/* ──────────────────────────────────────────────────────────────────────
     Drift-2b — Level 1 Drift Overview heatmap
     Fourth peer sub-view inside #view-services (sibling of
     #services-catalogue-view, #services-record-view, #services-map-view).
     Renders a matrix of governed entities (rows) × V1 drift types
     (columns) showing the latest rolled-up detector status.

     Status colour usage is token-based so the dark and light themes
     stay legible without redeclaring hexes. The single token reuse
     called out below is technical debt; introduce a dedicated
     --warning token in a later tranche and replace the
     --gmap-type-coverage reference in .drift-status-warning.
     ────────────────────────────────────────────────────────────── */

  .drift-overview {
    padding: 0;
  }

  /* ── Catalogue header — Drift entry-point button row ─────────────── */
  /* The catalogue header previously held only the title + subtitle +
     search input stacked vertically. Drift-2b adds a single
     right-aligned action button ("Drift Overview"); the new
     header-row wrapper aligns title block and action block on a
     single horizontal line. Defined here (not in services.css)
     because the wrapper classes were introduced by Drift-2b. */
  .services-catalogue-header-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
  }
  .services-catalogue-header-titles {
    min-width: 0;
    flex: 1 1 auto;
  }
  .services-catalogue-header-actions {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  /* ── Header ──────────────────────────────────────────────────────── */

  .drift-overview-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
  }
  .drift-overview-header-titles {
    min-width: 0;
  }
  .drift-overview-title {
    font-size: 22px;
    font-weight: 700;
    font-family: var(--font-display);
    color: var(--on-surface);
    letter-spacing: -0.01em;
    margin-bottom: 4px;
  }
  .drift-overview-subtitle {
    font-size: 12px;
    color: var(--slate-500);
  }
  .drift-overview-back {
    background: transparent;
    border: 0;
    color: var(--on-surface-variant);
    font-size: 12px;
    font-family: inherit;
    padding: 6px 0;
    cursor: pointer;
    margin-bottom: 8px;
  }
  .drift-overview-back:hover { color: var(--on-surface); }

  /* ── Summary chips ──────────────────────────────────────────────── */

  .drift-overview-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 10px;
    margin-bottom: 14px;
  }
  .drift-overview-summary-chip {
    font-size: 11px;
    font-family: var(--font-mono);
    padding: 3px 8px;
    border-radius: var(--radius-tight);
    border: var(--border-hairline);
    background: var(--surface-container);
    color: var(--on-surface-variant);
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .drift-overview-summary-chip-count {
    font-weight: 700;
    color: var(--on-surface);
  }
  .drift-overview-summary-chip[data-status="healthy"]                   { border-color: var(--secondary); }
  .drift-overview-summary-chip[data-status="warning"]                   { border-color: var(--gmap-type-coverage); }
  .drift-overview-summary-chip[data-status="breached"]                  { border-color: var(--error); }
  .drift-overview-summary-chip[data-status="unknown_insufficient_data"] { border-color: var(--outline); border-style: dashed; }
  .drift-overview-summary-chip[data-status="unknown_detector_error"]    { border-color: var(--error); border-style: dashed; }

  /* ── Synthetic-data badge ───────────────────────────────────────── */

  .drift-synthetic-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-family: var(--font-mono);
    padding: 4px 10px;
    border-radius: var(--radius-tight);
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    border: 1px dashed var(--outline-variant);
    margin-bottom: 12px;
  }
  .drift-synthetic-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-pip);
    background: var(--gmap-type-coverage);
    display: inline-block;
  }

  /* ── Toolbar / filters ──────────────────────────────────────────── */

  .drift-overview-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    margin-bottom: 12px;
  }
  .drift-overview-search {
    flex: 1 1 220px;
    min-width: 180px;
    padding: 7px 10px;
    background: var(--surface-container-lowest);
    border: 0;
    border-bottom: 2px solid var(--outline-variant);
    color: var(--on-surface);
    font-size: 12px;
    font-family: inherit;
  }
  .drift-overview-search:focus {
    outline: none;
    border-bottom-color: var(--primary);
  }

