/* ================================================================
   NEXTEONIX — Premium Product Detail CSS  |  v3 Gallery Sticky Fix
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,400&family=DM+Serif+Display:ital@0;1&display=swap');

:root {
    --primary:       #0b5cab;
    --primary-dark:  #082e56;
    --primary-dk:    #083d7a;
    --primary-lt:    #e8f1fe;
    --accent:        #e51d2f;
    --accent-dk:     #b91c1c;
    --green:         #16a34a;
    --green-bg:      rgba(22,163,74,0.08);
    --gold:          #f59e0b;
    --text:          #132238;
    --text-mid:      #607086;
    --muted:         #607086;
    --muted-light:   #94a3b8;
    --border:        #d9e1ec;
    --border-light:  #f5f7fb;
    --bg:            #eef2f7;
    --surface-alt:   #f5f7fb;
    --white:         #ffffff;
    --card-shadow:   0 2px 12px rgba(0,0,0,0.07);
    --card-shadow-hover: 0 10px 32px rgba(11,92,171,0.16);
    --radius:        12px;
    --radius-sm:     8px;
    --radius-xs:     6px;
}

.det-wrap, .det-info, .det-buy-card { font-family: 'DM Sans', sans-serif; }

/* BREADCRUMB */
.det-breadcrumb { background: var(--white); border-bottom: 1px solid var(--border); padding: 13px 0; font-size: 0.72rem; color: var(--muted); font-weight: 500; }
.det-breadcrumb .container { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.det-breadcrumb a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
.det-breadcrumb a:hover { color: var(--primary-dark); }
.det-breadcrumb svg { width: 11px; height: 11px; opacity: 0.4; }
.det-breadcrumb span { color: var(--text-mid); font-weight: 600; }

/* ================================================================
   LAYOUT — align-items:start is REQUIRED for sticky to work
   ================================================================ */
.det-wrap {
    max-width: 1280px;
    margin: 0 auto;
    padding: 40px 24px;
    display: grid;
    grid-template-columns: minmax(320px, 380px) 1fr;
    gap: 48px;
    align-items: start;   /* ← DO NOT change this to stretch/center */
    background: var(--bg);
    position: relative;
}

/* ================================================================
   GALLERY STICKY — 3 rules that make it work:
   1. position: sticky
   2. top: (your header height)
   3. height: fit-content  ← most commonly forgotten
   ================================================================ */
.det-gallery {
    align-self: start;
    position: sticky;
    top: 80px;            /* adjust to match your actual header height */
    height: fit-content;  /* CRITICAL — without this sticky breaks */
    width: 100%;
    z-index: 20;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.det-main-img {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px;
    position: relative;
    cursor: zoom-in;
    width: 100%;
    height: auto;
    min-height: 300px;
    box-shadow: var(--card-shadow);
    transition: box-shadow 0.35s ease;
}
.det-main-img::after { content:''; position:absolute; inset:0; background:radial-gradient(ellipse at 30% 20%, rgba(11,92,171,0.03) 0%, transparent 70%); pointer-events:none; }
.det-main-img:hover { box-shadow: var(--card-shadow-hover); }
.det-main-img img { 
    width:100%; 
    height:100%; 
    object-fit:contain; 
    transition:transform 0.4s cubic-bezier(0.25,0.46,0.45,0.94); 
    position:relative; 
    z-index:1; 
    display: block;
}
.det-main-img:hover img { transform: scale(1.04); }

.det-main-img .gallery-nav { position:absolute; top:50%; transform:translateY(-50%); display:flex; justify-content:space-between; left:14px; right:14px; pointer-events:none; opacity:0; transition:opacity 0.25s; z-index:3; }
.det-main-img:hover .gallery-nav { opacity:1; }

.gallery-arrow { width:38px; height:38px; border-radius:50%; background:var(--white); box-shadow:0 2px 12px rgba(0,0,0,0.12); display:grid; place-items:center; border:1px solid var(--border); cursor:pointer; pointer-events:all; transition:all 0.2s; color:var(--primary); }
.gallery-arrow:hover { background:var(--primary); color:var(--white); border-color:var(--primary); transform:scale(1.08); box-shadow:0 4px 16px rgba(8,46,86,0.25); }
.gallery-arrow svg { width:15px; height:15px; stroke-width:2.5; }

