/* Estilos generales - TechLab v4b - Versión Responsive */
:root {
    --primary-color: #ff5722;
    --primary-dark: #e64a19;
    --primary-light: #ffccbc;
    --secondary-color: #2196f3;
    --secondary-dark: #1976d2;
    --secondary-light: #bbdefb;
    --dark-color: #263238;
    --dark-color-light: #37474f;
    --light-color: #ffffff;
    --gray-color: #eceff1;
    --gray-dark: #b0bec5;
    --text-color: #263238;
    --text-color-light: #78909c;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --transition: all 0.3s ease;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 5px 15px rgba(0, 0, 0, 0.15);
    --border-radius: 4px;
    --font-main: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Roboto Slab', Georgia, 'Times New Roman', serif;
}

/* Importación de fuentes */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=Roboto+Slab:wght@400;500;600;700&display=swap');

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

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

ul, ol {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Botones */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.9rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

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

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--light-color);
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

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

/* Header */
.main-header {
    background-color: var(--light-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-top {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: 8px 0;
    font-size: 0.85rem;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.current-date {
    font-weight: 500;
}

.weather {
    display: flex;
    align-items: center;
    gap: 5px;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.social-links {
    display: flex;
    gap: 10px;
}

.social-links a {
    color: var(--light-color);
    font-size: 0.9rem;
}

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

.user-actions {
    display: flex;
    gap: 15px;
}

.btn-subscribe {
    background-color: var(--primary-color);
    color: var(--light-color);
    padding: 5px 12px;
    border-radius: 3px;
    font-size: 0.85rem;
    font-weight: 500;
}

.btn-login {
    color: var(--light-color);
    font-size: 0.85rem;
    font-weight: 500;
}

.header-main {
    padding: 15px 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
}

.logo-text .highlight {
    color: var(--primary-color);
}

.main-nav ul {
    display: flex;
    gap: 25px;
}

.main-nav a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

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

.header-actions {
    display: flex;
    gap: 15px;
}

.search-toggle,
.menu-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
}

.menu-toggle {
    display: none;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-color);
    margin: 5px 0;
    transition: var(--transition);
}

.header-categories {
    background-color: var(--gray-color);
    padding: 10px 0;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.category-menu {
    display: flex;
    gap: 20px;
    padding-bottom: 5px;
}

.category-menu::-webkit-scrollbar {
    height: 3px;
}

.category-menu::-webkit-scrollbar-thumb {
    background-color: var(--gray-dark);
    border-radius: 3px;
}

.category-menu a {
    color: var(--text-color-light);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
}

.category-menu a:hover {
    color: var(--primary-color);
}

/* Estilos para submenús */
.has-submenu {
    position: relative;
}

.has-submenu > a::after {
    content: '\f107';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    margin-left: 5px;
    font-size: 0.8rem;
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--light-color);
    box-shadow: var(--shadow);
    border-radius: var(--border-radius);
    width: 200px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 110;
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu ul {
    padding: 0;
}

.submenu li {
    padding: 0;
}

.submenu a {
    display: block;
    padding: 8px 15px;
    color: var(--text-color);
    font-size: 0.9rem;
    transition: var(--transition);
}

.submenu a:hover {
    background-color: var(--gray-color);
    color: var(--primary-color);
}

/* Estilos para submenús en dispositivos móviles */
.submenu-active .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .category-menu {
        position: relative;
    }
    
    .submenu {
        position: absolute;
        width: 100%;
        max-width: 250px;
        z-index: 120;
    }
    
    .has-submenu.submenu-active > a::after {
        transform: rotate(180deg);
    }
}

/* Search Overlay */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(38, 50, 56, 0.95);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.search-overlay.active {
    opacity: 1;
    visibility: visible;
}

.search-container {
    width: 100%;
    max-width: 600px;
    position: relative;
}

.search-form {
    display: flex;
    position: relative;
}

.search-form input {
    width: 100%;
    padding: 15px 50px 15px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    background-color: var(--light-color);
    color: var(--text-color);
}

.search-form button {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    width: 50px;
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 1.2rem;
    cursor: pointer;
}

.search-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: var(--light-color);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100%;
    background-color: var(--light-color);
    z-index: 150;
    transition: var(--transition);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-container {
    padding: 20px;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.mobile-menu-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
}

