/* ============================================================================
   SHARED CHROME — nav, dropdown, and mobile child navigation primitives.
   Consumed by web-lab and web-neo so shared @lab/chrome markup does not drift.
   ============================================================================ */

@layer components {
  /* -- Cross-app UI primitives ---------------------------------------------
     Canonical shared CTA, menu, meta-row, icon, and separator vocabulary for
     web-lab and web-neo. App-local selectors are aliased here while templates
     migrate toward the `system-*` names; app CSS may add layout context, but
     must not redefine these visual contracts. */
  .system-cta-primary,
  .download-primary {
    --system-cta-face: var(--ink-deep);
    --system-cta-fill-hover: var(--tacet-orange-on-light);
    --system-cta-text: var(--beige-50);
    --system-cta-border: var(--tacet-orange-on-light);
    --system-cta-text-hover: var(--beige-50);
    --system-cta-border-hover: var(--ink-deep);
    --system-cta-rail: var(--tacet-orange-on-light);
    --system-cta-rail-hover: var(--ink-deep);
  }

  .system-cta-secondary,
  .hero-secondary-button {
    --system-cta-face: var(--background);
    --system-cta-fill-hover: color-mix(
      in oklch,
      var(--surface-container),
      var(--tacet-orange-on-light) 12%
    );
    --system-cta-text: var(--foreground);
    --system-cta-border: var(--foreground);
    --system-cta-text-hover: var(--foreground);
    --system-cta-border-hover: var(--tacet-orange-on-light);
    --system-cta-rail: var(--tacet-orange-on-light);
    --system-cta-rail-hover: var(--tacet-orange-on-light);
  }

  .system-cta-primary,
  .download-primary,
  .system-cta-secondary,
  .hero-secondary-button {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 3.5rem;
    padding: var(--space-3) var(--space-6);
    border: 1px solid var(--system-cta-border);
    border-radius: 0;
    background: var(--system-cta-face);
    color: var(--system-cta-text);
    box-shadow: none;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    line-height: 1.2;
    text-decoration: none;
    text-transform: uppercase;
    cursor: pointer;
    transition:
      border-color var(--duration-fast) var(--ease-standard),
      color var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard);
  }

  .system-cta-primary::before,
  .download-primary::before,
  .system-cta-secondary::before,
  .hero-secondary-button::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--system-cta-fill-hover);
    pointer-events: none;
    z-index: -1;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-fast) var(--ease-decelerate);
  }

  .system-cta-primary::after,
  .download-primary::after,
  .system-cta-secondary::after,
  .hero-secondary-button::after {
    content: "";
    position: absolute;
    right: -1px;
    bottom: -1px;
    left: -1px;
    height: 2px;
    background: var(--system-cta-rail);
    pointer-events: none;
    z-index: 1;
    transform: scaleX(1);
    transform-origin: left;
    transition:
      background var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard);
  }

  .system-cta-primary:hover,
  .download-primary:hover,
  .system-cta-secondary:hover,
  .hero-secondary-button:hover {
    border-color: var(--system-cta-border-hover);
    color: var(--system-cta-text-hover);
  }

  .system-cta-primary:hover::before,
  .download-primary:hover::before,
  .system-cta-secondary:hover::before,
  .hero-secondary-button:hover::before {
    transform: scaleX(1);
  }

  .system-cta-primary:hover::after,
  .download-primary:hover::after,
  .system-cta-secondary:hover::after,
  .hero-secondary-button:hover::after {
    background: var(--system-cta-rail-hover);
    transform: scaleX(1);
  }

  .system-cta-primary svg,
  .download-primary svg,
  .system-cta-secondary svg,
  .hero-secondary-button svg {
    width: 1rem;
    height: 1rem;
    stroke-width: 2.35;
    color: currentColor;
    transition: transform var(--duration-fast) var(--ease-standard);
  }

  .system-cta-primary:hover svg,
  .download-primary:hover svg,
  .system-cta-secondary:hover svg,
  .hero-secondary-button:hover svg {
    transform: translateX(0.125rem);
  }

