/* Variables CSS pour le thème journal scientifique - Futura Sciences Modern */
:root {
    /* Palette principale - Bleu professionnel */
    --primary-dark: #171940;      /* Bleu très foncé */
    --primary-medium: #003d6a;    /* Bleu medium */
    --primary-light: #00638e;     /* Bleu clair */
    --primary-alt: #0066b3;       /* Bleu accent */
    --primary-bg: #f5f7fb;        /* Gris bleu très clair */
    
    --text-dark: #171940;         /* Texte principal */
    --text-color: #2c3e50;        /* Texte secondaire */
    --text-light: #5a6c7d;        /* Texte léger */
    --text-muted: #8b95a5;        /* Texte atténué */
    
    --bg-color: #ffffff;          /* Blanc principal */
    --bg-light: #f8f9fa;          /* Gris très clair */
    --bg-section: #f0f4f8;        /* Gris bleu section */
    --bg-accent: #e8f0f7;         /* Gris bleu accent */
    
    --border-color: #d1dce6;      /* Bordure gris bleu */
    --border-light: #e5e8ed;      /* Bordure légère */
    --border-accent: #00638e;     /* Bordure accent */
    
    --accent-success: #27ae60;
    --accent-info: #00638e;
    --accent-warning: #f39c12;
    --accent-danger: #e74c3c;
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Georgia', 'Times New Roman', serif;
    --font-mono: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    --radius: 4px;
    --radius-lg: 8px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
}

/* Reset et styles de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typographie */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header - Style Futura Sciences */
.header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    z-index: 2;
}

.brand-logo {
    height: 40px;
    width: auto;
    filter: brightness(0) saturate(100%) invert(8%) sepia(59%) saturate(1191%) hue-rotate(204deg) brightness(101%) contrast(101%);
}

.brand-text h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
    color: var(--primary-dark);
    font-weight: 700;
    letter-spacing: -0.5px;
    font-family: var(--font-heading);
}

.brand-text p {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
    background-color: transparent;
    padding: 0;
}

.nav-link {
    font-weight: 500;
    color: var(--text-color);
    position: relative;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    font-size: 0.8rem;
    border-radius: 0;
}

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

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: var(--spacing-sm);
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

.hamburger span {
    width: 22px;
    height: 2px;
    background-color: var(--primary-dark);
    transition: var(--transition);
}

/* Sections communes */
section {
    padding: var(--spacing-xxl) 0;
}

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

.section-header h2 {
    margin-bottom: var(--spacing-md);
    font-size: 2.25rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.articles-navigation {
    background-color: var(--bg-section);
    padding: var(--spacing-xxl) 0;
}

.articles-categories {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xxl);
    flex-wrap: wrap;
}

.category-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: 1px solid var(--border-accent);
    background-color: var(--bg-color);
    color: var(--text-color);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    font-size: 0.8rem;
    border-radius: var(--radius);
}

.category-btn:hover,
.category-btn.active {
    background-color: var(--primary-medium);
    color: white;
    border-color: var(--primary-medium);
    transform: translateY(-2px);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.article-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.article-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-light);
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-medium);
}

.article-image {
    height: 200px;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.article-content {
    padding: var(--spacing-lg);
}

.article-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--primary-medium);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-radius: var(--radius);
}

.article-content h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
    font-size: 1.2rem;
    line-height: 1.4;
}

.article-content p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
    line-height: 1.6;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

/* Section Articles Récents */
.recent-articles {
    background-color: var(--bg-color);
}

.featured-article {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xxl);
    padding: var(--spacing-xxl);
    background-color: var(--bg-color);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    position: relative;
}

.featured-article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-medium);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.featured-tag {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--accent-success);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius);
}

.featured-image {
    border-radius: var(--radius);
    overflow: hidden;
}

.read-more-btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--primary-medium);
    color: white;
    font-weight: 600;
    transition: var(--transition);
    margin-top: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-radius: var(--radius);
    font-size: 0.8rem;
    text-decoration: none;
}