.mobile-nav ul {
    margin-bottom: 30px;
}

.mobile-nav li {
    margin-bottom: 15px;
}

.mobile-nav a {
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: 500;
}

.mobile-nav a:hover {
    color: var(--primary-color);
}

.mobile-categories h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.mobile-categories ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mobile-categories .has-submenu {
    position: relative;
}

.mobile-categories .submenu {
    position: static;
    width: 100%;
    box-shadow: none;
    border-radius: 0;
    background-color: var(--gray-color);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: max-height 0.3s ease;
    margin-top: 5px;
}

.mobile-categories .has-submenu.submenu-active .submenu {
    max-height: 300px;
}

.mobile-categories .submenu a {
    padding: 8px 15px;
    font-size: 0.85rem;
}

.mobile-categories a {
    color: var(--text-color-light);
    font-size: 0.9rem;
}

.mobile-categories a:hover {
    color: var(--primary-color);
}

.mobile-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-color);
}

/* Featured News Section */
.featured-news {
    padding: 30px 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

.featured-main {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    height: 500px;
    box-shadow: var(--shadow);
}

.article-image {
    width: 100%;
    height: 100%;
    background-color: var(--gray-dark);
    background-size: cover;
    background-position: center;
    transition: transform 0.5s ease;
}

.featured-main:hover .article-image {
    transform: scale(1.05);
}

.article-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.8) 100%);
}

.article-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px;
    color: var(--light-color);
}

.article-category {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--light-color);
    padding: 5px 10px;
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.featured-main h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 15px;
    line-height: 1.3;
}

.featured-main p {
    font-size: 1rem;
    margin-bottom: 20px;
    opacity: 0.9;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.meta-author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.author-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: var(--gray-dark);
}

.meta-date {
    font-size: 0.85rem;
    opacity: 0.8;
}

.article-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.featured-secondary {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.secondary-article {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    height: 240px;
    box-shadow: var(--shadow);
}

.secondary-article:hover .article-image {
    transform: scale(1.05);
}

.secondary-article h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

/* Trending Section */
.trending-section {
    padding: 50px 0 30px;
    background-color: var(--gray-color);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-color);
    position: relative;
    padding-left: 15px;
}

.section-header h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 5px;
    background-color: var(--primary-color);
    border-radius: 3px;
}

.view-all {
    color: var(--text-color-light);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
}

.view-all:hover {
    color: var(--primary-color);
}

.trending-slider {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.trending-card {
    background-color: var(--light-color);
    background-size: cover;
    background-position: center;
    position: relative;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 15px;
    transition: var(--transition);
}

.trending-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    border-radius: var(--border-radius);
    z-index: 1;
}

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

.trending-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.8;
    line-height: 1;
    position: relative;
    z-index: 2;
}

.trending-content h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
    color: var(--light-color);
    position: relative;
    z-index: 2;
}

.trending-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--gray-color);
    position: relative;
    z-index: 2;
}

.meta-category {
    font-weight: 500;
}

.meta-views {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Lab Results Section */
.lab-results {
    padding: 50px 0;
}

.lab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.lab-card {
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.lab-media {
    position: relative;
    height: 200px;
}

.lab-image {
    width: 100%;
    height: 100%;
    background-color: var(--gray-dark);
    transition: transform 0.5s ease;
}

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

.lab-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--secondary-color);
    color: var(--light-color);
    padding: 5px 10px;
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: 500;
}

.lab-content {
    padding: 20px;
}

.lab-category {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 10px;
}

.lab-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.lab-card p {
    color: var(--text-color-light);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.lab-chart {
    margin: 20px 0;
}

.chart-bar {
    background-color: var(--primary-color);
    color: var(--light-color);
    padding: 8px 15px;
    border-radius: 3px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 5px;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-weight: 500;
    font-size: 0.9rem;
}

/* Tutorials Section */
.tutorials-section {
    padding: 50px 0;
    background-color: var(--gray-color);
}

.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.tutorial-card {
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.tutorial-media {
    position: relative;
    height: 180px;
}

.tutorial-image {
    width: 100%;
    height: 100%;
    background-color: var(--gray-dark);
    transition: transform 0.5s ease;
}

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

.tutorial-difficulty {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--dark-color-light);
    color: var(--light-color);
    padding: 5px 10px;
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: 500;
}

.tutorial-content {
    padding: 20px;
}

.tutorial-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.tutorial-card p {
    color: var(--text-color-light);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.tutorial-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 0.85rem;
    color: var(--text-color-light);
}

