:root {
      --ink: #1A1714;
      --cream: #F7F4EF;
      color-scheme: light;
      --bb-color-background: #F7F4EF;
      --bb-color-surface: #FFFFFF;
      --bb-color-surface-raised: #FDFCFA;
      --bb-color-border: rgba(0, 0, 0, 0.08);
      --bb-color-border-strong: rgba(0, 0, 0, 0.15);
      --bb-color-text-primary: #1A1A1A;
      --bb-color-text-secondary: #6B6560;
      --bb-color-text-tertiary: #9E9994;
      --canvas: var(--bb-color-background);
      --header-bg: var(--bb-color-surface);
      --card-bg: var(--bb-color-surface);
      --text-primary: var(--bb-color-text-primary);
      --text-secondary: var(--bb-color-text-secondary);
      --border: var(--bb-color-border-strong);
      --border-subtle: var(--bb-color-border);
      --accent: var(--bb-color-accent);
      --accent-muted: var(--bb-color-accent-surface);
      --info: var(--bb-color-text-secondary);
      --info-bg: var(--bb-color-surface-raised);
      --success: var(--bb-status-approved, #2E7D52);
      --success-bg: var(--bb-color-success-surface);
      --warning: var(--bb-status-pending, #B45309);
      --warning-bg: var(--bb-color-warning-surface);
      --danger: #a34040;
      --danger-border: #c46060;
      --color-text-warning: var(--warning);
      --color-text-danger: var(--danger);
      --color-background-secondary: var(--header-bg);
      --color-text-secondary: var(--text-secondary);
      --color-border-secondary: var(--border-subtle);
      --color-border-tertiary: var(--border-subtle);
      --color-background-info: var(--info-bg);
      --color-text-info: var(--info);
      --color-background-warning: var(--warning-bg);
      --color-text-warning: var(--warning);
      --color-background-success: var(--success-bg);
      --color-text-success: var(--success);
      --color-background-danger: color-mix(in srgb, var(--danger) 16%, transparent);
      --color-text-danger: var(--danger);
      --color-background-primary: var(--card-bg);
      --color-text-primary: var(--text-primary);
      --color-border-info: var(--info);
      /* Chapter / progress dots — one palette app-wide: pending, beats, prose, approved, error, generating */
      --bb-ch-dot-pending: #8E8A85;
      --bb-ch-dot-beats: #2563EB;
      --bb-ch-dot-prose: #D97706;
      --bb-ch-dot-approved: #2E7D52;
      --bb-ch-dot-error: #C53030;
      --bb-ch-dot-generating: #C84B31;
      --input-bg: var(--bb-color-surface);
      --stepper-track: var(--bb-color-surface-raised);
      --row-hover: color-mix(in srgb, var(--bb-color-text-primary) 3.5%, transparent);
      --font-serif: var(--bb-font-display);
      --font-sans: var(--bb-font-ui);
      --font-mono: var(--bb-font-mono);
    }

    * { box-sizing: border-box; }
    body {
      margin: 0;
      min-height: 100vh;
      font-family: var(--font-sans, 'DM Sans', system-ui, sans-serif);
      background: var(--bb-color-background, var(--canvas));
      color: var(--text-primary);
      line-height: 1.6;
      font-size: 14px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    a { color: var(--accent); text-decoration: none; }
    a:hover { text-decoration: underline; }

    main {
      width: 100%;
      padding: 0;
      background: var(--bb-color-background, var(--canvas));
    }
    .bb-page-content {
      max-width: 56rem;
      margin: 0 auto;
      padding: 1.25rem 1.25rem 3rem;
    }
    body.app-route--book-detail {
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }
    body.app-route--book-detail main {
      flex: 1;
      min-height: 0;
      display: flex;
      flex-direction: column;
    }

    /* Full-width stepper inside main */
    .stepper {
      width: 100%;
      margin-bottom: 1.25rem;
    }
    .stepper__track {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0;
      border: 0.5px solid var(--border-subtle);
      border-radius: 8px;
      overflow: hidden;
      background: var(--stepper-track);
    }
    .stepper__track--4 {
      grid-template-columns: repeat(4, 1fr);
    }
    .stepper__item {
      padding: 0.65rem 0.5rem;
      text-align: center;
      font-size: 0.8125rem;
      font-weight: 500;
      color: var(--text-secondary);
      border-right: 0.5px solid var(--border-subtle);
    }
    .stepper__item:last-child { border-right: none; }
    .stepper__num {
      display: block;
      font-size: 0.6875rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: var(--text-secondary);
      margin-bottom: 0.15rem;
    }
    .stepper__item--active {
      background: var(--card-bg);
      color: var(--text-primary);
    }
    .stepper__item--active .stepper__num { color: var(--accent); }
    .stepper__item--done {
      color: var(--text-primary);
    }
    .stepper__item--done .stepper__num { color: var(--success); }
    .stepper__item--pending { opacity: 0.55; }

    .section-card {
      background: var(--card-bg);
      border: 0.5px solid var(--border-subtle);
      border-radius: 8px;
      margin-top: 1.25rem;
    }
    .section-card:first-of-type { margin-top: 0; }
    .section-card__head {
      padding: 1rem 1.1rem 0.85rem;
      border-bottom: 0.5px solid var(--border-subtle);
    }
    .step-pill {
      display: inline-block;
      font-size: 0.6875rem;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
      background: var(--accent-muted);
      color: var(--text-secondary);
      margin-bottom: 0.35rem;
    }
    .section-card__title {
      margin: 0;
      font-size: 1rem;
      font-weight: 600;
      font-family: var(--font-serif, 'Fraunces', Georgia, serif);
      color: var(--text-primary);
      letter-spacing: -0.01em;
    }
    .section-card__desc {
      margin: 0.4rem 0 0;
      font-size: 0.8125rem;
      color: var(--text-secondary);
      max-width: 42rem;
    }
    .section-card__body {
      padding: 1rem 1.1rem 1.1rem;
    }

    label, .label-block {
      display: block;
      font-size: 0.8125rem;
      color: var(--text-secondary);
      margin-bottom: 0.35rem;
    }
    textarea, .input-text {
      width: 100%;
      padding: 0.65rem 0.85rem;
      border: 0.5px solid var(--border-subtle);
      border-radius: 6px;
      background: var(--input-bg);
      color: var(--text-primary);
      font-size: 0.8125rem;
      resize: vertical;
      font-family: var(--font-sans, 'DM Sans', system-ui, sans-serif);
      line-height: 1.55;
    }
    textarea.mono {
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      font-size: 0.8125rem;
    }