  /* ── Heatmap matrix ─────────────────────────────────────────────── */

  .drift-heatmap {
    display: grid;
    grid-template-columns: minmax(260px, 1.4fr) repeat(9, minmax(56px, 1fr));
    gap: 1px;
    background: var(--outline-variant);
    border: var(--border-hairline);
    border-radius: var(--radius-panel);
    overflow: hidden;
  }
  .drift-heatmap-cell-header,
  .drift-heatmap-entity,
  .drift-heatmap-cell {
    background: var(--surface-container-low);
    padding: 8px 10px;
    font-size: 11px;
    line-height: 1.35;
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  .drift-heatmap-cell-header {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 10px;
    color: var(--slate-400);
    background: var(--surface-container);
    justify-content: center;
    text-align: center;
  }
  .drift-heatmap-row {
    display: contents;
  }
  .drift-heatmap-entity {
    position: sticky;
    left: 0;
    background: var(--surface-container);
    border-right: 1px solid var(--outline-variant);
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }
  .drift-heatmap-entity-name {
    font-family: var(--font-display);
    font-size: 12px;
    color: var(--on-surface);
    font-weight: 600;
    word-break: break-word;
  }
  .drift-heatmap-entity-meta {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--slate-500);
  }
  .drift-heatmap-cell {
    justify-content: center;
    cursor: pointer;
    transition: filter 0.12s;
  }
  .drift-heatmap-cell:hover,
  .drift-heatmap-cell:focus {
    outline: 2px solid var(--primary);
    outline-offset: -2px;
    filter: brightness(1.05);
  }
  .drift-heatmap-cell-glyph {
    width: 14px;
    height: 14px;
    border-radius: var(--radius-tight);
    display: inline-block;
  }

  /* ── Status cell states ─────────────────────────────────────────── */

  /* Five-band detector status plus the empty-cell state. The two
     unknown variants are deliberately distinct: insufficient_data is
     a wait / cold-start signal; detector_error is a diagnostic
     failure. Operators triage them differently — there is no single
     unknown status. */

  .drift-status-healthy {
    background: var(--secondary-container);
    color: var(--on-secondary);
  }
  .drift-status-healthy .drift-heatmap-cell-glyph {
    background: var(--secondary);
  }

  /* Reuses --gmap-type-coverage; introduce a dedicated --warning token
     in a future tranche. */
  .drift-status-warning {
    background: color-mix(in srgb, var(--gmap-type-coverage) 18%, var(--surface-container-low));
    color: var(--on-surface);
  }
  .drift-status-warning .drift-heatmap-cell-glyph {
    background: var(--gmap-type-coverage);
  }

  .drift-status-breached {
    background: var(--error-container);
    color: var(--on-surface);
  }
  .drift-status-breached .drift-heatmap-cell-glyph {
    background: var(--error);
  }

  .drift-status-unknown-insufficient-data {
    background: var(--surface-container-low);
    color: var(--on-surface-variant);
    box-shadow: inset 0 0 0 1px var(--outline-variant);
  }
  .drift-status-unknown-insufficient-data .drift-heatmap-cell-glyph {
    background: transparent;
    border: 1px dashed var(--outline);
  }

  .drift-status-unknown-detector-error {
    background: color-mix(in srgb, var(--error) 10%, var(--surface-container-low));
    color: var(--on-surface);
    box-shadow: inset 0 0 0 1px var(--error);
  }
  .drift-status-unknown-detector-error .drift-heatmap-cell-glyph {
    background: transparent;
    border: 1px dashed var(--error);
  }

  .drift-status-empty {
    background: var(--surface-container-lowest);
    color: var(--slate-500);
    cursor: default;
  }
  .drift-status-empty .drift-heatmap-cell-glyph {
    display: none;
  }
  .drift-status-empty:hover,
  .drift-status-empty:focus {
    outline: none;
    filter: none;
  }

  /* ── Cell detail / tooltip ──────────────────────────────────────── */

  .drift-heatmap-detail {
    margin-top: 12px;
    padding: 12px 14px;
    background: var(--surface-container);
    border: var(--border-hairline);
    border-radius: var(--radius-panel);
    font-size: 12px;
    color: var(--on-surface);
    min-height: 48px;
  }
  .drift-heatmap-detail[hidden] { display: none; }
  .drift-heatmap-detail-header {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    align-items: baseline;
    margin-bottom: 8px;
  }
  .drift-heatmap-detail-title {
    font-weight: 700;
    color: var(--on-surface);
  }
  .drift-heatmap-detail-meta {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--slate-500);
  }
  .drift-heatmap-detail-fields {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 4px 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--on-surface-variant);
  }
  .drift-heatmap-detail-fields .key {
    color: var(--slate-500);
    margin-right: 6px;
  }

