/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #002395; /* French blue */
    --secondary-color: #FFFFFF; /* French white */
    --accent-color: #ED2939; /* French red */
    --text-primary: #1a1a1a;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-accent: #edf2f7;
    --border-color: #e2e8f0;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --font-primary: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="fleur-bg" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M20 10 Q25 5 30 10 Q25 15 20 20 Q15 15 10 10 Q15 5 20 10" fill="none" stroke="rgba(0,35,149,0.03)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23fleur-bg)"/></svg>');
}

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

/* Header & Navigation */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,0.95);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
}

.french-emblem {
    font-size: 1.5rem;
    filter: drop-shadow(0 2px 4px rgba(0, 35, 149, 0.2));
    animation: wave 3s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-5deg); }
    75% { transform: rotate(5deg); }
}

.brand-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
    font-family: var(--font-mono);
    text-shadow: 1px 1px 2px rgba(0, 35, 149, 0.1);
}

.brand-tagline {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
    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 0 100 100"><defs><pattern id="fleur" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M10 5 Q15 0 20 5 Q15 10 10 15 Q5 10 0 5 Q5 0 10 5" fill="none" stroke="rgba(255,255,255,0.15)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23fleur)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    font-family: var(--font-display);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.4;
}

.hero-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.meta-item {
    background: rgba(255,255,255,0.2);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.3);
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* About Section */
.about {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-family: var(--font-display);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
    background: linear-gradient(white, white) padding-box,
                linear-gradient(135deg, var(--primary-color), var(--accent-color)) border-box;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--font-mono);
    margin-bottom: 0.5rem;
}

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

/* Posts Section */
.posts {
    padding: 5rem 0;
}

.posts-grid {
    display: grid;
    gap: 2rem;
    margin-top: 3rem;
}

.post-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
    border-left: 4px solid var(--primary-color);
}

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

.post-number {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.2;
    font-family: var(--font-mono);
}

.post-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.post-title a {
    text-decoration: none;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.post-title a:hover {
    color: var(--primary-color);
}

.post-excerpt {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.post-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.meta-date, .meta-read-time {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--primary-color) 0%, #001a70 100%);
    color: white;
    padding: 3rem 0 1rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
    text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.1);
}

.footer-brand .ai-resources {
    margin-top: 1.5rem;
}

.footer-brand .ai-resources h4 {
    color: white;
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
    opacity: 0.9;
}

.footer-links p {
    opacity: 0.7;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.footer-links .ai-resources {
    margin-top: 1rem;
}

.footer-links .ai-resources h4 {
    color: white;
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
    opacity: 0.9;
}

.ai-resources .ai-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.ai-resources .ai-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.85rem;
    padding: 0.2rem 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.ai-resources .ai-links a:hover {
    color: white;
    background: rgba(255, 255, 255, 0.2);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: 1rem;
    text-align: center;
    opacity: 0.7;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-meta {
        gap: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .post-card {
        padding: 1.5rem;
    }
    
    .post-number {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .post-title {
        font-size: 1.25rem;
    }
}

/* Typography improvements */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

p {
    margin-bottom: 1rem;
}

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

/* Animation utilities */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

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

/* Focus states for accessibility */
.nav-link:focus,
.post-title a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header, .footer {
        display: none;
    }
    
    .hero {
        background: none;
        color: var(--text-primary);
    }
}

/* Article Page Styles */
.article {
    max-width: none;
}

.article-header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--accent-color) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.article-header::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 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.article-series {
    background: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
}

.article-date, .article-read-time {
    background: rgba(255,255,255,0.2);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
}

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    position: relative;
    z-index: 1;
}

.article-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.4;
    position: relative;
    z-index: 1;
}

.article-content {
    padding: 4rem 0;
    background: var(--bg-primary);
}

.prose {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.prose h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.prose h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.prose p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

.prose ul, .prose ol {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.prose li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.prose ul li {
    list-style-type: none;
    position: relative;
    padding-left: 1.5rem;
}

.prose ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.prose ol li {
    padding-left: 0.5rem;
}

.prose strong {
    color: var(--primary-color);
    font-weight: 600;
}

.prose em {
    font-style: italic;
    color: var(--text-secondary);
}

.article-navigation {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    gap: 2rem;
}

.nav-prev, .nav-next {
    flex: 1;
}

.nav-prev {
    text-align: left;
}

.nav-next {
    text-align: right;
}

.nav-prev a, .nav-next a {
    text-decoration: none;
    color: var(--text-primary);
    display: block;
    transition: color 0.3s ease;
}

.nav-prev a:hover, .nav-next a:hover {
    color: var(--primary-color);
}

.nav-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 0.5rem;
}

.nav-title {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
}

.article-footer {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.article-footer p {
    margin: 0;
    font-style: italic;
    color: var(--text-secondary);
}

/* Responsive adjustments for article pages */
@media (max-width: 768px) {
    .article-header {
        padding: 3rem 0;
    }
    
    .article-title {
        font-size: 2rem;
    }
    
    .article-subtitle {
        font-size: 1.1rem;
    }
    
    .article-meta {
        gap: 1rem;
    }
    
    .prose {
        font-size: 1rem;
    }
    
    .prose h2 {
        font-size: 1.75rem;
    }
    
    .prose h3 {
        font-size: 1.375rem;
    }
    
    .article-content {
        padding: 3rem 0;
    }
}

@media (max-width: 480px) {
    .article-header {
        padding: 2rem 0;
    }
    
    .article-title {
        font-size: 1.75rem;
    }
    
    .article-meta {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }
    
    .article-content {
        padding: 2rem 0;
    }
    
    .prose {
        padding: 0 1rem;
    }
    
    .prose h2 {
        font-size: 1.5rem;
    }
    
    .prose h3 {
        font-size: 1.25rem;
    }
}