/* =========================================
   1. VARIABLES & RESET
   ========================================= */
:root {
    /* Palette Sombre */
    --bg-body: #050505;       /* Noir profond */
    --bg-card: #121212;       /* Gris très sombre pour les cartes */
    --bg-light: #1a1a1a;      /* Gris anthracite pour les sections alternées */
    
    /* Couleurs Accent */
    --primary-gold: #c5a059;  /* Or - Luxe, Succès */
    --primary-blue: #2a4066;  /* Bleu nuit éclairci */
    
    /* Textes */
    --text-main: #ffffff;     /* Blanc pur */
    --text-muted: #b0b0b0;    /* Gris clair */
    
    /* UI Elements */
    --border-color: #333333;
    --shadow: 0 10px 30px rgba(0,0,0,0.5);
    
    --spacing-section: 80px;
    --transition: all 0.3s ease;
}

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

/* FIX: Empêche le débordement horizontal sur mobile */
html, body {
    width: 100%;
    overflow-x: hidden; 
    position: relative;
}

body {
    font-family: 'Open Sans', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-muted);
    line-height: 1.6;
}

h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 1rem;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }

/* =========================================
   2. UTILITIES & COMPONENTS
   ========================================= */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

/* Gradient Doré pour les textes clés */
.text-gradient {
    background: linear-gradient(135deg, #fff 20%, var(--primary-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Sections Backgrounds */
.bg-light { background-color: var(--bg-light); } 
.bg-dark { background-color: #000000; border-top: 1px solid var(--border-color); }
.text-white { color: var(--text-main); }

.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.section { padding: var(--spacing-section) 0; }

.section-header { margin-bottom: 60px; max-width: 700px; margin-left: auto; margin-right: auto; }
.section-header h2 { color: var(--text-main); font-size: 2.2rem; text-align: center;}
.section-header p { color: var(--text-muted); }
.divider { width: 60px; height: 3px; background: var(--primary-gold); margin: 20px auto; }
.section-subtitle {
    color: var(--primary-gold);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
}

/* --- BUTTONS --- */
.btn-cta {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-gold), #aa853c);
    color: #000;
    box-shadow: 0 4px 15px rgba(197, 160, 89, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(45deg, #e6c57d, #c5a059);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(197, 160, 89, 0.5);
}

.btn-outline {
    border-color: var(--primary-gold);
    color: var(--primary-gold);
    background: transparent;
}

.btn-outline:hover {
    background-color: var(--primary-gold);
    color: #000;
}

.btn-gold {
    background-color: var(--primary-gold);
    color: #000;
}

.btn-link { color: var(--primary-gold); font-weight: 600; border-bottom: 1px solid transparent; }
.btn-link:hover { border-bottom-color: var(--primary-gold); }

/* =========================================
   3. HEADER
   ========================================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(5, 5, 5, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    height: 100%;
    padding: 5px 0;
}

.logo img {
    height: 65px;
    width: auto;
    object-fit: contain;
    display: block;
}

.nav-menu ul {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-main);
    opacity: 0.8;
}

.nav-link:hover { color: var(--primary-gold); opacity: 1; }
.btn-nav { font-size: 0.8rem; padding: 10px 25px; }

.hamburger { display: none; cursor: pointer; font-size: 1.5rem; color: var(--text-main); }

/* =========================================
   4. HERO SECTION
   ========================================= */
.hero {
    padding: 180px 0 100px;
    background: radial-gradient(circle at top right, #1a1a1a 0%, #000000 60%);
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.hero-container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-subtitle {
    display: block;
    font-weight: 600;
    color: var(--primary-gold);
    margin-bottom: 15px;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 25px;
    color: var(--text-main);
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin: 40px 0;
}

.hero-badges {
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.hero-badges i { color: var(--primary-gold); margin-right: 5px; }

/* Video Wrapper */
.video-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    width: 100%;
    aspect-ratio: 16 / 9; 
    box-shadow: 0 0 40px rgba(197, 160, 89, 0.1);
    border: 1px solid var(--border-color);
    background: #000;
    cursor: pointer;
}

.video-wrapper img.video-poster {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: opacity 0.3s;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-gold);
    font-size: 1.5rem;
    z-index: 10;
    pointer-events: none;
    transition: all 0.3s ease;
}

.video-wrapper:hover .play-button {
    background: var(--primary-gold);
    color: #000;
    transform: translate(-50%, -50%) scale(1.1);
}

