/* PRODUCT HERO */
        .product-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin: 48px 0; }
        @media (max-width: 992px) { .product-hero { grid-template-columns: 1fr; } }
        
        .gallery-main { width: 100%; height: 500px; background: #F1F5F9; border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; overflow: hidden; }
        .gallery-main img { width: 100%; height: 100%; object-fit: cover; }
        .gallery-thumbs { display: flex; gap: 16px; }
        .thumb { width: 80px; height: 80px; background: #F1F5F9; border-radius: 8px; cursor: pointer; border: 2px solid transparent; transition: var(--transition); overflow: hidden; }
        .thumb img { width: 100%; height: 100%; object-fit: cover; }
        .thumb:hover, .thumb.active { border-color: var(--primary-red); }

        .product-info-wrapper h1 { font-size: 2.5rem; font-weight: 800; color: var(--text-main); margin-bottom: 16px; line-height: 1.2; }
        .product-brand { display: inline-block; padding: 4px 12px; background: rgba(220, 38, 38, 0.1); color: var(--primary-red); border-radius: 4px; font-weight: 600; font-size: 0.875rem; margin-bottom: 16px; text-transform: uppercase; }
        .product-short-desc { font-size: 1.125rem; color: var(--text-muted); margin-bottom: 32px; line-height: 1.6; }
        
        .key-specs-box { background: var(--bg-light); border: 1px solid var(--border-color); border-radius: 8px; padding: 24px; margin-bottom: 32px; }
        .key-specs-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
        .key-specs-list li { display: flex; align-items: center; gap: 8px; font-size: 1rem; color: var(--text-main); }
        .key-specs-list li i { color: var(--primary-red); }
        
        .product-actions { display: flex; gap: 16px; }
        @media (max-width: 576px) { .product-actions { flex-direction: column; } }

        /* PRODUCT CONTENT GRID */
        .content-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 48px; margin-bottom: 80px; }
        @media (max-width: 992px) { .content-grid { grid-template-columns: 1fr; } }
        
        .content-section { margin-bottom: 48px; }
        .content-section h2 { font-size: 1.75rem; color: var(--text-main); margin-bottom: 24px; padding-bottom: 16px; border-bottom: 2px solid var(--border-color); position: relative; }
        .content-section h2::after { content: ''; position: absolute; left: 0; bottom: -2px; width: 60px; height: 2px; background: var(--primary-red); }
        .content-section p { line-height: 1.8; color: var(--text-muted); margin-bottom: 16px; font-size: 1.05rem; }

        /* SPEC TABLE */
        .spec-table { width: 100%; border-collapse: collapse; margin-bottom: 24px; }
        .spec-table th, .spec-table td { padding: 16px; border: 1px solid var(--border-color); text-align: left; }
        .spec-table th { background: var(--bg-light); font-weight: 600; color: var(--text-main); width: 30%; }
        .spec-table td { color: var(--text-muted); }

        /* SIDEBAR STICKY */
        .sidebar-sticky { position: sticky; top: 100px; background: var(--white); border: 1px solid var(--border-color); border-radius: 12px; padding: 32px; box-shadow: 0 4px 20px rgba(0,0,0,0.05); }
        .sidebar-sticky h3 { font-size: 1.25rem; margin-bottom: 16px; color: var(--text-main); }
        .sidebar-sticky p { color: var(--text-muted); margin-bottom: 24px; font-size: 0.95rem; }
        .form-group { margin-bottom: 16px; }
        .form-input { width: 100%; padding: 12px 16px; border: 1px solid var(--border-color); border-radius: 6px; outline: none; font-family: inherit; font-size: 1rem; }
        .form-input:focus { border-color: var(--primary-red); }

        /* FAQ */
        .faq-item { border: 1px solid var(--border-color); border-radius: 8px; margin-bottom: 16px; overflow: hidden; }
        .faq-question { padding: 16px 24px; background: var(--bg-light); font-weight: 600; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
        .faq-answer { padding: 24px; color: var(--text-muted); line-height: 1.6; display: none; background: var(--white); border-top: 1px solid var(--border-color); }
        .faq-item.active .faq-answer { display: block; }
        .faq-item.active .faq-question { color: var(--primary-red); }