/* ===== Variables CSS ===== */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* ===== Reset y Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    font-size: 16px;
}

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

/* ===== Header & Navigation ===== */
.site-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

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

.nav-brand a {
    text-decoration: none;
    color: var(--text-primary);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle-label span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: 0.3s;
}

/* ===== Main Content ===== */
.main-content {
    min-height: calc(100vh - 200px);
    padding: var(--spacing-xl) 0;
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Posts Grid ===== */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.post-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.post-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.post-card-image {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
}

.post-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.post-card:hover .post-card-image img {
    transform: scale(1.05);
}

.post-card-image .category-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 1;
}

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

.post-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.category-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-ia {
    background: #dbeafe;
    color: #1e40af;
}

.category-blockchain {
    background: #fef3c7;
    color: #92400e;
}

.category-tutoriales {
    background: #d1fae5;
    color: #065f46;
}

.post-card-header time {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.post-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.4;
}

.post-card-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ===== Single Post ===== */
.post {
    max-width: 800px;
    margin: 0 auto;
}

.post-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.post-category {
    margin-bottom: var(--spacing-sm);
}

.post-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
    color: var(--text-primary);
}

.post-meta {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.post-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.post-content h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.post-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

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

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

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

.post-content code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.4rem;
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

.post-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
}

.post-content pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.post-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.post-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.post-tags {
    margin-bottom: var(--spacing-md);
}

.tags-label {
    font-weight: 600;
    margin-right: var(--spacing-sm);
}

.tag {
    display: inline-block;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    margin-right: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.post-share {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.share-label {
    font-weight: 600;
}

.share-button {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.share-button:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.related-posts {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.related-posts h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
}

/* ===== Page ===== */
.page {
    max-width: 800px;
    margin: 0 auto;
}

.page-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.page-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.page-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

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

.footer-about h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.footer-about p {
    color: var(--text-secondary);
}

.footer-links h4,
.footer-social h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

.social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.powered-by {
    margin-top: var(--spacing-xs);
    font-size: 0.85rem;
}

/* ===== Categories Section ===== */
.categories-section {
    margin: var(--spacing-xl) 0;
}

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

.category-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all 0.3s ease;
}

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

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

.category-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.category-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: background 0.3s ease;
}

.category-link:hover {
    background: var(--secondary-color);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-md);
    }

    .nav-toggle:checked ~ .nav-menu {
        left: 0;
    }

    .nav-toggle-label {
        display: flex;
    }

    .hero h1 {
        font-size: 2rem;
    }

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

    .post-title {
        font-size: 2rem;
    }

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

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

    .social-links {
        align-items: center;
    }

    /* Búsqueda responsive */
    .search-bar-container {
        padding: var(--spacing-sm) 0;
    }

    .search-input {
        font-size: 0.9rem;
        padding: 0.65rem 2.8rem 0.65rem 0.9rem;
    }

    .search-results {
        max-height: 60vh;
    }

    .search-result-link {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .search-result-image {
        width: 100%;
        height: 150px;
    }

    /* Filtros responsive */
    .tag-filter-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .tag-filter-btn {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }

    .active-filters {
        flex-direction: column;
        align-items: flex-start;
    }

    /* Posts relacionados y sidebar */
    .post-sidebar-layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .post-sidebar {
        order: -1;
    }

    .popular-posts-widget {
        position: static;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .post-title {
        font-size: 1.75rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* ===== Botones de Referidos ===== */
.referral-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.referral-box h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.referral-box p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.referral-btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: white;
    color: #667eea;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.referral-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: #f0f0f0;
}

.referral-btn.binance {
    background: linear-gradient(135deg, #F3BA2F 0%, #F0B90B 100%);
    color: #000;
}

.referral-btn.binance:hover {
    background: linear-gradient(135deg, #F0B90B 0%, #D4A108 100%);
}

.referral-btn.coinbase {
    background: linear-gradient(135deg, #0052FF 0%, #0041CC 100%);
    color: white;
}

.referral-btn.coinbase:hover {
    background: linear-gradient(135deg, #0041CC 0%, #003399 100%);
}

.affiliate-disclaimer {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-sm);
    font-style: italic;
}

/* Variante simple para botón inline */
.inline-referral-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
    margin: var(--spacing-sm) 0;
}

.inline-referral-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== Barra de Búsqueda ===== */
.search-bar-container {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-md) 0;
    position: relative;
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.search-input {
    flex: 1;
    padding: 0.75rem 3rem 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-button,
.search-clear {
    position: absolute;
    right: 10px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: color 0.3s ease;
    border-radius: var(--radius-sm);
}

.search-button {
    right: 10px;
}

.search-clear {
    right: 45px;
    color: var(--text-secondary);
}

.search-button:hover,
.search-clear:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xs);
    box-shadow: var(--shadow-xl);
    max-height: 70vh;
    overflow-y: auto;
    z-index: 1000;
}

.search-results-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.search-results-header p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.search-results-list {
    padding: var(--spacing-sm);
}

.search-result-item {
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: background 0.3s ease;
}

.search-result-item:hover {
    background: var(--bg-secondary);
}

.search-result-link {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    text-decoration: none;
    color: inherit;
}

.search-result-image {
    position: relative;
    width: 120px;
    height: 90px;
    flex-shrink: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.search-result-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.search-result-image .category-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
}

.search-result-content {
    flex: 1;
}

.search-result-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text-primary);
}