  /* ── Status / empty / error strips ──────────────────────────────── */

  .drift-overview-state {
    background: var(--surface-container);
    border: var(--border-hairline);
    border-radius: var(--radius-panel);
    padding: 18px 20px;
    font-size: 12px;
    color: var(--on-surface-variant);
    line-height: 1.5;
    margin-bottom: 12px;
  }
  .drift-overview-state strong {
    color: var(--on-surface);
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
  }
  .drift-overview-state.is-error {
    border-left: 4px solid var(--error);
  }
  .drift-overview-state.is-empty {
    border-left: 4px solid var(--outline);
  }
  .drift-overview-state.is-partial {
    border-left: 4px solid var(--gmap-type-coverage);
  }
  .drift-overview-state.is-allhealthy {
    border-left: 4px solid var(--secondary);
  }
  .drift-overview-state.is-allempty {
    border-left: 4px solid var(--outline-variant);
    text-align: center;
  }

  /* ── Light-mode overrides ───────────────────────────────────────── */

  :root[data-theme="light"] .drift-heatmap-cell-header {
    color: var(--on-surface-variant);
    background: var(--surface-container);
  }
  :root[data-theme="light"] .drift-heatmap-entity {
    background: var(--surface-container);
  }
  :root[data-theme="light"] .drift-status-healthy {
    background: var(--secondary-container);
    color: var(--on-surface);
  }
  :root[data-theme="light"] .drift-status-warning {
    background: color-mix(in srgb, var(--gmap-type-coverage) 22%, var(--surface-container-lowest));
    color: var(--on-surface);
  }
  :root[data-theme="light"] .drift-status-breached {
    background: var(--error-container);
    color: var(--on-surface);
  }
  :root[data-theme="light"] .drift-status-unknown-detector-error {
    background: color-mix(in srgb, var(--error) 14%, var(--surface-container-lowest));
  }
  :root[data-theme="light"] .drift-synthetic-badge {
    background: var(--surface-container);
    color: var(--on-surface-variant);
  }

  /* ──────────────────────────────────────────────────────────────────
     Drift-2c — Level 2 Drift Workbench
     Inline below the heatmap. Hidden until a heatmap cell is
     activated. Header, series rail, magnitude chart, and detail /
     observations / annotations stack.
     The chart deliberately renders magnitude only (no thresholds),
     so the y-axis label reads "Magnitude" verbatim. Backfill is a
     separate visual cue (.is-backfilled modifier + dashed outer
     ring) — never folded into a status colour.
     ─────────────────────────────────────────────────────────────── */

  /* Selected heatmap cell (persistent, distinct from hover/focus) */
  .drift-heatmap-cell.is-selected {
    outline: 2px solid var(--primary);
    outline-offset: -2px;
    box-shadow: inset 4px 0 0 0 var(--primary);
  }

  .drift-workbench {
    margin-top: 16px;
    padding: 16px;
    background: var(--surface-container);
    border: var(--border-hairline);
    border-radius: var(--radius-panel);
  }
  .drift-workbench[hidden] { display: none; }

  .drift-workbench-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px 16px;
    margin-bottom: 12px;
  }
  .drift-workbench-header-titles { min-width: 0; flex: 1 1 320px; }
  .drift-workbench-close-btn {
    background: transparent;
    border: 0;
    color: var(--on-surface-variant);
    font-size: 12px;
    font-family: inherit;
    padding: 4px 0;
    cursor: pointer;
    margin-bottom: 4px;
  }
  .drift-workbench-close-btn:hover { color: var(--on-surface); }
  .drift-workbench-title {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--on-surface);
    letter-spacing: -0.01em;
  }
  .drift-workbench-subtitle {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--slate-500);
    margin-top: 2px;
  }
  .drift-workbench-header-status {
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 4px 10px;
    border-radius: var(--radius-tight);
    border: var(--border-hairline);
    align-self: center;
  }

  .drift-workbench-state {
    margin-bottom: 12px;
    padding: 12px 14px;
    background: var(--surface-container-low);
    border: var(--border-hairline);
    border-radius: var(--radius-panel);
    font-size: 12px;
    color: var(--on-surface-variant);
  }
  .drift-workbench-state[hidden] { display: none; }
  .drift-workbench-state strong {
    color: var(--on-surface);
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
  }

