/* Variables et reset CSS */
        :root {
            --primary-color: #0056b3;
            --secondary-color: #f8f9fa;
            --accent-color: #e9ecef;
            --text-color: #333;
            --footer-color: #0a2240;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 5px;
            --max-width: 1200px;
            --spacing: 5rem;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            overflow-x: hidden;
        }
        
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
        }

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

        /* Page Header */
        .page-header {
            margin-top: 80px;
            padding: 3rem 2rem;
            background-color: var(--secondary-color);
            text-align: center;
        }
        
        .page-title {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        .page-subtitle {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto;
            color: #666;
        }

        /* References Section */
        .references-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 2rem;
        }
        
        .reference-item {
            display: flex;
            flex-direction: column;
            margin-bottom: var(--spacing);
            padding: 2rem;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .reference-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .reference-content {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        
        .reference-image {
            flex: 1;
            min-height: 300px;
            background-position: center;
            background-size: cover;
            border-radius: var(--border-radius);
        }
        
        .reference-text {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        
        .reference-title {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .reference-description {
            margin-bottom: 1rem;
        }
        
    
        
        /* Responsive Design */
        @media screen and (min-width: 768px) {
            .reference-content {
                flex-direction: row;
            }
            
            .reference-item:nth-child(even) .reference-content {
                flex-direction: row-reverse;
            }
        }
        
        @media screen and (max-width: 768px) {
            .navbar {
                padding: 1rem;
            }
            
            .nav-links {
                gap: 1rem;
            }
            
            .page-title {
                font-size: 2rem;
            }
            
            .reference-image {
                min-height: 200px;
            }
        }

        /* RESPONSIVE DESIGN */
@media screen and (max-width: 992px) {
  
    .footer .container {
       grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {

    .page-header {
        text-align: left;
    }


    .header-content h1 {
        font-size: 36px;
    }

    .nav-links {
        position: fixed;
        right: -100%;
        top: 70px;
        height: calc(100vh - 70px);
        background-color: white;
        flex-direction: column;
        width: 50%;
        text-align: center;
        transition: 0.5s;
        box-shadow: -5px 0 10px rgba(0, 0, 0, 0.1);
        padding-top: 40px;
    }

    .nav-links li {
        margin: 15px 0;
    }

    .burger {
        display: block;
    }

    .nav-active {
        right: 0;
    }

    .toggle .line1 {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .toggle .line2 {
        opacity: 0;
    }

    .toggle .line3 {
        transform: rotate(45deg) translate(-5px, -6px);
    }
    
    /* Ajustement du logo sur mobile */
    .logo img {
        height: 40px;
    }
}

@media screen and (max-width: 576px) {

    .page-header {
        text-align: left;
    }

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

    /* Ajustement du logo sur mobile petit écran */
    .logo img {
        height: 35px;
    }
}