:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --fg: #111;
  --muted: #555;
  --card-bg: #fff;
  --border: rgba(0, 0, 0, 0.08);
  --accent: #0e6dff;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

header {
  background: var(--fg);
  color: #fff;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.01em;
}

header .badge {
  font-size: 12px;
  background: rgba(255, 255, 255, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 500;
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

h1 {
  font-size: 28px;
  margin: 12px 0 4px;
}

.lede {
  color: var(--muted);
  margin: 0 0 24px;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.card .thumb {
  aspect-ratio: 4 / 3;
  width: 100%;
  display: block;
  position: relative;
}

.thumb,
.product .hero {
  position: relative;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(28px, 6vw, 56px);
  letter-spacing: -0.02em;
}

.thumb-1 { background: linear-gradient(135deg, #ff7e5f, #feb47b); }
.thumb-2 { background: linear-gradient(135deg, #6a11cb, #2575fc); }
.thumb-3 { background: linear-gradient(135deg, #11998e, #38ef7d); }
.thumb-4 { background: linear-gradient(135deg, #232526, #414345); }
.thumb-5 { background: linear-gradient(135deg, #c33764, #1d2671); }
.thumb-6 { background: linear-gradient(135deg, #ee0979, #ff6a00); }
.thumb-7 { background: linear-gradient(135deg, #00c6ff, #0072ff); }
.thumb-8 { background: linear-gradient(135deg, #f7971e, #ffd200); }

.card .meta {
  padding: 12px 14px 14px;
}

.card .title {
  font-weight: 600;
  margin: 0 0 4px;
  font-size: 15px;
}

.card .subtitle {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.card .price {
  margin-top: 8px;
  font-weight: 600;
  font-size: 14px;
}

.product {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.product .hero {
  aspect-ratio: 4 / 3;
  border-radius: 16px;
  width: 100%;
}

.product h1 {
  margin-top: 0;
}

.product .price-tag {
  font-size: 22px;
  font-weight: 600;
  margin: 4px 0 16px;
}

.product .description {
  color: var(--muted);
  margin: 0 0 16px;
}

.product .specs {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  border-top: 1px solid var(--border);
}

.product .specs li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-size: 14px;
}

.product .specs li span:first-child {
  color: var(--muted);
}

.buy {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
}

.back {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.back:hover {
  color: var(--fg);
}

@media (max-width: 720px) {
  .product {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}