/* Tablet: 8-col editorial recomposition. */
@media (max-width: 1100px) {
  :root {
    --ro-page-pad: 32px;
    --ro-gutter: 20px;
    --ro-section-space: clamp(80px, 9vw, 120px);
  }

  .ro-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .foundation-placeholder__content {
    grid-column: 1 / span 6;
  }

  .foundation-system-preview__grid {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 0.65fr);
  }

  .site-header__inner {
    min-height: 80px;
  }

  .site-nav__list {
    gap: 18px;
  }
}

/* Navigation collapse. */
@media (max-width: 860px) {
  .site-header__inner {
    min-height: 72px;
  }

  .site-nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .site-nav {
    display: none;
    position: absolute;
    inset: 72px 0 auto;
    padding: var(--ro-space-6) var(--ro-page-pad) var(--ro-space-7);
    border-bottom: 1px solid var(--ro-color-line);
    background: var(--ro-color-paper);
    box-shadow: 0 18px 36px rgb(28 26 23 / 8%);
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav__list {
    align-items: stretch;
    flex-direction: column;
    gap: 0;
  }

  .site-nav a {
    width: 100%;
    min-height: 52px;
    justify-content: space-between;
    border-bottom: 1px solid var(--ro-color-line);
    font-family: var(--ro-font-display);
    font-size: 1.35rem;
    font-weight: 400;
    letter-spacing: 0;
    text-transform: none;
  }

  .site-nav a::after {
    display: none;
  }
}

/* Mobile: 4-col editorial recomposition. */
@media (max-width: 640px) {
  :root {
    --ro-page-pad: 20px;
    --ro-gutter: 16px;
    --ro-section-space: 72px;
    --ro-section-space-compact: 56px;
  }

  .ro-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .foundation-placeholder {
    padding-block: 72px 88px;
  }

  .foundation-placeholder__content,
  .foundation-system-preview {
    grid-column: 1 / -1;
  }

  .foundation-system-preview {
    margin-top: var(--ro-space-8);
  }

  .foundation-system-preview__grid {
    grid-template-columns: 1fr;
    gap: var(--ro-space-7);
  }

  .ro-display,
  .foundation-placeholder__title {
    font-size: clamp(2.75rem, 14vw, 4.5rem);
    max-width: 12ch;
  }

  .ro-heading-section {
    font-size: clamp(2rem, 10vw, 3.1rem);
  }

  .ro-cta {
    min-height: 48px;
  }

  .site-header__inner {
    min-height: 68px;
  }

  .site-brand {
    font-size: 1.2rem;
  }

  .site-nav {
    inset-block-start: 68px;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: var(--ro-space-7);
  }

  .site-footer__menu {
    grid-template-columns: 1fr;
    gap: var(--ro-space-3);
  }

  .site-footer__meta {
    margin-top: 0;
  }
}