body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            margin: 40px;
            background-color: #f7f7f7;
        }
         header, footer {
                    background-color: #333;
                    color: #fff;
                    padding: 10px 20px;
                    text-align: center;
                }
        h1, h2, h3 {
            color: #2c3e50;
        }
        h1 {
                    color: white;
                }
        pre {
            background: #2d2d2d;
            color: #f1f1f1;
            padding: 15px;
            overflow-x: auto;
            border-radius: 5px;
        }
        .section {
            background: #ffffff;
            padding: 20px;
            border-radius: 6px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            margin-bottom: 30px;
        }
        img {
            display: block;
            margin: 20px auto;
            width: 100%;
            height: auto;
            word-wrap: break-word;
        }

            /* Conteneur 3D */
        #three-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            z-index: -1;
        }