@layer components {
  /* Summary strip: light-blue frame, white cells, decorative local icons. */
  .highlights-strip {
    display: grid;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: var(--color-surface-blue);
  }
  .highlights-strip__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    min-width: 0;
    padding: var(--space-3);
    border-radius: var(--radius-sm);
    background: var(--color-white);
  }
  .highlights-strip__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);
    color: var(--color-primary);
  }
  .highlights-strip__icon .icon {
    width: 20px;
    height: 20px;
  }
  .highlights-strip__content {
    min-width: 0;
  }
  .highlights-strip__title {
    color: var(--color-primary);
    font-size: var(--text-base);
    font-weight: 600;
    line-height: 1.5;
  }
  .highlights-strip__description {
    margin-top: var(--space-1);
    color: var(--color-text);
    font-size: var(--text-sm);
    line-height: 1.5;
  }
  @media (min-width: 40rem) {
    .highlights-strip {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  }
  @media (min-width: 64rem) {
    .highlights-strip {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }
  }

  /* Brand variant reuses the summary strip without changing trademark artwork. */
  .manufacturer-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .manufacturer-strip__item {
    display: grid;
    grid-template-rows: 64px;
    justify-items: center;
    align-items: center;
    text-align: center;
  }
  .manufacturer-strip__logo {
    width: 100%;
    max-width: 160px;
    height: 64px;
    object-fit: contain;
  }
  @media (min-width: 40rem) {
    .manufacturer-strip {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }
  }
  @media (min-width: 64rem) {
    .manufacturer-strip {
      grid-template-columns: repeat(6, minmax(0, 1fr));
    }
  }

  /* Typography roles. Headings keep semantic h1/h2/h3 independent of size. */
  .display,
  .heading-xl,
  .heading-lg,
  .heading-md,
  .heading-sm {
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: var(--line-heading);
    letter-spacing: var(--tracking-heading);
  }
  .display {
    font-size: var(--text-display);
    font-weight: 700;
  }
  .heading-xl {
    font-size: var(--text-heading-xl);
  }
  .heading-lg {
    font-size: var(--text-heading-lg);
  }
  .heading-md {
    font-size: var(--text-heading-md);
  }
  .heading-sm {
    font-size: var(--text-heading-sm);
    line-height: 1.3;
  }
  .lead {
    font-size: var(--text-lead);
    color: var(--color-muted);
  }
  .text-small {
    font-size: var(--text-sm);
  }
  .text-accent {
    color: var(--color-accent);
  }
  .eyebrow,
  .technical-label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 500;
    line-height: 1.6;
  }
  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    width: fit-content;
    max-width: 100%;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    background: var(--color-primary-deep);
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 0.08em;
  }
  .eyebrow > .icon {
    width: 16px;
    height: 16px;
    flex: 0 0 16px;
    color: var(--color-panel-accent);
  }
  .technical-label {
    color: var(--color-muted);
  }

  .section-heading {
    display: grid;
    gap: var(--space-5);
    margin-bottom: var(--space-7);
  }
  .section-heading h2 {
    max-width: 24ch;
  }
  .section-heading__description {
    color: var(--color-muted);
    max-width: 48ch;
  }

  /* Links and controls. Only actionable elements receive hover affordances. */
  .button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    min-height: 48px;
    max-width: 100%;
    padding: var(--space-3) var(--space-5);
    border: var(--border-width) solid transparent;
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    transition:
      background-color var(--duration-fast) var(--ease-standard),
      border-color var(--duration-fast) var(--ease-standard);
  }
  .button--primary {
    background: var(--color-primary);
    color: var(--color-white);
  }
  .button--secondary {
    background: var(--color-surface);
    border-color: var(--color-border-strong);
    color: var(--color-primary);
  }
  .button--accent {
    background: var(--color-highlight);
    color: var(--color-white);
  }
  .button:disabled {
    opacity: 0.5;
  }
  .text-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    min-height: 44px;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-accent);
    text-decoration: none;
  }
  .text-button {
    border: 0;
    background: transparent;
    color: inherit;
    padding: 0;
    font: inherit;
    text-decoration: underline;
    text-underline-offset: 0.2em;
  }
  .icon {
    width: 1.25rem;
    height: 1.25rem;
    flex: 0 0 auto;
  }
  .icon-tile {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    flex: 0 0 auto;
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface-tint);
    color: var(--color-accent);
  }
  .icon-tile--large {
    width: 48px;
    height: 48px;
  }
  .icon-tile--large .icon {
    width: 24px;
    height: 24px;
  }

