* { box-sizing: border-box; }
body {
  font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  color: #1a1a1a;
  line-height: 1.5;
}
header { margin-bottom: 2rem; }
header h1 { margin-bottom: 0.25rem; }
header p { color: #555; margin-top: 0; }
h2 { font-size: 1.1rem; margin: 2rem 0 0.5rem; }
ul.product-list { list-style: none; padding: 0; }
ul.product-list li { margin-bottom: 0.4rem; }
ul.product-list a { color: #0a5cd6; text-decoration: none; }
ul.product-list a:hover { text-decoration: underline; }
.product-image-placeholder {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 4 / 3;
  background: #eee;
  border: 1px dashed #bbb;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 0.9rem;
  margin: 1rem 0;
}
.buy-button {
  display: inline-block;
  background: #ff9900;
  color: #111;
  font-weight: 600;
  padding: 0.7rem 1.4rem;
  border-radius: 4px;
  text-decoration: none;
  margin: 1rem 0;
}
.buy-button:hover { background: #e88a00; }
footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid #ddd;
  font-size: 0.8rem;
  color: #777;
}