    .btn-row {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      align-items: center;
      margin-top: 0.85rem;
    }
    .btn-row--end {
      justify-content: flex-end;
    }
    button, .btn, a.btn {
      display: inline-block;
      padding: 0.5rem 1rem;
      border: 0.5px solid var(--border);
      border-radius: 6px;
      background: transparent;
      color: var(--text-primary);
      font-size: 0.8125rem;
      font-weight: 500;
      cursor: pointer;
      font-family: var(--font-sans, 'DM Sans', system-ui, sans-serif);
      letter-spacing: 0.01em;
    }
    a.btn { text-decoration: none; }
    button:hover, .btn:hover, a.btn:hover {
      border-color: var(--accent);
      color: var(--accent);
      text-decoration: none;
    }
    button.btn-primary, .btn.btn-primary, a.btn.btn-primary {
      background: var(--text-primary);
      color: var(--card-bg);
      border-color: var(--text-primary);
    }
    button.btn-primary:hover, .btn.btn-primary:hover, a.btn.btn-primary:hover {
      opacity: 0.92;
      border-color: var(--text-primary);
      color: var(--canvas);
    }
    button.btn-danger, .btn.btn-danger {
      border-color: var(--danger-border);
      color: var(--danger);
      background: transparent;
    }
    button.btn-danger:hover {
      background: transparent;
      opacity: 0.9;
    }
    button.btn-ghost { border-color: transparent; color: var(--text-secondary); }
    button.btn-ghost:hover { border-color: var(--border); color: var(--text-primary); }

    .htmx-indicator { opacity: 0; transition: opacity 0.2s; }
    form.htmx-request .htmx-indicator { opacity: 1; }

    /* Narrative mode option cards */
    .narrative-threads-fieldset {
      border: none;
      padding: 0;
      margin: 1rem 0 0;
    }
    .narrative-threads-fieldset legend {
      font-weight: 600;
      font-size: 0.9375rem;
      color: var(--text-primary);
      padding: 0;
      margin-bottom: 0.35rem;
    }
    .nt-help {
      margin: 0 0 0.75rem;
      font-size: 0.8125rem;
      color: var(--text-secondary);
      max-width: 42rem;
    }
    .nt-cards { display: flex; flex-direction: column; gap: 0.5rem; }
    .nt-option {
      display: block;
      margin: 0;
      cursor: pointer;
    }
    .nt-option input {
      position: absolute;
      opacity: 0;
      pointer-events: none;
    }
    .nt-option__box {
      display: block;
      width: 100%;
      padding: 0.65rem 0.85rem;
      border: 0.5px solid var(--border-subtle);
      border-radius: 6px;
      background: var(--input-bg);
    }
    .nt-option__title {
      display: block;
      font-weight: 600;
      font-size: 0.8125rem;
      color: var(--text-primary);
    }
    .nt-option__desc {
      display: block;
      margin-top: 0.25rem;
      font-size: 0.75rem;
      color: var(--text-secondary);
      line-height: 1.45;
    }
    .nt-option input:focus-visible + .nt-option__box {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }
    .nt-option input:checked + .nt-option__box {
      border-color: var(--accent);
      background: var(--accent-muted);
      box-shadow: inset 0 0 0 0.5px var(--accent);
    }
    .nt-multi-panel {
      display: none;
      margin-top: 0.75rem;
      padding-top: 0.85rem;
      border-top: 0.5px solid var(--border-subtle);
    }
    .nt-lbl { font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 0.25rem; display: block; }

    table.run-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.8125rem;
    }
    table.run-table th {
      text-align: left;
      padding: 0.5rem 0.65rem;
      font-size: 0.6875rem;
      font-weight: 600;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: var(--text-secondary);
      border-bottom: 0.5px solid var(--border-subtle);
    }
    table.run-table td {
      padding: 0.55rem 0.65rem;
      border-bottom: 0.5px solid var(--border-subtle);
      vertical-align: middle;
      font-size: 0.8125rem;
    }
    table.run-table tbody tr:hover { background: var(--row-hover); }
    td.run-id {
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      font-size: 0.75rem;
    }
    td.run-datetime a { color: var(--text-primary); font-weight: 500; }
    td.run-datetime a:hover { color: var(--accent); }
    .run-id-inline {
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      font-size: 0.75rem;
      color: var(--text-secondary);
    }
    td.preview-col {
      max-width: 280px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      color: var(--text-primary);
    }
    td.actions { white-space: nowrap; }
    .actions-inner { display: flex; gap: 0.35rem; flex-wrap: wrap; align-items: center; }
    .actions-inner button,
    .actions-inner .btn,
    .actions-inner a.btn { margin-top: 0; }

    .badge {
      display: inline-block;
      font-size: 0.6875rem;
      font-weight: 600;
      padding: 0.15rem 0.45rem;
      border-radius: 4px;
    }
    .badge--success { background: var(--success-bg); color: var(--success); }
    .badge--info { background: var(--info-bg); color: var(--info); }
    .badge--warn { background: var(--warning-bg); color: var(--warning); }
    .badge--muted { color: var(--text-secondary); font-weight: 500; }
    .badge--danger {
      background: color-mix(in srgb, var(--danger) 22%, transparent);
      color: var(--danger);
    }

    .table-footnote {
      margin: 0.5rem 0 0;
      font-size: 0.75rem;
      color: var(--text-secondary);
    }

    .polish-msg { margin-top: 0; font-size: 0.8125rem; line-height: 1.45; }
    .polish-msg--neutral { color: var(--text-secondary); font-weight: 400; }
    .polish-msg--clean { color: var(--success); font-weight: 600; }
    .polish-msg--notes { color: var(--warning); font-weight: 600; }
    .polish-msg--fail { color: var(--danger); font-weight: 600; }

    .style-msg { margin-top: 0; font-size: 0.8125rem; line-height: 1.45; }
    .style-msg--neutral { color: var(--text-secondary); font-weight: 400; }
    .style-msg--clean { color: var(--success); font-weight: 600; }
    .style-msg--notes { color: var(--warning); font-weight: 600; }
    .style-msg--fail { color: var(--danger); font-weight: 600; }
    .style-radio-grid { margin: 0.25rem 0 0; font-size: 0.8125rem; line-height: 1.5; }

    ul.files { list-style: none; padding: 0; margin: 0.5rem 0 0; }
    ul.files li {
      padding: 0.35rem 0;
      border-bottom: 0.5px solid var(--border-subtle);
      font-size: 0.8125rem;
    }
    ul.files li:last-child { border-bottom: none; }

    pre.art {
      white-space: pre-wrap;
      word-break: break-word;
      font-size: 0.8125rem;
      background: var(--input-bg);
      border: 0.5px solid var(--border-subtle);
      border-radius: 6px;
      padding: 0.85rem;
      max-height: 28rem;
      overflow: auto;
    }

