body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            background-color: #f4f4f4;
            margin: 0;
            padding: 0;
        }
        header, footer {
            background-color: #333;
            color: #fff;
            padding: 10px 20px;
            text-align: center;
        }

    h2 {
            color: #333;
        }
        h1{
            color: #fff;
        }
        .h1{
            color: black;
        }
       /* Conteneur 3D */
#three-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
}

        .container {
            width: 80%;
            margin: 20px auto;
            background-color: #fff;
            padding: 20px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        pre {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 10px;
            border-radius: 5px;
            font-size: 1.1rem;
            white-space: pre-wrap;
            word-wrap: break-word;
        }

        .comment {
            color: #7f8c8d;
            font-style: italic;
        }

        .step {
            margin-bottom: 30px;
        }
        .img {
    display: block;
    margin: 20px auto;
    width: 100%;
    height: auto;
    word-wrap: break-word;
}