  .system-cta-ghost,
  .download-menu--hero .download-menu__trigger {
    --system-cta-text: var(--text-m);
    --system-cta-text-hover: var(--foreground);

    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 3rem;
    padding: 0 0.1rem;
    border: 0;
    background: transparent;
    box-shadow: inset 0 -1px 0 var(--border);
    color: var(--system-cta-text);
    font-family: var(--font-body);
    font-size: var(--fs-meta);
    font-weight: 800;
    letter-spacing: 0.1em;
    line-height: 1.2;
    text-transform: uppercase;
    cursor: pointer;
    transition:
      color var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard);
  }

  .system-cta-ghost::after,
  .download-menu--hero .download-menu__trigger::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 2px;
    background: var(--tacet-orange-on-light);
    pointer-events: none;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-fast) var(--ease-decelerate);
  }

  .system-cta-ghost:hover,
  .download-menu--hero .download-menu__trigger:hover,
  .download-menu--hero[data-open="true"] .download-menu__trigger {
    background: transparent;
    color: var(--system-cta-text-hover);
  }

  .system-cta-ghost:hover::after,
  .download-menu--hero .download-menu__trigger:hover::after,
  .download-menu--hero[data-open="true"] .download-menu__trigger::after {
    transform: scaleX(1);
  }

  .system-cta-primary:focus-visible,
  .system-cta-secondary:focus-visible,
  .system-cta-ghost:focus-visible,
  .download-primary:focus-visible,
  .hero-secondary-button:focus-visible,
  .download-menu__trigger:focus-visible,
  .download-menu__item:focus-visible {
    outline: var(--outline-width) solid var(--ring);
    outline-offset: var(--outline-offset);
  }

  .system-cta-primary:active,
  .download-primary:active,
  .system-cta-secondary:active,
  .hero-secondary-button:active,
  .system-cta-ghost:active {
    transform: translateY(1px) scale(0.99);
    transition-duration: 70ms;
  }

  @media (prefers-reduced-motion: reduce) {
    .system-cta-primary,
    .system-cta-primary::before,
    .system-cta-primary::after,
    .download-primary,
    .download-primary::before,
    .download-primary::after,
    .system-cta-secondary,
    .system-cta-secondary::before,
    .system-cta-secondary::after,
    .hero-secondary-button,
    .hero-secondary-button::before,
    .hero-secondary-button::after,
    .system-cta-ghost,
    .system-cta-ghost::after,
    .download-menu--hero .download-menu__trigger,
    .download-menu--hero .download-menu__trigger::after,
    :is(
        .system-cta-primary,
        .download-primary,
        .system-cta-secondary,
        .hero-secondary-button
      )
      svg {
      transition-duration: 0.01ms !important;
    }

    .system-cta-primary:hover,
    .system-cta-primary:active,
    .download-primary:hover,
    .download-primary:active,
    .system-cta-secondary:hover,
    .system-cta-secondary:active,
    .hero-secondary-button:hover,
    .hero-secondary-button:active,
    .system-cta-ghost:hover,
    .system-cta-ghost:active,
    :is(
        .system-cta-primary,
        .download-primary,
        .system-cta-secondary,
        .hero-secondary-button
      ):hover
      svg {
      transform: none;
    }
  }

  .system-menu,
  .download-menu {
    position: relative;
    display: inline-flex;
  }

  .system-menu__trigger,
  .download-menu__trigger {
    --system-cta-face: var(--beige-50);
    --system-cta-text: var(--ink-deep);
    --system-cta-border: var(--beige-300);
    --system-cta-frame: var(--beige-300);
    --system-cta-face-hover: var(--beige-100);
    --system-cta-text-hover: var(--ink-deep);
    --system-cta-border-hover: var(--ink-deep);
    --system-cta-frame-hover: var(--ink-deep);
    --system-cta-frame-width: 3px;
    --system-cta-corner-size: 0.875rem;

