:root { --page-background: #fff; }

/* Unify content bands, without changing image backgrounds or control states. */
body.reference-site,
.reference-site main,
.reference-site :is(
  .section,
  .page-hero,
  .ref-about,
  .ref-applications,
  .ref-clients,
  .company-intro,
  .company-capabilities,
  .company-engineering,
  .company-quality,
  .company-market,
  .company-service,
  .service-section,
  .service-contact,
  .products-catalog,
  .news-index-content,
  .news-article-header,
  .contact-details,
  .site-loader-panel
) {
  background-color: var(--page-background);
}

/* This is a decorative gradient, not a photographic background. */
.reference-site .products-catalog { background-image: none; }