body {
           
            margin-top: 180px;
        }

        /* Main Container Card */
        .case-study-card {
            background-color: #ffffff;
            border-radius: 12px;
            padding: 40px;
            box-shadow: 0 4px 25px rgba(0,0,0,0.05);
            max-width: 1200px;
            margin: 0 auto;
        }

        /* Title & Meta */
        .main-title {
            color: #0d6efd; /* Blue */
            font-weight: 700;
            font-size: 1.8rem;
            margin-bottom: 15px;
        }
        .meta-info {
            font-size: 0.9rem;
            color: #555;
            font-weight: 500;
        }
        .meta-info i {
            color: #0d6efd;
            margin-right: 5px;
        }
        .meta-badge {
            background-color: #f8f9fa;
            border: 1px solid #eee;
            padding: 4px 10px;
            border-radius: 6px;
            color: #333;
        }

        /* Layout Boxes (Top & Bottom Grid) */
        .feature-box {
            border: 1px solid #eaeaea;
            border-radius: 10px;
            padding: 25px;
            height: 100%;
        }
        .box-title {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            color: #222;
        }
        
        /* Icon Colors */
        .text-green { color: #2ecc71; }
        .text-yellow { color: #f39c12; }
        .text-red { color: #e74c3c; }
        .text-blue { color: #3498db; }

        .box-title i {
            font-size: 1.2rem;
            margin-right: 10px;
        }

        /* Nested Gray Cards (End Products, Feedstock, etc) */
        .nested-card {
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 15px;
            margin-bottom: 15px;
        }
        .nested-card:last-child {
            margin-bottom: 0;
        }
        .nested-category {
            font-size: 0.85rem;
            color: #666;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
        }
        .nested-category i {
            margin-right: 8px;
            font-size: 0.9rem;
        }
        .nested-value {
            font-size: 0.85rem;
            font-weight: 600;
            color: #2ecc71; /* Green text for values */
            display: flex;
            align-items: flex-start;
        }
        .nested-value i {
            margin-right: 6px;
            margin-top: 3px;
        }

        /* Paragraph Sections */
        .content-section {
            margin: 30px 0;
        }
        .section-heading {
            font-size: 1rem;
            font-weight: 700;
            color: #333;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        .section-heading i {
            margin-right: 10px;
            font-size: 1.1rem;
        }
        .content-text {
            font-size: 0.95rem;
            line-height: 1.7;
            color: #666;
            margin-bottom: 0;
        }
        .content-list {
            font-size: 0.95rem;
            line-height: 1.7;
            color: #666;
            padding-left: 20px;
            margin-bottom: 0;
        }
        .content-list li {
            margin-bottom: 8px;
        }

        /* Tags & Links */
        .source-link {
            text-decoration: underline;
            color: #0d6efd;
            font-weight: 500;
        }
        .tag-pill {
            background-color: #6c757d;
            color: white;
            font-size: 0.75rem;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 50px;
            margin-right: 5px;
            display: inline-block;
        }

        @media (max-width: 768px) {
            .case-study-card { padding: 20px; }
            .main-title { font-size: 1.4rem; }
        }