    .breadcrumb {
      font-size: 0.8125rem;
      color: var(--text-secondary);
      margin-bottom: 0.85rem;
    }
    .breadcrumb a { color: var(--text-secondary); }
    .breadcrumb a:hover { color: var(--accent); }
    .page-title {
      margin: 0 0 0.5rem;
      font-size: 1.25rem;
      font-weight: 600;
    }
    .danger-zone {
      margin-top: 2rem;
      padding-top: 1.25rem;
      border-top: 0.5px dashed var(--danger-border);
    }
    .empty-state {
      margin: 0;
      padding: 1rem;
      font-size: 0.8125rem;
      color: var(--text-secondary);
      border: 0.5px dashed var(--border-subtle);
      border-radius: 6px;
    }
    .empty-state--centered {
      text-align: center;
      padding: 2rem 1rem;
      border: none;
    }

    @keyframes status-dot-pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      font-size: 12px;
      font-weight: 500;
      padding: 3px 8px;
      border-radius: 4px;
      white-space: nowrap;
    }
    .status-complete {
      background: rgba(46, 125, 82, 0.08);
      color: var(--bb-status-completed, #2E7D52);
      border: 0.5px solid rgba(46, 125, 82, 0.28);
    }
    .status-active {
      background: color-mix(in srgb, var(--bb-ch-dot-prose) 8%, transparent);
      color: var(--bb-ch-dot-prose, #D97706);
    }
    .status-review {
      background: color-mix(in srgb, var(--bb-ch-dot-error) 10%, transparent);
      color: var(--bb-ch-dot-error, #C53030);
    }
    .status-generating {
      background: color-mix(in srgb, var(--bb-ch-dot-generating) 10%, transparent);
      color: var(--bb-ch-dot-generating, #C84B31);
    }
    .status-ready {
      background: transparent;
      color: var(--bb-ch-dot-pending, #8E8A85);
      border: 0.5px solid var(--bb-ch-dot-pending, #8E8A85);
    }
    .status-error {
      background: var(--color-background-danger);
      color: var(--color-text-danger);
    }
    .status-muted {
      background: transparent;
      color: var(--bb-status-not-started, #D0CBC5);
      border: 0.5px solid var(--bb-status-not-started, #D0CBC5);
    }
    .status-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: currentColor;
      display: inline-block;
      flex-shrink: 0;
    }
    .status-dot-pulse {
      animation: status-dot-pulse 1.5s ease-in-out infinite;
    }
    .htmx-indicator .status-dot-pulse,
    .book-card-gen-status--running .status-dot-pulse {
      background: var(--bb-ch-dot-generating, #C84B31);
    }

    .book-progress-wrap {
      display: inline-flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 0.35rem;
      vertical-align: middle;
    }
    .book-progress-bar {
      width: 80px;
      height: 4px;
      border-radius: 2px;
      background: var(--color-border-tertiary);
      overflow: hidden;
    }
    .book-progress-bar__fill {
      height: 100%;
      border-radius: 2px;
      background: var(--color-text-success);
      max-width: 100%;
    }
    .book-title-stack {
      display: block;
      max-width: 280px;
    }
    .book-title-stack__lead {
      display: block;
      font-weight: 600;
      color: var(--text-primary);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .book-title-stack__rest {
      display: block;
      font-size: 0.75rem;
      color: var(--text-secondary);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    details.wizard-details { margin-bottom: 0.85rem; }
    details.wizard-details > summary {
      cursor: pointer;
      font-weight: 600;
      font-size: 0.8125rem;
      color: var(--text-primary);
      padding: 0.35rem 0;
    }
    .visually-hidden {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
    }