  .drift-workbench-layout {
    display: grid;
    grid-template-columns: minmax(220px, 260px) minmax(0, 1fr) minmax(240px, 320px);
    gap: 12px;
    align-items: start;
  }
  @media (max-width: 1100px) {
    .drift-workbench-layout {
      grid-template-columns: 1fr;
    }
  }

  /* ── Series rail ────────────────────────────────────────────────── */
  .drift-workbench-series-rail {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--surface-container-low);
    border: var(--border-hairline);
    border-radius: var(--radius-panel);
    padding: 8px;
  }
  .drift-workbench-series-rail-title {
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--slate-400);
    padding: 4px 6px;
  }
  .drift-workbench-series-row {
    display: flex;
    flex-direction: column;
    gap: 2px;
    align-items: flex-start;
    padding: 8px 10px;
    background: var(--surface-container);
    border: var(--border-hairline);
    border-radius: var(--radius-tight);
    color: var(--on-surface);
    font-family: inherit;
    text-align: left;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
  }
  .drift-workbench-series-row:hover { background: var(--surface-container-high); }
  .drift-workbench-series-row.is-active {
    border-color: var(--primary);
    box-shadow: inset 4px 0 0 0 var(--primary);
  }
  .drift-workbench-series-row-metric {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 600;
  }
  .drift-workbench-series-row-meta {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--slate-400);
  }

  /* ── Chart panel ────────────────────────────────────────────────── */
  .drift-workbench-chart-panel {
    background: var(--surface-container-low);
    border: var(--border-hairline);
    border-radius: var(--radius-panel);
    padding: 12px;
    min-height: 240px;
  }
  .drift-workbench-chart {
    width: 100%;
    height: 220px;
    display: block;
  }
  .drift-workbench-axis {
    stroke: var(--outline-variant);
    stroke-width: 1;
    fill: none;
  }
  .drift-workbench-axis-label {
    font-family: var(--font-mono);
    font-size: 10px;
    fill: var(--slate-400);
  }
  .drift-workbench-axis-title {
    font-family: var(--font-mono);
    font-size: 10px;
    fill: var(--on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.08em;
  }
  .drift-workbench-line {
    stroke: var(--on-surface-variant);
    stroke-width: 1.5;
    fill: none;
  }
  .drift-workbench-baseline {
    stroke: var(--outline);
    stroke-width: 1;
    stroke-dasharray: 2 3;
    fill: none;
  }
  .drift-workbench-point {
    stroke: var(--surface-container-low);
    stroke-width: 1;
  }
  .drift-workbench-point.status-healthy                   { fill: var(--secondary); }
  .drift-workbench-point.status-warning                   { fill: var(--gmap-type-coverage); }
  .drift-workbench-point.status-breached                  { fill: var(--error); }
  .drift-workbench-point.status-unknown-insufficient-data { fill: transparent; stroke: var(--outline); stroke-dasharray: 2 2; }
  .drift-workbench-point.status-unknown-detector-error    { fill: transparent; stroke: var(--error); stroke-dasharray: 2 2; }
  .drift-workbench-point.is-latest                        { stroke: var(--primary); stroke-width: 2; }
  /* Backfill is rendered as a separate, dashed outer ring — orthogonal
     to status. Forbidden combined classes such as
     status-warning-backfilled or drift-status-backfilled are not
     introduced (pinned by tests). */
  .drift-workbench-backfill-marker {
    fill: none;
    stroke: var(--gmap-type-coverage);
    stroke-width: 1.5;
    stroke-dasharray: 3 3;
  }

  .drift-workbench-chart-legend {
    margin-top: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--slate-400);
  }
  .drift-workbench-chart-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .drift-workbench-legend-swatch {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-pip);
    background: var(--outline-variant);
    display: inline-block;
  }
  .drift-workbench-legend-swatch.status-healthy                   { background: var(--secondary); }
  .drift-workbench-legend-swatch.status-warning                   { background: var(--gmap-type-coverage); }
  .drift-workbench-legend-swatch.status-breached                  { background: var(--error); }
  .drift-workbench-legend-swatch.status-unknown-insufficient-data { background: transparent; border: 1px dashed var(--outline); }
  .drift-workbench-legend-swatch.status-unknown-detector-error    { background: transparent; border: 1px dashed var(--error); }
  .drift-workbench-legend-swatch.is-backfilled                    { background: transparent; border: 1px dashed var(--gmap-type-coverage); }

