@layer sections {
  /* 00. Shared page chrome. Header sizing is observed by site.js for anchors. */
  .site-header {
    --header-font: var(--font-body);
    --header-text-size: var(--text-sm);
    --header-text-weight: 500;
    --header-item-height: calc(var(--brand-logo-height) / 2);
    --header-divider: var(--color-accent-soft);
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--color-surface);
    border-bottom: var(--border-width) solid var(--color-border);
    font: var(--header-text-weight) var(--header-text-size) / 1.4 var(--header-font);
  }
  .site-header__utility {
    background: var(--color-surface-blue);
    font-family: var(--font-mono);
  }
  .site-header__utility-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-1) var(--space-4);
    min-height: 34px;
    padding-block: var(--space-2);
    color: var(--color-muted);
    font: inherit;
  }
  .site-header__utility a {
    text-decoration: none;
  }
  .site-header__utility-contacts {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    white-space: nowrap;
  }
  .site-header__utility-project {
    display: none;
  }
  .site-header__main {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 0 var(--space-5);
    min-height: 88px;
    padding-block: var(--space-2);
  }
  .site-header__descriptor {
    grid-column: 2;
    grid-row: 1;
    color: var(--color-primary);
    font: inherit;
  }
  .brand {
    --brand-image-width: 116px;
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
    gap: var(--space-4);
    text-decoration: none;
  }
  .brand__image {
    width: var(--brand-image-width);
    height: auto;
    border-radius: var(--radius-sm);
  }
  .brand__description {
    color: var(--color-muted);
    font-size: var(--text-xs);
    font-weight: 500;
    line-height: 1.5;
  }
  .brand--header {
    --brand-image-width: 152px;
    margin: 0;
  }
  .site-header__main > .brand--header {
    grid-column: 1;
    grid-row: 1 / 3;
  }
  .site-nav {
    display: flex;
    align-items: center;
    grid-column: 2;
    grid-row: 2;
    justify-self: start;
    min-width: 0;
  }
  .site-nav__list {
    display: flex;
    align-items: center;
    gap: 0;
  }
  .site-nav__list > li {
    display: flex;
    align-items: center;
  }
  /* One segmented treatment for navigation, languages and the project link.
     Only vertical dividers; blue states must preserve the light-blue edges. */
  .site-nav__link,
  .language-switcher__item {
    display: inline-flex;
    align-items: center;
    min-height: var(--header-item-height);
    padding: var(--space-1) var(--space-4);
    border: 0;
    border-inline: var(--border-width) solid var(--header-divider);
    border-radius: 0;
    background: var(--color-surface-blue);
    color: var(--color-primary);
    font: inherit;
    text-decoration: none;
    white-space: nowrap;
  }
  .site-nav__list > li:not(:last-child) > .site-nav__link,
  .language-switcher__item:not(:last-child) {
    border-inline-end-width: 0;
  }
  .site-nav__link:hover {
    color: var(--color-white);
    background: var(--color-primary);
  }
  .site-nav__link:focus-visible,
  .site-nav__link[aria-current="location"] {
    color: var(--color-white);
    background: var(--color-primary);
  }
  .site-header__project {
    grid-column: 3;
    grid-row: 2;
    justify-self: end;
    justify-content: center;
    color: var(--color-white);
    background: var(--color-primary);
  }
  .site-header__project:hover,
  .site-header__project:focus-visible {
    background: var(--color-primary-hover);
  }
  .language-switcher {
    --header-item-height: calc(var(--brand-logo-height) / 2);
    --header-divider: var(--color-accent-soft);
    display: inline-flex;
    align-items: center;
    gap: 0;
  }
  .site-header__main > .language-switcher {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
  }
  .language-switcher__item {
    justify-content: center;
    min-height: calc(var(--header-item-height) * 0.7);
    padding-block: 0;
    background: var(--color-white);
  }
