/* VentajaQuant - Global Styles */
:root {
    --primary-color: #2d3748;
    --secondary-color: #1a202c;
    --accent-color: #4a5568;
    --text-dark: #2d3748;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
}

/* Header Styles */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.article-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Breadcrumb */
.breadcrumb {
    margin: 120px 0 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

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

.back-link {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    margin-bottom: 2rem;
    font-weight: 500;
}

/* Article Content */
.article-content {
    background: white;
    border-radius: 15px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
}

/* Typography */
h1 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
    line-height: 1.2;
    text-align: center;
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 1rem;
}

h2 {
    color: var(--text-dark);
    font-size: 1.8rem;
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

h3 {
    color: #374151;
    font-size: 1.4rem;
    margin: 2rem 0 1rem;
}

h4 {
    color: #4b5563;
    font-size: 1.2rem;
    margin: 1.5rem 0 0.8rem;
}

p {
    margin-bottom: 1.2rem;
    text-align: justify;
}

/* Meta Info */
.meta-info {
    text-align: center;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 10px;
    margin: 1.5rem 0 2rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Difficulty Badges - CORREGIDO */
.difficulty {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
}

.difficulty.principiante {
    background: #c6f6d5;
    color: #22543d;
}

.difficulty.intermedio {
    background: #fed7aa;
    color: #ea580c;
}

.difficulty.avanzado {
    background: #fecaca;
    color: #dc2626;
}

/* Content Boxes */
.highlight-box {
    background: linear-gradient(135deg, rgba(45, 55, 72, 0.1), rgba(26, 32, 44, 0.1));
    border: 1px solid rgba(45, 55, 72, 0.3);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.info-box {
    background: #f0f9ff;
    border: 1px solid #0ea5e9;
    border-radius: 12px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.warning-box {
    background: #fef3c7;
    border: 1px solid var(--warning-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.success-box {
    background: #f0fdf4;
    border: 1px solid var(--success-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.formula-box {
    background: var(--bg-light);
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    font-family: 'Courier New', monospace;
    text-align: center;
    font-size: 1.1rem;
}

.quote-box {
    background: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
}

/* Cards and Grids */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.article-card {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    border: 1px solid #e2e8f0;
    border-radius: 15px;
    padding: 2rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-color: #cbd5e1;
}

.article-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 600;
}

.article-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* Tables */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.comparison-table th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

.comparison-table tr:hover {
    background: rgba(45, 55, 72, 0.05);
}

/* Buttons */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    margin: 1rem 0 3rem;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(45, 55, 72, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(45, 55, 72, 0.4);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .container,
    .article-container {
        padding: 0 15px;
    }
    
    .article-content {
        padding: 2rem 1.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    nav {
        padding: 1rem;
    }
}