:root {
  --bg: #f7f8fa; --surface: #fff; --text: #14161a; --muted: #6b7280; --line: #e5e7eb;
  --accent: #4f46e5; --accent-2: #7c3aed; --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e1013; --surface: #171a1f; --text: #f1f3f5; --muted: #9aa3af; --line: #272b33; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }
main, .site-header, .cats, .site-footer { max-width: 1160px; margin: 0 auto; padding-inline: 20px; }
.site-header { display: flex; align-items: center; gap: 16px; padding-block: 16px; }
.logo { font-weight: 800; font-size: 1.6rem; letter-spacing: -.03em; }
.logo span { color: var(--accent); }
.search { flex: 1; }
.search input { width: 100%; padding: 10px 16px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; }
.cart-link { font-weight: 600; padding: 8px 14px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); }
.cart-link span { background: var(--accent); color: #fff; border-radius: 999px; padding: 1px 8px; font-size: .8rem; margin-left: 4px; }
.cats { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 12px; }
.cats a { padding: 6px 14px; border-radius: 999px; white-space: nowrap; color: var(--muted); font-weight: 500; }
.cats a:hover { background: var(--surface); color: var(--text); }
.hero { margin: 12px 0 36px; padding: 56px 32px; border-radius: 24px; color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.1; margin: 0 0 12px; letter-spacing: -.03em; }
.hero p { margin: 0 0 24px; opacity: .9; max-width: 46ch; }
.hero .btn { background: #fff; color: var(--accent); }
.btn { display: inline-block; border: 0; cursor: pointer; font: inherit; font-weight: 600; padding: 12px 22px; border-radius: 999px; background: var(--accent); color: #fff; transition: transform .1s, opacity .15s; }
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.btn.small { padding: 7px 16px; font-size: .9rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: box-shadow .2s, transform .2s; }
.card:hover { box-shadow: 0 10px 30px rgba(0,0,0,.08); transform: translateY(-2px); }
.card-img { display: grid; place-items: center; height: 170px; font-size: 4rem; background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }
.card-body { padding: 16px; }
.brand { font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.card h3 { margin: 4px 0 14px; font-size: 1rem; }
.card-foot { display: flex; justify-content: space-between; align-items: center; }
.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding-block: 24px; }
.detail-img { display: grid; place-items: center; font-size: 9rem; min-height: 340px; border-radius: 24px; background: color-mix(in srgb, var(--accent) 8%, var(--surface)); border: 1px solid var(--line); }
.detail h1 { margin: 6px 0; font-size: 2rem; letter-spacing: -.02em; }
.price { font-size: 1.8rem; font-weight: 700; margin: 8px 0; }
.muted { color: var(--muted); }
.cart { max-width: 760px; margin: 0 auto; padding-block: 16px; }
.cart-table { width: 100%; border-collapse: collapse; }
.cart-table td { padding: 12px 8px; border-bottom: 1px solid var(--line); }
.cart-table input { width: 64px; padding: 6px; border-radius: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--text); }
.total { text-align: right; font-size: 1.2rem; }
.link { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; }
#checkout-form { display: grid; gap: 14px; }
#checkout-form label { display: grid; gap: 4px; font-weight: 500; }
#checkout-form input, #checkout-form textarea { padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; }
.success { padding: 18px; border-radius: var(--radius); background: color-mix(in srgb, #16a34a 14%, var(--surface)); border: 1px solid #16a34a; }
.site-footer { padding-block: 40px; color: var(--muted); text-align: center; }
.center { text-align: center; padding-block: 80px; }
@media (max-width: 720px) { .detail { grid-template-columns: 1fr; } .hero { padding: 36px 22px; } }