.search-result-title mark {
    background: #fef3c7;
    color: #92400e;
    padding: 0 0.2rem;
}

.search-result-excerpt {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-xs) 0;
    line-height: 1.5;
}

.search-result-excerpt mark {
    background: #fef3c7;
    color: #92400e;
    padding: 0 0.2rem;
}

.search-result-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.tag-small {
    display: inline-block;
    background: var(--bg-tertiary);
    padding: 0.1rem 0.4rem;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
}

.search-no-results {
    padding: var(--spacing-xl);
    text-align: center;
}

.search-no-results p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.search-suggestion {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.search-results-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    text-align: center;
}

.search-results-footer p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== Filtro por Tags ===== */
.tag-filter-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

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

.tag-filter-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.clear-filter-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.clear-filter-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.tag-filter-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag-filter-btn {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tag-filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.tag-filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.active-filters {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.active-filters-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.active-filters-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.active-filter-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: var(--primary-color);
    color: white;
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 500;
}

.remove-filter {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0;
    margin-left: 0.2rem;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.remove-filter:hover {
    background: rgba(255, 255, 255, 0.2);
}

.no-tag-results {
    grid-column: 1 / -1;
    padding: var(--spacing-xl);
    text-align: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.no-tag-results p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ===== Posts Populares Widget ===== */
.popular-posts-widget {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    position: sticky;
    top: 100px;
}

.widget-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.popular-posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.popular-post-item {
    transition: transform 0.3s ease;
}

.popular-post-item:hover {
    transform: translateX(4px);
}

.popular-post-link {
    display: flex;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: inherit;
}

.popular-post-image {
    width: 80px;
    height: 60px;
    flex-shrink: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.popular-post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.popular-post-content {
    flex: 1;
}

.popular-post-content .category-badge {
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
    margin-bottom: 0.3rem;
}

.popular-post-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0.3rem 0;
    color: var(--text-primary);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.popular-post-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ===== Layout Posts Relacionados con Sidebar ===== */
.post-sidebar-layout {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.related-posts {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-xl);
}

.related-posts h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
}

.related-posts-intro {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-lg);
}

.no-related-posts {
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

/* ===== Utilities ===== */
.text-center {
    text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

/* ===== NUEVOS ESTILOS PARA PÁGINA PRINCIPAL ===== */

/* Hero Moderno */
.hero-modern {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(90deg, #fff, #f0f0f0, #fff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Categorías Showcase */
.categories-showcase {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

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

.category-card-modern {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.category-card-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    transition: opacity 0.3s ease;
}

.category-ia {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
}

.category-ia::before {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.category-blockchain {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.category-blockchain::before {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.category-tutoriales {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
}

.category-tutoriales::before {
    background: linear-gradient(135deg, #10b981, #059669);
}

.category-card-modern:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.category-card-modern:hover::before {
    opacity: 0.15;
}

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.category-card-modern h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.category-card-modern p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.category-arrow {
    margin-top: auto;
    font-size: 1.5rem;
    font-weight: 700;
    transition: transform 0.3s ease;
}

.category-card-modern:hover .category-arrow {
    transform: translateX(8px);
}

/* Latest Posts Section */
.latest-posts {
    padding: var(--spacing-xl) 0;
}

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

.posts-more {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Newsletter Section */
.newsletter-section {
    padding: var(--spacing-xl) 0;
}

.newsletter-box {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    color: white;
    box-shadow: var(--shadow-xl);
}

.newsletter-content h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.newsletter-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

.newsletter-form-inline {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.newsletter-form-inline input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    min-width: 200px;
}

.newsletter-form-inline button {
    padding: 1rem 2rem;
    background: white;
    color: var(--primary-color);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.newsletter-form-inline button:hover {
    transform: scale(1.05);
}

.newsletter-disclaimer {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-top: var(--spacing-md);
}

/* Featured Section */
.featured-section {
    padding: var(--spacing-xl) 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.featured-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
}

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

.featured-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.placeholder-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    font-weight: 800;
    background: var(--gradient-primary);
    color: white;
}

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

.featured-content time {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.featured-content h3 {
    margin: var(--spacing-xs) 0;
    font-size: 1.25rem;
}

.featured-content h3 a {
    text-decoration: none;
    color: inherit;
}

.featured-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

/* About Preview */
.about-preview {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin: var(--spacing-xl) 0;
}

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

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

.about-text p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.about-highlights {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.about-highlights li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

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

.tech-icons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.tech-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    animation: float 3s ease-in-out infinite;
}

.tech-icon:nth-child(2) { animation-delay: 0.5s; }
.tech-icon:nth-child(3) { animation-delay: 1s; }
.tech-icon:nth-child(4) { animation-delay: 1.5s; }
.tech-icon:nth-child(5) { animation-delay: 2s; }
.tech-icon:nth-child(6) { animation-delay: 2.5s; }

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

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

/* CTA Section */
.cta-section {
    padding: var(--spacing-xl) 0;
}

.cta-box {
    background: var(--gradient-dark);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    color: white;
}

.cta-box h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.cta-box p {
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-actions {
        flex-direction: column;
    }

    .hero-stats {
        gap: var(--spacing-md);
    }

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

    .newsletter-form-inline {
        flex-direction: column;
    }

    .newsletter-form-inline input,
    .newsletter-form-inline button {
        width: 100%;
    }
}