    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border: var(--system-cta-frame-width) solid var(--system-cta-frame);
    background: var(--system-cta-face);
    color: var(--system-cta-text);
    box-shadow: none;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: var(--fs-meta);
    font-weight: 600;
    letter-spacing: 0.18em;
    line-height: 1.2;
    text-transform: uppercase;
    transition:
      background var(--duration-fast) var(--ease-standard),
      border-color var(--duration-fast) var(--ease-standard),
      box-shadow var(--duration-fast) var(--ease-standard),
      color var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard);
  }

  .system-menu__trigger:hover,
  .system-menu[data-open="true"] .system-menu__trigger,
  .download-menu__trigger:hover,
  .download-menu[data-open="true"] .download-menu__trigger {
    background: var(--system-cta-face-hover);
    border-color: var(--system-cta-frame-hover);
    color: var(--system-cta-text-hover);
  }

  .system-menu__trigger::after,
  .download-menu__trigger::after {
    content: "";
    position: absolute;
    top: calc(-1 * var(--system-cta-frame-width));
    right: calc(-1 * var(--system-cta-frame-width));
    width: var(--system-cta-corner-size);
    height: var(--system-cta-corner-size);
    background: var(--system-cta-frame);
    pointer-events: none;
    transition: background var(--duration-fast) var(--ease-standard);
  }

  .system-menu__trigger:hover::after,
  .system-menu[data-open="true"] .system-menu__trigger::after,
  .download-menu__trigger:hover::after,
  .download-menu[data-open="true"] .download-menu__trigger::after {
    background: var(--system-cta-frame-hover);
  }

  .audience-bar__agent-link:focus-visible {
    outline: var(--outline-width) solid var(--ring);
    outline-offset: var(--outline-offset);
  }

  .nav-signin-link {
    --nav-signin-face: var(--ink-deep);
    --nav-signin-text: var(--beige-50);
    --nav-signin-frame: var(--primary);
    --nav-signin-face-hover: var(--tacet-orange-on-light);
    --nav-signin-text-hover: var(--beige-50);
    --nav-signin-frame-hover: var(--tacet-orange-on-light);
    --nav-signin-frame-width: 3px;
    --nav-signin-corner-size: 0.625rem;

    position: relative;
    display: inline-flex;
    min-height: 2.25rem;
    align-items: center;
    justify-content: center;
    border: var(--nav-signin-frame-width) solid var(--nav-signin-frame);
    background: var(--nav-signin-face);
    color: var(--nav-signin-text);
    box-shadow: none;
    font-family: var(--font-body);
    font-weight: 600;
    letter-spacing: 0;
    line-height: 1;
    text-transform: none;
    transition:
      background var(--duration-fast) var(--ease-standard),
      border-color var(--duration-fast) var(--ease-standard),
      color var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard);
  }

  .nav-signin-link::after {
    content: "";
    position: absolute;
    top: calc(-1 * var(--nav-signin-frame-width));
    right: calc(-1 * var(--nav-signin-frame-width));
    width: var(--nav-signin-corner-size);
    height: var(--nav-signin-corner-size);
    background: var(--nav-signin-frame);
    pointer-events: none;
    transition: background var(--duration-fast) var(--ease-standard);
  }

  .nav-signin-link:hover,
  .nav-signin-link:focus-visible {
    background: var(--nav-signin-face-hover);
    border-color: var(--nav-signin-frame-hover);
    color: var(--nav-signin-text-hover);
  }

  .nav-signin-link:hover::after,
  .nav-signin-link:focus-visible::after {
    background: var(--nav-signin-frame-hover);
  }

  .nav-signin-link:active {
    transform: translate(1px, 1px);
  }

  .nav-signin-link:focus-visible {
    outline: var(--outline-width) solid var(--ring);
    outline-offset: var(--outline-offset);
  }

  .system-menu__caret,
  .download-menu__caret {
    width: 0.75rem;
    height: 0.75rem;
    transition: transform var(--duration-fast) var(--ease-standard);
  }

  .system-menu[data-open="true"] .system-menu__caret,
  .download-menu[data-open="true"] .download-menu__caret {
    transform: rotate(180deg);
  }