.meta-time, .meta-tools {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Podcast Section */
.podcast-section {
    padding: 50px 0;
}

.podcast-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(450px, 1fr));
    gap: 30px;
}

.podcast-card {
    display: flex;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.podcast-media {
    position: relative;
    width: 150px;
    min-width: 150px;
}

.podcast-image {
    width: 100%;
    height: 100%;
    background-color: var(--gray-dark);
}

.podcast-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--light-color);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.podcast-play:hover {
    background-color: var(--primary-dark);
    transform: translate(-50%, -50%) scale(1.1);
}

.podcast-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--light-color);
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 0.8rem;
}

.podcast-content {
    padding: 20px;
    flex: 1;
}

.podcast-episode {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 10px;
}

.podcast-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.podcast-card p {
    color: var(--text-color-light);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.podcast-platforms {
    display: flex;
    gap: 15px;
}

.podcast-platforms a {
    color: var(--text-color-light);
    font-size: 1.2rem;
    transition: var(--transition);
}

.podcast-platforms a:hover {
    color: var(--primary-color);
}

/* Newsletter Section */
.newsletter-section {
    padding: 50px 0;
    background-color: var(--dark-color);
    color: var(--light-color);
}

.newsletter-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-content h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.newsletter-content p {
    color: var(--gray-dark);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.newsletter-form {
    display: flex;
    max-width: 500px;
    margin: 0 auto 20px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    font-size: 1rem;
}

.newsletter-form .btn-subscribe {
    background-color: var(--primary-color);
    color: var(--light-color);
    padding: 12px 25px;
    border: none;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-form .btn-subscribe:hover {
    background-color: var(--primary-dark);
}

.newsletter-info {
    font-size: 0.85rem;
    color: var(--gray-dark);
}

.newsletter-info a {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Footer */
.main-footer {
    background-color: var(--dark-color-light);
    color: var(--light-color);
    padding: 50px 0 0;
}

.footer-main {
    padding-bottom: 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.footer-about p {
    margin-bottom: 20px;
    color: var(--gray-dark);
    font-size: 0.9rem;
}

.footer-about .social-links {
    margin-top: 20px;
}

.footer-about .social-links a {
    font-size: 1.2rem;
    margin-right: 15px;
}

.footer-nav h3,
.footer-categories h3,
.footer-contact h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-nav h3::after,
.footer-categories h3::after,
.footer-contact h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

.footer-nav ul,
.footer-categories ul,
.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-nav a,
.footer-categories a {
    color: var(--gray-dark);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-nav a:hover,
.footer-categories a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-contact ul li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--gray-dark);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.footer-contact ul li i {
    color: var(--primary-color);
    font-size: 1rem;
    margin-top: 3px;
}

.footer-bottom {
    background-color: var(--dark-color);
    padding: 20px 0;
}

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

.copyright {
    color: var(--gray-dark);
    font-size: 0.85rem;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--gray-dark);
    font-size: 0.85rem;
}

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

/* Media Queries para Responsive Design */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
    
    .featured-main {
        height: 450px;
    }
    
    .featured-main h2 {
        font-size: 1.8rem;
    }
    
    .lab-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
    
    .podcast-grid {
        grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }
    
    .main-nav {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-main {
        height: 400px;
    }
    
    .featured-secondary {
        flex-direction: row;
    }
    
    .secondary-article {
        flex: 1;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }
    
    .top-bar {
        flex-direction: column;
        gap: 10px;
    }
    
    .top-bar-left,
    .top-bar-right {
        width: 100%;
        justify-content: center;
    }
    
    .featured-secondary {
        flex-direction: column;
    }
    
    .secondary-article {
        height: 200px;
    }
    
    .trending-slider {
        grid-template-columns: 1fr;
    }
    
    .lab-grid,
    .tutorials-grid {
        grid-template-columns: 1fr;
    }
    
    .podcast-card {
        flex-direction: column;
    }
    
    .podcast-media {
        width: 100%;
        height: 200px;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form input {
        border-radius: var(--border-radius);
        margin-bottom: 10px;
    }
    
    .newsletter-form .btn-subscribe {
        border-radius: var(--border-radius);
        width: 100%;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .header-top {
        display: none;
    }
    
    .featured-main {
        height: 350px;
    }
    
    .featured-main h2 {
        font-size: 1.5rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }
}