    /* --- Phase 2: My books, book workspace, refine --- */
    .books-page-header {
      display: flex;
      flex-wrap: wrap;
      align-items: flex-start;
      justify-content: space-between;
      gap: 0.75rem;
      margin-bottom: 0.75rem;
    }
    .books-page-header__text h2 {
      margin: 0 0 0.25rem;
      font-size: 1.125rem;
      font-weight: 600;
    }
    .books-page-header__text p {
      margin: 0;
      font-size: 0.8125rem;
      color: var(--text-secondary);
      max-width: 36rem;
    }
    .books-new-panel {
      border: 0.5px solid var(--color-border-tertiary);
      border-radius: var(--border-radius-lg, 8px);
      background: var(--color-background-primary);
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .books-new-panel[hidden] {
      display: none !important;
    }
    .books-new-panel summary {
      cursor: pointer;
      padding: 0.65rem 1rem;
      font-weight: 600;
      font-size: 0.875rem;
      list-style: none;
    }
    .books-new-panel summary::-webkit-details-marker {
      display: none;
    }
    .books-new-panel .books-new-panel__body {
      padding: 0 1rem 1rem;
      border-top: 0.5px solid var(--color-border-tertiary);
    }
    .books-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 12px;
    }
    a.book-card {
      display: block;
      text-decoration: none;
      color: inherit;
      background: var(--color-background-primary);
      border: 0.5px solid var(--color-border-tertiary);
      border-radius: var(--border-radius-lg, 8px);
      padding: 1rem;
      cursor: pointer;
      transition: border-color 0.15s ease;
    }
    a.book-card:hover {
      text-decoration: none;
      border-color: var(--color-border-secondary);
    }
    .book-card-genre {
      font-size: 11px;
      font-weight: 500;
      color: var(--color-text-secondary);
      text-transform: uppercase;
      letter-spacing: 0.04em;
      margin-bottom: 4px;
    }
    .book-card-title {
      font-size: 14px;
      font-weight: 500;
      margin-bottom: 6px;
      color: var(--color-text-primary);
    }
    .book-card-preview {
      font-size: 12px;
      color: var(--color-text-secondary);
      line-height: 1.5;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin-bottom: 10px;
    }
    .book-card-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.5rem;
    }
    .progress-mini {
      display: flex;
      align-items: center;
      gap: 6px;
      min-width: 0;
    }
    .pbar {
      width: 60px;
      height: 3px;
      background: var(--color-border-tertiary);
      border-radius: 2px;
      overflow: hidden;
      flex-shrink: 0;
    }
    .pbar-fill {
      height: 100%;
      background: var(--bb-status-in-progress, #C84B31);
      border-radius: 2px;
      max-width: 100%;
    }
    .pbar-fill--complete { background: var(--bb-status-completed, #2E7D52); }
    .pbar-fill--active { background: var(--bb-ch-dot-prose, #D97706); }
    .pbar-text {
      font-size: 11px;
      color: var(--color-text-secondary);
      white-space: nowrap;
    }
    .completed-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .completed-row {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 0;
      border-bottom: 0.5px solid var(--color-border-tertiary);
    }
    .completed-row:last-child {
      border-bottom: none;
    }
    .completed-row__info {
      flex: 1;
      min-width: 0;
    }
    .completed-title {
      font-size: 13px;
      font-weight: 600;
      color: var(--color-text-primary);
    }
    .completed-meta {
      font-size: 12px;
      color: var(--color-text-secondary);
      margin-top: 0.15rem;
    }
    .btn-sm {
      font-size: 0.75rem;
      padding: 0.25rem 0.55rem;
    }
    .ch-status-approved {
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--bb-status-approved, #2E7D52);
      flex-shrink: 0;
      position: relative;
    }
    .ch-status-approved::after {
      content: "";
      position: absolute;
      left: 4px;
      top: 1px;
      width: 4px;
      height: 7px;
      border: solid var(--color-text-success);
      border-width: 0 1.5px 1.5px 0;
      transform: rotate(45deg);
    }
    .prose-card {
      background: var(--color-background-primary);
      border: 0.5px solid var(--color-border-tertiary);
      border-radius: var(--border-radius-lg, 8px);
      padding: 1.25rem;
    }
    .prose-card__head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.75rem;
      margin-bottom: 0.75rem;
    }
    .prose-card__head h3 {
      margin: 0;
      font-size: 13px;
      font-weight: 500;
    }
    .prose-rendered {
      font-size: 14px;
      font-family: var(--font-serif, 'Fraunces', Georgia, serif);
      line-height: 1.85;
      color: var(--color-text-primary);
    }
    .prose-rendered p {
      margin: 0 0 1rem;
    }
    .prose-rendered h2 {
      font-size: 14px;
      font-weight: 600;
      font-family: var(--font-sans, 'DM Sans', system-ui, sans-serif);
      color: var(--color-text-secondary);
      margin: 1.25rem 0 0.35rem;
    }
    .prose-card__foot {
      margin-top: 1rem;
      padding-top: 1rem;
      border-top: 0.5px solid var(--color-border-tertiary);
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 0.5rem;
    }
    .refine-card {
      background: var(--color-background-primary);
      border: 0.5px solid var(--color-border-tertiary);
      border-radius: var(--border-radius-lg, 8px);
      overflow: hidden;
    }
    .refine-card-hdr {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 0.75rem;
      padding: 0.875rem 1.25rem;
      border-bottom: 0.5px solid var(--color-border-tertiary);
    }
    .refine-badge-optional {
      font-size: 11px;
      font-weight: 500;
      color: var(--color-text-secondary);
      padding: 0.15rem 0.45rem;
      border-radius: 4px;
      border: 0.5px solid var(--color-border-tertiary);
    }
    .refine-card-body {
      padding: 1.25rem;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .refine-card-footer {
      padding: 0.875rem 1.25rem;
      border-top: 0.5px solid var(--color-border-tertiary);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.75rem;
      flex-wrap: wrap;
    }
    .refine-field-label {
      font-size: 12px;
      font-weight: 500;
      color: var(--color-text-secondary);
      display: block;
      margin-bottom: 0.35rem;
    }
    .chip-group {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    button.chip {
      font-family: inherit;
    }
    .chip {
      padding: 4px 10px;
      border-radius: 20px;
      border: 0.5px solid var(--color-border-secondary);
      font-size: 12px;
      cursor: pointer;
      color: var(--color-text-secondary);
      background: transparent;
    }
    .chip:hover {
      background: var(--color-background-secondary);
    }
    .chip.selected {
      border-color: var(--color-border-info);
      background: var(--color-background-info);
      color: var(--color-text-info);
    }
    .approve-bar {
      background: var(--color-background-primary);
      border: 0.5px solid var(--color-border-tertiary);
      border-radius: var(--border-radius-lg, 8px);
      padding: 1rem 1.25rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.75rem;
      flex-wrap: wrap;
    }
    .approve-bar__text {
      font-size: 13px;
      color: var(--color-text-secondary);
      max-width: 28rem;
    }
    .char-counter {
      font-size: 11px;
      color: var(--color-text-secondary);
      text-align: right;
      margin-top: 4px;
    }
    .char-counter.warning {
      color: var(--color-text-warning);
    }
    .char-counter.danger {
      color: var(--color-text-danger);
    }
    .book-detail-top {
      margin-bottom: 1rem;
    }
    .book-detail-header {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }
    .book-detail-header h1 {
      margin: 0;
      font-size: 16px;
      font-weight: 500;
    }
    .book-detail-header__spacer {
      flex: 1;
      min-width: 8px;
    }
    .settings-panel {
      margin-top: 0.75rem;
      padding: 0 0 1rem;
      border-bottom: 0.5px solid var(--color-border-tertiary);
    }
    .settings-panel[hidden] {
      display: none !important;
    }
    .empty-state-books {
      text-align: center;
      color: var(--color-text-secondary);
      padding: 2rem 1rem;
      font-size: 0.875rem;
    }

