/* ============================================
           RESET & BASE
           ============================================ */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: Arial, Helvetica, sans-serif;
            background: #ffffff;
            color: #333;
        }

        /* ============================================
           PAGE LAYOUT
           ============================================ */
        .page-container {
            min-height: 100vh;
            width: 100%;
        }

        /* ============================================
           MAIN CONTENT
           ============================================ */
        .main-content {
            padding: 10px 40px;
            max-width: 1200px;
            margin: 0 auto;
        }

        /* HEADER */
        .page-header h1 {
          font-size: 10px;
          color: yellow;
          border-bottom: 2px solid #0c6b3c;
          padding-bottom: 6px;
          margin-bottom: 20px;
          font-weight: bold;
        }
        
        .product-title {
          font-size: 20px;
          color: #b67b4a;
          font-style: italic;
          margin-bottom: 40px;
        }

        /* ============================================
           PRODUCT SECTION
           ============================================ */
        .product-section {
            display: grid;
            grid-template-columns: 90px 1fr 380px;
            gap: 40px;
            margin-bottom: 60px;
        }

        /* THUMBNAILS */
        .thumbnails {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .thumb {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border: 2px solid #ddd;
            cursor: pointer;
            border-radius: 5px;
        }

        .thumb:hover,
        .thumb.active {
            border-color: #0c6b3c;
        }

        /* MAIN IMAGE */
        .product-image {
            display: flex;
            justify-content: center;
            align-items: flex-start;
            background: #f9f9f9;
            border-radius: 10px;
            padding: 20px;
        }

        .product-image img {
            max-width: 100%;
            max-height: 500px;
            object-fit: contain;
        }

        /* ============================================
           PRODUCT OPTIONS
           ============================================ */
        .product-options {
            background: #f5f1e6;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .product-options h3 {
            font-size: 18px;
            color: #0c6b3c;
            margin-bottom: 15px;
        }

        /* MATERIAL */
        .material-choice {
            margin-bottom: 25px;
        }

        .material-option {
            display: flex;
            align-items: center;
            border: 2px solid #ccc;
            padding: 12px;
            margin-bottom: 12px;
            cursor: pointer;
            border-radius: 5px;
            transition: all 0.3s ease;
        }

        .material-option.active {
            background: #e8f4ed;
            border-color: #0c6b3c;
        }

        .material-option:hover {
            border-color: #0c6b3c;
            background: #f0f7f2;
        }

        .material-option input {
            display: none;
        }

        .material-box {
            width: 18px;
            height: 18px;
            border: 2px solid #0c6b3c;
            margin-right: 10px;
            border-radius: 3px;
            position: relative;
        }

        .material-option.active .material-box::after {
            content: "✓";
            position: absolute;
            top: -2px;
            left: 2px;
            color: #0c6b3c;
            font-weight: bold;
        }

        .material-label {
            font-size: 15px;
            color: #b67b4a;
            font-weight: 600;
        }

        /* STOCK */
        .stock-status {
            color: #0c6b3c;
            font-weight: bold;
            margin: 20px 0;
            font-size: 16px;
            display: flex;
            align-items: center;
        }

        .stock-status::before {
            content: "●";
            color: #0c6b3c;
            margin-right: 8px;
            font-size: 20px;
        }

        /* QUANTITY */
        .quantity-selector {
            display: flex;
            border: 2px solid #0c6b3c;
            width: fit-content;
            margin-bottom: 20px;
            border-radius: 5px;
            overflow: hidden;
        }

        .qty-btn {
            width: 40px;
            border: none;
            background: #f0f0f0;
            font-size: 20px;
            cursor: pointer;
            color: #0c6b3c;
            transition: background 0.3s;
        }

        .qty-btn:hover {
            background: #e0e0e0;
        }

        #quantity {
            width: 60px;
            border: none;
            text-align: center;
            font-size: 16px;
            font-weight: bold;
            background: white;
        }

        /* BUTTON */
        .btn-purchase {
            width: 100%;
            padding: 18px;
            background: #0c6b3c;
            color: white;
            border: none;
            font-weight: bold;
            cursor: pointer;
            border-radius: 5px;
            font-size: 18px;
            transition: background 0.3s;
            margin-top: 10px;
        }

        .btn-purchase:hover {
            background: #095530;
        }

        /* DELIVERY INFO */
        .delivery-info {
            background: #e8f4ed;
            padding: 15px;
            border-radius: 5px;
            margin-top: 20px;
            text-align: center;
            border: 1px solid #0c6b3c;
        }

        .delivery-info h4 {
            color: #0c6b3c;
            margin-bottom: 5px;
        }

        /* ============================================
           DETAILS SECTION
           ============================================ */
        .details-section {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 2px solid #e0e0e0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
        }

        .details-column h4 {
            color: #0c6b3c;
            margin-bottom: 20px;
            font-size: 20px;
            padding-bottom: 8px;
            border-bottom: 2px solid #e0e0e0;
        }

        .details-list,
        .specs-list,
        .feature-list {
            margin-left: 20px;
            line-height: 1.8;
            font-size: 15px;
            margin-bottom: 25px;
        }

        .details-list li,
        .specs-list li,
        .feature-list li {
            margin-bottom: 8px;
        }

        .feature-block {
            margin-bottom: 30px;
            padding-left: 15px;
            border-left: 3px solid #0c6b3c;
        }

        .feature-title {
            color: #0c6b3c;
            font-weight: bold;
            margin-bottom: 12px;
            font-size: 18px;
        }

        /* ============================================
           BENEFITS SECTION
           ============================================ */
        .benefits-section {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 50px;
            padding: 40px 0;
            border-top: 2px solid #e0e0e0;
            border-bottom: 2px solid #e0e0e0;
        }

        .benefit-box {
            text-align: center;
            padding: 20px;
            background: #f9f9f9;
            border-radius: 10px;
        }

        .benefit-box h4 {
            color: #0c6b3c;
            margin-bottom: 10px;
        }

        /* ============================================
           RESPONSIVE
           ============================================ */
        @media (max-width: 1100px) {
            .product-section {
                grid-template-columns: 80px 1fr 350px;
                gap: 30px;
            }
        }

        @media (max-width: 992px) {
            .main-content {
                padding: 30px;
            }

            .product-section {
                grid-template-columns: 1fr;
            }

            .thumbnails {
                flex-direction: row;
                justify-content: center;
                order: 2;
                margin-top: 20px;
            }

            .product-image {
                order: 1;
            }

            .product-options {
                order: 3;
            }

            .details-section {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .benefits-section {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .main-content {
                padding: 20px;
            }

            .page-header h1 {
                font-size: 32px;
            }

            .product-title {
                font-size: 20px;
            }

            .thumbnails {
                flex-wrap: wrap;
            }

            .product-options {
                padding: 20px;
            }
        }

        @media (max-width: 480px) {
            .page-header h1 {
                font-size: 28px;
            }

            .product-title {
                font-size: 18px;
            }

            .material-option {
                padding: 10px;
            }

            .btn-purchase {
                padding: 15px;
                font-size: 16px;
            }
        }