/* ══ PRODUCT DETAIL LAYOUT ══ */
.pd-layout { max-width:1280px;margin:0 auto;padding:3.5rem 2rem;display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start; }

/* ── Gallery ── */
.pd-gallery { position:sticky;top:90px; }
.main-img { width:100%;aspect-ratio:4/3;border-radius:var(--radius-xl);overflow:hidden;background:#fef3e2;display:block;position:relative;border:2px solid #c8955a;cursor:zoom-in; }
.main-img img { width:100%;height:100%;object-fit:cover;transition:transform 0.4s; }
.main-img:hover img { transform:scale(1.04); }
.img-badge { position:absolute;top:14px;left:14px;background:var(--orange);color:white;font-size:0.65rem;font-weight:700;padding:0.25rem 0.75rem;border-radius:4px;text-transform:uppercase;letter-spacing:0.5px;z-index:2; }
.thumb-row { display:flex;gap:0.65rem;margin-top:0.85rem; }
.thumb { width:72px;height:72px;border-radius:var(--radius-md);border:2px solid var(--gray-200);overflow:hidden;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.8rem;background:var(--blue-light);transition:var(--transition);flex-shrink:0; }
.thumb img { width:100%;height:100%;object-fit:cover; }
.thumb.active,.thumb:hover { border-color:var(--blue);box-shadow:0 0 0 2px rgba(var(--rgb-primary),0.2); }
/* Zoom overlay */
.zoom-hint { position:absolute;bottom:14px;right:14px;background:rgba(var(--rgb-deep),0.65);color:rgba(255,255,255,0.85);font-size:0.65rem;padding:0.25rem 0.65rem;border-radius:20px;backdrop-filter:blur(4px); }

/* ── Product Info ── */
.pd-info {}
.pd-cat-tag { display:inline-flex;align-items:center;gap:0.4rem;font-size:0.7rem;font-weight:700;color:var(--blue);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:0.75rem; }
.pd-cat-tag::before { content:'';width:18px;height:2.5px;background:var(--blue);display:block;border-radius:2px; }
.pd-title { font-size:2rem;font-weight:900;color:var(--gray-900);line-height:1.15;margin-bottom:1rem; }
/* Rating */
.pd-rating { display:flex;align-items:center;gap:0.75rem;margin-bottom:1.25rem;padding-bottom:1.25rem;border-bottom:1px solid var(--gray-200); }
.stars { color:var(--yellow);font-size:1rem;letter-spacing:1px; }
.rating-num { font-size:0.85rem;font-weight:700;color:var(--gray-900); }
.rating-cnt { font-size:0.82rem;color:var(--gray-400); }
.in-stock { display:inline-flex;align-items:center;gap:0.35rem;background:#e8f5e9;color:#2e7d32;font-size:0.75rem;font-weight:700;padding:0.2rem 0.65rem;border-radius:20px;margin-left:0.5rem; }
.in-stock::before { content:'●';font-size:0.5rem; }
/* Short desc */
.pd-desc { color:var(--gray-500);font-size:0.95rem;line-height:1.85;margin-bottom:1.5rem; }
/* Spec chips */
.pd-specs-row { display:flex;flex-wrap:wrap;gap:0.5rem;margin-bottom:1.5rem; }
.spec-chip { display:inline-flex;align-items:center;gap:0.35rem;background:var(--blue-light);color:var(--blue-dark);font-size:0.75rem;font-weight:600;padding:0.3rem 0.8rem;border-radius:20px;border:1px solid rgba(var(--rgb-primary),0.15); }

/* Variant selector */
.pd-section-label { font-size:0.78rem;font-weight:800;color:var(--gray-900);text-transform:uppercase;letter-spacing:0.5px;margin-bottom:0.65rem; }
.size-options { display:flex;flex-wrap:wrap;gap:0.5rem;margin-bottom:1.5rem; }
.size-opt { padding:0.45rem 1rem;border-radius:var(--radius-sm);border:1.5px solid var(--gray-200);font-size:0.82rem;font-weight:600;cursor:pointer;background:white;color:var(--gray-700);transition:var(--transition); }
.size-opt:hover,.size-opt.active { border-color:var(--blue);background:var(--blue-light);color:var(--blue-dark); }