.read-more-btn:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
}

.recent-card {
    padding: var(--spacing-lg);
    background-color: var(--bg-color);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}

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

.recent-card:hover {
    transform: translateX(5px);
    border-color: var(--primary-light);
}

.recent-card h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
    font-size: 1rem;
}

.recent-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
}

.recent-card .date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.featured-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-dark);
}

.featured-content p {
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
}

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

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

/* Section À Propos et Contact */
.about-contact {
    background-color: var(--bg-section);
    padding: var(--spacing-xxl) 0;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--bg-color);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}

.contact-item:hover {
    transform: translateY(-3px);
    border-color: var(--primary-medium);
}

.contact-item i {
    font-size: 1.3rem;
    color: var(--primary-medium);
    width: 30px;
    text-align: center;
    transition: var(--transition);
}

.contact-item:hover i {
    color: var(--primary-light);
    transform: scale(1.1);
}

.profile-image img {
    width: 150px;
    height: 150px;
    border: 2px solid var(--primary-medium);
    border-radius: 50%;
    position: relative;
    z-index: 2;
}

.profile-image::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 150px;
    background-color: var(--primary-light);
    border-radius: 50%;
    z-index: 1;
    opacity: 0.2;
}

.expertise-tag {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-accent);
    color: var(--text-dark);
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid var(--border-accent);
    border-radius: var(--radius);
    transition: var(--transition);
}

.expertise-tag:hover {
    background-color: var(--primary-medium);
    color: white;
    transform: translateY(-2px);
}

/* Section Projets */
.academic-projects {
    background-color: var(--bg-color);
    padding: var(--spacing-xxl) 0;
}

.project-card {
    padding: var(--spacing-xl);
    border: 1px solid var(--border-light);
    background-color: var(--bg-color);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card:hover {
    border-color: var(--primary-medium);
    transform: translateY(-5px);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-medium);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    border-radius: 4px;
}

.project-icon i {
    font-size: 1.5rem;
    color: white;
}

.tech-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-accent);
    color: var(--primary-medium);
    font-size: 0.7rem;
    font-weight: 600;
    border: 1px solid var(--border-accent);
    border-radius: var(--radius);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.project-status {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-radius: var(--radius);
}

.project-status.ongoing {
    background-color: var(--accent-warning);
    color: white;
}

.project-status.completed {
    background-color: var(--accent-success);
    color: white;
}

.project-status.planning {
    background-color: var(--primary-medium);
    color: white;
}

/* Section Vidéos */
.youtube-videos {
    background-color: var(--bg-section);
    padding: var(--spacing-xxl) 0;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.video-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.video-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-light);
}

.video-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-medium);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
}

.video-card:hover::before {
    transform: scaleX(1);
}

.video-thumbnail {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.05);
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background-color: var(--primary-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.3rem;
    border-radius: 50%;
    transition: var(--transition);
    z-index: 2;
}

.video-card:hover .play-button {
    transform: translate(-50%, -50%) scale(1.1);
    background-color: var(--primary-light);
}

.video-duration {
    position: absolute;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius);
    z-index: 2;
}

.video-info {
    padding: var(--spacing-lg);
}

.video-info h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.4;
}

.video-info p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
    line-height: 1.5;
}

.video-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

.video-stats span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.video-stats i {
    color: var(--primary-medium);
}

.youtube-cta {
    text-align: center;
}

.youtube-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xxl);
    background-color: #ff0000;
    color: white;
    font-weight: 700;
    transition: var(--transition);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.25);
}

.youtube-btn:hover {
    background-color: #cc0000;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 0, 0, 0.35);
}

.youtube-btn i {
    font-size: 1.2em;
}

/* Footer */
.footer {
    background-color: var(--primary-dark);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    position: relative;
    border-top: 1px solid var(--border-light);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--primary-medium);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 var(--spacing-lg);
}