  /* ── Side: detail / observations / annotations stack ────────────── */
  .drift-workbench-side {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .drift-workbench-detail,
  .drift-workbench-observations,
  .drift-workbench-annotations {
    background: var(--surface-container-low);
    border: var(--border-hairline);
    border-radius: var(--radius-panel);
    padding: 12px;
  }
  .drift-workbench-detail-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
  }
  .drift-workbench-detail-title {
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--slate-400);
    flex: 1 1 auto;
  }
  .drift-workbench-detail-status {
    font-family: var(--font-mono);
    font-size: 10px;
    padding: 2px 6px;
    border-radius: var(--radius-tight);
  }
  .drift-workbench-detail-fields {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--on-surface-variant);
  }
  .drift-workbench-detail-fields .key {
    color: var(--slate-500);
    margin-right: 6px;
  }

  .drift-workbench-section-title {
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--slate-400);
    margin-bottom: 6px;
  }
  .drift-workbench-observation-list,
  .drift-workbench-annotation-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  .drift-workbench-observation-item,
  .drift-workbench-annotation-item {
    padding: 6px 8px;
    background: var(--surface-container);
    border: var(--border-hairline);
    border-radius: var(--radius-tight);
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--on-surface-variant);
  }
  .drift-workbench-observation-meta,
  .drift-workbench-annotation-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 8px;
    margin-bottom: 2px;
  }
  .drift-workbench-observation-id { color: var(--on-surface); font-weight: 600; }
  .drift-workbench-annotation-type { color: var(--on-surface); font-weight: 600; }
  .drift-workbench-observation-time,
  .drift-workbench-annotation-time { color: var(--slate-500); }
  .drift-workbench-annotation-body {
    color: var(--on-surface);
    white-space: pre-wrap;
    margin-top: 2px;
  }

  .drift-workbench-empty {
    font-size: 11px;
    color: var(--slate-500);
    padding: 8px 4px;
    text-align: center;
  }

  /* In-line backfill marker used inside list rows / detail headers
     where an SVG ring would not apply. Kept distinct from any status
     class so backfill stays orthogonal. */
  .drift-workbench-backfill-marker:not(circle) {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 2px 6px;
    border-radius: var(--radius-pip);
    border: 1px dashed var(--gmap-type-coverage);
    color: var(--gmap-type-coverage);
  }

  /* ── Light-mode overrides ───────────────────────────────────────── */
  :root[data-theme="light"] .drift-workbench {
    background: var(--surface-container-lowest);
  }
  :root[data-theme="light"] .drift-workbench-chart-panel,
  :root[data-theme="light"] .drift-workbench-detail,
  :root[data-theme="light"] .drift-workbench-observations,
  :root[data-theme="light"] .drift-workbench-annotations,
  :root[data-theme="light"] .drift-workbench-series-rail {
    background: var(--surface-container);
  }
  :root[data-theme="light"] .drift-workbench-line {
    stroke: var(--on-surface);
  }
  :root[data-theme="light"] .drift-workbench-point.status-healthy   { fill: var(--secondary); }
  :root[data-theme="light"] .drift-workbench-point.status-warning   { fill: var(--gmap-type-coverage); }
  :root[data-theme="light"] .drift-workbench-point.status-breached  { fill: var(--error); }

  /* ──────────────────────────────────────────────────────────────────
     Drift-2d — Level 3 Observation Inspector
     Pre-rendered hidden section that lives inside
     [data-drift-workbench-observations], beneath the observation list.
     The inspector is strictly read-only: the only control is a Close
     button (no triage, no annotation creation/editing). Backfilled is
     a separate badge element with its own class — never folded into a
     status modifier.
     ─────────────────────────────────────────────────────────────── */

  /* Observation row — selected state. Drift-2c rendered observation
     items as <li>; Drift-2d converts them to <button> rows so they are
     clickable and keyboard-activatable. The .is-selected modifier is
     persistent (survives hover/focus changes). */
  .drift-workbench-observation-row {
    display: block;
    width: 100%;
    background: transparent;
    border: var(--border-hairline);
    border-radius: var(--radius-tight);
    padding: 6px 8px;
    color: inherit;
    font-family: inherit;
    text-align: left;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
  }
  .drift-workbench-observation-row:hover,
  .drift-workbench-observation-row:focus {
    background: var(--surface-container-high);
    outline: none;
    border-color: var(--outline);
  }
  .drift-workbench-observation-row.is-selected {
    border-color: var(--primary);
    box-shadow: inset 4px 0 0 0 var(--primary);
  }

