:root {
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Roboto', sans-serif;
    --transition-speed: 0.4s;
}

/* --- Thème Clair (défaut) --- */
[data-theme='light'] {
    --primary-color: #0D47A1; /* Bleu foncé */
    --secondary-color: #FDB813; /* Jaune/Or */
    --background-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-color: #2c3e50;
    --heading-color: #0D47A1;
    --subtle-text-color: #6c757d;
    --shadow-color: rgba(0, 0, 0, 0.08);
}

/* --- Thème Sombre --- */
[data-theme='dark'] {
    --primary-color: #42a5f5; /* Bleu clair */
    --secondary-color: #FDB813; /* Jaune/Or */
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --text-color: #e0e0e0;
    --heading-color: #ffffff;
    --subtle-text-color: #adb5bd;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

/* --- Réinitialisation et styles de base --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: var(--font-body); background-color: var(--background-color); color: var(--text-color); line-height: 1.7; transition: background-color var(--transition-speed), color var(--transition-speed); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 600; color: var(--heading-color); transition: color var(--transition-speed); }
h2 { font-size: 2.5rem; text-align: center; margin-bottom: 1rem; }
.section-subtitle { text-align: center; max-width: 700px; margin: 0 auto 3rem auto; font-size: 1.1rem; color: var(--subtle-text-color); }
.content-section { padding: 80px 0; }
.alternate-bg { background-color: var(--surface-color); }

#progress-bar { position: fixed; top: 0; left: 0; height: 5px; background: linear-gradient(90deg, var(--primary-color), var(--secondary-color)); width: 0%; z-index: 1000; transition: width 0.1s linear; }

header { 
    background: linear-gradient(rgba(10, 25, 47, 0.7), rgba(10, 25, 47, 0.7)), url('https://images.unsplash.com/photo-1521791136064-7986c2920216?q=80&w=2938&auto=format&fit=crop') no-repeat center center/cover; 
    background-attachment: fixed; 
    min-height: 80vh; 
    display: flex; 
    flex-direction: column; 
    padding-top: 80px; /* Ajout d'un padding pour l'espace de la nav fixe */
    box-sizing: border-box;
}

#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 5%;
    z-index: 900;
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
    background-color: var(--surface-color);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.logo-link { text-decoration: none; display: flex; align-items: center; gap: 15px; }
.logo-img { height: 40px; }
.logo-text { font-family: var(--font-heading); font-size: 1.6rem; font-weight: 700; color: var(--heading-color); }

.hero-content { flex-grow: 1; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 20px; color: #fff; }
.hero-content h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700; text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5); max-width: 900px; line-height: 1.2; }
.hero-content p { font-size: 1.3rem; margin: 1.5rem 0 2.5rem 0; max-width: 700px; }

.about-container { display: flex; align-items: center; gap: 40px; }
.about-text, .about-image { flex: 1; }
.about-image img { width: 100%; border-radius: 10px; box-shadow: 0 15px 30px var(--shadow-color); }

.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; }
.service-card { background: var(--surface-color); padding: 30px; text-align: center; border: 1px solid transparent; border-radius: 10px; box-shadow: 0 5px 15px var(--shadow-color); transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease; }
[data-theme='light'] .service-card { background: var(--background-color); }
.service-card:hover { transform: translateY(-10px); box-shadow: 0 15px 30px var(--shadow-color); border-color: var(--secondary-color); }
.service-card i { font-size: 2.5rem; color: var(--secondary-color); margin-bottom: 1rem; }
.service-card h4 { font-size: 1.3rem; margin-bottom: 0.5rem; }

.method-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; }
.method-step { padding: 2rem; text-align: center; border-radius: 10px; border: 1px solid var(--shadow-color); }
.method-number { width: 50px; height: 50px; border-radius: 50%; background-color: var(--primary-color); color: #fff; display: inline-flex; justify-content: center; align-items: center; font-size: 1.5rem; font-weight: 700; margin-bottom: 1rem; }
.method-step h4 { margin-bottom: 0.5rem; }

#stats { background: var(--primary-color); color: #fff; padding: 60px 0; }
#stats h3 { color: var(--secondary-color); font-size: 3rem; margin-bottom: 0.2rem; }
.stats-container { display: flex; justify-content: space-around; gap: 20px; text-align: center; flex-wrap: wrap; }

