.product-detail{display:grid;grid-template-columns:280px minmax(0,1fr);gap:48px;align-items:start}.product-sidebar{position:sticky;top:125px}.product-sidebar>img{width:100%;height:230px;object-fit:contain;border:1px solid var(--line);border-radius:6px;padding:20px;margin-bottom:30px}.product-sidebar h2{font-size:24px;line-height:1.2;letter-spacing:-.03em}.product-sidebar p{color:var(--muted);font-size:15px}.product-sidebar .button{width:100%;font-size:14px;padding:12px}.back-products{display:block;margin-top:25px;font-size:14px;color:var(--muted)}.sheet-viewer{border:1px solid var(--line);border-radius:7px;overflow:hidden;background:#f3f7f9}.sheet-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 20px;background:var(--navy);color:#fff}.sheet-controls{display:flex;align-items:center;gap:15px}.sheet-controls span{font-size:14px;min-width:50px;text-align:center}.sheet-controls button{background:transparent;border:1px solid #ffffff5a;color:#fff;border-radius:4px;width:36px;height:36px;font-size:20px;cursor:pointer}.sheet-controls button:disabled{opacity:.3;cursor:default}.sheet-image{width:100%;height:auto;object-fit:contain;background:white}.sheet-bottom{padding:17px 20px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:14px;color:#007b80}.sheet-bottom a{text-decoration:underline;text-underline-offset:4px}@media(max-width:800px){.product-detail{grid-template-columns:1fr;gap:30px}.product-sidebar{position:static}.product-sidebar>img{height:180px;width:220px;float:left;margin:0 25px 15px 0}.product-sidebar .button{width:auto}.sheet-toolbar{padding:12px;font-size:14px}.sheet-controls{gap:8px}.sheet-bottom{padding:15px}.back-products{clear:both}}@media(max-width:450px){.product-sidebar>img{float:none;width:100%;height:190px;margin-bottom:22px}.sheet-toolbar{align-items:flex-start}.sheet-controls{flex-shrink:0}}