.det-thumbs { 
    display: flex; 
    gap: 10px; 
    margin-top: 14px; 
    flex-wrap: wrap; 
    padding: 0 2px; 
    width: 100%;
    justify-content: flex-start;
}
.det-thumb { width:68px; height:68px; border-radius:var(--radius-sm); border:2px solid var(--border); overflow:hidden; cursor:pointer; background:var(--white); display:flex; align-items:center; justify-content:center; padding:6px; transition:all 0.2s; }
.det-thumb.active { border-color:var(--primary); box-shadow:0 0 0 3px rgba(11,92,171,0.12); }
.det-thumb:hover { border-color:var(--primary); box-shadow:0 2px 8px rgba(0,0,0,0.08); }
.det-thumb img { width:100%; height:100%; object-fit:contain; }

.det-badge { position:absolute; top:16px; left:16px; z-index:4; background:var(--primary); color:var(--white); font-size:0.62rem; font-weight:800; padding:5px 11px; border-radius:5px; text-transform:uppercase; letter-spacing:0.08em; box-shadow:0 3px 10px rgba(8,46,86,0.25); }

/* PRODUCT INFO */
.det-info { 
    display: flex; 
    flex-direction: column; 
    gap: 0;
    width: 100%;
    overflow-y: visible;
}

.det-brand-row { display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin-bottom:10px; }
.det-brand { font-size:0.68rem; font-weight:800; color:var(--muted); text-transform:uppercase; letter-spacing:0.12em; background:var(--border-light); padding:4px 10px; border-radius:5px; border:1px solid var(--border); }
.det-model { font-size:0.68rem; color:var(--muted); background:var(--border-light); padding:4px 10px; border-radius:5px; font-weight:600; border:1px solid var(--border); }
.det-cat-badge { font-size:0.66rem; background:var(--primary-lt); color:var(--primary); font-weight:700; padding:4px 10px; border-radius:999px; text-decoration:none; border:1px solid rgba(11,92,171,0.2); transition:all 0.2s; }
.det-cat-badge:hover { background:var(--primary); color:var(--white); border-color:var(--primary); }

.det-name { font-family:'DM Serif Display',serif; font-size:2rem; font-weight:400; line-height:1.25; color:var(--text); margin:0 0 16px 0; letter-spacing:-0.01em; }

.det-rating-row { display:flex; align-items:center; gap:10px; flex-wrap:wrap; padding:14px 0; border-top:1px solid var(--border); border-bottom:1px solid var(--border); margin-bottom:24px; }
.det-stars { color:var(--gold); font-size:0.88rem; letter-spacing:1px; }
.det-rating-num { font-size:0.85rem; font-weight:800; color:var(--text); }
.det-reviews { font-size:0.78rem; color:var(--primary); text-decoration:underline; cursor:pointer; font-weight:600; transition:color 0.2s; }
.det-reviews:hover { color:var(--primary-dark); }

/* BUY CARD */
.det-buy-card { 
    background: var(--white); 
    border: 1px solid var(--border); 
    border-radius: var(--radius); 
    padding: 28px; 
    box-shadow: var(--card-shadow); 
    position: relative;
    transition: box-shadow 0.3s; 
    margin-bottom: 20px;
}
.det-buy-card:hover { box-shadow:var(--card-shadow-hover); }
.det-buy-card .det-price-block { background:transparent; border:0; padding:0; }

.det-price-block { background:transparent; border:0; border-bottom:1px solid var(--border-light); padding-bottom:20px; margin-bottom:16px; }
.det-price-row { display:flex; align-items:baseline; gap:12px; flex-wrap:wrap; margin-bottom:6px; }
.det-price-main { font-family:'DM Serif Display',serif; font-size:2.6rem; font-weight:400; color:var(--accent); line-height:1; letter-spacing:-0.02em; }
.det-orig { font-size:1rem; color:var(--muted-light); text-decoration:line-through; font-weight:500; }
.det-off { font-size:0.78rem; font-weight:800; color:var(--green); background:var(--green-bg); padding:3px 9px; border-radius:5px; border:1px solid rgba(22,163,74,0.2); letter-spacing:0.02em; }
.det-savings { font-size:0.78rem; color:var(--green); margin-top:5px; font-weight:700; }
.det-tax { font-size:0.72rem; color:var(--muted-light); margin-top:5px; }