.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; justify-content: center; }
.team-member-card { background-color: var(--surface-color); padding: 2rem; border-radius: 10px; text-align: center; box-shadow: 0 5px 15px var(--shadow-color); }
.team-photo { width: 150px; height: 150px; border-radius: 50%; object-fit: cover; margin-bottom: 1.5rem; border: 4px solid var(--secondary-color); box-shadow: 0 5px 15px var(--shadow-color); }
.team-member-card p { color: var(--subtle-text-color); }

.metiers-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; }
.metier-card { background: var(--surface-color); padding: 25px; border-left: 4px solid var(--secondary-color); border-radius: 5px; box-shadow: 0 5px 15px var(--shadow-color); }
.metier-card h4 { margin-bottom: 0.5rem; }

.gallery-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 25px; justify-content: center; }
.video-card { background-color: var(--surface-color); border-radius: 10px; box-shadow: 0 5px 15px var(--shadow-color); overflow: hidden; transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease; }
.video-card:hover { transform: scale(1.03); box-shadow: 0 15px 30px var(--shadow-color); }
.video-card video { width: 100%; height: 100%; object-fit: cover; display: block; }

.blog-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; }
.blog-card { background: var(--surface-color); border-radius: 10px; box-shadow: 0 5px 15px var(--shadow-color); overflow: hidden; display: flex; flex-direction: column; }
.blog-card h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.blog-card h4 { color: var(--subtle-text-color); font-size: 0.9rem; text-transform: uppercase; }
.blog-card p { padding: 0 25px; flex-grow: 1; }
.blog-card .read-more-btn { display: block; padding: 15px 25px; background: var(--background-color); text-decoration: none; color: var(--primary-color); font-weight: 600; transition: background-color var(--transition-speed); margin-top: 1rem; }
.blog-card .read-more-btn:hover { background: var(--secondary-color); color: #121212; }
.blog-card h3, .blog-card h4 { padding: 0 25px; }
.blog-card h4 { padding-top: 25px; }
.blog-card h3 { padding-bottom: 10px; }

.testimonial-card { background: var(--surface-color); padding: 25px; border-left: 5px solid var(--secondary-color); border-radius: 5px; max-width: 900px; margin: auto; box-shadow: 0 5px 15px var(--shadow-color); }

.cta-section { background: var(--primary-color); color: #fff; padding: 60px 0; text-align: center; }
.cta-button { background: var(--secondary-color); color: #121212; padding: 12px 30px; border-radius: 50px; text-decoration: none; font-weight: 600; transition: transform 0.3s ease, box-shadow 0.3s ease; display: inline-block; border: none; cursor: pointer; font-size: 1rem; }
.cta-button:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2); }

.contact-form { margin-top: 1.5rem; max-width: 600px; margin-left: auto; margin-right: auto; }
.contact-form .form-row { display: flex; gap: 1rem; }
.contact-form .form-group { flex: 1; margin-bottom: 1rem; }
.contact-form input, .contact-form textarea { width: 100%; padding: 12px; border-radius: 5px; border: 1px solid #ccc; font-family: var(--font-body); font-size: 1rem; }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--primary-color); outline: none; }
#contact .contact-form input, #contact .contact-form textarea { background-color: rgba(255,255,255,0.9); color: #333; }


footer { background: #2c3e50; color: #ecf0f1; padding-top: 40px; }
.footer-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; padding-bottom: 30px; }
.footer-section h4 { color: #fff; margin-bottom: 1rem; }
.footer-section ul { list-style: none; }
.footer-section a { color: #bdc3c7; text-decoration: none; line-height: 2; transition: color var(--transition-speed); }
.footer-section a:hover { color: var(--secondary-color); }
.footer-social { margin-top: 1rem; }
.footer-social a { color: #ecf0f1; margin-right: 15px; font-size: 1.2rem; transition: color var(--transition-speed); }
.footer-social a:hover { color: var(--secondary-color); }
.footer-bottom { border-top: 1px solid #4a6278; text-align: center; padding: 20px 0; }

.animate-on-scroll { opacity: 0; transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.animate-on-scroll.fade-in { transform: translateY(30px); }
.animate-on-scroll.slide-in-left { transform: translateX(-50px); }
.animate-on-scroll.slide-in-right { transform: translateX(50px); }
.animate-on-scroll.is-visible { opacity: 1; transform: translateY(0) translateX(0); }