/* Quantity & order */
.pd-order-row { display:grid;grid-template-columns:130px 1fr;gap:0.75rem;margin-bottom:1rem; }
.qty-wrap { display:flex;align-items:center;border:1.5px solid var(--gray-200);border-radius:var(--radius-sm);overflow:hidden; }
.qty-btn { width:36px;height:44px;background:var(--gray-100);border:none;font-size:1.1rem;cursor:pointer;color:var(--gray-700);transition:var(--transition);display:flex;align-items:center;justify-content:center; }
.qty-btn:hover { background:var(--blue-light);color:var(--blue); }
.qty-inp { flex:1;height:44px;border:none;border-left:1.5px solid var(--gray-200);border-right:1.5px solid var(--gray-200);text-align:center;font-size:0.95rem;font-weight:700;outline:none;color:var(--gray-900);font-family:var(--font); }
.btn-order { display:flex;align-items:center;justify-content:center;gap:0.5rem;background:linear-gradient(135deg,var(--blue-mid),var(--blue-dark));color:white;border:none;border-radius:var(--radius-sm);font-size:0.9rem;font-weight:700;text-transform:uppercase;letter-spacing:0.3px;cursor:pointer;transition:var(--transition);box-shadow:0 4px 14px rgba(var(--rgb-primary),0.3); }
.btn-order:hover { filter:brightness(1.1);transform:translateY(-2px);box-shadow:0 8px 22px rgba(var(--rgb-primary),0.4); }
.btn-sample { width:100%;display:flex;align-items:center;justify-content:center;gap:0.5rem;background:white;color:var(--blue);border:2px solid var(--blue);border-radius:var(--radius-sm);padding:0.65rem;font-size:0.85rem;font-weight:700;text-transform:uppercase;cursor:pointer;transition:var(--transition);text-decoration:none; }
.btn-sample:hover { background:var(--blue-light); }

/* Trust chips */
.pd-trust { display:flex;gap:1.5rem;flex-wrap:wrap;padding:1.25rem 0;border-top:1px solid var(--gray-200);border-bottom:1px solid var(--gray-200);margin:1.25rem 0; }
.trust-chip { display:flex;align-items:center;gap:0.4rem;font-size:0.78rem;color:var(--gray-500); }
.trust-chip strong { color:var(--gray-900); }

/* Share */
.pd-share { display:flex;align-items:center;gap:0.75rem;font-size:0.8rem;color:var(--gray-400); }
.share-btn { width:34px;height:34px;border-radius:50%;background:var(--gray-100);border:1px solid var(--gray-200);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition);font-size:0.85rem;text-decoration:none; }
.share-btn:hover { background:var(--blue);border-color:var(--blue);color:white; }

/* ══ TABS DETAIL ══ */
.pd-tabs-wrap { max-width:1280px;margin:0 auto;padding:0 2rem 5rem; }
.tab-nav { display:flex;border-bottom:2px solid var(--gray-200);margin-bottom:2.5rem;gap:0;overflow-x:auto; }
.tab-btn { padding:0.9rem 1.6rem;background:none;border:none;border-bottom:2.5px solid transparent;margin-bottom:-2px;font-size:0.85rem;font-weight:700;color:var(--gray-400);cursor:pointer;white-space:nowrap;transition:var(--transition);font-family:var(--font);text-transform:uppercase;letter-spacing:0.3px; }
.tab-btn.active,.tab-btn:hover { color:var(--blue-dark);border-bottom-color:var(--blue); }
.tab-pane { display:none; }
.tab-pane.active { display:block; }

/* Tab: Mô tả */
.desc-grid { display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start; }
.desc-text h3 { font-size:1.1rem;font-weight:800;color:var(--blue-dark);text-transform:uppercase;margin-bottom:1rem; }
.desc-text p { color:var(--gray-500);line-height:1.85;font-size:0.95rem;margin-bottom:1rem; }
.feature-list { list-style:none;display:flex;flex-direction:column;gap:0.6rem; }
.feature-list li { display:flex;align-items:flex-start;gap:0.7rem;font-size:0.88rem;color:var(--gray-500);line-height:1.6; }
.feature-list li::before { content:'✓';width:20px;height:20px;background:var(--blue);color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.65rem;font-weight:700;flex-shrink:0;margin-top:1px; }
.desc-img { border-radius:var(--radius-xl);overflow:hidden;background:#fef3e2;aspect-ratio:4/3;display:block;border:2px solid #c8955a; }
.desc-img img { width:100%;height:100%;object-fit:cover; }

/* Tab: Thông số kỹ thuật */
.specs-table { width:100%;border-collapse:collapse; }
.specs-table tr:nth-child(even) td { background:var(--gray-50); }
.specs-table td { padding:0.9rem 1.25rem;font-size:0.88rem;border-bottom:1px solid var(--gray-200); }
.specs-table td:first-child { font-weight:700;color:var(--gray-700);width:35%;background:var(--blue-light);border-right:1px solid var(--gray-200); }
.specs-table td:last-child { color:var(--gray-500); }
.specs-note { background:var(--blue-light);border-left:3px solid var(--blue);padding:1rem 1.25rem;border-radius:0 var(--radius-md) var(--radius-md) 0;font-size:0.85rem;color:var(--blue-dark);margin-top:1.5rem;line-height:1.75; }

/* Tab: Download */
.download-grid { display:grid;grid-template-columns:repeat(auto-fit, minmax(260px, 1fr));gap:1rem; }
.dl-card { border:1.5px solid var(--gray-200);border-radius:var(--radius-lg);padding:1.25rem;display:flex;align-items:center;gap:1rem;text-decoration:none;color:inherit;transition:var(--transition); }
.dl-card:hover { border-color:var(--blue);background:var(--blue-light);transform:translateY(-2px); }
.dl-icon { width:44px;height:44px;border-radius:var(--radius-sm);background:var(--blue-light);display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0; }
.dl-name { font-size:0.85rem;font-weight:700;color:var(--gray-900);display:block;margin-bottom:0.2rem; }
.dl-size { font-size:0.72rem;color:var(--gray-400); }