/* =========================================
   5. CHALLENGES SECTION (Optimisé Premium)
   ========================================= */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.challenge-card {
    background: var(--bg-card);
    padding: 40px 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-align: center; /* Centré pour le look Premium */
}

.challenge-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-gold);
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

/* Style Icônes Premium (Doré + Centré) */
.challenge-card i {
    font-size: 3.5rem;
    margin-bottom: 25px;
    display: inline-block;
    background: linear-gradient(135deg, #f5dba3 0%, #c5a059 50%, #8c6e30 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 10px rgba(197, 160, 89, 0.3));
    transition: transform 0.3s ease;
}

.challenge-card:hover i {
    transform: scale(1.1);
    filter: drop-shadow(0 0 20px rgba(197, 160, 89, 0.5));
}

.challenge-card h3 { 
    color: var(--text-main); 
    margin-top: 5px; 
    font-size: 1.3rem; 
}
.challenge-card p { 
    color: var(--text-muted); 
    margin-top: 15px; 
}

/* =========================================
   6. EXPERTISES SECTION (Parallaxe)
   ========================================= */
.expertises {
    position: relative;
    background-color: #000;
    background-image: url('https://images.unsplash.com/photo-1497366216548-37526070297c?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed; /* Parallaxe PC */
    padding: 100px 0;
}

.section-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 1;
}

.relative-content {
    position: relative;
    z-index: 2;
}

.expertise-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    padding: 40px 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    text-align: center;
    transition: all 0.4s ease;
}

.expertise-card:hover {
    transform: translateY(-10px);
    background: rgba(20, 20, 20, 0.8);
    border-color: var(--primary-gold);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6);
}

.icon-large-wrapper {
    margin-bottom: 25px;
    display: inline-block;
}

.icon-large-wrapper i {
    font-size: 4rem;
    background: linear-gradient(135deg, #f5dba3 0%, #c5a059 50%, #8c6e30 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 15px rgba(197, 160, 89, 0.3));
    transition: transform 0.4s ease;
}

.expertise-card:hover .icon-large-wrapper i {
    transform: scale(1.1) rotate(5deg);
    filter: drop-shadow(0 0 25px rgba(197, 160, 89, 0.6));
}

.expertise-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.expertise-card p { font-size: 0.95rem; color: #ccc; line-height: 1.7; }

.expertise-card h3::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: var(--primary-gold);
    margin: 15px auto 0;
    transition: width 0.3s ease;
}

.expertise-card:hover h3::after { width: 80px; }

/* =========================================
   7. APPROACH SECTION (3 Piliers)
   ========================================= */
.approach {
    position: relative;
    background: radial-gradient(circle at center, #1a1a1a 0%, #000 100%);
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.approach-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid #333;
    padding: 40px 25px;
    border-radius: 4px;
    position: relative;
    transition: all 0.4s ease;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.approach-card:hover {
    border-color: var(--primary-gold);
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(197, 160, 89, 0.15);
    background: #0a0a0a;
}

.card-step {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.05);
    font-family: 'Montserrat', sans-serif;
    transition: 0.3s;
}

.approach-card:hover .card-step { color: rgba(197, 160, 89, 0.2); }

.icon-pillar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 1px solid var(--primary-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    font-size: 2rem;
    color: var(--primary-gold);
    box-shadow: 0 0 15px rgba(197, 160, 89, 0.1);
    background: #000;
}

.approach-card:hover .icon-pillar {
    background: var(--primary-gold);
    color: #000;
    box-shadow: 0 0 25px rgba(197, 160, 89, 0.4);
}

.approach-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.mantra {
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    color: var(--primary-gold);
    margin-bottom: 20px;
    font-style: italic;
    border-bottom: 1px solid #333;
    padding-bottom: 15px;
    width: 100%;
}

.description {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    min-height: 80px;
}

.list-check li {
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
    color: var(--text-muted);
}

.list-check.small li {
    font-size: 0.9rem;
    margin-bottom: 8px;
    text-align: left;
    padding-left: 25px;
}

.list-check li::before {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: var(--primary-gold);
    position: absolute;
    left: 0;
}

/* =========================================
   8. ABOUT SECTION
   ========================================= */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    box-shadow: -20px -20px 0 #222;
}

.about-text h2 { font-size: 2.5rem; margin-top: 10px; }
.lead { font-size: 1.2rem; color: #fff; margin-bottom: 1.5rem; }

.credentials {
    display: flex;
    gap: 30px;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.credential-item { color: var(--text-muted); }
.credential-item strong {
    display: block;
    font-size: 1.2rem;
    color: var(--primary-gold);
}