.popup-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); z-index: 1000; display: flex; justify-content: center; align-items: center; opacity: 0; visibility: hidden; transition: opacity 0.4s ease, visibility 0.4s ease; }
.popup-overlay.visible { opacity: 1; visibility: visible; }
.popup-container { background-color: var(--surface-color); padding: 30px 40px; border-radius: 10px; max-width: 600px; width: 90%; text-align: center; position: relative; transform: scale(0.9); transition: transform 0.4s ease; }
.popup-overlay.visible .popup-container { transform: scale(1); }
.popup-close-btn { position: absolute; top: 10px; right: 15px; background: none; border: none; font-size: 2rem; color: var(--subtle-text-color); cursor: pointer; }
.popup-container h3 { margin-bottom: 1rem; }
.popup-container ul { list-style: none; text-align: left; margin-top: 1rem; }
.popup-container li { margin-bottom: 0.5rem; }
.article-popup { max-width: 800px; text-align: left; }
.article-popup h3 { text-align: center; }
.article-popup-content p { margin-bottom: 1rem; }

.nav-container { display: flex; align-items: center; gap: 25px; }
.nav-links-desktop { display: flex; list-style: none; gap: 25px; }
.nav-links-desktop a { color: var(--text-color); text-decoration: none; font-weight: 600; position: relative; padding-bottom: 5px; transition: color var(--transition-speed); }
.nav-links-desktop a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background-color: var(--secondary-color); transition: width var(--transition-speed) ease; }
.nav-links-desktop a:hover::after, .nav-links-desktop a.active::after { width: 100%; }
.theme-switcher-desktop { display: flex; align-items: center; gap: 10px; color: var(--text-color); transition: color var(--transition-speed); }

.mobile-menu-toggle { display: none; }
.mobile-nav { 
    position: fixed; 
    top: 0; 
    right: -100%; 
    width: 70%; 
    max-width: 320px; 
    height: 100vh; 
    background-color: var(--surface-color); 
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2); 
    z-index: 950; 
    display: flex; 
    flex-direction: column; 
    padding: 60px 20px 20px; 
    transition: right 0.4s cubic-bezier(0.77, 0, 0.175, 1); 
}
.mobile-nav.is-open { right: 0; }
.mobile-nav .close-btn { position: absolute; top: 15px; right: 25px; background: none; border: none; font-size: 2.5rem; color: var(--text-color); cursor: pointer; }
.mobile-nav-links { list-style: none; padding: 0; margin-top: 2rem; }
.mobile-nav-links a { display: block; text-decoration: none; color: var(--text-color); font-size: 1.3rem; font-weight: 600; padding: 15px 0; border-bottom: 1px solid var(--shadow-color); }
.theme-switcher-mobile { margin-top: auto; padding-top: 20px; border-top: 1px solid var(--shadow-color); color: var(--text-color); }
.theme-switcher-mobile span { font-weight: 600; font-size: 1.1rem; }
.theme-switcher-mobile > div { display: flex; align-items: center; gap: 10px; margin-top: 10px; }


.switch { position: relative; display: inline-block; width: 50px; height: 26px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #ccc; transition: .4s; }
.slider:before { position: absolute; content: ""; height: 20px; width: 20px; left: 3px; bottom: 3px; background-color: white; transition: .4s; }
input:checked+.slider { background-color: var(--primary-color); }
input:checked+.slider:before { transform: translateX(24px); }
.slider.round { border-radius: 34px; }
.slider.round:before { border-radius: 50%; }

@media (max-width: 992px) {
    .nav-container { display: none; }
    .mobile-menu-toggle { display: block; background: none; border: none; color: var(--text-color); font-size: 1.8rem; cursor: pointer; z-index: 1001; }
    .about-container { flex-direction: column; }
    .about-image { order: -1; }
}

@media (max-width: 768px) {
    h2 { font-size: 2rem; }
    .content-section { padding: 60px 0; }
    .stats-container { flex-direction: column; gap: 40px; }
    .footer-container { grid-template-columns: 1fr; }
    .contact-form .form-row { flex-direction: column; gap: 0; }
    .logo-text { display: none; }
}

/* --- Styles pour la galerie (Vidéos et Photos) --- */

/* Style commun pour les cartes */
.video-card, .photo-card {
    background-color: var(--surface-color);
    border-radius: 10px;
    box-shadow: 0 5px 15px var(--shadow-color);
    overflow: hidden;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    aspect-ratio: 16 / 9; /* Maintient un format 16:9 */
}

/* Effet de survol commun */
.video-card:hover, .photo-card:hover {
    transform: scale(1.03);
    box-shadow: 0 15px 30px var(--shadow-color);
}

/* Style commun pour le contenu média (vidéo ou image) */
.video-card video, .photo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}