  .system-menu__panel,
  .download-menu__panel {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    z-index: 40;
    width: min(22rem, calc(100vw - var(--space-8)));
    border: var(--border-width-base) solid var(--border);
    background: var(--background);
    box-shadow: 6px 6px 0 color-mix(in oklch, var(--border), transparent 12%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(calc(var(--space-1) * -1));
    transition:
      opacity var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard),
      visibility 0s linear var(--duration-fast);
  }

  .system-menu[data-open="true"] .system-menu__panel,
  .download-menu[data-open="true"] .download-menu__panel {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    transition:
      opacity var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard),
      visibility 0s linear 0s;
  }

  .system-menu__item,
  .download-menu__item {
    display: grid;
    gap: var(--space-1);
    padding: var(--space-4);
    border-bottom: var(--border-width-base) solid var(--border);
    color: var(--foreground);
    text-decoration: none;
  }

  .system-menu__item:last-child,
  .download-menu__item:last-child {
    border-bottom: 0;
  }

  .system-menu__item:hover,
  .system-menu__item:focus-visible,
  .download-menu__item:hover,
  .download-menu__item:focus-visible {
    background: color-mix(in oklch, var(--background), var(--primary) 5%);
  }

  .system-menu__name,
  .download-menu__name {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 800;
    line-height: 1;
    text-transform: uppercase;
  }

  .system-menu__meta,
  .download-menu__meta {
    color: var(--text-m);
    font-family: var(--font-body);
    font-size: var(--fs-chip);
    letter-spacing: 0.08em;
    line-height: 1.45;
    text-transform: uppercase;
  }

  .system-meta-row,
  .release-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-3);
    color: var(--text-m);
    font-family: var(--font-body);
    font-size: var(--fs-chip);
    letter-spacing: var(--tracking-widest);
    line-height: 1.2;
    text-transform: uppercase;
  }

  .system-meta-row__sep,
  .release-meta__sep {
    width: 1px;
    height: 1.25rem;
    background: color-mix(in oklch, var(--text-m), transparent 62%);
  }

  .system-meta-row__link,
  .release-meta__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 2rem;
    color: var(--tacet-orange-on-light);
    text-decoration: none;
  }

  .system-meta-row__link span:first-child,
  .release-meta__link span:first-child {
    border-bottom: var(--border-width-base) solid currentColor;
    padding-bottom: 0.125rem;
  }

  .system-meta-row__icon,
  .release-meta__icon {
    display: inline-flex;
    width: 1rem;
    height: 1rem;
    align-items: center;
    justify-content: center;
    color: var(--tacet-orange-on-light);
    transition: transform var(--duration-fast) var(--ease-standard);
  }

  .system-meta-row__icon svg,
  .release-meta__icon svg {
    width: 1rem;
    height: 1rem;
    stroke-width: 2.35;
  }

  .system-meta-row__link:hover .system-meta-row__icon,
  .system-meta-row__link:focus-visible .system-meta-row__icon,
  .release-meta__link:hover .release-meta__icon,
  .release-meta__link:focus-visible .release-meta__icon {
    transform: translateX(0.125rem);
  }

  .system-meta-row__link:focus-visible,
  .release-meta__link:focus-visible {
    outline: var(--outline-width) solid var(--ring);
    outline-offset: var(--outline-offset);
  }

  .system-inline-icon,
  .ui-icon {
    display: inline-flex;
    width: 1em;
    height: 1em;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    line-height: 1;
  }

  .system-inline-icon svg,
  .ui-icon svg {
    width: 100%;
    height: 100%;
  }

  .system-separator,
  .ui-separator {
    display: inline-block;
    width: 0.25rem;
    height: 0.25rem;
    margin-inline: 0.625rem;
    background: currentColor;
    opacity: 0.45;
    transform: translateY(-0.1em);
  }

  .nav-primary-disclosure {
    position: relative;
    display: flex;
    align-items: stretch;
  }

