@layer demo {
  .studio-hero.demo-hero {
    min-height: 0;
    align-items: start;
    padding-block: clamp(2.5rem, 6vw, 4.5rem) var(--smart-space-8);
  }

  .studio-hero .demo-hero__grid {
    align-items: center;
    gap: clamp(1.5rem, 3vw, 2.75rem);
  }

  .studio-hero h1 {
    max-width: 12ch;
  }

  .studio-hero-card {
    display: grid;
    gap: var(--smart-space-5);
    padding: var(--smart-space-6);
  }

  .studio-hero-card h2 {
    margin: 0;
    font-size: var(--smart-font-size-4);
  }

  .studio-path {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--smart-space-2);
  }

  .studio-path button {
    display: flex;
    align-items: center;
    gap: var(--smart-space-4);
    width: 100%;
    padding: var(--smart-space-3) var(--smart-space-4);
    border: 1px solid var(--smart-border);
    border-radius: var(--smart-radius-control);
    background: var(--smart-surface-muted);
    color: inherit;
    font: inherit;
    text-align: start;
    cursor: pointer;
  }

  .studio-path button:hover {
    border-color: color-mix(in srgb, var(--smart-accent) 40%, var(--smart-border));
  }

  .studio-path button:focus-visible {
    outline: 2px solid var(--smart-focus-color);
    outline-offset: 2px;
  }

  .studio-path button span:last-child {
    display: grid;
    gap: 0.15rem;
  }

  .studio-path small {
    color: var(--smart-text-secondary);
    font-size: var(--smart-font-size-0);
  }

  .studio-path__index {
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    inline-size: 1.75rem;
    block-size: 1.75rem;
    border-radius: var(--smart-radius-full);
    background: var(--smart-accent-soft);
    color: var(--smart-accent-strong);
    font-size: var(--smart-font-size-0);
    font-weight: var(--smart-font-weight-semibold);
  }

  .studio-hero-sample {
    display: flex;
    align-items: center;
    gap: var(--smart-space-3);
    padding-block-start: var(--smart-space-2);
    border-block-start: 1px solid var(--smart-divider);
  }

  .studio-hero-swatch {
    inline-size: 1.75rem;
    block-size: 1.75rem;
    border-radius: var(--smart-radius-full);
    background: var(--smart-accent);
    box-shadow: 0 0 0 4px var(--smart-accent-soft);
  }

  .studio-panel {
    padding: var(--smart-space-6);
    border: 1px solid var(--smart-border);
    border-radius: var(--smart-radius-surface);
    background: var(--smart-surface-solid);
  }

  .studio-panel h2 {
    margin: 0 0 var(--smart-space-2);
    font-size: var(--smart-font-size-4);
  }

  .studio-panel > p {
    margin: 0 0 var(--smart-space-5);
    color: var(--smart-text-secondary);
    font-size: var(--smart-font-size-1);
    line-height: var(--smart-line-height-body);
  }

  .studio-presets-bar {
    margin-block-end: var(--smart-space-5);
  }

  .studio-presets-bar .studio-presets {
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    padding: 3px;
  }

  .studio-presets {
    display: grid;
    gap: var(--smart-space-3);
  }

  .studio-preset {
    display: grid;
    gap: var(--smart-space-1);
    padding: var(--smart-space-4);
    text-align: start;
    border: 1px solid var(--smart-border);
    border-radius: var(--smart-radius-surface);
    background: var(--smart-surface-muted);
    cursor: pointer;
    color: inherit;
    font: inherit;
  }

  .studio-preset:focus-visible,
  .studio-screen-option:focus-visible {
    outline: 2px solid var(--smart-focus-color);
    outline-offset: -2px;
  }

  .studio-preset[aria-current="true"] {
    border-color: color-mix(in srgb, var(--smart-accent) 45%, var(--smart-border));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--smart-accent) 30%, transparent);
  }

  #studio-accent {
    inline-size: 3.25rem;
    block-size: 2.25rem;
    padding: 0.15rem;
    border: 1px solid var(--smart-border);
    border-radius: var(--smart-radius-control);
    background: var(--smart-surface-solid);
  }

  .studio-panel .demo-token-row {
    grid-template-columns: 7.25rem minmax(0, 1fr) auto;
  }

