/* ============================================================
   PrimeHub — product.css
   Product detail page: gallery, variant chips, quantity stepper,
   description/specs/reviews/Q&A tabs.
   ============================================================ */

#product-detail-wrap{max-width:1200px;margin:0 auto;padding:0 12px 20px}

.product-layout{display:grid;grid-template-columns:minmax(280px,420px) 1fr;gap:24px;margin-bottom:16px}
@media (max-width:900px){.product-layout{grid-template-columns:1fr}}

.product-gallery{display:flex;flex-direction:column;gap:8px}
.gallery-main{aspect-ratio:1;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:6rem;position:relative;overflow:hidden;border:1px solid var(--ph-border);cursor:zoom-in}
.gallery-emoji{transition:transform 0.2s ease;transform-origin:var(--zoom-x,50%) var(--zoom-y,50%)}
.gallery-zoom-hint{position:absolute;bottom:10px;right:10px;background:rgba(15,17,17,0.7);color:#fff;border:none;font-size:11px;padding:5px 10px;border-radius:14px;pointer-events:none}
.gallery-thumbs{display:flex;gap:8px;flex-wrap:wrap}
.gallery-thumb{width:56px;height:56px;border-radius:6px;border:2px solid var(--ph-border);font-size:1.5rem;display:flex;align-items:center;justify-content:center}
.gallery-thumb.active,.gallery-thumb:hover{border-color:var(--ph-blue)}
.video-btn{background:var(--ph-light);border:1px solid var(--ph-border);border-radius:6px;padding:10px;font-size:12px;font-weight:700;color:var(--ph-blue);font-family:inherit}

.product-info{display:flex;flex-direction:column}
.product-brand{font-size:12px;color:var(--ph-blue);font-weight:700;margin-bottom:2px}
.product-title{font-size:20px;font-weight:800;line-height:1.3;margin-bottom:6px}
.product-rating-row{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--ph-muted);margin-bottom:10px;flex-wrap:wrap}
.product-rating-row .divider{color:var(--ph-border)}
.product-price-block{display:flex;align-items:baseline;gap:8px;margin-bottom:6px;padding-bottom:10px;border-bottom:1px solid var(--ph-border)}
.product-price-big{font-size:30px;font-weight:900;color:var(--ph-red)}
.product-ship-row{font-size:12px;color:var(--ph-blue);margin:10px 0 4px;display:flex;align-items:center;gap:6px}
.product-ship-row.free{color:var(--ph-green);font-weight:700}
.product-stock-row{font-size:12px;font-weight:700;color:var(--ph-green);margin-bottom:10px}
.product-stock-row.low{color:var(--ph-orange)}
.product-stock-row.oos{color:var(--ph-red)}

.product-vendor-row{display:flex;align-items:center;gap:10px;background:var(--ph-light);border-radius:8px;padding:8px 10px;margin-bottom:14px;cursor:pointer}
.vendor-name{font-size:12px;font-weight:700}
.vendor-rating{font-size:11px;color:var(--ph-muted)}

.variant-group{margin-bottom:14px}
.variant-label{font-size:12px;font-weight:700;margin-bottom:6px}
.variant-options{display:flex;flex-wrap:wrap;gap:6px}
.variant-chip{background:var(--ph-white);border:1px solid var(--ph-border);border-radius:20px;padding:6px 14px;font-size:12px;font-family:inherit;color:var(--ph-text)}
.variant-chip:hover{border-color:var(--ph-blue)}
.variant-chip.selected{border-color:var(--ph-blue);background:#E6F1FB;color:var(--ph-blue-dark);font-weight:700}

.qty-stepper{display:inline-flex;align-items:center;border:1px solid var(--ph-border);border-radius:20px;overflow:hidden}
.qty-stepper button{width:32px;height:32px;background:var(--ph-light);border:none;font-size:16px;font-weight:700;color:var(--ph-text)}
.qty-stepper span{min-width:32px;text-align:center;font-weight:700;font-size:13px}
.qty-stepper.sm button{width:24px;height:24px;font-size:13px}
.qty-stepper.sm span{min-width:24px;font-size:12px}