  /* Cards and compact technical content. */
  .card {
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
  }
  .card__body {
    flex: 1;
    padding: var(--card-padding);
  }
  .card__body > p {
    color: var(--color-muted);
  }
  .card__meta {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
  }
  .badge {
    display: inline-flex;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    background: var(--color-primary);
    color: var(--color-white);
    font: 500 var(--text-xs) / 1.5 var(--font-mono);
  }
  .badge--accent {
    background: var(--color-highlight-soft);
    color: var(--color-highlight);
  }
  .badge--positive {
    background: var(--color-positive-soft);
    color: var(--color-positive);
  }
  .tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  .tag-list li {
    padding: var(--space-1) var(--space-2);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface-soft);
    color: var(--color-muted);
    font-size: var(--text-sm);
  }
  .check-list {
    display: grid;
    gap: var(--space-3);
  }
  .check-list li {
    display: flex;
    align-items: start;
    gap: var(--space-3);
  }
  .check-list .icon {
    margin-top: 0.2em;
  }
  .spec-list {
    width: 100%;
    font-size: var(--text-sm);
  }
  .spec-list > div {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.8fr);
    gap: var(--space-4);
    padding-block: var(--space-3);
    border-top: var(--border-width) solid var(--color-border);
  }
  .spec-list dt {
    color: var(--color-muted);
  }
  .spec-list dd {
    color: var(--color-primary);
  }

  /* Future form vocabulary, exercised on /__design__/; no delivery form yet. */
  .field {
    display: grid;
    gap: var(--space-2);
    width: 100%;
  }
  .field__label {
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--text-sm);
  }
  .field__control {
    width: 100%;
    min-width: 0;
    min-height: 48px;
    padding: var(--space-3);
    border: var(--border-width) solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
  }
  textarea.field__control {
    resize: vertical;
    min-height: 128px;
  }
  .field__control::placeholder {
    color: var(--color-muted);
    opacity: 1;
  }
  .field__control:disabled {
    background: var(--color-surface-tint);
    color: var(--color-muted);
  }
  .field__control[aria-invalid="true"] {
    border-color: var(--color-error);
  }
  .field__hint {
    color: var(--color-muted);
    font-size: var(--text-sm);
  }
  .field__error {
    color: var(--color-error);
    font-size: var(--text-sm);
  }
  .choice {
    display: flex;
    align-items: start;
    gap: var(--space-3);
  }
  .choice input {
    width: 20px;
    height: 20px;
    margin: 0.2em 0 0;
    flex: 0 0 auto;
    accent-color: var(--color-primary);
  }

  .skip-link {
    position: fixed;
    top: var(--space-3);
    left: var(--space-3);
    z-index: var(--z-skip-link);
    padding: var(--space-3) var(--space-4);
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-200%);
  }
  .skip-link:focus {
    transform: translateY(0);
  }

  @media (hover: hover) {
    .button--primary:not(:disabled):hover {
      background: var(--color-primary-hover);
    }
    .button--secondary:not(:disabled):hover {
      background: var(--color-surface-tint);
      border-color: var(--color-accent);
    }
    .button--accent:not(:disabled):hover {
      background: var(--color-primary);
    }
    .text-link:hover {
      text-decoration: underline;
    }
  }
  @media (min-width: 64rem) {
    .section-heading {
      grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
      align-items: end;
      gap: var(--space-8);
    }
    .section-heading__description {
      justify-self: end;
    }
  }
  @media screen and (prefers-reduced-motion: no-preference) {
    /* Content is visible before JS and before intersection. Never hide sections
       or animate their geometry: anchors and the document height stay fixed. */
    .motion-enter {
      animation: content-enter 360ms var(--ease-standard);
    }

    @keyframes content-enter {
      from {
        opacity: 0.9;
        transform: translateY(4px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
  }
  @media (prefers-reduced-motion: reduce) {
    .button {
      transition: none;
    }
  }
}