  .language-switcher__item[aria-current="page"] {
    color: var(--color-primary);
    background: var(--color-surface-blue);
  }
  .language-switcher__item:disabled {
    cursor: default;
  }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 44px;
    min-width: 44px;
    justify-content: center;
    padding: var(--space-2) var(--space-3);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-primary);
    font: inherit;
  }
  .menu-toggle[aria-expanded="true"] {
    background: var(--color-surface-tint);
    border-color: var(--color-accent);
  }
  .menu-toggle__glyph {
    position: relative;
    display: block;
    width: 22px;
    height: 18px;
  }
  .menu-toggle__glyph > span {
    position: absolute;
    inset-inline: 0;
    top: 8px;
    height: 2px;
    border-radius: 1px;
    background: currentColor;
    transition: transform var(--duration-fast) var(--ease-standard), opacity var(--duration-fast);
  }
  .menu-toggle__glyph > span:first-child {
    transform: translateY(-7px);
  }
  .menu-toggle__glyph > span:last-child {
    transform: translateY(7px);
  }
  .menu-toggle[aria-expanded="true"] .menu-toggle__glyph > span:first-child {
    transform: rotate(45deg);
  }
  .menu-toggle[aria-expanded="true"] .menu-toggle__glyph > span:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle[aria-expanded="true"] .menu-toggle__glyph > span:last-child {
    transform: rotate(-45deg);
  }

  /* 01. Hero: two-thirds introduction/fields + one-third project requirements. */
  .hero {
    --color-primary: var(--color-primary-deep);
    padding-block: var(--space-7) var(--space-8);
    background: var(--background-blue-fade), var(--color-white);
  }
  .hero__eyebrow {
    margin-bottom: var(--space-5);
    font-size: var(--text-label);
    font-weight: 600;
    line-height: 1.45;
    box-shadow: var(--shadow-card);
  }
  .hero .display {
    color: var(--color-heading-accent);
    font-size: var(--text-heading-xl);
    font-weight: 600;
    line-height: 1.2;
  }
  .hero__grid {
    display: grid;
    gap: var(--space-6);
  }
  .hero__grid > * {
    min-width: 0;
  }
  .hero__main {
    display: grid;
    grid-template-rows: auto 1fr;
    gap: var(--space-6);
  }
  .hero__highlights {
    margin-top: var(--space-7);
  }
  .hero__description {
    margin-top: var(--space-3);
    color: var(--color-text);
    font-size: var(--text-base);
    line-height: var(--line-body);
  }
  .hero__expertise {
    display: grid;
    gap: var(--space-6) var(--space-5);
  }
  .insulation-field {
    display: grid;
    grid-template-rows: auto auto 1fr;
    align-content: start;
    gap: var(--space-4);
    min-width: 0;
    padding: var(--space-4);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-white);
    box-shadow: var(--shadow-card);
  }
  .insulation-field__heading {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-heading-sm);
    line-height: 1.4;
  }
  .insulation-field__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--color-surface-blue);
  }
  .insulation-field__icon .icon {
    width: 20px;
    height: 20px;
  }
  .insulation-field > p {
    font-size: var(--text-compact);
    line-height: 1.6;
  }
  .insulation-field__image {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-sm);
  }
  .requirements-panel {
    display: grid;
    align-content: start;
    align-self: stretch;
    gap: var(--space-5);
    padding: var(--space-6) var(--space-5);
    border-radius: var(--radius-md);
    background: var(--color-primary);
    color: var(--color-panel-text);
    box-shadow: var(--shadow-panel);
    font-size: var(--text-compact);
    line-height: 1.6;
  }
  .requirements-panel h2,
  .requirements-panel strong {
    color: var(--color-white);
  }
  .requirements-panel h2 {
    font-size: var(--text-heading-md);
    line-height: 1.3;
  }
  .requirements-panel__label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    padding: 0;
    color: var(--color-panel-accent);
    font-size: var(--text-label);
    font-weight: 600;
    line-height: 1.45;
  }