  #studio-radius::-webkit-slider-runnable-track,
  #studio-radius::-moz-range-track {
    border-radius: var(--smart-radius-control);
  }

  .studio-color-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--smart-space-3);
  }

  .studio-group {
    margin: 0;
    padding: var(--smart-space-4) 0 0;
    border: 0;
    border-block-start: 1px solid var(--smart-divider);
  }

  .studio-group legend {
    padding: 0;
    font-size: var(--smart-font-size-1);
    font-weight: var(--smart-font-weight-semibold);
  }

  .studio-workspace {
    padding-block: var(--smart-space-6) var(--smart-space-8);
  }

  .studio-workspace > .smart-tab-panel {
    margin-block-start: var(--smart-space-6);
    padding-block-start: 0;
    scroll-margin-top: 5.5rem;
  }

  .studio-layout {
    display: grid;
    gap: var(--smart-space-5);
    align-items: start;
  }

  @media (min-width: 60rem) {
    .studio-layout {
      grid-template-columns: minmax(18rem, 24rem) minmax(0, 1fr);
    }

    .studio-layout > .studio-panel:last-child {
      position: sticky;
      top: 5.5rem;
    }
  }

  .studio-preset strong {
    font-size: var(--smart-font-size-2);
  }

  .studio-preset span {
    color: var(--smart-text-secondary);
    font-size: var(--smart-font-size-0);
  }

  .studio-preview {
    padding: var(--smart-space-5);
    border: 1px solid var(--smart-border);
    border-radius: var(--smart-radius-surface);
    background: var(--smart-canvas);
  }

  .studio-preview .smart-page-header {
    align-items: center;
    padding-block: var(--smart-space-5);
  }

  .studio-preview .smart-page-header h2 {
    margin: 0;
    font-size: var(--smart-font-size-5);
    letter-spacing: var(--smart-letter-spacing-tight);
    line-height: var(--smart-line-height-tight);
  }

  .studio-preview > .smart-card {
    inline-size: min(100%, 24rem);
  }

  .studio-contrast {
    display: grid;
    justify-items: start;
    gap: var(--smart-space-2);
    margin-block-start: 0;
  }

  .studio-density__copy {
    display: grid;
    gap: 0.2rem;
    min-inline-size: 0;
  }

  .studio-density__copy small {
    color: var(--smart-text-secondary);
    font-size: var(--smart-font-size-0);
    line-height: var(--smart-line-height-body);
  }

  .studio-actions--stack {
    flex-direction: column;
    align-items: stretch;
  }

  .studio-actions--stack .smart-button {
    justify-content: center;
  }

  .studio-ship-steps {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .studio-ship-steps li {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--smart-space-4);
    align-items: start;
    padding: var(--smart-space-4) 0;
    border: 0;
    border-radius: 0;
    border-block-end: 1px solid var(--smart-divider);
    background: transparent;
  }

  .studio-ship-steps li:first-child {
    padding-block-start: 0;
  }

  .studio-ship-steps li:last-child {
    border-block-end: 0;
    padding-block-end: 0;
  }

  .studio-ship-steps h3 {
    margin: 0.15rem 0 var(--smart-space-1);
    font-size: var(--smart-font-size-3);
  }

  .studio-ship-steps p {
    margin: 0;
    color: var(--smart-text-secondary);
    line-height: var(--smart-line-height-body);
  }

  .studio-screens {
    display: grid;
    gap: var(--smart-space-5);
  }

  .studio-screen-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--smart-space-4);
  }

  .studio-screen-bar h2 {
    margin: 0;
  }

  .studio-screen-picker {
    display: flex;
    flex-wrap: wrap;
    gap: var(--smart-space-2);
  }

  .studio-screen-option {
    width: auto;
    padding: var(--smart-space-2) var(--smart-space-4);
    border: 1px solid var(--smart-border);
    border-radius: var(--smart-radius-full);
    background: var(--smart-surface-muted);
    color: inherit;
    font: inherit;
    cursor: pointer;
  }

  .studio-screen-option[aria-current="true"] {
    border-color: color-mix(in srgb, var(--smart-accent) 45%, var(--smart-border));
    background: var(--smart-accent-soft);
    color: var(--smart-accent-strong);
  }

