:root {
            --background: #ffffff; --background-light: #f8f9fa; --foreground: #212529; --muted-foreground: #6c757d;
            --primary-blue: hsl(206, 90%, 54%); --primary-green: hsl(158, 77%, 52%); --card-border: #e9ecef;
            --card-bg: #ffffff; --header-shadow: 0 2px 10px rgba(0, 0, 0, 0.08); --radius-lg: 16px;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body { font-family: 'Inter', sans-serif; background: var(--background); color: var(--foreground); line-height: 1.6; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
        .btn { padding: 14px 28px; border-radius: 8px; font-weight: 600; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid transparent; cursor: pointer; transition: all 0.3s ease; font-size: 1rem; }
        .btn-primary { background: var(--primary-blue); color: white; }
        .btn-primary:hover { background: hsl(206, 90%, 48%); transform: translateY(-2px); }
        .btn-outline { background: transparent; border: 1px solid var(--card-border); color: var(--foreground); padding: 10px 20px; font-size: 0.9rem; }
        .btn-outline:hover { background: var(--background-light); border-color: var(--muted-foreground); }
        .tag { font-size: 0.8rem; font-weight: 500; padding: 4px 12px; border-radius: 20px; display: inline-block; }
        .tag.dosage { background-color: hsl(206, 100%, 94%); color: var(--primary-blue); }

        /* Breadcrumbs Bar Style */
        .breadcrumbs-bar { padding: 1rem 0; background: var(--background-light); border-bottom: 1px solid var(--card-border); }
        .breadcrumbs ol { list-style: none; display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; margin: 0; }
        .breadcrumbs li::after { content: '/'; margin-left: 0.5rem; color: var(--muted-foreground); }
        .breadcrumbs li:last-child::after { content: ''; }
        .breadcrumbs a { text-decoration: none; color: var(--muted-foreground); }
        .breadcrumbs a:hover { color: var(--primary-blue); }
        .breadcrumbs li:last-child a { color: var(--foreground); font-weight: 500; }

        /* Main Product Detail Section */
        .product-detail-section { padding: 4rem 0; background: white; }
        .product-detail-layout { display: grid; grid-template-columns: 1fr 1.25fr; gap: 4rem; align-items: flex-start; }
        
        .product-gallery .main-image { border: 1px solid var(--card-border); border-radius: var(--radius-lg); padding: 2rem; margin-bottom: 1rem; }
        .product-gallery .main-image img { width: 100%; height: auto; object-fit: contain; }
        .product-gallery .thumbnail-images { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
        .product-gallery .thumbnail-images .thumb { border: 2px solid var(--card-border); border-radius: 8px; padding: 0.5rem; cursor: pointer; transition: border-color 0.3s ease; }
        .product-gallery .thumbnail-images .thumb:hover, .product-gallery .thumbnail-images .thumb.active { border-color: var(--primary-blue); }
        .product-gallery .thumbnail-images .thumb img { width: 100%; height: auto; object-fit: contain; }

        /* Product Info (Right Column) */
        .product-info h1 { font-size: 2.5rem; font-weight: 700; margin-bottom: 1rem; line-height: 1.2; }
        .product-info .generic-name { font-size: 1.1rem; color: var(--muted-foreground); margin-bottom: 1rem; display: block; }
        .product-info .tag.dosage { margin-bottom: 1.5rem; }
        .product-info .short-description { font-size: 1.1rem; color: var(--muted-foreground); margin-bottom: 2rem; border-top: 1px solid var(--card-border); padding-top: 1.5rem; }
        .product-actions { display: flex; flex-wrap: wrap; gap: 1rem; }
        
        /* Tabs Section */
        .product-tabs-section { padding: 3rem 0; background: var(--background-light); border-top: 1px solid var(--card-border); }
        .tab-nav { display: flex; border-bottom: 2px solid var(--card-border); margin-bottom: 1.5rem; }
        .tab-btn { background: none; border: none; padding: 1rem 1.5rem; font-size: 1rem; font-weight: 500; cursor: pointer; color: var(--muted-foreground); border-bottom: 3px solid transparent; margin-bottom: -2px; }
        .tab-btn.active { color: var(--primary-blue); border-bottom-color: var(--primary-blue); }
        .tab-pane { display: none; background: white; padding: 2rem; border-radius: var(--radius-lg); border: 1px solid var(--card-border); }
        .tab-pane.active { display: block; animation: fadeIn 0.5s; }
        .tab-pane h3 { font-size: 1.25rem; margin-bottom: 1rem; }
        .tab-pane p, .tab-pane li { color: var(--muted-foreground); }
        .tab-pane table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
        .tab-pane th, .tab-pane td { text-align: left; padding: 0.75rem; border-bottom: 1px solid var(--card-border); }
        .tab-pane th { font-weight: 600; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

        /* Related Products Section */
        .related-products-section { padding: 4rem 0; background: white; }
        .related-products-section h2 { text-align: center; font-size: 2rem; margin-bottom: 2.5rem; }
        .product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
        .product-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius-lg); overflow: hidden; text-decoration: none; color: var(--foreground); }
        .product-card:hover { transform: translateY(-5px); box-shadow: 0 8px 30px rgba(0,0,0,0.08); }
        .product-card img { width: 100%; height: 200px; object-fit: contain; padding: 1rem; background: white; }
        .product-card-content { padding: 1.5rem; border-top: 1px solid var(--card-border); background: var(--background-light); }
        .product-card h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
        .product-card p { font-size: 0.9rem; color: var(--muted-foreground); }