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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
        }

        /* Header et Navigation */
        header {
            background: white;
            color: white;
            padding: 10px 0 10px 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        /* Sélecteur de langue */
.lang-switch {
    color: rgb(0, 98, 217);
    font-weight: bold;
    font-size: 0.9rem;
    margin-left: 1rem;
}

.lang-switch a {
    color: rgb(0, 98, 217);
    text-decoration: none;
    margin: 0 5px;
    transition: color 0.3s;
}

.lang-switch a:hover {
    color: #ffd700;
}

.lang-switch .active {
    color: #ffd700;
}


        nav {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .logo img {
            height: 60px;
            width: auto;
        }

        .logo-text {
            font-size: 1.2rem;
            font-weight: bold;
        }

        nav ul {
            list-style: none;
            display: flex;
            gap: 2rem;
        }

        nav a {
            color: rgb(0, 98, 217);
            text-decoration: none;
            transition: color 0.3s;
            font-weight: 700;
        }

        nav a:hover {
            color: #ffd700;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 26px;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(rgba(0, 82, 163, 0.8), rgba(0, 61, 122, 0.8)), 
                        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="%230052a3" width="1200" height="600"/><path fill="%23003d7a" d="M0 300 Q300 200 600 300 T1200 300 V600 H0 Z"/></svg>');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 2rem 100px;
            text-align: center;
            margin-top: 50px;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }

        .hero .tagline {
            font-size: 1.5rem;
            color: #ffd700;
            margin-bottom: 2rem;
            font-weight: 600;
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }

        .cta-button {
            display: inline-block;
            background: #ffd700;
            color: #0052a3;
            padding: 1rem 2rem;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            transition: transform 0.3s, box-shadow 0.3s;
            margin: 0.5rem;
        }

        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(255, 215, 0, 0.4);
        }

        .cta-button.secondary {
            background: white;
            color: #0052a3;
            border: 2px solid #ffd700;
        }

        .cta-button.secondary:hover {
            background: #ffd700;
            box-shadow: 0 5px 15px rgba(255, 255, 255, 0.3);
        }

        /* Galerie de projets */
        .projects-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .project-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .project-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,82,163,0.2);
        }

        .project-image {
            width: 100%;
            height: 250px;
            background-size: cover;
            background-position: center;
        }

        .project-content {
            padding: 1.5rem;
        }

        .project-content h3 {
            color: #0052a3;
            margin-bottom: 0.5rem;
            font-size: 1.2rem;
            text-align: center;
        }

        .project-content p {
            color: #666;
            line-height: 1.6;
            text-align: justify;
        }

        #projets {
            background: #f8f9fa;
        }

        /* Sections générales */
        section {
            padding: 4rem 2rem;
            margin: 0 auto;
        }

        h2 {
            color: #0052a3;
            font-size: 2.5rem;
            margin-bottom: 2rem;
            text-align: center;
            position: relative;
            padding-bottom: 1rem;
        }

        h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background: #ffd700;
        }

        /* Services */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .service-card {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,82,163,0.2);
        }

        .service-card h3 {
            color: #0052a3;
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }

        .service-card ul {
            list-style: none;
            padding-left: 0;
        }

        .service-card li {
            padding: 0.5rem 0;
            padding-left: 1.5rem;
            position: relative;
        }

        .service-card li::before {
            content: '⚓';
            position: absolute;
            left: 0;
            color: #0052a3;
        }

        /* À propos */
        #about {
            background: white;
        }

        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
            margin-top: 2rem;
        }

        .about-text h3 {
            color: #0052a3;
            margin-bottom: 1rem;
        }

        .highlight-box {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            border-left: 5px solid #ffd700;
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
        }

        .highlight-box h4 {
            color: #0052a3;
            margin-bottom: 1rem;
        }

        /* Contact */
        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            margin-top: 2rem;
        }

        .contact-form {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: #0052a3;
            font-weight: 600;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #e0e0e0;
            border-radius: 5px;
            font-family: inherit;
            transition: border-color 0.3s;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #0052a3;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 150px;
        }

        .submit-btn {
            background: #0052a3;
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: bold;
            transition: background 0.3s;
            width: 100%;
        }

        .submit-btn:hover {
            background: #003d7a;
        }

        .contact-info {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }

        .info-item {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #e0e0e0;
        }

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

        .info-item h4 {
            color: #0052a3;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .info-item p {
            color: #666;
            line-height: 1.8;
        }
        
/* === Partenaires === */
#partenaires {
    background: #f8f9fa;
    padding: 4rem 2rem;
    text-align: center;
}

#partenaires h2 {
    color: #0052a3;
    font-size: 2.2rem;
    margin-bottom: 2rem;
    position: relative;
}

.partners-slider {
    overflow: hidden;
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.slide-track {
    display: flex;
    width: calc(250px * 10); /* 10 logos affichés */
    animation: scroll 25s linear infinite;
}

.slide {
    width: 250px;
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.slide img {
    width: 150px;
    height: auto;
    filter: grayscale(100%);
    transition: filter 0.3s, transform 0.3s;
}

.slide img:hover {
    filter: none;
    transform: scale(1.1);
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-250px * 5)); } /* moitié des logos */
}

        /* Footer */
        footer {
            background: #0052a3;
            color: white;
            text-align: center;
            padding: 2rem;
            margin-top: 3rem;
        }

       /* Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
        background: none;
        border: none;
        color: rgb(0, 98, 217);
        font-size: 1.8rem;
        cursor: pointer;
    }

    nav {
        position: relative;
    }

    nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #9dc4eb; /* fond bleu du site */
        flex-direction: column;
        padding: 1rem;
        gap: 1rem;
        z-index: 999;
    }

    nav ul.active {
        display: flex;
    }

    /* Liens du menu mobile */
    nav a {
        color: rgb(0, 98, 217);
        text-align: center;
        font-weight: 500;
        font-size: 1.1rem;
    }

    nav a:hover {
        color: #ffd700; /* doré au survol */
    }

    /* Sélecteur de langue mobile */
    .lang-switch {
        text-align: center;
        margin-top: 0.5rem;
    }

    .lang-switch a {
        color: rgb(0, 98, 217);
        font-weight: bold;
        text-decoration: none;
        margin: 0 5px;
    }

    .lang-switch a:hover {
        color: #ffd700;
    }

    /* Ajustement du hero */
    .hero h1 {
        font-size: 2rem;
    }

    .hero .tagline {
        font-size: 1.2rem;
    }

    /* Sections en une seule colonne sur mobile */
    .about-content,
    .contact-container {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}