  .nav-primary-link {
    min-width: max-content;
    color: var(--nav-link);
    font-family: var(--font-body);
    font-weight: 650;
    letter-spacing: 0;
    text-underline-offset: 0.35em;
    text-transform: none;
    transition:
      color var(--duration-fast) var(--ease-standard),
      border-bottom-color var(--duration-fast) var(--ease-standard),
      background var(--duration-fast) var(--ease-standard);
  }

  .nav-primary-link:hover:not(.nav-primary-link--current),
  .nav-primary-link:focus-visible:not(.nav-primary-link--current) {
    background: color-mix(in oklch, var(--background), var(--primary) 4%);
    color: var(--tacet-orange-on-light);
    border-bottom-color: var(--primary);
  }

  .nav-primary-link--current,
  .nav-primary-link--current:hover,
  .nav-primary-link--current:focus-visible {
    color: var(--primary);
    border-bottom-color: var(--primary);
  }

  .nav-primary-link:focus-visible {
    outline: var(--outline-width) solid var(--ring);
    outline-offset: calc(var(--outline-offset) * -1);
  }

  .nav-primary-trigger {
    appearance: none;
    cursor: pointer;
    background: transparent;
    color: var(--nav-link);
    border-top: 0;
    border-right: 0;
    border-left: 0;
    font: inherit;
    font-weight: 650;
    text-transform: inherit;
    letter-spacing: inherit;
  }

  .nav-primary-menu {
    position: absolute;
    top: calc(100% - 1px);
    left: 50%;
    width: min(26rem, calc(100vw - 3rem));
    transform: translate3d(-50%, -0.25rem, 0);
    z-index: 55;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    border: var(--border-width-base) solid var(--border);
    background: var(--background);
    box-shadow: 8px 8px 0 color-mix(in oklch, var(--border), transparent 12%);
    transition:
      opacity var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard),
      visibility 0s linear var(--duration-fast);
  }

  .nav-primary-menu::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: -0.5rem;
    height: 0.5rem;
  }

  .nav-primary-disclosure:hover .nav-primary-menu,
  .nav-primary-disclosure:focus-within .nav-primary-menu,
  .nav-primary-disclosure[data-open="true"] .nav-primary-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate3d(-50%, 0, 0);
    transition:
      opacity var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard),
      visibility 0s linear 0s;
  }

  .nav-primary-menu-list {
    display: grid;
  }

  .nav-primary-menu-item {
    display: grid;
    gap: var(--space-1);
    padding: var(--space-4);
    border-bottom: var(--border-width-base) solid
      color-mix(in oklch, var(--border), transparent 10%);
    color: var(--foreground);
    text-decoration: none;
    transition:
      background var(--duration-fast) var(--ease-standard),
      color var(--duration-fast) var(--ease-standard);
  }

  .nav-primary-menu-item:last-child {
    border-bottom: 0;
  }

  .nav-primary-menu-item:hover,
  .nav-primary-menu-item:focus-visible {
    background: color-mix(in oklch, var(--background), var(--primary) 5%);
  }

  .nav-primary-menu-item:focus-visible {
    outline: var(--outline-width) solid var(--ring);
    outline-offset: calc(var(--outline-offset) * -1);
  }

  .nav-primary-menu-name {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 0;
    line-height: 1.05;
    text-transform: uppercase;
  }

  .nav-primary-menu-desc {
    max-width: 34ch;
    color: var(--text-m);
    font-family: var(--font-body);
    font-size: var(--fs-meta);
    font-weight: 400;
    letter-spacing: 0;
    line-height: 1.4;
    text-transform: none;
  }

  /* Accordion: collapsed by default. The mobile-menu.js disclosure handler
     toggles the `hidden` attribute on the panel; native `[hidden]` keeps the
     panel out of the layout when collapsed, then animates open via the
     trigger's aria-expanded state (handled by .mobile-menu-link-caret
     rotation below). Keeps the menu height manageable on phones — only the
     section the user taps reveals its child rows. */
  .mobile-menu-children {
    display: grid;
    gap: 0;
    /* Shell padding no longer creates an inline clipping offset, so keep the
       child panel within the same right edge as the top-level rows. */
    margin: 0 0 0.35rem 2.25rem;
    border-left: var(--border-width-base) solid
      color-mix(in oklch, var(--border), transparent 8%);
  }
  .mobile-menu-children[hidden] {
    display: none;
  }

