:root {
  color-scheme: dark;
  --bg: #0a0a0a;
  --fg: #f5f5f5;
  --muted: #999;
  --accent: #e2e2e2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Helvetica Neue", Arial, sans-serif;
}

header {
  padding: 2rem 1.5rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

header p {
  color: var(--muted);
  margin-top: 0.5rem;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.product {
  background: #141414;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #262626;
}

.product img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.placeholder-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  background: #1a1a1a;
  font-size: 0.9rem;
}

.product-body {
  padding: 1.25rem;
}

.product-body h2 {
  font-size: 1.1rem;
  margin: 0 0 0.25rem;
}

.price {
  color: var(--muted);
  margin: 0 0 1rem;
}

.controls {
  display: flex;
  gap: 0.75rem;
}

select {
  flex: 1;
  padding: 0.6rem;
  background: #1f1f1f;
  color: var(--fg);
  border: 1px solid #333;
  border-radius: 8px;
}

button {
  padding: 0.6rem 1.25rem;
  background: var(--accent);
  color: #111;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.error {
  color: #ff6b6b;
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

footer {
  text-align: center;
  color: var(--muted);
  padding-bottom: 3rem;
  font-size: 0.85rem;
}