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-lg);
    position: relative;
    font-size: 1rem;
    font-weight: 600;
}

.footer-section h3::after,
.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 30px;
    height: 1px;
    background-color: var(--primary-light);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    font-size: 0.9rem;
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: var(--spacing-md);
}

.footer-section ul li::before {
    content: '\2022';
    position: absolute;
    left: 0;
    color: var(--primary-light);
    font-weight: bold;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
    font-size: 0.85rem;
    text-decoration: none;
}

.footer-section ul li a:hover {
    color: var(--primary-light);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    transition: var(--transition);
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.social-links a:hover {
    background-color: var(--primary-light);
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background-color: rgba(255, 255, 255, 0.05);
    color: white;
    font-size: 0.85rem;
    transition: var(--transition);
    border-radius: var(--radius);
}

.newsletter-form input:focus {
    border-color: var(--primary-light);
    outline: none;
    background-color: rgba(255, 255, 255, 0.1);
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-form button {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--primary-light);
    color: white;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-radius: var(--radius);
    font-size: 0.8rem;
}

.newsletter-form button:hover {
    background-color: var(--primary-medium);
    transform: translateY(-1px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

.footer-bottom p {
    margin-bottom: var(--spacing-sm);
    font-weight: 400;
    font-size: 0.8rem;
}

.footer-bottom i {
    color: var(--primary-light);
    animation: heartbeat 2s ease-in-out infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Responsive Design */
@media (max-width: 968px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-container {
        max-width: 100%;
        padding: var(--spacing-md);
    }
    
    .brand-text h1 {
        font-size: 1.5rem;
    }
    
    .featured-article {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        padding: var(--spacing-lg);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .articles-categories {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }
    
    .category-btn {
        width: 100%;
        max-width: 280px;
        margin: 0 auto;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form input,
    .newsletter-form button {
        width: 100%;
    }
}

@media (max-width: 580px) {
    section {
        padding: var(--spacing-xl) 0;
    }
    
    .section-header {
        margin-bottom: var(--spacing-xl);
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .articles-grid,
    .projects-grid,
    .videos-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .article-card,
    .project-card,
    .video-card {
        margin: 0 var(--spacing-sm);
    }
    
    .brand-logo {
        height: 35px;
    }
    
    .brand-text h1 {
        font-size: 1.3rem;
    }
    
    .brand-text p {
        font-size: 0.75rem;
    }
}

/* Améliorations d'accessibilité et de performance */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states améliorés */
button:focus,
input:focus,
a:focus,
.category-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--radius);
}

/* Optimisations de performance */
.article-image img,
.featured-image img,
.video-thumbnail img {
    will-change: transform;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-light: #000000;
        --text-muted: #333333;
    }
}

/* Animations créatives */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.article-card {
    animation: fadeInUp 0.6s ease-out;
}

.article-card:nth-child(even) {
    animation: slideInLeft 0.6s ease-out;
}

.article-card:nth-child(odd) {
    animation: slideInRight 0.6s ease-out;
}

.project-card {
    animation: scaleIn 0.5s ease-out;
    animation-delay: calc(var(--index, 0) * 0.1s);
}

.video-card {
    animation: fadeInUp 0.7s ease-out;
    animation-delay: calc(var(--index, 0) * 0.15s);
}

.featured-article {
    animation: pulse 4s ease-in-out infinite;
}

/* Hover effects créatifs */
.section-header h2:hover {
    color: var(--primary-medium);
    transition: color 0.3s ease;
}

/* Effets de survol pour les icônes */
.project-icon:hover {
    animation: bounce 0.6s ease;
}

@keyframes bounce {
    0%, 20%, 60%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    80% {
        transform: translateY(-5px);
    }
}