  .requirements-panel__label .icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
  }
  .requirements-panel__text {
    display: grid;
    gap: var(--space-5);
  }
  .requirements-panel__callout {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-3);
    border-radius: var(--radius-sm);
    background: var(--color-panel-tint);
  }
  .requirements-panel__callout > .icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--color-panel-accent);
  }

  /* 02. Detailed insulation section: copy and blue callout, image on the right. */
  .insulation-detail {
    background: var(--background-blue-fade), var(--color-white);
  }
  .insulation-detail__grid {
    display: grid;
    align-items: start;
    gap: var(--space-7);
  }
  .insulation-detail__grid > * {
    min-width: 0;
  }
  .insulation-detail__copy {
    display: grid;
    gap: var(--space-5);
  }
  .insulation-detail__title {
    color: var(--color-heading-accent);
  }
  .insulation-detail__note,
  .services__note {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-5);
    border-radius: var(--radius-md);
    background: var(--color-primary-deep);
    color: var(--color-white);
    box-shadow: var(--shadow-card);
  }
  .insulation-detail__note strong,
  .services__note strong {
    font-weight: 600;
  }
  .insulation-detail__note > .icon,
  .services__note > .icon {
    flex: 0 0 24px;
    margin-top: 1px;
    color: var(--color-panel-accent);
  }
  .insulation-detail__image {
    width: 90%;
    justify-self: center;
    align-self: center;
    height: auto;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
  }
  .insulation-detail__brands {
    margin-top: var(--space-7);
  }
  .insulation-detail__materials {
    margin-top: var(--space-5);
    color: var(--color-primary);
    font-weight: 600;
    text-align: center;
  }

  /* 04–06. Repeated material, service and application components. */
  .materials {
    background: var(--background-blue-fade), var(--color-white);
  }
  .materials .section-heading {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-5);
  }
  .materials .section-heading h2 {
    max-width: 100%;
    color: var(--color-heading-accent);
  }
  .materials .section-heading__description {
    justify-self: start;
    max-width: 76ch;
    color: var(--color-text);
    font-weight: 600;
  }
  .material-card,
  .service-card {
    border-color: var(--color-surface-blue);
  }
  .material-card__label,
  .service-card__heading {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--card-padding);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    background: var(--color-primary-deep);
    color: var(--color-white);
    font: 600 var(--text-lead) / 1.4 var(--font-heading);
    letter-spacing: var(--tracking-heading);
  }
  .material-card__label > .icon,
  .service-card__heading > .icon {
    color: var(--color-panel-accent);
  }
  .material-card .card__body > p,
  .service-card .card__body > p {
    color: var(--color-text);
  }
  .material-card .spec-list {
    margin-top: auto;
  }
  .material-card .spec-list > div {
    grid-template-columns: 1fr;
    gap: var(--space-1);
    padding-bottom: 0;
    border-color: var(--color-surface-blue);
  }
  .material-card .spec-list dt {
    color: var(--color-primary);
    font-weight: 600;
  }
  .material-card .spec-list dd {
    color: var(--color-text);
  }
  @media (min-width: 40rem) {
    .material-card__label,
    .service-card__heading {
      min-height: calc(2.8em + 2 * var(--space-3));
    }
  }
  .materials__additional {
    margin-top: var(--space-8);
    padding-top: var(--space-7);
    border-top: var(--border-width) solid var(--color-surface-blue);
  }
  .materials__additional-intro {
    max-width: 90ch;
    margin-bottom: var(--space-7);
  }
  .materials__additional-intro h3 {
    color: var(--color-heading-accent);
  }
  .material-offer__action {
    width: 100%;
    margin-top: auto;
    padding-top: var(--space-5);
    border-top: var(--border-width) solid var(--color-surface-blue);
  }
  .material-offer__summary {
    color: var(--color-primary);
