:root{--ink:#111827;--muted:#667085;--line:#e5e7eb;--paper:#fff;--soft:#f7f8fa;--accent:#b91c1c;--dark:#0f172a}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);line-height:1.55}.container{width:min(1120px,92%);margin:auto}.site-header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px 0}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;letter-spacing:.05em}.brand-mark{display:grid;place-items:center;width:42px;height:42px;background:var(--dark);color:#fff;border-radius:8px}.nav nav{display:flex;gap:18px;flex-wrap:wrap}.nav nav a{color:var(--ink);text-decoration:none;font-weight:600}.section{padding:64px 0}.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.14em;color:var(--accent)}h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.05;margin:.3em 0}.lead{font-size:1.12rem;color:var(--muted);max-width:760px}.category-title{margin-top:44px;padding-top:24px;border-top:1px solid var(--line)}.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:24px 0 42px}.product-card{border:1px solid var(--line);border-radius:14px;padding:22px;background:#fff;display:flex;flex-direction:column;min-height:250px}.product-card h2,.product-card h3{margin:.25em 0}.product-card p{color:var(--muted)}.product-card .price{font-size:1.35rem;color:var(--ink);font-weight:800;margin-top:auto}.tag{display:inline-block;width:max-content;background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:4px 9px;font-size:.75rem;font-weight:700}.btn{display:inline-block;border:0;border-radius:9px;background:var(--dark);color:#fff;text-decoration:none;font-weight:700;padding:12px 16px;margin-top:12px;cursor:pointer}.btn.secondary{background:#fff;color:var(--dark);border:1px solid var(--line)}.btn[disabled]{opacity:.55;cursor:not-allowed}.notice{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:18px;margin:26px 0}.checkout-box{background:var(--dark);color:#fff;border-radius:16px;padding:26px;margin-top:42px}.checkout-box p{color:#d1d5db}.checkout-box code{background:#1f2937;padding:2px 5px;border-radius:4px}.footer{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:.9rem}@media(max-width:800px){.product-grid{grid-template-columns:1fr}.nav{align-items:flex-start;flex-direction:column}.section{padding:40px 0}}