/* ============================================================
   SECTION 1: CAROUSEL / FEATURED ARTICLES
   ============================================================ */
.featured-articles {
    background: var(--primary-bg);
    padding: 60px 0;
    margin-bottom: 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--primary-dark);
    margin-bottom: 10px;
    font-weight: 700;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.carousel-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: 20px;
}

.carousel-wrapper {
    flex: 1;
    overflow: hidden;
    border-radius: 10px;
}

.carousel-slides {
    display: flex;
    transition: transform 0.3s ease-in-out;
}

.carousel-slide {
    min-width: 100%;
    display: none;
    flex-shrink: 0;
}

.carousel-slide.active {
    display: flex;
}

.slide-content {
    display: flex;
    gap: 40px;
    align-items: stretch;
    background: white;
    border: 1px solid #e8f0f7;
    border-radius: 10px;
    overflow: hidden;
}

.slide-image {
    flex-shrink: 0;
    width: 40%;
}

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

.slide-info {
    flex: 1;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.category {
    display: inline-block;
    background: var(--primary-light);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
    width: fit-content;
}

.slide-info h3 {
    font-size: 1.8rem;
    color: var(--primary-dark);
    margin-bottom: 15px;
    line-height: 1.3;
}

.slide-info p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
}

.slide-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.slide-meta span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.read-btn {
    display: inline-block;
    background: var(--primary-medium);
    color: white;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s;
    width: fit-content;
}

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

.carousel-btn {
    background: var(--primary-medium);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #e0e0e0;
    cursor: pointer;
    transition: background 0.3s;
}

.dot.active {
    background: var(--primary-medium);
}

/* ============================================================
   SECTION 2: ARTICLES GRID
   ============================================================ */
.articles-section {
    background: white;
    padding: 60px 0;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.article-card {
    background: white;
    border: 1px solid #e8f0f7;
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s, border-color 0.3s;
}

.article-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-light);
}

.article-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

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

.article-content {
    padding: 20px;
}

.article-tag {
    display: inline-block;
    background: var(--primary-light);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.article-card h3 {
    font-size: 1.2rem;
    color: var(--primary-dark);
    margin-bottom: 10px;
    line-height: 1.4;
}

.article-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 15px;
    line-height: 1.5;
}

.article-meta {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

/* ============================================================
   SECTION 3: ABOUT & CONTACT (2 COLUMNS)
   ============================================================ */
.about-contact-section {
    background: var(--primary-bg);
    padding: 60px 0;
}

.about-contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.contact-column {
    background: white;
    padding: 40px;
    border-radius: 10px;
    border: 1px solid #e8f0f7;
}

.contact-column h2 {
    font-size: 1.8rem;
    color: var(--primary-dark);
    margin-bottom: 15px;
}

.contact-column > p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 30px;
    line-height: 1.6;
}

.contact-items {
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #f0f4f8;
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item i {
    font-size: 1.3rem;
    color: var(--primary-medium);
    width: 25px;
    text-align: center;
}

.contact-item h4 {
    font-size: 1rem;
    color: var(--primary-dark);
    margin: 0 0 5px 0;
    font-weight: 600;
}

.contact-item a,
.contact-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    text-decoration: none;
    margin: 0;
}

.contact-item a:hover {
    color: var(--primary-medium);
    text-decoration: underline;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-form input,
.contact-form textarea {
    padding: 12px 15px;
    border: 1px solid #e8f0f7;
    border-radius: 5px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--primary-dark);
    background: #f8f9fa;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-medium);
    background: white;
}

.submit-btn {
    background: var(--primary-medium);
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

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

.about-column {
    background: white;
    padding: 40px;
    border-radius: 10px;
    border: 1px solid #e8f0f7;
}

.profile-section {
    text-align: center;
}

.profile-image {
    width: 150px;
    height: 150px;
    margin: 0 auto 25px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary-light);
}

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

.about-column h2 {
    font-size: 1.8rem;
    color: var(--primary-dark);
    margin-bottom: 10px;
}