.product-actions{display:flex;gap:10px;margin-bottom:8px}
.product-actions .submit-btn{width:auto;flex:1;padding:12px}

.product-tabs-card{margin-bottom:16px}
.tab-bar{display:flex;overflow-x:auto;border-bottom:1px solid var(--ph-border)}
.tab-btn{background:none;border:none;font-family:inherit;font-size:13px;font-weight:700;padding:12px 16px;color:var(--ph-muted);white-space:nowrap;border-bottom:3px solid transparent}
.tab-btn.active{color:var(--ph-blue);border-bottom-color:var(--ph-blue)}
.tab-panel{display:none;padding:16px}
.tab-panel.active{display:block}
.specs-table{width:100%;border-collapse:collapse}
.specs-table th{text-align:left;font-size:12px;font-weight:700;color:var(--ph-muted);padding:8px 10px;width:40%;border-bottom:1px solid var(--ph-border);vertical-align:top}
.specs-table td{font-size:12px;padding:8px 10px;border-bottom:1px solid var(--ph-border)}

.review-summary{display:flex;align-items:center;gap:16px;padding-bottom:14px;margin-bottom:14px;border-bottom:1px solid var(--ph-border);flex-wrap:wrap}
.review-score{font-size:32px;font-weight:900}
.review-score-max{font-size:16px;color:var(--ph-muted);font-weight:600}
.review-form{background:var(--ph-light);border-radius:8px;padding:14px;margin-bottom:14px}
.star-picker{display:flex;gap:4px;font-size:22px}
.star-picker button{background:none;border:none;color:var(--ph-border)}
.star-picker button.picked{color:var(--ph-orange)}
.review-list{display:flex;flex-direction:column;gap:14px}
.review-item{padding-bottom:14px;border-bottom:1px solid var(--ph-border)}
.review-item:last-child{border-bottom:none}
.review-item-head{display:flex;align-items:center;gap:8px;margin-bottom:4px;flex-wrap:wrap}
.review-item p{font-size:13px;color:var(--ph-text);margin-bottom:6px;line-height:1.5}
.review-item-foot{font-size:11px;color:var(--ph-muted);display:flex;align-items:center;gap:10px}

.qna-ask{display:flex;gap:8px;margin-bottom:14px}
.qna-list{display:flex;flex-direction:column;gap:12px}
.qna-item{padding-bottom:12px;border-bottom:1px solid var(--ph-border)}
.qna-item:last-child{border-bottom:none}
.qna-q{font-size:13px;font-weight:700;margin-bottom:4px;display:flex;align-items:center;gap:6px}
.qna-a{font-size:12px;color:var(--ph-text);padding-left:22px}

@media (max-width:640px){
  .gallery-main{font-size:4rem}
  .product-price-big{font-size:24px}
  .product-actions{flex-direction:column}
  .tab-bar{font-size:12px}
  .review-summary{flex-wrap:wrap}
}

/* ---------- Product Details / Top Highlights (Amazon-style) ---------- */
.product-details-card{padding:0}
.product-details-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;background:none;border:none;padding:16px 18px;font-size:16px;font-weight:800;color:var(--ph-text);cursor:pointer;font-family:inherit}
.product-details-toggle i{font-size:18px;color:var(--ph-muted)}
.product-details-body{padding:0 18px 18px}
.highlights-table{width:100%;border-collapse:collapse;margin-bottom:14px}
.highlights-table tr{border-bottom:1px solid var(--ph-border)}
.highlights-table tr:last-child{border-bottom:none}
.highlights-table th{text-align:left;padding:10px 12px 10px 0;font-size:13px;font-weight:700;color:var(--ph-text);width:38%;vertical-align:top}
.highlights-table td{padding:10px 0;font-size:13px;color:var(--ph-muted)}
.highlights-bullets{padding-left:20px;display:flex;flex-direction:column;gap:10px}
.highlights-bullets li{font-size:13px;color:var(--ph-text);line-height:1.6}

@media (max-width:640px){
  .highlights-table th{width:44%;font-size:12px}
  .highlights-table td{font-size:12px}
  .product-details-toggle{font-size:14px;padding:14px}
}