<style>
        /* Styles globaux */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            padding: 0 20px;
        }
        header {
            background-color: #333;
            color: #fff;
            padding: 15px 0;
            text-align: center;
        }
        header h1 {
            margin-bottom: 5px;
        }
        header p {
            font-size: 1.2em;
        }

        /* Menu de navigation */
        nav ul {
            list-style: none;
            display: flex;
            justify-content: center;
            background-color: #444;
            padding: 10px;
            margin-top: 10px;
        }
        nav ul li {
            margin: 0 15px;
        }
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: bold;
            padding: 10px 20px;
            background-color: #007BFF; /* Bleu pour les liens */
            border-radius: 5px;
            transition: background-color 0.3s ease;
        }
        nav ul li a:hover {
            background-color: #0056b3; /* Bleu foncé au survol */
        }

        /* Contenu principal */
        .content {
            max-width: 1200px;
            margin: 20px auto;
            text-align: center;
        }
        .content h2 {
            font-size: 2em;
            margin-bottom: 15px;
            color: #333;
        }
        .content img {
            width: 100%;
            height: auto;
            max-width: 800px;
            margin: 20px 0;
        }
        .content p {
            margin: 20px 0;
            text-align: justify;
            font-size: 1.1em;
            line-height: 1.8;
        }

        /* Pied de page */
        footer {
            background-color: #333;
            color: white;
            text-align: center;
            padding: 10px 0;
            margin-top: 20px;
        }
        footer p {
            margin: 5px 0;
        }

        /* Adaptation pour les petits écrans */
        @media screen and (max-width: 768px) {
            nav ul {
                flex-direction: column;
            }
            nav ul li {
                margin: 5px 0;
            }
            .content img {
                max-width: 100%;
            }
        }
    </style>