.det-stock { display:flex; align-items:center; gap:7px; font-size:0.8rem; font-weight:700; padding:12px 0; }
.det-stock.in { color:var(--green); }
.det-stock.out { color:var(--accent); }
.det-stock svg { width:15px; height:15px; }

.det-qty-row { display:flex; align-items:center; gap:16px; padding:14px 0; }
.det-qty-label { font-size:0.78rem; font-weight:700; color:var(--text-mid); text-transform:uppercase; letter-spacing:0.05em; }
.qty-ctrl { display:flex; align-items:center; border:1.5px solid var(--border); border-radius:var(--radius-sm); overflow:hidden; background:var(--border-light); transition:border-color 0.2s; }
.qty-ctrl:focus-within { border-color:var(--primary); }
.qty-btn { width:40px; height:40px; border:0; background:transparent; cursor:pointer; display:grid; place-items:center; transition:all 0.15s; color:var(--text-mid); }
.qty-btn .qty-symbol { font-size:1.15rem; font-weight:800; line-height:1; }
.qty-btn:hover { background:var(--border); color:var(--primary); }
.qty-inp { width:52px; text-align:center; border:0; border-left:1.5px solid var(--border); border-right:1.5px solid var(--border); font-size:0.88rem; font-weight:700; padding:0; height:40px; outline:0; background:var(--white); color:var(--text); font-family:'DM Sans',sans-serif; }
.qty-inp::-webkit-outer-spin-button,
.qty-inp::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.qty-inp[type=number] { -moz-appearance: textfield; }

.det-buy-more { margin-top:20px; padding-top:20px; border-top:1px solid var(--border-light); }
.det-buy-more-title { font-weight:800; color:var(--text); font-size:0.78rem; margin-bottom:12px; text-transform:uppercase; letter-spacing:0.08em; display:flex; align-items:center; gap:8px; }
.det-buy-more-title::before { content:''; display:inline-block; width:3px; height:14px; background:linear-gradient(180deg,var(--primary) 0%,var(--primary-dark) 100%); border-radius:2px; }
.det-buy-more-grid { display:grid; grid-template-columns:1fr 1fr 1fr; gap:8px; }
.det-buy-more-item { display:flex; flex-direction:column; align-items:center; justify-content:center; gap:4px; background:var(--border-light); border:1.5px solid var(--border); border-radius:var(--radius-sm); padding:12px 8px; font-weight:700; color:var(--text-mid); font-size:0.82rem; transition:all 0.2s; cursor:pointer; text-align:center; }
.det-buy-more-item:hover { border-color:var(--primary); background:rgba(11,92,171,0.05); color:var(--primary-dark); box-shadow:0 2px 8px rgba(11,92,171,0.1); }
.det-buy-more-item.active { border-color:var(--primary); background:var(--primary-lt); color:var(--primary-dark); box-shadow:0 2px 10px rgba(11,92,171,0.16); }
.det-buy-more-item span { color:var(--primary); font-weight:700; font-size:0.68rem; background:var(--primary-lt); padding:2px 7px; border-radius:4px; text-transform:uppercase; letter-spacing:0.04em; }

.det-cta { display:flex; gap:10px; flex-wrap:wrap; padding-top:20px; border-top:1px solid var(--border-light); margin-top:4px; }
.det-btn-cart { flex:1; min-width:140px; background:var(--primary); color:var(--white); border:0; border-radius:var(--radius-sm); padding:15px 20px; font-size:0.85rem; font-weight:700; cursor:pointer; transition:all 0.22s cubic-bezier(0.25,0.46,0.45,0.94); display:flex; align-items:center; justify-content:center; gap:8px; box-shadow:0 4px 14px rgba(8,46,86,0.2); font-family:'DM Sans',sans-serif; letter-spacing:0.02em; }
.det-btn-cart:hover { background:var(--primary-dk); transform:translateY(-2px); box-shadow:0 8px 24px rgba(8,46,86,0.35); }
.det-btn-cart:active { transform:translateY(0); }
.det-btn-cart svg { width:17px; height:17px; }