    font-size: var(--text-sm);
  }
  .material-offer__action .button {
    width: 100%;
    justify-content: space-between;
    background: var(--color-primary-deep);
  }
  .material-offer__action .button .icon {
    color: var(--color-panel-accent);
  }
  @media (min-width: 40rem) {
    .material-offer .material-card__label {
      min-height: calc(4.2em + 2 * var(--space-3));
    }
    .material-offer__summary {
      min-height: calc(3em * var(--line-body));
    }
  }
  .services {
    background: var(--background-blue-fade), var(--color-white);
  }
  .services__intro {
    max-width: 100ch;
    margin-bottom: var(--space-7);
  }
  .services__intro h2 {
    color: var(--color-heading-accent);
  }
  .service-card__image {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-sm);
  }
  .services__note {
    margin-top: var(--space-7);
  }
  .application-card .technical-label {
    width: 100%;
    margin-top: auto;
    padding-top: var(--space-4);
    border-top: var(--border-width) solid var(--color-border);
  }

  .references {
    background: var(--background-blue-fade), var(--color-white);
  }
  .references__intro {
    max-width: 100ch;
    margin-bottom: var(--space-7);
  }
  .references__intro h2 {
    color: var(--color-heading-accent);
  }
  .reference-card {
    border-color: var(--color-surface-blue);
  }
  .reference-card__heading {
    padding: var(--space-5) var(--card-padding);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    background: var(--color-primary-deep);
  }
  .reference-card__heading h3 {
    color: var(--color-white);
  }
  .reference-card__location {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-panel-accent);
    font: 500 var(--text-xs) / 1.6 var(--font-mono);
  }
  .reference-card__location .icon {
    width: 16px;
    height: 16px;
  }
  .reference-card .card__body > p {
    color: var(--color-text);
  }
  .reference-card__figure {
    width: 100%;
  }
  .reference-card__image {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: var(--radius-sm);
  }

  /* Contact: shared form behaviour, site-specific layout and palette. */
  .contact {
    background: var(--background-blue-fade), var(--color-white);
  }
  .contact__grid {
    display: grid;
    align-items: start;
    gap: var(--space-7);
  }
  .contact__grid > * {
    min-width: 0;
  }
  .contact-info {
    width: 100%;
    border-radius: var(--radius-md);
    background: var(--color-primary-deep);
    color: var(--color-white);
  }
  .contact-info .contact-panel__heading {
    border-bottom: var(--border-width) solid var(--color-inverse-border);
  }
  .contact__address {
    width: 100%;
    padding: var(--space-5);
  }
  .contact__channels {
    display: grid;
    gap: var(--space-4);
    font-size: var(--text-sm);
  }
  .contact__channels > div {
    display: grid;
    grid-template-columns: 70px minmax(0, 1fr);
    gap: var(--space-3);
  }
  .contact__channels dt {
    color: var(--color-panel-accent);
  }
  .contact__channels a {
    font-weight: 600;
    text-decoration: none;
  }
  .contact__channels a:hover {
    text-decoration: underline;
  }
  .contact__phones {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-5);
  }
  .contact__phones a {
    white-space: nowrap;
  }
  .contact-map {
    width: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-surface-blue);
  }
  .contact-map__embed {
    min-height: 300px;
  }
  .contact-map__placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    min-height: 300px;
    padding: var(--space-5);
    text-align: center;
    font-size: var(--text-sm);
  }
  .contact-map__placeholder > .icon {
    width: 32px;
    height: 32px;
    color: var(--color-heading-accent);
  }
  .contact-map iframe {
    display: block;
    width: 100%;
    height: 300px;
    border: 0;
  }
  .contact-map__route {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-5);
    color: var(--color-primary);
    border-top: var(--border-width) solid var(--color-accent-soft);
    font-size: var(--text-sm);
    font-weight: 600;
  }