/* Tab: Đánh giá */
.review-summary { display:grid;grid-template-columns:160px 1fr;gap:2.5rem;margin-bottom:2.5rem;padding-bottom:2.5rem;border-bottom:1px solid var(--gray-200);align-items:center; }
.rating-big { text-align:center; }
.rating-big .score { font-size:4rem;font-weight:900;color:var(--blue-dark);line-height:1; }
.rating-big .stars-big { color:var(--yellow);font-size:1.4rem;letter-spacing:2px; }
.rating-big .total { font-size:0.78rem;color:var(--gray-400);margin-top:0.25rem; }
.rating-bars { display:flex;flex-direction:column;gap:0.5rem; }
.rb { display:flex;align-items:center;gap:0.75rem;font-size:0.78rem;color:var(--gray-500); }
.rb-track { flex:1;height:8px;background:var(--gray-200);border-radius:4px;overflow:hidden; }
.rb-fill { height:100%;background:var(--yellow);border-radius:4px; }
.rb-pct { width:32px;text-align:right; }
.review-card { border:1.5px solid var(--gray-200);border-radius:var(--radius-lg);padding:1.5rem;margin-bottom:1.25rem;transition:var(--transition); }
.review-card:hover { border-color:var(--blue-light);box-shadow:var(--shadow-sm); }
.rv-head { display:flex;align-items:center;justify-content:space-between;margin-bottom:0.75rem; }
.rv-user { display:flex;align-items:center;gap:0.75rem; }
.rv-avatar { width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--blue-mid));display:flex;align-items:center;justify-content:center;font-size:1rem; }
.rv-name { font-weight:700;font-size:0.88rem;color:var(--gray-900); }
.rv-role { font-size:0.72rem;color:var(--gray-400); }
.rv-stars { color:var(--yellow);font-size:0.9rem; }
.rv-body { font-size:0.88rem;color:var(--gray-500);line-height:1.75; }
.rv-verified { display:inline-flex;align-items:center;gap:0.3rem;background:var(--blue-light);color:var(--blue);font-size:0.65rem;font-weight:700;padding:0.12rem 0.5rem;border-radius:10px;margin-top:0.5rem; }

/* ══ RELATED PRODUCTS ══ */
.related-section { background:var(--gray-50);padding:4rem 2rem; }
.related-grid { max-width:1280px;margin:1.5rem auto 0;display:grid;grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));gap:1.25rem; }
.related-card { background:white;border-radius:var(--radius-xl);overflow:hidden;border:2px solid #c8955a;transition:var(--transition);text-decoration:none;color:inherit;display:flex;flex-direction:column; }
.related-card:hover { border-color:#9a6030;box-shadow:0 8px 24px rgba(155,100,60,.2);transform:translateY(-3px); }
.related-card:hover .rc-img img { transform:scale(1.06); }
.rc-img { aspect-ratio:4/3;background:#fef3e2;display:flex;align-items:center;justify-content:center;font-size:3.5rem;overflow:hidden; }
.rc-img img { width:100%;height:100%;object-fit:cover;transition:transform 0.4s; }
.rc-body { padding:0.85rem 1rem;flex:1;display:flex;flex-direction:column;gap:0.3rem; }
.rc-name { font-size:0.85rem;font-weight:700;color:var(--gray-900);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1; }
.rc-link { font-size:0.75rem;color:var(--blue);font-weight:700;display:inline-flex;align-items:center;gap:0.25rem;margin-top:0.25rem;text-decoration:none; }
.rc-link:hover { color:var(--blue-dark); }

@media(max-width:1024px){ .pd-layout{grid-template-columns:1fr}.pd-gallery{position:static}.desc-grid{grid-template-columns:1fr}.download-grid{grid-template-columns:1fr 1fr}.related-grid{grid-template-columns:repeat(2,1fr)} }
@media(max-width:768px){ .pd-title{font-size:1.5rem}.pd-order-row{grid-template-columns:1fr}.review-summary{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr 1fr}.download-grid{grid-template-columns:1fr} }

@media (max-width: 480px) {
    .pd-layout { padding: 1.5rem 1rem; gap: 1.5rem; }
    .pd-title { font-size: 1.3rem; }
    .pd-order-row { grid-template-columns: 1fr; }
    .thumb-row { gap: 0.4rem; }
    .thumb { width: 56px; height: 56px; }
    .tab-btn { padding: 0.7rem 0.9rem; font-size: 0.75rem; }
    .pd-tabs-wrap { padding: 0 1rem 3rem; }
    .related-section { padding: 2.5rem 1rem; }
    .pd-trust { gap: 0.75rem; }
    .trust-chip { font-size: 0.72rem; }
    .btn-order, .btn-sample { padding: 0.8rem; font-size: 0.85rem; min-height: 44px; }
}
@media (max-width: 480px) {
    .related-grid { grid-template-columns: 1fr !important; }
    .download-grid { grid-template-columns: 1fr !important; }
}