.det-btn-buy { flex:1; min-width:140px; background:var(--accent); color:var(--white); border:0; border-radius:var(--radius-sm); padding:15px 20px; font-size:0.85rem; font-weight:700; cursor:pointer; transition:all 0.22s cubic-bezier(0.25,0.46,0.45,0.94); display:flex; align-items:center; justify-content:center; gap:8px; box-shadow:0 4px 14px rgba(229,29,47,0.22); font-family:'DM Sans',sans-serif; letter-spacing:0.02em; }
.det-btn-buy:hover { background:var(--accent-dk); transform:translateY(-2px); box-shadow:0 8px 24px rgba(185,28,28,0.35); }
.det-btn-buy:active { transform:translateY(0); }
.det-btn-buy svg { width:17px; height:17px; }

.det-btn-wish { width:50px; height:50px; border-radius:var(--radius-sm); border:1.5px solid var(--border); background:var(--white); display:grid; place-items:center; cursor:pointer; transition:all 0.2s; flex-shrink:0; color:var(--muted); }
.det-btn-wish:hover { border-color:var(--primary); background:var(--primary-lt); color:var(--primary); }
.det-btn-wish svg { width:18px; height:18px; }
.det-btn-wish.wished { color:var(--primary); border-color:var(--primary); background:var(--primary-lt); }
.det-btn-wish.wished svg { fill:var(--primary); }

.det-trust { display:flex; gap:8px; flex-wrap:wrap; margin-top:20px; padding-top:20px; border-top:1px solid var(--border-light); }
.det-trust-pill { display:flex; align-items:center; gap:6px; font-size:0.71rem; font-weight:700; color:var(--text-mid); background:var(--border-light); border:1px solid var(--border); padding:8px 12px; border-radius:6px; transition:all 0.2s; letter-spacing:0.01em; }
.det-trust-pill:hover { background:var(--green-bg); border-color:rgba(22,163,74,0.25); color:var(--green); }
.det-trust-pill svg { width:14px; height:14px; color:var(--green); flex-shrink:0; }

/* CONTENT SECTIONS */
.det-content-stack { display:flex; flex-direction:column; gap:14px; }
.det-stack-block { background:var(--white); border:1px solid var(--border); border-radius:var(--radius); padding:26px 28px; box-shadow:var(--card-shadow); transition:box-shadow 0.25s; }
.det-stack-block:hover { box-shadow:0 2px 12px rgba(0,0,0,0.07); }

.det-subhead { font-family:'DM Serif Display',serif; font-size:1.15rem; font-weight:400; color:var(--text); margin:0 0 18px 0; padding-bottom:12px; border-bottom:1px solid var(--border-light); letter-spacing:-0.01em; position:relative; }
.det-subhead::after { content:''; position:absolute; bottom:-1px; left:0; width:36px; height:2px; background:var(--primary); border-radius:2px; }

.feat-list { list-style:none; display:flex; flex-direction:column; gap:12px; }
.feat-list li { display:flex; align-items:flex-start; gap:12px; font-size:0.85rem; color:var(--text-mid); line-height:1.65; }
.feat-list li .feat-icon { width:22px; height:22px; border-radius:50%; background:var(--primary-lt); display:grid; place-items:center; flex-shrink:0; margin-top:1px; }
.feat-list li .feat-icon svg { width:11px; height:11px; color:var(--primary); }

.spec-table { width:100%; border-collapse:collapse; font-size:0.83rem; }
.spec-table tr { border-bottom:1px solid var(--border-light); transition:background 0.15s; }
.spec-table tr:last-child { border-bottom:0; }
.spec-table tr:hover td { background:var(--border-light) !important; }
.spec-table td { padding:13px 16px; }
.spec-table td:first-child { font-weight:700; color:var(--text); width:38%; background:var(--surface-alt); font-size:0.8rem; text-transform:uppercase; letter-spacing:0.04em; }
.spec-table td:last-child { color:var(--text-mid); }
.det-long-text { display:flex; flex-direction:column; gap:12px; }

/* RELATED */
.related-section { max-width:1280px; margin:0 auto; padding:48px 24px 56px; }
.related-section h2 { font-family:'DM Serif Display',serif; font-size:1.6rem; font-weight:400; margin-bottom:28px; color:var(--text); letter-spacing:-0.02em; }
.related-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }

