/* Kontrol paneli ve gridli arka plan için ek stiller */
        .viewer-panel {
            background: #555;
            color: #fff;
            border-radius: 12px;
            box-shadow: 0 4px 24px 0 rgba(0, 0, 0, 0.18);
            padding: 18px 16px 16px 16px;
            z-index: 10;
            min-width: 180px;
            font-size: 1rem;
            display: flex;
            flex-direction: column;
            gap: 12px;
            align-items: flex-start;
        }

        .viewer-panel .panel-title {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: #fff;
        }

        .viewer-panel .panel-desc {
            font-size: 0.95rem;
            color: #e0e0e0;
            margin-bottom: 8px;
        }

        .viewer-panel .panel-btn {
            background: #ef8f19;
            color: #fff;
            border: none;
            border-radius: 8px;
            padding: 7px 16px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.10);
            transition: background 0.2s, transform 0.2s;
            margin-bottom: 4px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .viewer-panel .panel-btn:hover {
            background: #d97706;
            transform: scale(1.05);
        }

        .viewer-panel .file-btn {
            background: #ef8f19;
            color: #fff;
            border: none;
            border-radius: 8px;
            padding: 7px 16px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.10);
            margin-top: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .viewer-panel .file-btn:hover {
            background: #d97706;
            transform: scale(1.05);
        }

        .product-detail-container {
            max-width: 1100px;
            margin: 40px auto;
            background: #fff;
            border-radius: 18px;
            box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.18);
            padding: 32px 32px 24px 32px;
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            align-items: flex-start;
        }

        .product-info {
            flex: 1 1 350px;
            min-width: 320px;
            height: 100%;
            position: relative;
        }

        .product-title {
            font-size: 2.2rem;
            font-weight: bold;
            color: #0a3d62;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .product-desc {
            font-size: 1.15rem;
            color: #444;
            margin-bottom: 18px;
            line-height: 1.6;
        }
        .product-stock-status {
            font-size: 1rem;
            color: #444;
            margin-bottom: 18px;
            line-height: 1.6;
            position: absolute;
            bottom: -1.5rem;
            left: 0;
        }

        .product-image {
            width: 100%;
            max-width: 400px;
            border-radius: 12px;
            box-shadow: 0 4px 24px 0 rgba(0, 0, 0, 0.10);
            margin-bottom: 18px;
        }

        .viewer-section {
            flex: 1 1 500px;
            min-width: 350px;
            border-radius: 16px;
            background: #d4d4d4;
            padding: 18px 18px 12px 18px;
            position: relative;
        }

        .viewer-controls {
            display: flex;
            gap: 12px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .viewer-btn {
            background: #ef8f19;
            color: #fff;
            border: none;
            border-radius: 8px;
            padding: 8px 18px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.10);
            transition: background 0.2s, transform 0.2s;
        }

        .viewer-btn:hover {
            background: #d97706;
            transform: translateY(-2px);
        }

        .fullscreen-btn {
            position: absolute;
            top: 12px;
            right: 12px;
            color: #fff;
            border-radius: 6px;
            padding: 6px 10px;
            font-size: 1.2rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.2s;
            z-index: 10;
        }

        @media (max-width: 900px) {
            .product-detail-container {
                flex-direction: column;
                align-items: stretch;
            }

            .viewer-section {
                min-width: unset;
            }
        }