/* ===== VARIABLES CSS ===== */
:root {
    /* Couleurs de la charte graphique EBPC87 */
    --color-primary: #1a1a1a;      /* Gris foncé */
    --color-secondary: #1e3a8a;    /* Bleu foncé */
    --color-accent: #dc2626;       /* Rouge foncé */
    --color-light: #f8fafc;        /* Blanc cassé */
    --color-dark: #0f172a;         /* Noir profond */
    --color-gray: #64748b;         /* Gris moyen */
    --color-gray-light: #e2e8f0;   /* Gris clair */
    
    /* Typographie */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Bordures */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Ombres */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* ===== RESET ET BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-primary);
    background-color: var(--color-light);
}

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

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

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
    border-radius: 2px;
}

/* ===== BOUTONS ===== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-primary);
    color: white;
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: transparent;
    color: var(--color-primary);
}

.btn-emergency {
    background: var(--color-accent);
    color: white;
    font-size: 1.1rem;
    padding: 15px 30px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.nav-logo .logo {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--color-primary);
    margin: 3px 0;
    transition: var(--transition);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 2;
}

.hero-container {
    position: relative;
    z-index: 3;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    text-align: center;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    color: white;
    margin-bottom: var(--spacing-sm);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: white;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.hero-description {
    font-size: 1.1rem;
    color: white;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

/* Styles supprimés car la vidéo remplace l'image du logo */

/* ===== SERVICES SECTION ===== */
.services {
    padding: var(--spacing-xl) 0;
    background: white;
}

.actualites {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-light) 0%, #e2e8f0 100%);
}

.actualites-card {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-light);
    padding: var(--spacing-lg);
    overflow: hidden;
}

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

.actualites-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(30, 58, 138, 0.10);
    color: var(--color-secondary);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.actualites-title {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.actualites-text {
    color: var(--color-gray);
    font-size: 1.05rem;
    margin-bottom: var(--spacing-md);
}

.actualites-quote {
    margin: 0 0 var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-left: 4px solid var(--color-secondary);
    background: var(--color-light);
    border-radius: var(--border-radius);
    color: var(--color-primary);
    font-weight: 600;
}

.actualites-quote p {
    margin: 0 0 var(--spacing-sm);
    font-weight: 500;
    color: var(--color-primary);
}

.actualites-quote p:last-child {
    margin-bottom: 0;
}

.actualites-quote-question {
    font-weight: 800;
    color: var(--color-secondary);
}

.actualites-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.actualites-link {
    white-space: nowrap;
}

.actualites-meta {
    color: var(--color-gray);
    font-size: 0.95rem;
    margin: 0;
}

.actualites-meta a {
    color: var(--color-secondary);
    text-decoration: none;
    font-weight: 600;
}

.actualites-meta a:hover {
    text-decoration: underline;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    justify-items: center;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.service-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--color-gray-light);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-secondary);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-gray);
    line-height: 1.6;
}

/* ===== ÉTUDES & MODÉLISATION 3D SECTION ===== */
.modelisation {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-light) 0%, #e2e8f0 100%);
}

/* Services d'études */
.services-studies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.study-service {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--color-gray-light);
}

.study-service:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-secondary);
}

.study-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.study-service h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.study-service h4 {
    font-size: 1.1rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.study-service p {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.study-service ul {
    list-style: none;
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.study-service li {
    padding: var(--spacing-xs) 0;
    color: var(--color-gray);
    position: relative;
    padding-left: var(--spacing-md);
}

.study-service li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

/* Section modélisation 3D */
.modelisation-section {
    margin-top: var(--spacing-xl);
}

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

.modelisation-header h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

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

.modelisation-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.modelisation-text h4 {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.modelisation-text p {
    font-size: 1rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

.modelisation-text ul {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.modelisation-text li {
    padding: var(--spacing-xs) 0;
    color: var(--color-gray);
    position: relative;
    padding-left: var(--spacing-md);
}

.modelisation-text li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

.modelisation-applications {
    margin-bottom: var(--spacing-lg);
}

.modelisation-applications h5 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.applications-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.application-tag {
    background: var(--color-secondary);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.modelisation-gallery {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    width: 100%;
    max-width: 800px;
}

.gallery-item {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    aspect-ratio: 4/3;
    transform: translateY(-5px);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
    transform: scale(1.05);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: var(--spacing-md);
    transform: translateY(0);
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-overlay h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.gallery-overlay p {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ===== DÉPANNAGE SECTION ===== */
.depannage {
    padding: var(--spacing-xl) 0;
    background: var(--color-primary);
    color: white;
}

.depannage .section-title {
    color: white;
}

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

.depannage-info h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.depannage-info p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.depannage-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
}

.feature-icon {
    font-size: 1.5rem;
}

/* ===== CONTACT SECTION ===== */
.contact {
    padding: var(--spacing-xl) 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-info h3 {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    align-items: flex-start;
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--color-secondary);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-item a {
    color: var(--color-secondary);
    text-decoration: none;
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-form {
    background: var(--color-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-form h3 {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--color-gray-light);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--color-gray);
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-top: 2px;
}

