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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

        #conteneur {
            max-width: 1100px;
            margin: 0 auto;
            background-color: #fff;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
        }

        #header {
            background: linear-gradient(135deg, #2c3e50 0%, #3d5266 100%);
            color: #fff;
            padding: 15px 30px;
            border-bottom: 4px solid #8b4513;
        }

        #lienhaut {
            text-align: right;
            font-size: 14px;
            margin-bottom: 10px;
        }

        #lienhaut a {
            color: #fff;
            text-decoration: none;
            margin: 0 8px;
            transition: color 0.3s;
        }

        #lienhaut a:hover {
            color: #d4af37;
        }

        #logo {
            text-align: center;
            padding: 20px 0;
        }

        #cssmenu {
            background-color: #8b4513;
            border-bottom: 3px solid #654321;
        }

        #cssmenu ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            padding: 0;
        }

        #cssmenu > ul > li {
            position: relative;
        }

        #cssmenu > ul > li > a {
            display: block;
            padding: 15px 20px;
            color: #fff;
            text-decoration: none;
            font-weight: 500;
            transition: background-color 0.3s;
        }

        #cssmenu > ul > li > a:hover,
        #cssmenu > ul > li.active > a {
            background-color: #654321;
        }

        #cssmenu ul ul {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background-color: #654321;
            min-width: 200px;
            z-index: 1000;
            flex-direction: column;
        }

        #cssmenu li:hover > ul {
            display: flex;
        }

        #cssmenu ul ul li {
            width: 100%;
        }

        #cssmenu ul ul a {
            padding: 12px 20px;
            color: #fff;
            text-decoration: none;
            display: block;
            transition: background-color 0.3s;
        }

        #cssmenu ul ul a:hover {
            background-color: #8b4513;
        }

        h1 {
            font-size: 2.5em;
            color: #2c3e50;
            text-align: center;
            padding: 40px 20px 30px;
            border-bottom: 3px solid #8b4513;
            margin-bottom: 30px;
            background: linear-gradient(to right, #f5f5f5, #fff, #f5f5f5);
        }

        article {
            padding: 30px 40px;
            max-width: 900px;
            margin: 0 auto;
        }

        article h2 {
            color: #8b4513;
            margin-top: 30px;
            margin-bottom: 15px;
            font-size: 1.8em;
            border-left: 4px solid #8b4513;
            padding-left: 15px;
        }

        article h3 {
            color: #654321;
            margin-top: 25px;
            margin-bottom: 12px;
            font-size: 1.4em;
        }

        article h4 {
            color: #2c3e50;
            margin-top: 20px;
            margin-bottom: 10px;
            font-size: 1.2em;
        }

        article p {
            margin-bottom: 15px;
            text-align: justify;
            color: #444;
        }

        article ul, article ol {
            margin-left: 30px;
            margin-bottom: 15px;
        }

        article li {
            margin-bottom: 8px;
        }

        article strong {
            color: #8b4513;
        }

        .transition-section {
            padding: 30px 40px;
            background-color: #f9f9f9;
            border-top: 2px solid #ddd;
            border-bottom: 2px solid #ddd;
        }

        .transition-section p {
            max-width: 900px;
            margin: 0 auto 15px;
            color: #555;
            line-height: 1.7;
        }

        .links-section {
            padding: 40px;
            background: linear-gradient(to bottom, #fff, #f5f5f5);
        }

        .links-section h2 {
            color: #2c3e50;
            text-align: center;
            margin-bottom: 35px;
            font-size: 2em;
            border-bottom: 3px solid #8b4513;
            padding-bottom: 15px;
            display: inline-block;
            width: 100%;
        }

        .links-section h3 {
            color: #8b4513;
            margin-top: 25px;
            margin-bottom: 15px;
            font-size: 1.5em;
            border-left: 4px solid #8b4513;
            padding-left: 12px;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 30px;
            margin-bottom: 25px;
        }

        .links-section li {
            break-inside: avoid;
            margin-bottom: 10px;
            padding-left: 20px;
            position: relative;
        }

        .links-section li:before {
            content: "→";
            position: absolute;
            left: 0;
            color: #8b4513;
            font-weight: bold;
        }

        .links-section a {
            color: #2c3e50;
            text-decoration: none;
            transition: color 0.3s;
            line-height: 1.8;
        }

        .links-section a:hover {
            color: #8b4513;
            text-decoration: underline;
        }

        #pied {
            background-color: #2c3e50;
            color: #fff;
            padding: 25px 40px;
            text-align: center;
            border-top: 4px solid #8b4513;
            font-size: 14px;
        }

        #pied a {
            color: #d4af37;
            text-decoration: none;
            margin: 0 5px;
        }

        #pied a:hover {
            text-decoration: underline;
        }

        @media (max-width: 768px) {
            #cssmenu > ul {
                flex-direction: column;
            }

            #cssmenu > ul > li {
                width: 100%;
            }

            #cssmenu ul ul {
                position: static;
                display: none;
            }

            #cssmenu li.active > ul {
                display: flex;
            }

            h1 {
                font-size: 1.8em;
                padding: 25px 15px 20px;
            }

            article {
                padding: 20px 20px;
            }

            .transition-section {
                padding: 20px;
            }

            .links-section {
                padding: 25px 20px;
            }

            .links-section ul {
                column-count: 1;
            }

            #pied {
                padding: 20px;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 1.5em;
            }

            article h2 {
                font-size: 1.4em;
            }

            article h3 {
                font-size: 1.2em;
            }

            #lienhaut {
                font-size: 12px;
            }
        }