.profile-title {
    font-size: 1.1rem;
    color: var(--primary-medium);
    font-weight: 600;
    margin-bottom: 20px;
}

.profile-bio {
    text-align: left;
    margin-bottom: 30px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.profile-bio p {
    margin-bottom: 15px;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px 0;
    border-top: 1px solid #e8f0f7;
    border-bottom: 1px solid #e8f0f7;
}

.stat h3 {
    font-size: 1.8rem;
    color: var(--primary-medium);
    margin-bottom: 5px;
}

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

.social-links {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--primary-light);
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: background 0.3s;
}

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

/* ============================================================
   SECTION 4: PROJECTS
   ============================================================ */
.projects-section {
    background: white;
    padding: 60px 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background: white;
    padding: 30px;
    border: 1px solid #e8f0f7;
    border-radius: 10px;
    transition: transform 0.3s, border-color 0.3s;
    position: relative;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-light);
}

.project-icon {
    font-size: 2.5rem;
    color: var(--primary-medium);
    margin-bottom: 20px;
}

.project-card h3 {
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-bottom: 15px;
    line-height: 1.3;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.6;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tech-tag {
    display: inline-block;
    background: #e8f0f7;
    color: var(--primary-medium);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-status {
    display: inline-block;
    padding: 8px 15px;
    border-radius: 5px;
    font-size: 0.85rem;
    font-weight: 600;
}

.project-status.completed {
    background: #d4edda;
    color: #155724;
}

.project-status.ongoing {
    background: #fff3cd;
    color: #856404;
}

.project-status.planning {
    background: #d1ecf1;
    color: #0c5460;
}

/* ============================================================
   SECTION 5: VIDEOS
   ============================================================ */
.videos-section {
    background: var(--primary-bg);
    padding: 60px 0;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.video-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid #e8f0f7;
    transition: transform 0.3s;
}

.video-card:hover {
    transform: translateY(-5px);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background: var(--primary-dark);
    overflow: hidden;
}

.video-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(0, 61, 106, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    transition: background 0.3s;
}

.video-card:hover .play-button {
    background: var(--primary-medium);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 4px 8px;
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: 600;
}

.video-info {
    padding: 20px;
}

.video-info h4 {
    font-size: 1.1rem;
    color: var(--primary-dark);
    margin-bottom: 10px;
    line-height: 1.4;
}

.video-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 15px;
    line-height: 1.5;
}

.video-stats {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.video-stats span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.youtube-cta {
    text-align: center;
    margin-top: 40px;
}

.youtube-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #e74c3c;
    color: white;
    padding: 15px 40px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: background 0.3s;
}

.youtube-btn:hover {
    background: #c0392b;
}

/* ============================================================
   RESPONSIVE DESIGN
   ============================================================ */
@media (max-width: 968px) {
    .slide-content {
        flex-direction: column;
    }

    .slide-image {
        width: 100%;
        height: 250px;
    }

    .about-contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .carousel-container {
        flex-direction: column;
    }

    .carousel-btn {
        width: 45px;
        height: 45px;
    }

    .profile-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .articles-grid,
    .projects-grid,
    .videos-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 580px) {
    .section-header h2 {
        font-size: 2rem;
    }

    .slide-info {
        padding: 20px;
    }

    .slide-info h3 {
        font-size: 1.4rem;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

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

    .contact-column,
    .about-column {
        padding: 20px;
    }

    .profile-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .articles-grid,
    .projects-grid,
    .videos-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .social-links {
        gap: 10px;
    }

    .social-links a {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }
}

/* Styles d'impression */
@media print {
    .header,
    .footer,
    .hamburger,
    .category-btn,
    .read-more-btn,
    .youtube-btn {
        display: none !important;
    }
    
    * {
        background: none !important;
        color: black !important;
        border: 1px solid black !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
        color: black;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
    
    .article-card,
    .project-card,
    .video-card {
        break-inside: avoid;
    }
}