:root{
  --product-bg:#f4f4f2;
  --product-ink:#101114;
  --product-muted:#6d7178;
  --product-line:#d9dbde;
  --product-dark:#080a0d;
  --product-blue:#0b63e5;
}
.product-page{background:var(--product-bg);color:var(--product-ink);padding-top:92px;}
.product-shell{width:min(calc(100% - 72px),1500px);margin:0 auto;padding:72px 0 110px;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(380px,.8fr);gap:72px;align-items:start;}
.product-gallery{min-width:0;position:sticky;top:116px;}
.product-main-media{position:relative;background:#e8e8e6;overflow:hidden;aspect-ratio:1/1;}
.product-main-media img{display:block;width:100%;height:100%;object-fit:contain;background:#fff;transition:opacity .18s ease;}
.gallery-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:2;width:52px;height:52px;border:1px solid rgba(255,255,255,.45);border-radius:50%;background:rgba(5,8,12,.62);color:#fff;font-size:34px;line-height:1;cursor:pointer;backdrop-filter:blur(8px);}
.gallery-arrow-prev{left:18px}.gallery-arrow-next{right:18px}
.gallery-counter{position:absolute;right:18px;bottom:16px;padding:8px 12px;background:rgba(5,8,12,.72);color:#fff;font-size:12px;letter-spacing:.12em;}
.product-thumbs{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;margin-top:12px;}
.product-thumb{padding:0;border:1px solid transparent;background:#fff;aspect-ratio:1/1;overflow:hidden;cursor:pointer;opacity:.58;transition:.2s ease;}
.product-thumb img{display:block;width:100%;height:100%;object-fit:cover;}
.product-thumb:hover,.product-thumb.is-active{opacity:1;border-color:#111;}

.product-info{padding-top:12px;}
.product-kicker{margin:0 0 16px;color:var(--product-blue);font-size:12px;font-weight:800;letter-spacing:.26em;}
.product-info h1{margin:0;font-size:clamp(42px,5vw,72px);line-height:.98;letter-spacing:-.035em;font-weight:800;}
.product-price{margin:24px 0 0;font-size:28px;font-weight:700;letter-spacing:.02em;}
.product-price span{font-size:13px;font-weight:500;color:var(--product-muted);}
.product-lead{margin:30px 0 38px;color:#3f4349;font-size:15px;line-height:2;}

.option-block{padding:24px 0;border-top:1px solid var(--product-line);}
.option-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;font-size:12px;letter-spacing:.14em;}
.option-head span{font-weight:800}.option-head strong{font-size:11px;color:var(--product-muted);}
.option-buttons{display:flex;flex-wrap:wrap;gap:10px}
.option-btn{min-width:92px;height:46px;padding:0 18px;border:1px solid #cfd2d5;background:transparent;color:#111;font:inherit;font-size:12px;font-weight:700;letter-spacing:.08em;cursor:pointer;}
.option-btn:hover,.option-btn.is-selected{border-color:#111;background:#111;color:#fff;}
.size-buttons .option-btn{min-width:58px;}

.buy-button{width:100%;min-height:64px;margin-top:8px;padding:0 22px;border:0;background:#0b61d8;color:#fff;display:flex;justify-content:space-between;align-items:center;font:inherit;font-weight:800;letter-spacing:.06em;cursor:pointer;}
.buy-button:disabled{background:#aeb3ba;cursor:not-allowed;}
.buy-note{margin:10px 0 0;color:#8a8e94;font-size:11px;line-height:1.7;}

.product-accordion{margin-top:34px;border-top:1px solid var(--product-line);}
.product-accordion details{border-bottom:1px solid var(--product-line);}
.product-accordion summary{list-style:none;padding:22px 0;font-size:12px;font-weight:800;letter-spacing:.16em;cursor:pointer;}
.product-accordion summary::-webkit-details-marker{display:none}
.product-accordion summary::after{content:'+';float:right;font-size:18px;font-weight:400}
.product-accordion details[open] summary::after{content:'−'}
.detail-copy{padding:0 0 26px;color:#555b63;font-size:13px;line-height:1.9}
.detail-copy p{margin-top:0}
.detail-copy dl{margin:18px 0 0}
.detail-copy dl div{display:grid;grid-template-columns:90px 1fr;padding:8px 0;border-top:1px solid #e4e5e7}
.detail-copy dt{font-weight:700;color:#222}
.detail-copy dd{margin:0}
.size-table-wrap{overflow-x:auto;padding-bottom:24px}
.size-table{width:100%;border-collapse:collapse;font-size:12px}
.size-table th,.size-table td{padding:10px;border-bottom:1px solid #e2e4e6;text-align:center}
.size-table th{font-weight:700;}

.product-story{background:var(--product-dark);color:#fff;padding:110px 36px 120px;text-align:center}
.story-kicker{margin:0 0 18px;color:#b8c8e8;font-size:11px;font-weight:800;letter-spacing:.28em}
.product-story h2{margin:0;font-size:clamp(36px,5vw,64px);letter-spacing:.03em}
.product-story>p:last-child{max-width:680px;margin:24px auto 0;color:rgba(255,255,255,.72);font-size:14px;line-height:2;}

@media(max-width:980px){
  .product-page{padding-top:76px}
  .product-shell{width:min(calc(100% - 36px),760px);padding:34px 0 80px;grid-template-columns:1fr;gap:42px}
  .product-gallery{position:static}
  .product-thumbs{grid-template-columns:repeat(7,72px);overflow-x:auto;padding-bottom:4px}
  .product-thumb{width:72px}
  .product-info{padding-top:0}
  .product-info h1{font-size:46px}
  .gallery-arrow{width:44px;height:44px;font-size:28px}
  .product-story{padding:80px 22px 90px}
}
@media(max-width:560px){
  .product-shell{width:calc(100% - 24px)}
  .product-main-media{aspect-ratio:1/1.08}
  .product-info h1{font-size:40px}
  .product-price{font-size:24px}
  .product-lead{font-size:14px}
  .option-btn{min-width:calc(50% - 5px)}
  .size-buttons .option-btn{min-width:calc(25% - 8px)}
  .gallery-arrow-prev{left:10px}.gallery-arrow-next{right:10px}
  .gallery-counter{right:10px;bottom:10px}
}