    /* Refine card — header, timing badge, “what happens”, completion (Phase 2+) */
    .refine-hdr-text {
      flex: 1;
      min-width: 0;
    }
    .refine-hdr-text .refine-card__title {
      margin: 0;
      font-size: 14px;
      font-weight: 500;
    }
    .refine-hdr-desc {
      margin: 0.35rem 0 0;
      font-size: 12px;
      line-height: 1.4;
      color: var(--color-text-secondary);
    }
    .refine-hdr-meta {
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 0.4rem;
      flex-shrink: 0;
    }
    .refine-hdr-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      font-size: 11px;
      font-weight: 500;
      padding: 0.2rem 0.5rem;
      border-radius: var(--border-radius-md, 6px);
      max-width: 14rem;
      text-align: right;
      line-height: 1.3;
    }
    .refine-hdr-badge.timing-active {
      color: var(--color-text-success);
      background: var(--color-background-success);
      border: 0.5px solid color-mix(in srgb, var(--color-text-success) 35%, transparent);
    }
    .refine-hdr-badge.timing-active .status-dot {
      flex-shrink: 0;
    }
    .refine-hdr-badge.timing-done {
      color: var(--color-text-secondary);
      background: transparent;
      border: 0.5px solid var(--color-border-tertiary);
      font-weight: 400;
    }
    .refine-hdr-badge.timing-done .status-dot {
      display: none;
    }
    .refine-what-happens {
      padding: 0.75rem 1.25rem;
      border-bottom: 0.5px solid var(--color-border-tertiary);
      background: var(--color-background-secondary);
    }
    .refine-what-label {
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--color-text-secondary);
      display: block;
      margin-bottom: 0.5rem;
    }
    .refine-steps {
      margin: 0;
      padding-left: 1.1rem;
      font-size: 12px;
      color: var(--color-text-secondary);
      line-height: 1.45;
    }
    .refine-step {
      margin: 0.15rem 0;
    }
    .refine-footer-left {
      flex: 1;
      min-width: 0;
    }
    .refine-footer-note {
      margin: 0;
      font-size: 12px;
      color: var(--color-text-secondary);
      max-width: 22rem;
    }
    .refine-running-msg {
      margin: 0.5rem 0 0;
      font-size: 12px;
      color: var(--color-text-secondary);
      max-width: 22rem;
    }
    .refine-run-btn {
      position: relative;
    }
    .refine-run-btn:disabled {
      opacity: 0.45;
      cursor: not-allowed;
    }
    .refine-run-btn:disabled:hover::after {
      content: attr(title);
      position: absolute;
      bottom: 100%;
      left: 50%;
      transform: translateX(-50%);
      background: var(--color-background-secondary, #333);
      color: var(--text-primary, #fff);
      font-size: 0.75rem;
      padding: 0.25rem 0.5rem;
      border-radius: 4px;
      white-space: nowrap;
      pointer-events: none;
      margin-bottom: 4px;
      z-index: 10;
    }
    .refine-footer-actions {
      flex-shrink: 0;
    }
    .field-hint {
      margin: 0.35rem 0 0;
      font-size: 11px;
      color: var(--color-text-secondary);
      line-height: 1.35;
    }
    .refine-card.refine-card--complete .refine-what-happens,
    .refine-card.refine-card--complete .refine-card-body,
    .refine-card.refine-card--complete .refine-card-footer {
      display: none !important;
    }
    .refine-completion {
      padding: 1rem 1.25rem 1.15rem;
      border-top: 0.5px solid var(--color-border-tertiary);
      background: var(--color-background-success);
    }
    .refine-completion[hidden] {
      display: none !important;
    }
    .refine-completion-title {
      margin: 0;
      font-size: 14px;
      font-weight: 600;
      color: var(--color-text-success);
    }
    .refine-completion-desc {
      margin: 0.4rem 0 0.85rem;
      font-size: 12px;
      line-height: 1.45;
      color: var(--color-text-success);
      opacity: 0.88;
    }
    .refine-completion-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      align-items: center;
    }
    .refine-dl-link {
      border: none !important;
      background: transparent !important;
      color: var(--color-text-success) !important;
      box-shadow: none !important;
      text-decoration: underline;
      text-underline-offset: 2px;
      padding: 0.25rem 0.35rem !important;
    }
    .refine-dl-link:hover {
      opacity: 0.9;
    }