  .contact-panel {
    background: var(--color-surface-blue);
    border: var(--border-width) solid var(--color-surface-blue);
    border-radius: var(--radius-md);
  }
  .contact-panel__heading {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-5) var(--card-padding);
    background: var(--color-primary-deep);
    color: var(--color-white);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    font-size: var(--text-heading-sm);
  }
  .contact-panel__heading .icon {
    color: var(--color-panel-accent);
  }
  .contact-panel__body {
    padding: var(--card-padding);
  }
  .contact .contact-control:not([type="file"]):not([type="checkbox"]),
  .contact .contact-dropzone {
    border-radius: var(--radius-sm);
    font-weight: 400;
  }
  .contact .contact-submit {
    width: 100%;
    background: var(--color-primary-deep);
  }
  .contact .contact-submit:hover {
    background: var(--color-primary-hover);
  }
  @media (min-width: 56rem) {
    .contact__grid {
      grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    }
  }

  /* 08. Footer. */
  .site-footer {
    --color-focus: var(--color-white);
    background: var(--color-footer-background);
    color: var(--color-panel-text);
  }
  .site-footer__standards {
    background: var(--color-footer-standards);
    font: var(--text-xs) / 1.5 var(--font-mono);
  }
  .site-footer__standards-inner {
    display: grid;
    gap: var(--space-3);
    padding-block: var(--space-4);
  }
  .site-footer__standards-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-panel-text);
    font: 700 var(--text-label) / 1.5 var(--font-mono);
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }
  .site-footer__standards-title .icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--color-panel-accent);
  }
  .site-footer__standards-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-3);
  }
  .site-footer__standards-list li {
    padding: 2px var(--space-1);
    border-radius: 2px;
    background: var(--color-footer-tag);
    color: color-mix(in srgb, var(--color-panel-accent) 90%, var(--color-white));
  }
  .site-footer__bottom-band {
    border-top: var(--border-width) solid var(--color-panel-accent);
    background: var(--color-footer-bottom);
  }
  .site-footer__main {
    display: grid;
    align-items: start;
    gap: var(--space-7);
    padding-block: var(--space-8);
    font-size: var(--text-sm);
  }
  .site-footer .brand__description {
    color: var(--color-white);
    font-size: var(--text-sm);
    font-weight: 500;
  }
  .site-footer .brand--footer {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    margin: 0;
  }
  .brand--footer .brand__image {
    width: auto;
    height: var(--brand-logo-height);
    max-width: none;
  }
  .site-footer__intro {
    max-width: 39ch;
    color: var(--color-inverse-muted);
    line-height: 1.75;
  }
  .site-footer__column {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
    min-width: 0;
  }
  .site-footer__heading {
    margin: 0;
    padding-bottom: var(--space-3);
    border-bottom: var(--border-width) solid var(--color-inverse-border);
    color: var(--color-inverse-text);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 600;
    line-height: 1.5;
    letter-spacing: normal;
  }
  .site-footer__links {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }
  .site-footer__legal {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3) var(--space-5);
  }
  .site-footer__brand {
    gap: var(--space-5);
  }
  .site-footer__links a {
    display: inline-block;
    padding-block: 3px;
    color: var(--color-inverse-muted);
    text-decoration: none;
  }
  .site-footer__contacts {
    display: grid;
    gap: var(--space-3);
  }
  .site-footer__contact-row {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    text-decoration: none;
  }
  .site-footer__contact-row .icon {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    margin-top: 3px;
    color: var(--color-panel-accent);
  }
  .site-footer .language-switcher {
    align-self: flex-start;
    margin-top: var(--space-2);
