:root{--ink: #111111;--muted: #767676;--line: #e5e5e5;--bg: #ffffff;--bg-soft: #f7f7f5;--accent: #111111;--ok: #1a7f37;--warn: #b54708;--err: #b42318}*{box-sizing:border-box}body{margin:0;font-family:Helvetica Neue,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}a{color:inherit}.shell{max-width:1080px;margin:0 auto;padding:0 24px}header.top{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:10}header.top .shell{display:flex;align-items:center;gap:32px;height:64px}.logo{font-weight:700;letter-spacing:.16em;font-size:18px;text-transform:lowercase;text-decoration:none}.logo span{color:var(--muted);font-weight:400;letter-spacing:.3em;font-size:10px;display:block;text-transform:uppercase}nav.main{display:flex;gap:20px;margin-left:auto}nav.main a{text-decoration:none;font-size:14px;color:var(--muted);padding:6px 2px}nav.main a.active,nav.main a:hover{color:var(--ink)}.cart-badge{background:var(--ink);color:#fff;border-radius:999px;font-size:11px;padding:1px 7px;margin-left:4px}main{padding:40px 0 80px}h1{font-size:28px;font-weight:600;margin:0 0 8px}h2{font-size:18px;font-weight:600;margin:32px 0 12px}p.lead{color:var(--muted);margin:0 0 32px;font-size:15px}.card{border:1px solid var(--line);border-radius:10px;padding:24px;background:var(--bg)}.grid{display:grid;gap:20px}.grid.products{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.grid.products{grid-template-columns:repeat(auto-fill,minmax(460px,1fr))}.product-card{padding:0;overflow:hidden;transition:box-shadow .15s ease}.product-card:hover{box-shadow:0 4px 24px #00000012}.product-img{height:260px;background:var(--bg-soft);overflow:hidden;padding:16px;display:flex;align-items:center;justify-content:center}.product-img img{max-width:100%;max-height:100%;object-fit:contain;display:block}.product-body{padding:20px 24px 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var(--line);border-radius:12px;height:420px;display:flex;align-items:center;justify-content:center;padding:24px}.detail-img img{max-width:100%;max-height:100%;object-fit:contain}.detail-thumbs{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}.thumb-btn{padding:0;width:56px;height:56px;border:1px solid var(--line);border-radius:8px;background:var(--bg-soft);overflow:hidden;cursor:pointer}.thumb-btn img{width:100%;height:100%;object-fit:cover;display:block}.thumb-btn.active{border-color:var(--ink)}.tier-table{border-collapse:collapse;margin:4px 0 20px;font-size:13px}.tier-table th,.tier-table td{border:1px solid var(--line);padding:6px 12px;text-align:center}.tier-table th{background:var(--bg-soft);font-weight:600;color:var(--muted)}.detail-desc{max-width:760px;margin-top:48px;font-size:15px;line-height:1.65}.detail-desc p{margin:0 0 12px}.tier-strip{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:0 0 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#11111122;border-color:var(--ink)}label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px}label .req{color:var(--err)}button{font-family:inherit;font-size:14px;padding:10px 18px;border-radius:8px;border:1px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer}button.secondary{background:#fff;color:var(--ink)}button.small{padding:5px 10px;font-size:13px}button:disabled{opacity:.45;cursor:not-allowed}.qty{display:inline-flex;align-items:center;gap:6px}.qty input{width:64px;text-align:center;padding:6px}.msg{padding:12px 16px;border-radius:8px;font-size:14px;margin:16px 0}.msg.error{background:#fef3f2;color:var(--err);border:1px solid #f9dbd9}.msg.ok{background:#f0f9f1;color:var(--ok);border:1px solid #d3ecd8}.msg.info{background:var(--bg-soft);color:var(--ink);border:1px solid var(--line)}.split{display:grid;grid-template-columns:1fr 1fr;gap:16px}.right{text-align:right}.muted{color:var(--muted)}.total-row{display:flex;justify-content:space-between;padding:6px 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