    /* ── Top nav & book workspace (bb-*) — matches Editor's Chair ec-topnav ── */
    .bb-topnav {
      height: 52px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      gap: 16px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      background: var(--ink);
      flex-shrink: 0;
      overflow: visible;
    }
    .bb-brand {
      font-size: 18px;
      line-height: 1;
      font-weight: 600;
      font-family: var(--bb-font-display, "Playfair Display", Georgia, serif);
      color: #F0EDE8;
      text-decoration: none;
      margin-right: 0;
      white-space: nowrap;
      letter-spacing: -0.01em;
      flex-shrink: 0;
    }
    .bb-brand:hover {
      text-decoration: none;
      color: #fff;
    }
    .bb-topnav-left {
      display: flex;
      align-items: center;
      gap: 12px;
      min-width: 0;
      flex: 1 1 auto;
    }
    /* Context badge row — shared with Editor's Chair (ec-header-* aliases same rules) */
    .bb-nav-context-badge,
    .ec-header-mode {
      flex-shrink: 0;
      font-family: var(--bb-font-ui, 'DM Sans', system-ui, sans-serif);
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: rgba(240, 237, 232, 0.45);
      padding: 3px 8px;
      border: 1px solid rgba(255, 255, 255, 0.14);
      border-radius: 3px;
    }
    .bb-nav-context-sep,
    .ec-header-sep {
      width: 1px;
      height: 20px;
      background: rgba(255, 255, 255, 0.12);
      flex-shrink: 0;
    }
    .bb-nav-context-title,
    .ec-header-title {
      font-family: var(--bb-font-display, "Playfair Display", Georgia, serif);
      font-style: italic;
      font-size: 15px;
      color: var(--cream);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      min-width: 0;
    }
    .bb-topnav-right {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
      margin-left: auto;
      overflow: visible;
    }
    .bb-nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 20px;
      flex: 0 0 auto;
      overflow: visible;
    }
    .bb-nav-link {
      position: relative;
      display: inline-flex;
      align-items: center;
      height: 52px;
      padding: 0;
      border-radius: 0;
      font-size: 13px;
      line-height: 1;
      font-family: var(--bb-font-ui, 'DM Sans', system-ui, sans-serif);
      color: rgba(240, 237, 232, 0.62);
      text-decoration: none;
      white-space: nowrap;
      font-weight: 400;
      letter-spacing: 0.01em;
    }
    .bb-nav-link::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 2px;
      background: var(--bb-color-accent, var(--accent));
      opacity: 0;
      transition: opacity var(--bb-transition-fast, 0.1s ease);
    }
    .bb-nav-link:hover {
      background: transparent;
      color: #F0EDE8;
      text-decoration: none;
    }
    .bb-nav-link:hover::after { opacity: 1; }
    .bb-nav-link--active {
      background: transparent;
      color: var(--bb-color-accent, var(--accent));
      font-weight: 500;
    }
    .bb-nav-link--active::after { opacity: 1; }
    .bb-nav-sep {
      color: rgba(240, 237, 232, 0.28);
      font-size: 13px;
      line-height: 1;
      user-select: none;
      flex-shrink: 0;
    }
    /* Vertical divider between nav groups (Authenticated Nav Cleanup) */
    .bb-nav-divider {
      width: 1px;
      height: 20px;
      background: rgba(255, 255, 255, 0.12);
      flex-shrink: 0;
    }
    /* Desktop only: separate core marketing links from Learn resources */
    @media (max-width: 900px) {
      .bb-nav-divider--learn {
        display: none;
      }
    }
    /* Learn dropdown (marketing nav) — class-based open state only.
       Do not use the HTML [hidden] attribute: UA styles use display:none !important. */
    .bb-nav-dropdown {
      position: relative;
      display: inline-flex;
      align-items: center;
      height: 52px;
    }
    /* Button reset only — keep .bb-nav-link color/font (inherit would override them). */
    .bb-nav-dropdown__trigger {
      background: none;
      border: none;
      cursor: pointer;
      gap: 4px;
      padding: 0;
      color: rgba(240, 237, 232, 0.62);
    }
    .bb-nav-dropdown__trigger:hover,
    .bb-nav-dropdown:hover .bb-nav-dropdown__trigger,
    .bb-nav-dropdown.is-open .bb-nav-dropdown__trigger {
      color: #F0EDE8;
    }
    .bb-nav-dropdown__trigger.bb-nav-link--active {
      color: var(--bb-color-accent, var(--accent));
    }
    .bb-nav-dropdown__caret {
      font-size: 10px;
      opacity: 0.7;
      transition: transform 0.15s ease;
    }
    .bb-nav-dropdown.is-open .bb-nav-dropdown__caret,
    .bb-nav-dropdown:hover .bb-nav-dropdown__caret {
      transform: rotate(180deg);
    }
    .bb-nav-dropdown__menu {
      display: none;
      position: absolute;
      top: 100%;
      right: 0;
      left: auto;
      min-width: 190px;
      padding: 6px 0;
      margin: 0;
      background: #241F1B;
      border: 0.5px solid rgba(255, 255, 255, 0.12);
      border-radius: 6px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
      z-index: 300;
      text-align: left;
    }
    .bb-nav-dropdown:hover .bb-nav-dropdown__menu,
    .bb-nav-dropdown:focus-within .bb-nav-dropdown__menu,
    .bb-nav-dropdown.is-open .bb-nav-dropdown__menu {
      display: block;
    }
    .bb-nav-dropdown__item {
      display: block;
      padding: 8px 14px;
      font-family: var(--bb-font-ui, 'DM Sans', system-ui, sans-serif);
      font-size: 13px;
      color: rgba(240, 237, 232, 0.78);
      text-decoration: none;
      white-space: nowrap;
    }
    .bb-nav-dropdown__item:hover {
      background: rgba(255, 255, 255, 0.06);
      color: #F0EDE8;
      text-decoration: none;
    }
    .bb-nav-dropdown__item--active {
      color: var(--bb-color-accent, #C84B31);
    }
    .btn-nav-write {
      font-family: var(--bb-font-ui, 'DM Sans', system-ui, sans-serif);
      font-size: 13px;
      font-weight: 500;
      background: var(--bb-color-accent, #C84B31);
      color: #fff;
      border: none;
      border-radius: 4px;
      padding: 6px 14px;
      cursor: pointer;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      white-space: nowrap;
      flex-shrink: 0;
      transition: opacity 0.15s ease;
    }
    .btn-nav-write:hover {
      opacity: 0.85;
      text-decoration: none;
      color: #fff;
    }
    .btn-nav-back {
      font-family: var(--bb-font-ui, 'DM Sans', system-ui, sans-serif);
      font-size: 12px;
      background: rgba(255, 255, 255, 0.08);
      color: #F0EDE8;
      border: none;
      border-radius: 4px;
      padding: 5px 12px;
      cursor: pointer;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      white-space: nowrap;
      flex-shrink: 0;
      transition: background 0.15s ease;
    }
    .btn-nav-back:hover {
      background: rgba(255, 255, 255, 0.14);
      text-decoration: none;
      color: #F0EDE8;
    }
    /* Avatar / account menu */
    .nav-avatar {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: rgba(200, 75, 49, 0.18);
      border: 0.5px solid rgba(200, 75, 49, 0.45);
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--bb-font-ui, 'DM Sans', system-ui, sans-serif);
      font-size: 11px;
      font-weight: 500;
      color: var(--bb-color-accent, #C84B31);
      cursor: pointer;
      position: relative;
      flex-shrink: 0;
      user-select: none;
    }
    .nav-avatar:focus-visible {
      outline: 2px solid var(--bb-color-accent, #C84B31);
      outline-offset: 2px;
    }
    .nav-dropdown {
      position: absolute;
      top: calc(100% + 8px);
      right: 0;
      background: #241F1B;
      border: 0.5px solid rgba(255, 255, 255, 0.12);