    font: 500 var(--text-sm) / 1.4 var(--font-body);
  }
  .site-footer .language-switcher__item {
    min-width: 48px;
    min-height: 32px;
    padding: var(--space-1) var(--space-3);
    border-inline-color: var(--color-inverse-border);
    background: var(--color-panel-tint);
    color: var(--color-inverse-muted);
  }
  .site-footer .language-switcher__item[aria-current="page"] {
    background: var(--color-surface-blue);
    color: var(--color-primary);
  }
  .site-footer .language-switcher__item:focus-visible {
    outline-offset: 3px;
  }
  .site-footer a:not(.language-switcher__item):hover {
    color: var(--color-white);
    text-decoration: underline;
  }
  .site-footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding-block: var(--space-5);
    padding-bottom: var(--space-8);
    font: var(--text-xs) / 1.65 var(--font-mono);
  }
  .site-footer__bottom small {
    font: inherit;
  }
  .legal-page {
    background: var(--background-blue-fade), var(--color-white);
  }
  .legal-page__content {
    max-width: 960px;
  }
  .legal-page__content h1 {
    color: var(--color-heading-accent);
  }
  .legal-page__content h2 {
    margin-top: var(--space-5);
  }
  .legal-page__facts {
    width: 100%;
  }
  .legal-page__facts > div {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    gap: var(--space-2) var(--space-5);
    padding-block: var(--space-3);
    border-bottom: var(--border-width) solid var(--color-border);
  }
  .legal-page__facts dt {
    color: var(--color-muted);
  }
  .legal-page__facts dd {
    margin: 0;
    overflow-wrap: anywhere;
  }
  @media (max-width: 39.999rem) {
    .legal-page__facts > div {
      grid-template-columns: minmax(0, 1fr);
    }
  }
  .legal-page__notice {
    padding: var(--space-5);
    border-inline-start: 3px solid var(--color-heading-accent);
    background: var(--color-surface-blue);
  }
  .site-footer__bottom a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
  }

  /* Dev reference only, all samples themselves use the production components. */
  .design-sample {
    padding: var(--card-padding);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
  }
  .design-swatch {
    width: 100%;
    height: 88px;
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-sm);
  }
  .design-swatch--primary {
    background: var(--color-primary);
  }
  .design-swatch--accent {
    background: var(--color-accent);
  }
  .design-swatch--surface {
    background: var(--color-surface);
  }
  .design-swatch--soft {
    background: var(--color-surface-soft);
  }
  .design-swatch--tint {
    background: var(--color-surface-tint);
  }
  .design-swatch--highlight {
    background: var(--color-highlight);
  }
  .design-table-wrap {
    width: 100%;
    overflow-x: auto;
  }
  .design-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: var(--text-sm);
  }
  .design-table th,
  .design-table td {
    padding: var(--space-3);
    border-bottom: var(--border-width) solid var(--color-border);
  }
  .design-table th {
    color: var(--color-primary);
  }

  @media (min-width: 40rem) {
    .hero__expertise {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  }
  @media (min-width: 56rem) {
    .insulation-detail__grid {
      grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    }
    .insulation-detail__copy {
      width: 95%;
    }
    .site-footer__main {
      grid-template-columns: 1.2fr 0.8fr 1fr;
    }
  }
  @media (min-width: 64rem) {
    .hero__grid {
      grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    }
  }
  /* Keep this breakpoint in sync with site.js and the no-script fallback. */
  @media (min-width: 80rem) {
    .site-header__main {
      grid-template-rows: repeat(2, var(--header-item-height));
      align-content: center;
    }
    .brand--header .brand__image {
      /* The logo defines exactly two equal rows, with no gap between them. */
      height: calc(2 * var(--header-item-height));
      width: auto;
      max-width: none;
    }
    .site-header__descriptor {
      display: flex;