  .studio-screen-option span {
    display: none;
  }

  .studio-stage {
    padding: var(--smart-space-5);
    border: 1px solid var(--smart-border);
    border-radius: var(--smart-radius-surface);
    background: var(--smart-canvas);
  }

  .studio-stage .smart-auth-layout {
    min-block-size: 0;
    padding-block: var(--smart-space-4);
  }

  .studio-code pre {
    margin: var(--smart-space-4) 0 0;
    padding: var(--smart-space-4);
    overflow: auto;
    max-block-size: 18rem;
    border-radius: var(--smart-radius-control);
    background: var(--smart-surface-muted);
    font-family: var(--smart-font-mono);
    font-size: var(--smart-font-size-0);
    white-space: pre-wrap;
  }

  .studio-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--smart-space-3);
    margin-block-start: var(--smart-space-5);
  }

  /* ── Studio Pro: catalog sub-tabs, token fields, contrast badges ── */

  .studio-subtabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--smart-space-2);
    margin-block-end: var(--smart-space-5);
  }

  .studio-subtab {
    appearance: none;
    border: 1px solid var(--smart-border);
    background: transparent;
    color: var(--smart-text-secondary);
    font: inherit;
    font-size: var(--smart-font-size-1);
    font-weight: 500;
    padding: 0.35rem 0.8rem;
    border-radius: var(--smart-radius-full);
    cursor: pointer;
  }

  .studio-subtab:hover { color: var(--smart-text); border-color: var(--smart-border-strong); }

  .studio-subtab[aria-selected="true"] {
    background: var(--smart-accent);
    border-color: transparent;
    color: var(--smart-on-accent, #ffffff);
  }

  .studio-subpanel { display: grid; gap: var(--smart-space-4); align-content: start; }
  .studio-subpanel[hidden] { display: none; }

  .studio-token__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--smart-space-3);
    margin-block-end: var(--smart-space-2);
  }

  .studio-token__head .smart-label { margin-block-end: 0; }

  .studio-token__pair {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
    gap: var(--smart-space-3);
  }

  .studio-token__mode {
    display: grid;
    gap: var(--smart-space-1);
    font-size: var(--smart-font-size-0);
    color: var(--smart-text-secondary);
  }

  .studio-token__inputs {
    display: flex;
    align-items: center;
    gap: var(--smart-space-2);
    min-inline-size: 0;
  }

  .studio-token__hex {
    font-family: var(--smart-font-mono);
    font-size: var(--smart-font-size-0);
    min-inline-size: 0;
    flex: 1 1 auto;
  }

  .studio-token__hex--empty:not(:focus) { opacity: 0.62; }
  .studio-token__hex--empty:not(:focus)::placeholder { opacity: 0.85; }
  .studio-token__hex--invalid { border-color: var(--smart-danger); }

  .studio-token__grow { flex: 1 1 auto; }

  .studio-token__inputs input[type="color"] {
    inline-size: 2.4rem;
    block-size: 2.4rem;
    padding: 0;
    border: 1px solid var(--smart-border);
    border-radius: var(--smart-radius-sm);
    background: none;
    flex: 0 0 auto;
    cursor: pointer;
  }

  .studio-token__inputs input[type="color"]::-webkit-color-swatch-wrapper { padding: 2px; }
  .studio-token__inputs input[type="color"]::-webkit-color-swatch { border: none; border-radius: calc(var(--smart-radius-sm) - 2px); }

  .studio-token-reset {
    display: none;
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--smart-text-tertiary);
    font-size: var(--smart-font-size-1);
    line-height: 1;
    padding: 0.25rem 0.4rem;
    border-radius: var(--smart-radius-sm);
    cursor: pointer;
    flex: 0 0 auto;
  }

  [data-studio-token-wrap][data-overridden="true"] .studio-token-reset { display: inline-flex; }

  .studio-token-reset:hover { color: var(--smart-danger); background: var(--smart-surface-muted); }

  .studio-token-badge { display: inline-flex; }
  .studio-token-badge[hidden] { display: none; }

  .studio-code-input {
    font-family: var(--smart-font-mono);
    font-size: var(--smart-font-size-1);
    resize: vertical;
    min-block-size: 12rem;
  }

  .demo-token-row .studio-token__hex { max-inline-size: 9rem; }
}