      border-radius: 6px;
      min-width: 200px;
      padding: 6px 0;
      z-index: 200;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
      text-align: left;
    }
    .dropdown-section-label {
      font-family: var(--bb-font-ui, 'DM Sans', system-ui, sans-serif);
      font-size: 10px;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: rgba(240, 237, 232, 0.4);
      padding: 8px 14px 4px;
    }
    .dropdown-item {
      display: block;
      font-family: var(--bb-font-ui, 'DM Sans', system-ui, sans-serif);
      font-size: 13px;
      font-weight: 400;
      color: rgba(240, 237, 232, 0.75);
      padding: 7px 14px;
      text-decoration: none;
      cursor: pointer;
    }
    .dropdown-item:hover {
      background: rgba(255, 255, 255, 0.05);
      color: #F0EDE8;
      text-decoration: none;
    }
    .dropdown-item:focus-visible {
      outline: 1px solid var(--bb-color-accent, #C84B31);
      outline-offset: -1px;
    }
    .dropdown-item-danger { color: #e07070; }
    .dropdown-item-danger:hover { color: #f08080; }
    .dropdown-divider {
      height: 0.5px;
      background: rgba(255, 255, 255, 0.08);
      margin: 6px 0;
    }
    .bb-workspace {
      display: grid;
      grid-template-columns: 210px 1fr 250px;
      height: calc(100vh - 52px);
      overflow: hidden;
    }
    .bb-ch-panel {
      position: relative;
      border-right: 0.5px solid var(--border-subtle);
      background: var(--card-bg);
      display: flex;
      flex-direction: column;
      overflow: hidden;
    }
    .bb-ch-panel-head {
      padding: 12px 12px 10px;
      border-bottom: 0.5px solid var(--border-subtle);
      flex-shrink: 0;
    }
    .bb-book-title {
      font-size: 14px;
      font-weight: 600;
      font-family: var(--font-serif, 'Fraunces', Georgia, serif);
      color: var(--text-primary);
      margin: 0 0 3px;
      line-height: 1.3;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      letter-spacing: -0.01em;
    }
    .bb-book-status {
      display: inline-block;
      font-size: 10px;
      padding: 2px 7px;
      border-radius: 3px;
      font-weight: 500;
      margin-bottom: 8px;
    }
    .bb-book-status--progress { background: rgba(200, 75, 49, 0.06); color: var(--bb-status-in-progress, #C84B31); }
    .bb-book-status--complete { background: rgba(46, 125, 82, 0.08); color: var(--bb-status-completed, #2E7D52); }
    .bb-ch-prog-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 5px;
    }
    .bb-ch-section-label {
      font-size: 10px;
      font-weight: 500;
      color: var(--text-secondary);
      text-transform: uppercase;
      letter-spacing: .04em;
    }
    .bb-ch-prog-label { font-size: 10px; color: var(--text-secondary); }
    .bb-progress-bar {
      height: 2px;
      background: var(--border-subtle);
      border-radius: 1px;
    }
    .bb-progress-fill {
      height: 100%;
      background: var(--success);
      border-radius: 1px;
      max-width: 100%;
    }
    .bb-ch-list {
      flex: 1;
      min-height: 0; /* let list shrink in flex column so overflow-y can scroll */
      overflow-y: auto;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .bb-ch-item {
      display: flex;
      align-items: center;
      gap: 7px;
      padding: 8px 12px;
      cursor: pointer;
      font-size: 11px;
      color: var(--text-secondary);
      border-bottom: 0.5px solid var(--border-subtle);
      text-decoration: none;
      border-left: 2px solid transparent;
    }
    .bb-ch-item:last-child { border-bottom: none; }
    .bb-ch-item:hover { background: var(--row-hover); text-decoration: none; color: var(--text-secondary); }
    .bb-ch-item--active {
      background: var(--accent-muted);
      border-left-color: var(--accent);
      color: var(--text-primary);
      font-weight: 500;
    }
    .bb-ch-item--active:hover { background: var(--accent-muted); }
    .bb-ch-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      flex-shrink: 0;
    }
    .bb-dot-approved { background: var(--bb-ch-dot-approved, #2E7D52); }
    .bb-dot-prose { background: var(--bb-ch-dot-prose, #D97706); }
    .bb-dot-beats { background: var(--bb-ch-dot-beats, #2563EB); }
    .bb-dot-pending {
      background: transparent;
      border: 1px solid var(--bb-ch-dot-pending, #8E8A85);
    }
    .bb-dot-error { background: var(--bb-ch-dot-error, #C53030); }
    .bb-ch-dot--pulse {
      background: var(--bb-ch-dot-generating, #C84B31);
      box-shadow: 0 0 0 0 color-mix(in srgb, var(--bb-ch-dot-generating) 50%, transparent);
      animation: status-dot-pulse 1.5s ease-in-out infinite;
    }
    .bb-ch-name {
      flex: 1;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      line-height: 1.3;
    }
    .bb-ch-num { font-size: 10px; color: var(--text-secondary); flex-shrink: 0; }
    .bb-ch-panel-foot {
      padding: 10px 12px;
      border-top: 0.5px solid var(--border-subtle);
      flex-shrink: 0;
    }
    .bb-meta-row {
      font-size: 10px;
      color: var(--text-secondary);
      display: flex;
      justify-content: space-between;
      margin-bottom: 3px;
    }
    .bb-meta-val { color: var(--text-primary); }
    .bb-foot-btn {
      display: block;
      width: 100%;
      padding: 5px 8px;
      margin-top: 6px;
      background: transparent;
      color: var(--text-secondary);
      border: 0.5px solid var(--border-subtle);
      border-radius: 4px;
      font-size: 11px;
      cursor: pointer;
      font-family: inherit;
      text-align: center;
    }
    .bb-foot-btn:hover { background: var(--row-hover); color: var(--text-primary); border-color: var(--border); }
    /* Book settings sheet: anchored to bottom of left column (parent is position: relative) */
    .bb-settings-panel {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      width: 100%;
      box-sizing: border-box;
      max-height: min(80vh, 520px);
      overflow-y: auto;
      padding: 12px;
      z-index: 50;
      background: var(--card-bg);
      border: 0.5px solid var(--border-subtle);
      border-radius: 8px 8px 0 0;
      box-shadow: 0 -6px 28px rgba(0, 0, 0, 0.28);
    }
    .bb-center {
      display: flex;
      flex-direction: column;
      overflow: hidden;
      background: var(--card-bg);
      border-right: 0.5px solid var(--border-subtle);
    }
    .bb-center-head {
      padding: 12px 18px 0;
      border-bottom: 0.5px solid var(--border-subtle);
      flex-shrink: 0;
    }
    .bb-center-title-row {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 4px;
    }
    .bb-center-title {
      font-size: 16px;
      font-weight: 600;
      font-family: var(--font-serif, 'Fraunces', Georgia, serif);
      color: var(--text-primary);
      margin: 0;
      letter-spacing: -0.01em;
    }
    .bb-center-badge {
      font-size: 10px;
      padding: 2px 7px;
      border-radius: 3px;
      font-weight: 500;
      flex-shrink: 0;
    }
    .bb-badge-beats { background: color-mix(in srgb, var(--bb-ch-dot-beats) 10%, transparent); color: var(--bb-ch-dot-beats); }
    .bb-badge-prose { background: color-mix(in srgb, var(--bb-ch-dot-prose) 10%, transparent); color: var(--bb-ch-dot-prose); }
    .bb-badge-approved { background: color-mix(in srgb, var(--bb-ch-dot-approved) 10%, transparent); color: var(--bb-ch-dot-approved); }
    .bb-badge-pending { background: transparent; color: var(--bb-status-not-started, #D0CBC5); border: 0.5px solid var(--bb-status-not-started, #D0CBC5); }
    .bb-center-meta {
      font-size: 11px;
      color: var(--text-secondary);
      margin-bottom: 8px;
    }
    .bb-content-tabs {
      display: flex;