.pcard { background:var(--white); border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; transition:all 0.25s cubic-bezier(0.25,0.46,0.45,0.94); box-shadow:var(--card-shadow); position:relative; display:flex; flex-direction:column; }
.pcard:hover { transform:translateY(-4px); box-shadow:var(--card-shadow-hover); }
.pcard-badge { position:absolute; top:12px; left:12px; z-index:2; background:var(--primary); color:var(--white); font-size:0.58rem; font-weight:800; padding:4px 9px; border-radius:4px; text-transform:uppercase; letter-spacing:0.08em; }
.pcard-body { padding:14px 16px 8px; flex:1; }
.pcard-brand { font-size:0.62rem; font-weight:800; color:var(--muted); text-transform:uppercase; letter-spacing:0.1em; display:block; margin-bottom:4px; }
.pcard-name { font-size:0.82rem; font-weight:600; line-height:1.4; color:var(--text); margin:0 0 8px 0; }
.pcard-rating { display:flex; align-items:center; gap:4px; margin-bottom:10px; }
.pcard-stars { color:var(--gold); font-size:0.72rem; }
.pcard-rcount { font-size:0.68rem; color:var(--muted); }
.pcard-price-row { display:flex; align-items:baseline; gap:6px; flex-wrap:wrap; }
.pcard-price { font-size:1rem; font-weight:800; color:var(--text); }
.pcard-orig { font-size:0.76rem; color:var(--muted-light); text-decoration:line-through; }
.pcard-off { font-size:0.68rem; font-weight:800; color:var(--green); background:var(--green-bg); padding:1px 6px; border-radius:3px; }
.pcard-footer { padding:12px 16px 16px; }
.buy-btn { width:100%; background:transparent; color:var(--primary); border:1.5px solid var(--primary); border-radius:var(--radius-xs); padding:9px 14px; font-size:0.72rem; font-weight:800; cursor:pointer; transition:all 0.2s; letter-spacing:0.05em; font-family:'DM Sans',sans-serif; }
.buy-btn:hover { background:var(--primary); color:var(--white); box-shadow:0 4px 12px rgba(11,92,171,0.25); }

#mobCta { display:none; position:fixed; bottom:0; left:0; right:0; z-index:39; background:var(--white); border-top:1px solid var(--border); padding:12px 16px; gap:10px; box-shadow:0 -4px 24px rgba(0,0,0,0.08); }

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1200px) {
    .det-wrap { grid-template-columns: 320px 1fr; gap: 32px; padding: 32px 20px; }
    .det-gallery { top: 75px; max-width: 320px; }
}

@media (max-width: 1024px) {
    .det-wrap { grid-template-columns: 1fr; gap: 28px; }
    .det-gallery { position: static; height: auto; width: 100%; max-width: 100%; top: auto; z-index: auto; } /* sticky OFF for mobile */
    .det-main-img { max-width: 440px; margin: 0 auto; }
    .det-buy-card { position: relative; }
    .related-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .det-wrap { padding: 20px 14px; gap: 20px; }
    .det-gallery { position: static; }
    .det-main-img { max-width: 100%; }
    .det-name { font-size: 1.55rem; }
    .det-price-main { font-size: 2rem; }
    .det-buy-card { padding: 20px; }
    .det-stack-block { padding: 20px; }
    .related-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .related-section { padding: 28px 14px 40px; }
}

@media (max-width: 640px) {
    .det-wrap { padding: 14px 12px; gap: 16px; }
    .det-name { font-size: 1.3rem; }
    .det-price-main { font-size: 1.75rem; }
    .det-cta { gap: 8px; }
    .det-btn-cart, .det-btn-buy { padding: 14px 12px; font-size: 0.82rem; min-width: 110px; }
    .det-buy-card { padding: 16px; }
    .det-stack-block { padding: 16px; }
    .related-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .related-section { padding: 20px 12px 32px; }
    .spec-table td { padding: 10px 12px; font-size: 0.78rem; }
    .det-subhead { font-size: 1.05rem; margin-bottom: 14px; }
    .det-buy-more-item { padding: 10px 6px; font-size: 0.78rem; }
    .related-section h2 { font-size: 1.3rem; }
}