discovery-highlight i {
    color: var(--warning-orange);
    font-size: 2rem;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .discovery-highlight {
        flex-direction: column;
        padding: var(--spacing-md);
    }
    
    .discovery-highlight i {
        font-size: 1.5rem;
    }
}

/* Ensure all content respects container width */
.section-content > * {
    max-width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* Fix long URLs and code snippets */
.section-content a,
.section-content code {
    word-break: break-word;
    overflow-wrap: break-word;
}

/* Fix references section */
.references-list {
    list-style: none;
    counter-reset: ref-counter;
}

.references-list li {
    counter-increment: ref-counter;
    padding-left: 2.5rem;
    position: relative;
    margin-bottom: var(--spacing-md);
}

.references-list li::before {
    content: "[" counter(ref-counter) "]";
    position: absolute;
    left: 0;
    font-weight: 600;
    color: var(--primary-blue);
}

@media (max-width: 768px) {
    .references-list li {
        padding-left: 2rem;
        font-size: 0.9rem;
    }
}

/* Final safety: prevent any horizontal overflow */
body, html {
    max-width: 100%;
    overflow-x: hidden;
}

* {
    max-width: 100%;
}