  .mobile-menu-child-link {
    display: flex;
    align-items: center;
    /* Sub-item hit area: 44px floor (WCAG 2.2 AA target size + iOS HIG).
       Previously 32px / ~28px tap zone — too tight on touch. ~1.4× scale. */
    min-height: 2.75rem;
    /* The link fills the container naturally; padding-right keeps the text
       off the edge so the band has breathing room around the label. */
    padding: 0.55rem 1rem 0.55rem 0.85rem;
    color: var(--nav-link);
    font-family: var(--font-body);
    font-size: var(--fs-chip);
    font-weight: 500;
    letter-spacing: 0.16em;
    line-height: 1.1;
    text-decoration: none;
    text-transform: uppercase;
    /* Tap feedback: instant background flash so users get visible-system
       status before the page navigation completes. -webkit-tap-highlight-
       color disables the iOS overlay so :active is the only signal. */
    -webkit-tap-highlight-color: transparent;
    transition: background var(--duration-fast) var(--ease-standard);
  }

  .mobile-menu-child-link--parent {
    /* "X home" — the parent-page link inside the expanded panel. Slight
       weight bump signals it's the canonical landing page; the children
       below are sub-pages. */
    font-weight: 600;
    color: var(--foreground);
  }

  .mobile-menu-child-link--current {
    color: var(--primary);
  }

  .mobile-menu-child-link:active,
  .mobile-menu-child-link:focus-visible,
  .mobile-menu-child-link.is-tapped {
    /* JS-driven `.is-tapped` mirrors :active for Safari iOS — see
       mobile-menu.js bindTapFeedback(). Lingers ~180ms after pointerup. */
    background: color-mix(in oklch, var(--background), var(--primary) 7%);
  }

  .mobile-menu-child-link:focus-visible {
    outline: var(--outline-width) solid var(--ring);
    outline-offset: var(--outline-offset);
  }

  /* Caret rotation on the accordion trigger: 0deg collapsed → 180deg open.
     The trigger button carries aria-expanded which doubles as the styling
     hook. Pure CSS transform, GPU-friendly. */
  .mobile-menu-link-caret {
    display: inline-flex;
    align-items: center;
    margin-left: auto;
    color: var(--text-m);
    transition: transform var(--duration-fast) var(--ease-standard);
  }
  .mobile-menu-link--has-children[aria-expanded="true"]
    .mobile-menu-link-caret {
    transform: rotate(180deg);
    color: var(--primary);
  }

  #mobile-menu-toggle {
    /* Touch-target hygiene: kill iOS double-tap zoom and the default gray
       tap-highlight overlay so :active / :focus-visible drive the visible
       state change cleanly across iOS Safari and Android Chrome. */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transition:
      background var(--duration-fast) var(--ease-standard),
      color var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard);
  }

  #mobile-menu-toggle:hover,
  #mobile-menu-toggle:focus-visible {
    background: color-mix(in oklch, var(--background), var(--primary) 5%);
    color: var(--tacet-orange-on-light);
  }

  #mobile-menu-toggle:active {
    transform: translateY(1px);
  }

  #mobile-menu-toggle:focus-visible {
    outline: var(--outline-width) solid var(--ring);
    outline-offset: var(--outline-offset);
  }

  .nav-caret {
    width: var(--space-3);
    height: var(--space-3);
    color: var(--text-m);
    transition: transform var(--duration-normal) var(--ease-angular);
  }

