/* Styles de base */
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* Menu latéral */
        nav {
            background-color: #333;
            color: white;
            padding: 15px;
            width: 200px;
            height: 100vh;
            position: fixed;
            top: 0;
            left: 0;
        }

        nav a {
            color: white;
            text-decoration: none;
            display: block;
            margin: 10px 0;
        }

        nav a:hover {
            text-decoration: underline;
        }

        /* Contenu principal */
        main {
            margin-left: 220px; /* Pour éviter que le contenu ne soit caché par le menu */
            padding: 20px;
            flex: 1;
        }

        .content {
            display: flex;
            flex-wrap: wrap;
        }

        .column {
            flex: 1;
            min-width: 45%;
            margin: 10px;
        }

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

        footer a {
            color: white;
            text-decoration: none;
            margin: 0 10px;
        }

        footer a:hover {
            text-decoration: underline;
        }

        /* Flèche de retour en haut */
        .back-to-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background-color: #333;
            color: white;
            padding: 10px;
            text-decoration: none;
            border-radius: 50%;
        }

        .back-to-top:hover {
            background-color: #555;
        }