body {
  background: var(--background-color);
  color: var(--text-color);
  min-height: 100vh;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
.error-message {
  color: red;
  margin-top: 10px;
  font-size: 0.95em;
}

/* Mobile Responsive - Global */
@media (max-width: 768px) {
  .product-card {
    width: calc(50% - 0.75rem);
    min-width: 140px;
  }

  .products-list {
    gap: 1rem;
  }

  .product-section h2 {
    font-size: 1.3rem;
  }

  main {
    padding: 1rem !important;
  }
}

@media (max-width: 480px) {
  .product-card {
    width: 100%;
  }

  .product-card img {
    height: 150px;
  }

  .product-card h3 {
    font-size: 0.9rem;
  }

  .product-card .price {
    font-size: 1rem;
  }
}