  .ps:hover .nav-caret,
  .ps:focus-within .nav-caret,
  .ps[data-open="true"] .nav-caret,
  .nav-primary-disclosure:hover .nav-caret,
  .nav-primary-disclosure:focus-within .nav-caret,
  .nav-primary-disclosure[data-open="true"] .nav-caret,
  .erpnav-features:hover .nav-caret,
  .erpnav-features:focus-within .nav-caret,
  .erpnav-features[data-open="true"] .nav-caret,
  .crmnav-features:hover .nav-caret,
  .crmnav-features:focus-within .nav-caret,
  .crmnav-features[data-open="true"] .nav-caret {
    transform: rotate(180deg);
  }

  /* Shared secondary navigation ------------------------------------------
     The sticky rail splits its configured reduction across both sides, while the
     resting rail retains its full-width structural bottom rule. Overflow is
     navigated with the shared edge controls, never a native scrollbar. */
  body :is(.tacet-page-nav, .proto-page-nav) {
    --tacet-page-nav-stuck-inset: clamp(var(--space-3), 3vw, var(--space-8));
    --tacet-page-nav-stuck-width: min(
      calc(
        var(--tacet-nav-bar-width, var(--tacet-nav-width-scrolled)) -
          var(--tacet-page-nav-stuck-inset)
      ),
      calc(100vw - (2 * var(--space-3)))
    );
    --tacet-page-nav-stuck-left: calc(
      (100vw - var(--tacet-page-nav-stuck-width)) / 2
    );
  }

  [data-inpage-nav]:not(.tacet-page-nav):not(.proto-page-nav) {
    position: relative;
  }

  [data-inpage-nav] > div {
    -ms-overflow-style: none;
    overscroll-behavior-inline: contain;
    scrollbar-width: none;
  }

  [data-inpage-nav] > div::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
  }

  :is(.tacet-page-nav, .proto-page-nav) .inpage-nav-arrow {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 59;
    display: none;
    width: var(--space-10);
    min-width: var(--space-10);
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    background: linear-gradient(
      to right,
      var(--tacet-page-nav-shell) 0%,
      var(--tacet-page-nav-shell) 68%,
      transparent 100%
    );
    color: var(--org-on-light);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: var(--text-xl);
    font-weight: 700;
    line-height: 1;
  }

  :is(.tacet-page-nav, .proto-page-nav) .inpage-nav-arrow--left {
    left: var(--tacet-page-nav-rest-edge, 0);
  }

  :is(.tacet-page-nav, .proto-page-nav) .inpage-nav-arrow--right {
    right: var(--tacet-page-nav-rest-edge, 0);
    background: linear-gradient(
      to left,
      var(--tacet-page-nav-shell) 0%,
      var(--tacet-page-nav-shell) 68%,
      transparent 100%
    );
  }

  :is(.tacet-page-nav, .proto-page-nav) .inpage-nav-arrow:hover {
    color: var(--foreground);
  }

  :is(.tacet-page-nav, .proto-page-nav) .inpage-nav-arrow:focus-visible {
    outline: var(--outline-width) solid var(--ring);
    outline-offset: calc(-1 * var(--outline-width));
  }

  :is(.tacet-page-nav, .proto-page-nav)[data-stuck="true"] .inpage-nav-arrow {
    position: fixed;
    top: calc(var(--tacet-nav-bottom, var(--chrome-height)) - 0.625rem);
    bottom: auto;
    min-height: 3.625rem;
    padding-top: 0.625rem;
    border-bottom: 1px solid var(--tacet-panel-border);
    background: var(--tacet-page-nav-shell-stuck);
  }

  :is(.tacet-page-nav, .proto-page-nav)[data-stuck="true"]
    .inpage-nav-arrow--left {
    left: var(--tacet-page-nav-stuck-left);
    border-left: 1px solid var(--tacet-panel-border);
    border-bottom-left-radius: var(--radius-md);
  }

  :is(.tacet-page-nav, .proto-page-nav)[data-stuck="true"]
    .inpage-nav-arrow--right {
    right: auto;
    left: calc(
      var(--tacet-page-nav-stuck-left) + var(--tacet-page-nav-stuck-width) -
        var(--space-10)
    );
    border-right: 1px solid var(--tacet-panel-border);
    border-bottom-right-radius: var(--radius-md);
  }
}