.container {
            display: flex;
            max-width: 1600px;
            margin: 20px auto;
            gap: 20px;
        }
        .left-container {
            flex: 3;
            background-color: #fff;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        .right-container {
            flex: 1;
            background-color: #fff;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        .material-img {
display:block;
            max-width: 100%;
            height: auto;
            border-radius: 8px;
margin:20px auto;
        }
        .material-info h2 {
            font-size: 1.8rem;
            margin-bottom: 10px;
            color: #333;
        }
        .material-info p {
            font-size: 1rem;
            color: #555;
            margin: 5px 0;
        }
        .material-usage {
            margin-top: 20px;
        }
        .material-usage h3 {
            font-size: 1.4rem;
            color: #333;
            margin-bottom: 10px;
        }
        .material-usage p {
            font-size: 1rem;
            color: #555;
            line-height: 1.6;
text-align:center;
        }
        .right-container h3 {
            font-size: 1.4rem;
            color: #333;
            margin-bottom: 15px;
        }
        .featured-material {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            padding: 10px;
            border-radius: 8px;
            transition: background-color 0.3s;
        }
        .featured-material:hover {
            background-color: #f0f0f0;
        }
        .featured-material img {
            width: 60px;
            height: 60px;
            object-fit: cover;
            border-radius: 4px;
            margin-right: 10px;
        }
        .featured-material p {
            font-size: 0.9rem;
            color: #333;
            margin: 0;
        }
        .featured-material a {
            color: #007bff;
            text-decoration: none;
            font-size: 0.9rem;
        }
        .featured-material a:hover {
            text-decoration: underline;
        }
        hr {
            border: 0;
            border-top: 1px solid #e0e0e0;
            margin: 15px 0;
        }
        @media (max-width: 768px) {
            .container {
                flex-direction: column;
            }
            .left-container, .right-container {
                flex: 1;
            }
        }