      gap: 0;
      margin-bottom: -0.5px;
    }
    .bb-content-tab {
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
      font-size: 12px;
      padding: 7px 14px;
      cursor: pointer;
      color: var(--text-secondary);
      border-bottom: 2px solid transparent;
      text-decoration: none;
      font-family: inherit;
      background: none;
      border-top: none;
      border-left: none;
      border-right: none;
    }
    .bb-content-tab:hover { color: var(--text-primary); text-decoration: none; }
    .bb-content-tab--active {
      color: var(--accent);
      border-bottom-color: var(--accent);
      font-weight: 500;
    }
    .bb-tab-dot {
      display: inline-block;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      margin-left: 5px;
      vertical-align: middle;
      flex-shrink: 0;
    }
    .bb-tab-dot--done { background: var(--bb-ch-dot-approved, #2E7D52); }
    .bb-tab-dot--ready { background: var(--bb-ch-dot-prose, #D97706); }
    .bb-tab-dot--warn { background: var(--bb-ch-dot-error, #C53030); }
    .bb-tab-dot--pending { background: transparent; border: 1px solid var(--bb-ch-dot-pending, #8E8A85); }
    .bb-tab-dot--running {
      background: var(--bb-ch-dot-generating, #C84B31);
      animation: status-dot-pulse 1.5s ease-in-out infinite;
    }
    .bb-center-body {
      flex: 1;
      overflow-y: auto;
      padding: 14px 18px;
    }
    .bb-workflow {
      display: flex;
      flex-direction: column;
      overflow: hidden;
      background: var(--card-bg);
    }
    .bb-workflow-editorial {
      flex: 0 1 auto;
      max-height: min(40vh, 360px);
      min-height: 0;
      overflow-y: auto;
      padding: 10px 12px;
      border-bottom: 0.5px solid var(--border-subtle);
      background: var(--header-bg, var(--card-bg));
      font-size: 11px;
    }
    .bb-workflow > script {
      display: none;
    }
    .bb-wf-head {
      padding: 10px 12px;
      border-bottom: 0.5px solid var(--border-subtle);
      flex-shrink: 0;
    }
    .bb-wf-title {
      font-size: 12px;
      font-weight: 500;
      color: var(--text-primary);
      margin: 0 0 1px;
    }
    .bb-wf-step { font-size: 11px; color: var(--accent); }
    .bb-steps {
      flex: 1;
      min-height: 0;
      overflow-y: auto;
      padding: 10px 12px;
    }
    .bb-step {
      display: flex;
      gap: 8px;
      position: relative;
    }
    .bb-step:not(:last-child)::after {
      content: '';
      position: absolute;
      left: 9px;
      top: 21px;
      width: 1px;
      height: calc(100% - 5px);
      background: var(--border-subtle);
    }
    .bb-step-icon {
      width: 18px;
      height: 18px;
      border-radius: 50%;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 9px;
      font-weight: 500;
      z-index: 1;
      margin-top: 1px;
    }
    .bb-step--done .bb-step-icon { background: var(--bb-status-approved, #2E7D52); color: var(--card-bg); }
    .bb-step--active .bb-step-icon { background: var(--bb-status-in-progress, #C84B31); color: var(--canvas); }
    .bb-step--pending .bb-step-icon {
      background: transparent;
      color: var(--bb-status-not-started, #D0CBC5);
      border: 0.5px solid var(--bb-status-not-started, #D0CBC5);
    }
    .bb-step-content { padding: 1px 0 12px; }
    .bb-step-name {
      font-size: 12px;
      font-family: var(--font-sans, 'DM Sans', system-ui, sans-serif);
      line-height: 1.35;
      letter-spacing: 0.01em;
    }
    .bb-step--done .bb-step-name { color: var(--text-secondary); }
    .bb-step--active .bb-step-name { color: var(--accent); font-weight: 500; }
    .bb-step--pending .bb-step-name { color: var(--text-secondary); }
    .bb-wf-action {
      padding: 10px 12px;
      border-top: 0.5px solid var(--border-subtle);
      flex-shrink: 0;
    }
    .bb-action-primary {
      display: block;
      width: 100%;
      padding: 7px;
      background: var(--text-primary);
      color: var(--canvas);
      border: none;
      border-radius: 5px;
      font-size: 12px;
      font-weight: 500;
      cursor: pointer;
      font-family: inherit;
      margin-bottom: 5px;
      text-align: center;
    }
    .bb-action-primary:hover { opacity: 0.9; }
    a.bb-action-primary { text-decoration: none; color: var(--canvas); box-sizing: border-box; }
    .bb-action-ghost {
      display: block;
      width: 100%;
      padding: 5px;
      background: none;
      color: var(--text-secondary);
      border: 0.5px solid var(--border-subtle);
      border-radius: 4px;
      font-size: 11px;
      cursor: pointer;
      font-family: inherit;
      margin-bottom: 4px;
      text-align: center;
    }
    .bb-action-ghost:hover { background: var(--row-hover); }
    .bb-action-note {
      font-size: 10px;
      color: var(--text-secondary);
      text-align: center;
      line-height: 1.4;
      margin: 0;
    }
    .bb-action-note--warn { color: var(--warn, #b8860b); }
    .bb-action-primary--warn {
      background: var(--warn, #b8860b) !important;
      border-color: var(--warn, #b8860b) !important;
    }
    .bb-banner {
      margin: 0 0 0.75rem;
      padding: 0.75rem 0.9rem;
      border-radius: 6px;
      font-size: 0.875rem;
      line-height: 1.45;
    }
    .bb-banner--warn {
      border: 0.5px solid var(--warn, #b8860b);
      background: rgba(180, 134, 11, 0.08);
    }
    .bb-action-secondary {
      display: inline-block;
      padding: 4px 10px;
      background: var(--header-bg);
      color: var(--text-primary);
      border: 0.5px solid var(--border-subtle);
      border-radius: 4px;
      font-size: 12px;
      font-weight: 500;
      cursor: pointer;
      font-family: inherit;
    }
    .bb-action-secondary:hover { background: var(--row-hover); }
    .bb-quality-banner {
      margin: 0 0 0.75rem;
      padding: 0.75rem 0.9rem;
      border-radius: 6px;
      font-size: 0.875rem;
      line-height: 1.45;
    }
    .bb-quality-banner--fail {
      border: 0.5px solid var(--danger);
      background: rgba(220, 53, 69, 0.08);
    }
    .bb-quality-banner--warn {
      border: 0.5px solid var(--warn, #b8860b);
      background: rgba(180, 134, 11, 0.08);
    }
    .bb-quality-banner--pass {
      border: 0.5px solid var(--border-subtle);
      background: var(--header-bg);
      color: var(--text-secondary);
    }
    .bb-violation-list { margin: 0.5rem 0 0; padding-left: 1.1rem; }
    .bb-violation { margin-bottom: 0.45rem; }
    .bb-violation__loc { display: block; font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 0.15rem; }
    .bb-violation__desc { display: block; }
    .bb-violation__fix { display: block; font-size: 0.8125rem; color: var(--text-secondary); margin-top: 0.2rem; }
    .bb-quality-note { margin: 0.65rem 0 0; font-size: 0.8125rem; color: var(--text-secondary); }
    .bb-violation-warnings { margin-top: 0.5rem; }
    .bb-inj-card {
      background: var(--header-bg);
      border-radius: 4px;
      padding: 6px 8px;
      margin-bottom: 4px;
    }
    .bb-inj-beat { font-size: 9px; color: var(--text-secondary); margin-bottom: 2px; }
    .bb-inj-text { font-size: 11px; color: var(--text-primary); line-height: 1.4; margin-bottom: 4px; }
    .bb-inj-btns { display: flex; gap: 3px; }
    .bb-inj-btn {
      font-size: 10px;
      padding: 2px 7px;
      border-radius: 3px;
      cursor: pointer;
      border: 0.5px solid var(--border-subtle);
      background: var(--card-bg);
      color: var(--text-secondary);
      font-family: inherit;
    }
    .bb-inj-btn--approve { background: var(--success-bg); color: var(--success); border-color: var(--success); }