body {
  font-family: 'Segoe UI', Arial, sans-serif;
  margin: 0;
  background: #f7f8fa;
  color: #222;
}
header {
  background: #fff;
  box-shadow: 0 2px 8px #0001;
  padding: 24px 0 12px 0;
  text-align: center;
}
header a {
  position: absolute;
  left: 24px;
  top: 24px;
  text-decoration: none;
  color: #007bff;
  font-size: 1rem;
}
main {
  max-width: 1100px;
  margin: 32px auto;
  padding: 0 16px;
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}
.product-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 12px #0002;
  padding: 24px 16px 16px 16px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}
.product-card:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 8px 24px #0003;
}
.product-card img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 12px;
}
.product-card h2 {
  font-size: 1.2rem;
  margin: 8px 0 4px 0;
}
.product-card p {
  font-size: 1rem;
  color: #555;
  min-height: 48px;
}
.buy-btn {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 24px;
  background: #007bff;
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.2s;
}
.buy-btn:hover {
  background: #0056b3;
}
.product-detail {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 12px #0002;
  padding: 32px 24px;
  text-align: center;
  margin-bottom: 32px;
}
.product-detail img {
  width: 120px;
  height: 120px;
  object-fit: contain;
  margin-bottom: 16px;
}
.payment-section {
  background: #e3f0ff;
  border-radius: 12px;
  padding: 24px 16px;
  text-align: center;
}
footer {
  text-align: center;
  padding: 24px 0 12px 0;
  color: #888;
  background: #fff;
  margin-top: 48px;
  font-size: 0.95rem;
}
@media (max-width: 600px) {
  .product-card, .product-detail, .payment-section {
    padding: 16px 6px;
  }
  .product-card img, .product-detail img {
    width: 60px;
    height: 60px;
  }
}