/* =========================================
   9. FORMATIONS & CATALOGUE
   ========================================= */
.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.formation-item {
    background: var(--bg-light);
    padding: 30px 20px;
    text-align: center;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.formation-item:hover { 
    background: var(--bg-card); 
    border-color: var(--primary-gold);
    transform: translateY(-5px);
}

.formation-item h4 { color: #fff; margin-top: 15px; }
.formation-item p { font-size: 0.9rem; }
.formation-item i { font-size: 2rem; color: var(--primary-gold); }

/* --- CTA CATALOGUE PREMIUM --- */
.catalogue-cta-container {
    margin-top: 60px;
    display: flex;
    justify-content: center;
}

.catalogue-box {
    display: flex;
    align-items: center;
    background: linear-gradient(145deg, #151515, #0a0a0a);
    border: 1px solid rgba(197, 160, 89, 0.3);
    padding: 30px 40px;
    border-radius: 15px;
    max-width: 900px;
    width: 100%;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.catalogue-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(197, 160, 89, 0.1), transparent);
    transition: 0.5s;
}

.catalogue-box:hover::before { left: 100%; }

.catalogue-box:hover {
    border-color: var(--primary-gold);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(197, 160, 89, 0.15);
}

.catalogue-visual {
    position: relative;
    margin-right: 30px;
    flex-shrink: 0;
}

.catalogue-visual i {
    font-size: 4rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.catalogue-box:hover .catalogue-visual i { color: #fff; }

.pdf-label {
    position: absolute;
    bottom: -5px;
    right: -10px;
    background: var(--primary-gold);
    color: #000;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 4px;
}

.catalogue-content {
    flex-grow: 1;
    border-left: 1px solid #333;
    padding-left: 30px;
    margin-right: 30px;
}

.catalogue-content h3 { color: var(--primary-gold); margin-bottom: 5px; font-size: 1.5rem; }
.catalogue-content p { color: #ccc; font-size: 0.95rem; margin: 0; }

.btn-download {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 35px;
    font-size: 1rem;
    white-space: nowrap;
    animation: pulse-gold 2s infinite;
}

.btn-download i { font-size: 1.2rem; }

@keyframes pulse-gold {
    0% { box-shadow: 0 0 0 0 rgba(197, 160, 89, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(197, 160, 89, 0); }
    100% { box-shadow: 0 0 0 0 rgba(197, 160, 89, 0); }
}

/* =========================================
   10. CONTACT SECTION
   ========================================= */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 0;
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.contact-info {
    background: #0a0a0a;
    padding: 50px;
    border-right: 1px solid var(--border-color);
}

.contact-info h2 { color: var(--primary-gold); }
.contact-details {padding-top:30px;}
.contact-details li { margin-bottom: 20px; display: flex; align-items: center; gap: 15px; color: #fff; font-size:1.1rem; }
.contact-details i { color: var(--primary-gold); width: 20px; text-align: center; }

.social-links {font-size:2.5rem;}

.contact-form-container { padding: 50px; background: var(--bg-card); }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--text-main); }

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px;
    background-color: #000;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: #fff;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus { 
    border-color: var(--primary-gold); 
    outline: none; 
    background-color: #080808;
}

/* --- CUSTOM SELECT (Menu Déroulant Premium) --- */

/* 1. On cible le select spécifique du formulaire */
.form-group select {
    /* Supprime le style moche par défaut du navigateur (flèche grise, fond blanc...) */
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;

    /* On applique votre style Dark */
    background-color: #000;
    color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    width: 100%;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    
    /* 2. On ajoute une flèche DORÉE personnalisée via une image encodée */
    /* C'est un SVG de chevron vers le bas, couleur #c5a059 */
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23c5a059' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    
    background-repeat: no-repeat;
    background-position: right 15px center; /* Position de la flèche à droite */
    background-size: 16px; /* Taille de la flèche */
    padding-right: 40px; /* Espace à droite pour ne pas que le texte passe sur la flèche */
    transition: var(--transition);
}

/* 3. Interaction au clic et survol */
.form-group select:focus {
    border-color: var(--primary-gold);
    outline: none;
    box-shadow: 0 0 10px rgba(197, 160, 89, 0.2);
}

.form-group select:hover {
    border-color: #555;
}

/* 4. Style de la liste déroulante (les options) */
/* Note : Le style des options est limité par les navigateurs, mais on peut forcer le fond noir */
.form-group select option {
    background-color: #111; /* Fond noir */
    color: #fff;            /* Texte blanc */
    padding: 10px;
}