      align-items: center;
      height: var(--header-item-height);
      padding-inline: calc(var(--space-4) + var(--border-width));
      /* Match the menu's line box before the upper-row optical adjustment. */
    }
    .site-header__descriptor,
    .site-header__main > .language-switcher {
      /* Move only the upper row; preserve the logo and menu baseline. */
      transform: translateY(-4px);
    }
  }
  @media (max-width: 79.999rem) {
    .site-header {
      position: static;
    }
    .site-header[data-nav-ready] {
      position: sticky;
      box-shadow: var(--shadow-header);
    }
    .site-header__utility-inner {
      flex-wrap: nowrap;
      min-height: 32px;
      gap: var(--space-2);
      padding-block: 3px;
      font-size: var(--text-xs);
      line-height: 1.25;
    }
    .site-header__utility-inner > span {
      display: none;
    }
    .site-header__utility-contacts > a {
      display: inline-flex;
      align-items: center;
      min-height: 26px;
    }
    .site-header__utility-project {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      min-height: 26px;
      padding-inline: var(--space-2);
      border-inline: var(--border-width) solid var(--color-panel-accent);
      border-radius: 3px;
      background: var(--color-primary-deep);
      color: var(--color-white);
      font-family: var(--font-body);
      font-weight: 600;
    }
    .site-header__main {
      grid-template-columns: minmax(0, 1fr) auto auto;
      column-gap: var(--space-3);
      row-gap: 0;
      min-height: 54.4px;
      padding-block: 3px;
    }
    .brand {
      --brand-image-width: 96px;
      margin-block: var(--space-3);
    }
    .site-header__main > .brand--header {
      --brand-image-width: var(--brand-logo-compact-width);
      max-width: 100%;
      grid-column: 1;
      grid-row: 1;
      justify-self: start;
      margin: 0;
    }
    .brand--footer .brand__image {
      width: var(--brand-rendered-width, var(--brand-logo-compact-width));
      height: auto;
    }
    .site-header__descriptor {
      display: none;
    }
    .site-header__project {
      display: none;
    }
    .site-header__main > .language-switcher {
      grid-column: 2;
      grid-row: 1;
    }
    .menu-toggle {
      grid-column: 3;
      grid-row: 1;
      padding: var(--space-2);
      background: var(--color-surface-blue);
      border-color: var(--color-accent-soft);
      border-radius: 6px;
    }
    .menu-toggle__label {
      display: none;
    }
    .site-nav {
      /* Start compact, even while JS is loading. no-script.css restores the
         in-flow menu when scripting is disabled. */
      display: none;
      grid-column: 1 / -1;
      grid-row: 2;
      width: 100%;
      flex-direction: column;
      align-items: stretch;
      gap: var(--space-3);
      padding: var(--space-3) 0;
    }
    .site-nav__list {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: var(--space-2);
    }
    .site-nav__list > li > .site-nav__link {
      border: var(--border-width) solid var(--header-divider);
      border-radius: 6px;
      padding: var(--space-3);
    }
    .site-nav .site-nav__link {
      width: 100%;
      min-height: 48px;
      white-space: normal;
    }
    .site-header[data-nav-ready] .site-nav {
      display: flex;
      position: absolute;
      top: 100%;
      inset-inline: 0;
      max-height: calc(100dvh - var(--header-offset));
      overflow-y: auto;
      overscroll-behavior: contain;
      padding: var(--space-3) var(--page-gutter);
      background: var(--color-white);
      border-bottom: var(--border-width) solid var(--color-border);
      box-shadow: var(--shadow-header);
    }
  }
  /* Mobile content uses one consistent section-card frame. Desktop stays untouched. */
  @media (max-width: 55.999rem) {
    main {
      --card-padding: 12px;
      --grid-gap: 12px;
      padding: var(--space-3) var(--space-2);
      background: var(--color-surface-blue);
      font-size: var(--text-compact);
      line-height: 1.6;
    }