/* ===== SECTION PARTENAIRES ===== */
.partenaires {
    padding: var(--spacing-xl) 0;
    background: white;
}

.partenaires-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.partenaires-container {
    position: relative;
    display: flex;
    align-items: center;
    margin-top: var(--spacing-lg);
}

.partenaires-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background: var(--color-secondary);
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.partenaires-nav-btn:hover {
    background: var(--color-accent);
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--shadow-lg);
}

.partenaires-nav-btn:disabled {
    background: var(--color-gray);
    cursor: not-allowed;
    transform: translateY(-50%) scale(1);
    box-shadow: var(--shadow-sm);
}

.partenaires-nav-prev {
    left: -25px;
}

.partenaires-nav-next {
    right: -25px;
}

.partenaires-grid {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: hidden;
    scroll-behavior: smooth;
    padding: var(--spacing-sm) 0;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
    width: 100%;
}

.partenaires-grid::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}

.partenaires-indicators {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.partenaires-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-gray-light);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.partenaires-indicator.active {
    background: var(--color-secondary);
    transform: scale(1.2);
}

.partenaires-indicator:hover {
    background: var(--color-accent);
}

.partenaire-card {
    background: var(--color-light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--color-gray-light);
    position: relative;
    overflow: hidden;
    width: 200px;
    min-width: 200px;
    max-width: 200px;
    flex-shrink: 0;
}

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

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

.partenaire-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-secondary);
}

.partenaire-logo {
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 60px;
}

.partenaire-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    transition: var(--transition);
}

.partenaire-card:hover .partenaire-logo img {
    filter: grayscale(0%);
}

.partenaire-card h3 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 0;
    font-weight: 600;
}

.partenaire-card p {
    color: var(--color-gray);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* ===== SECTION CERTIFICATIONS ===== */
.certifications {
    padding: var(--spacing-xl) 0;
    background: var(--color-light);
}

.certifications-grid {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: var(--spacing-sm) 0;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

.certifications-grid::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}

.certification-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--color-gray-light);
    position: relative;
    overflow: hidden;
    min-width: 280px;
    flex-shrink: 0;
}

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

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

.certification-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-secondary);
}

.certification-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.certification-card h3 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    text-transform: uppercase;
}

.certification-card p {
    color: var(--color-gray);
    line-height: 1.6;
    font-size: 0.95rem;
    margin: 0;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-dark);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-sm);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo-img {
    height: 40px;
    width: auto;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: var(--spacing-md) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 0 var(--spacing-md);
    }
    
    .hero-video-overlay {
        background: rgba(0, 0, 0, 0.5);
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .services-studies {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .actualites-title {
        font-size: 1.5rem;
    }
    
    .modelisation-content {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .applications-grid {
        justify-content: center;
    }
    
    .partenaires-container {
        margin: var(--spacing-md) -10px 0;
    }
    
    .partenaires-nav-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .partenaires-nav-prev {
        left: -20px;
    }
    
    .partenaires-nav-next {
        right: -20px;
    }
    
    .partenaires-grid {
        gap: var(--spacing-sm);
    }
    
    .partenaire-card {
        width: 180px;
        min-width: 180px;
        max-width: 180px;
        padding: var(--spacing-sm);
    }
    
    .partenaire-logo {
        height: 50px;
    }
    
    .partenaire-card h3 {
        font-size: 1rem;
    }
    
    .certifications-grid {
        gap: var(--spacing-sm);
    }
    
    .certification-card {
        min-width: 250px;
        padding: var(--spacing-md);
    }
    
    .certification-icon {
        font-size: 2rem;
    }
    
    .certification-card h3 {
        font-size: 1rem;
    }
    
    .certification-card p {
        font-size: 0.9rem;
    }
    


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

    .depannage-features {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .partenaires-container {
        margin: var(--spacing-sm) -5px 0;
    }
    
    .partenaires-nav-btn {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
    
    .partenaires-nav-prev {
        left: -17px;
    }
    
    .partenaires-nav-next {
        right: -17px;
    }
    
    .partenaires-grid {
        gap: var(--spacing-xs);
    }
    
    .partenaire-card {
        width: 150px;
        min-width: 150px;
        max-width: 150px;
        padding: var(--spacing-xs);
    }
    
    .partenaire-logo {
        height: 45px;
    }
    
    .partenaire-card h3 {
        font-size: 0.9rem;
    }
    
    .certifications-grid {
        gap: var(--spacing-xs);
    }
    
    .certification-card {
        min-width: 220px;
        padding: var(--spacing-sm);
    }
    
    .certification-icon {
        font-size: 1.8rem;
    }
    
    .certification-card h3 {
        font-size: 0.9rem;
    }
    
    .certification-card p {
        font-size: 0.85rem;
    }
    

}

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

.service-card,
.contact-form {
    animation: fadeInUp 0.6s ease-out;
}

/* ===== ACCESSIBILITÉ ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible pour l'accessibilité */
.btn:focus,
.nav-link:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}