.btn-submit { width: 100%; border: none; background: var(--primary-gold); color: #000; }
.btn-submit:hover { background: #d4af6a; }

/* =========================================
   11. FOOTER
   ========================================= */
footer { 
    background: #000; 
    border-top: 1px solid var(--border-color);
    padding: 60px 0 20px; 
    color: var(--text-muted);
}

.footer-content { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-bottom: 40px; }
.footer-col h4 { color: #fff; margin-bottom: 20px; letter-spacing: 1px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a:hover { color: var(--primary-gold); }
.footer-bottom { border-top: 1px solid var(--border-color); padding-top: 20px; font-size: 0.8rem; }

/* =========================================
   12. VIDEO MODAL (Lightbox)
   ========================================= */
.video-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-modal.show {
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
}

.modal-content {
    position: relative;
    width: 80%;
    max-width: 1000px;
    aspect-ratio: 16 / 9;
    box-shadow: 0 0 50px rgba(197, 160, 89, 0.2);
    animation: zoomIn 0.3s ease-out;
}

.modal-content video {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    display: block;
    border: 1px solid #333;
}

.close-modal {
    position: absolute;
    top: -40px;
    right: -10px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
    line-height: 1;
}

.close-modal:hover { color: var(--primary-gold); transform: scale(1.1); }

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

/* =========================================
   13. RESPONSIVE (MEDIA QUERIES)
   ========================================= */

/* --- TABLETTE (max 1024px) --- */
@media (max-width: 1024px) {
    .hero-container, .grid-2, .contact-wrapper { grid-template-columns: 1fr; gap: 40px; }
    .hero { text-align: center; background: var(--bg-body); padding-top: 120px; }
    .hero-container { flex-direction: column; }
    .hero-buttons, .hero-badges { justify-content: center; }
    
    .approach-grid, .grid-3 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: 1fr 1fr; }
    
    .contact-info { border-right: none; border-bottom: 1px solid var(--border-color); }
    .contact-info h2 {font-size: 1.3rem; }
    /* Fix Hero Badges sur Tablette */
    .hero-badges { flex-direction: column; gap: 10px; }
}

/* --- MOBILE (max 768px) --- */
@media (max-width: 768px) {
    /* Menu Navigation Mobile */
    /* Menu Navigation Mobile (Corrigé) */
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100vw;
        width: 100vw;
        height: calc(100vh - 70px);
        background: #000;
        display: flex; /* Assurez-vous que display: flex est bien là */
        flex-direction: column;
        align-items: center;
        
        /* CORRECTION : On ne centre plus, on démarre d'en haut */
        justify-content: flex-start; 
        
        /* CORRECTION : On pousse le contenu vers le bas */
        padding-top: 80px; 
        
        transition: 0.4s;
        border-top: 1px solid var(--border-color);
        overflow-y: auto; /* Permet de scroller si le menu est trop long sur petit écran */
    }
    
    .nav-menu.active { right: 0; }
    .nav-menu ul { flex-direction: column; }
    .nav-menu li a {font-size:1.5rem;}
    .hamburger { display: block; }
    
    /* Hero Optimisations */
    .hero-content h1 {
        font-size: 2rem; /* Titre réduit */
        line-height: 1.2;
        margin-bottom: 20px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        gap: 15px;
    }
    
    .hero-buttons .btn-cta {
        width: 100%;
        padding: 10px 20px;
        font-size: 0.85rem;
        height: auto;
    }

    /* Grilles et Contenu */
    .grid-4 { grid-template-columns: 1fr; }
    .credentials { flex-direction: column; gap: 10px; }
    
    /* Challenges Grid (Icônes centrées) */
    .grid-3 { grid-template-columns: 1fr; }
    
    /* Expertises (Désactive le parallaxe pour éviter les bugs) */
    .expertises { background-attachment: scroll !important; }

    /* Catalogue Premium Box Mobile */
    .catalogue-box {
        flex-direction: column;
        text-align: center;
        padding: 30px 20px;
    }
    .catalogue-visual { margin: 0 0 20px 0; }
    .catalogue-content {
        border-left: none;
        border-bottom: 1px solid #333;
        padding-left: 0;
        padding-bottom: 20px;
        margin-right: 0;
        margin-bottom: 20px;
    }
    .catalogue-action { width: 100%; }
    .btn-download { width: 100%; justify-content: center; }
    
    /* Modal Video */
    .modal-content { width: 95%; }
    .close-modal { top: -50px; right: 0; }
}