  .drift-observation-inspector {
    margin-top: 8px;
    padding: 12px;
    background: var(--surface-container);
    border: var(--border-hairline);
    border-radius: var(--radius-panel);
  }
  .drift-observation-inspector[hidden] { display: none; }

  .drift-observation-inspector-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px 12px;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--outline-variant);
  }
  .drift-observation-inspector-titles { min-width: 0; flex: 1 1 auto; }
  .drift-observation-inspector-title {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 700;
    color: var(--on-surface);
  }
  .drift-observation-inspector-subtitle {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--slate-500);
    margin-top: 2px;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 8px;
    align-items: center;
  }
  .drift-observation-inspector-status-row {
    margin-top: 4px;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 8px;
    font-family: var(--font-mono);
    font-size: 10px;
  }
  .drift-observation-detector-status,
  .drift-observation-operator-status {
    padding: 2px 6px;
    border-radius: var(--radius-tight);
    border: var(--border-hairline);
  }
  .drift-observation-inspector-close {
    background: transparent;
    border: var(--border-hairline);
    color: var(--on-surface-variant);
    font-family: inherit;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: var(--radius-tight);
    cursor: pointer;
    align-self: flex-start;
  }
  .drift-observation-inspector-close:hover {
    color: var(--on-surface);
    background: var(--surface-container-high);
  }

  .drift-observation-inspector-body {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .drift-observation-section {
    background: var(--surface-container-low);
    border: var(--border-hairline);
    border-radius: var(--radius-tight);
    padding: 8px 10px;
  }
  .drift-observation-section-title {
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--slate-400);
    margin-bottom: 6px;
    font-weight: 700;
  }

  .drift-observation-kv {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 4px 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--on-surface-variant);
    padding: 2px 0;
  }
  .drift-observation-kv-key { color: var(--slate-500); }
  .drift-observation-kv-value {
    color: var(--on-surface);
    word-break: break-all;
  }

  .drift-observation-code-chip {
    font-family: var(--font-mono);
    font-size: 10px;
    background: var(--surface-container-high);
    color: var(--on-surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-tight);
    padding: 1px 6px;
    user-select: text;
    word-break: break-all;
  }

  .drift-observation-evidence-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
  }

  .drift-observation-governance-refs .drift-observation-kv {
    grid-template-columns: 220px 1fr;
  }

  .drift-observation-annotation-card {
    background: var(--surface-container);
    border: var(--border-hairline);
    border-radius: var(--radius-tight);
    padding: 8px 10px;
    margin-top: 6px;
  }
  .drift-observation-annotation-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 10px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--slate-500);
    margin-bottom: 4px;
  }
  .drift-observation-annotation-type { color: var(--on-surface); font-weight: 600; }
  .drift-observation-annotation-status,
  .drift-observation-annotation-author { color: var(--on-surface-variant); }
  .drift-observation-annotation-body {
    font-size: 12px;
    color: var(--on-surface);
    white-space: pre-wrap;
  }

  /* Backfill badge — separate DOM element with its own class. Never
     a modifier on a status element; combined classes such as
     status-warning-backfilled are forbidden (pinned by tests). */
  .drift-observation-backfill-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 2px 8px;
    border-radius: var(--radius-pip);
    border: 1px dashed var(--gmap-type-coverage);
    color: var(--gmap-type-coverage);
    margin-bottom: 6px;
  }

  .drift-observation-empty {
    font-size: 11px;
    color: var(--slate-500);
    padding: 4px 0;
  }

  /* ── Light-mode overrides ───────────────────────────────────────── */
  :root[data-theme="light"] .drift-observation-inspector {
    background: var(--surface-container-lowest);
  }
  :root[data-theme="light"] .drift-observation-section {
    background: var(--surface-container);
  }
  :root[data-theme="light"] .drift-observation-annotation-card {
    background: var(--surface-container-low);
  }
  :root[data-theme="light"] .drift-observation-code-chip {
    background: var(--surface-container);
  }