    main > .section {
      margin-bottom: var(--space-3);
      padding-block: var(--space-5);
      border: var(--border-width) solid var(--color-border);
      border-radius: 12px;
      background: var(--background-blue-fade), var(--color-white);
      box-shadow: var(--shadow-card);
    }
    main > .section:last-child {
      margin-bottom: 0;
    }
    main > .section > .container {
      width: calc(100% - 2 * var(--card-padding));
    }
    main .heading-xl {
      font-size: clamp(1.625rem, 5vw, 1.875rem);
      line-height: 1.2;
    }
    .hero__grid,
    .hero__main,
    .hero__expertise,
    .insulation-detail__grid,
    .contact__grid {
      gap: var(--space-5);
    }
    .insulation-detail__copy {
      gap: var(--space-4);
    }
    .insulation-field {
      padding: var(--card-padding);
      gap: var(--space-3);
    }
    .requirements-panel {
      padding: var(--space-5) var(--card-padding);
      gap: var(--space-4);
    }
    .requirements-panel__text {
      gap: var(--space-4);
    }
    .requirements-panel__callout,
    .insulation-detail__note,
    .services__note {
      padding: var(--space-4) var(--card-padding);
      gap: var(--space-2);
    }
    .insulation-detail__image {
      width: 100%;
    }
    .hero__eyebrow,
    .section-heading,
    .services__intro,
    .references__intro,
    .materials__additional-intro {
      margin-bottom: var(--space-5);
    }
    .hero__highlights,
    .insulation-detail__brands,
    .services__note {
      margin-top: var(--space-5);
    }
    .materials__additional {
      margin-top: var(--space-6);
      padding-top: var(--space-5);
    }
    .highlights-strip {
      gap: var(--space-2);
      padding: var(--space-2);
    }
    .highlights-strip__item {
      padding: var(--space-2);
    }
    .manufacturer-strip__item {
      grid-template-rows: 48px;
    }
    .manufacturer-strip__logo {
      height: 48px;
    }
    .insulation-detail__materials {
      margin-top: var(--space-4);
      font-size: var(--text-sm);
    }
    .contact__address,
    .contact-map__placeholder,
    .contact-map__route {
      padding-inline: var(--card-padding);
    }
    .contact-panel__heading,
    .reference-card__heading {
      padding-block: var(--space-4);
    }
    .contact__channels > div {
      grid-template-columns: 56px minmax(0, 1fr);
      gap: var(--space-2);
    }
    .contact__phones {
      flex-direction: column;
    }
    .contact-map__embed,
    .contact-map__placeholder {
      min-height: 240px;
    }
    .contact-map iframe {
      height: 240px;
    }
    .contact .contact-dropzone {
      padding: var(--space-4) var(--card-padding);
    }
  }
  @media (max-width: 39.999rem) {
    .hero .display {
      font-size: clamp(1.75rem, 7vw, 2rem);
    }
    .site-header {
      --page-gutter: 12px;
      --brand-logo-compact-width: 112px;
    }
    .site-header__utility-inner {
      font-size: var(--text-label);
      gap: var(--space-1);
    }
    .site-header__utility-contacts {
      gap: var(--space-1);
    }
    .site-header__main {
      column-gap: var(--space-2);
      min-height: 51px;
    }
    .site-nav__link,
    .language-switcher__item {
      padding-inline: var(--space-2);
    }
    .site-nav__list {
      grid-template-columns: minmax(0, 1fr);
    }
    .brand:not(.brand--header) {
      gap: var(--space-3);
    }
  }
  @media (prefers-reduced-motion: no-preference) {
    .site-nav__link {
      transition: background-color var(--duration-fast) var(--ease-standard),
        color var(--duration-fast) var(--ease-standard);
    }
  }
  @media (prefers-reduced-motion: reduce) {
    .menu-toggle__glyph > span {
      transition: none;
    }
  }
  @media print {
    .site-header {
      position: static;
    }
    .site-header__utility,
    .menu-toggle,
    .language-switcher,
    .site-nav,
    .site-header__project,
    .site-footer__bottom {
      display: none;
    }
    .section {
      padding-block: var(--space-6);
    }
    .card {
      break-inside: avoid;
    }
  }
}