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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
    --max-width: 1200px;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header y Navegación */
header {
    background-color: var(--bg-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

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

.logo h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Featured Articles */
.featured-articles {
    padding: 4rem 0;
    background-color: var(--bg-light);
}

.featured-articles h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-color);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.article-card {
    background: var(--bg-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.article-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-image {
    font-size: 4rem;
}

.article-content {
    padding: 1.5rem;
}

.article-content h3 {
    margin-bottom: 0.5rem;
}

.article-content h3 a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.article-content h3 a:hover {
    color: var(--primary-color);
}

.article-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.article-content p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

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

.read-more:hover {
    color: var(--secondary-color);
}

/* About Preview */
.about-preview {
    padding: 4rem 0;
    text-align: center;
}

.about-preview h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.about-preview p {
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: var(--transition);
}

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

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.last-updated {
    opacity: 0.9;
    font-size: 0.9rem;
}

/* Page Content */
.page-content {
    padding: 3rem 0;
}

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

.content-article h2 {
    font-size: 1.8rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.content-article h3 {
    font-size: 1.4rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.content-article p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: var(--text-color);
}

.content-article ul,
.content-article ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.content-article li {
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

.content-article a {
    color: var(--primary-color);
    text-decoration: none;
}

.content-article a:hover {
    text-decoration: underline;
}

/* Contact Form */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.contact-info > p {
    margin-bottom: 2rem;
    color: var(--text-light);
}

.contact-details {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.contact-details h3 {
    margin-bottom: 1rem;
}

.contact-details p {
    margin-bottom: 0.5rem;
}

.contact-form {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
}

.contact-form h3 {
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.form-note {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Articles List */
.articles-list {
    padding: 3rem 0;
}

.articles-list h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

.article-item {
    background-color: var(--bg-color);
    padding: 2rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.article-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.article-item h2 {
    margin-bottom: 0.5rem;
}

.article-item h2 a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.article-item h2 a:hover {
    color: var(--primary-color);
}

.article-item-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.article-item p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

/* Single Article */
.single-article {
    padding: 3rem 0;
}

.article-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.article-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.article-header-meta {
    color: var(--text-light);
    font-size: 1rem;
}

.article-body {
    max-width: 800px;
    margin: 0 auto;
}

.article-body h2 {
    font-size: 1.8rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.article-body h3 {
    font-size: 1.4rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.article-body p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: var(--text-color);
}

.article-body ul,
.article-body ol {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
}

.article-body li {
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

.article-body code {
    background-color: var(--bg-light);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.article-body pre {
    background-color: var(--bg-light);
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.article-body pre code {
    background: none;
    padding: 0;
}

.article-body blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    color: var(--text-light);
    font-style: italic;
}

/* Footer */
footer {
    background-color: var(--text-color);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .hero h2 {
        font-size: 2rem;
    }

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

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

    .page-header h1 {
        font-size: 2rem;
    }

    .content-article h2 {
        font-size: 1.5rem;
    }

    .article-header h1 {
        font-size: 2rem;
    }
}

/* Performance Optimizations */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Print Styles */
@media print {
    header,
    footer,
    .hamburger {
        display: none;
    }

    body {
        color: #000;
        background: #fff;
    }
}