.hui-editor-rail {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  min-width: 0;
}

.hui-editor-rail-tabs {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  padding: 0;
  border-bottom: 1px solid var(--hui-border-soft);
  background: var(--hui-panel);
}

.hui-editor-rail-tabs > * { width: 100%; }
.hui-editor-rail-tabs [role="group"] { width: 100%; }
.hui-editor-rail-tabs .arcane-toggle-group {
  gap: 0 !important;
  border-radius: 0 !important;
}
.hui-editor-rail-tabs button {
  flex: 1 1 0;
  min-width: 0;
  height: 32px !important;
  min-height: 32px;
  padding: 0 8px !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}
.hui-editor-rail-tabs button:hover,
.hui-editor-rail-tabs button:focus-visible {
  background: var(--hui-panel-soft) !important;
}
.hui-editor-rail-tabs button[aria-pressed="true"] {
  background: var(--hui-panel-soft) !important;
  box-shadow: inset 0 -2px 0 var(--hui-accent) !important;
}
.hui-editor-rail-tabs button span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.hui-library-inner {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 8px 10px 24px;
}

.hui-library-header,
.hui-library-heading,
.hui-library-actions {
  display: flex;
  align-items: center;
}

.hui-library-header {
  align-items: stretch;
  flex-direction: column;
  gap: 4px;
}
.hui-library-heading { gap: 6px; min-width: 0; }
/* Count first, then the scope and workspace controls hard against the right
   edge, so the heading reads as a label rather than a row of buttons. */
.hui-library-heading .hui-rail-count { margin-right: auto; }

.hui-library .arcane-button {
  border-radius: 0 !important;
}

.hui-library .arcane-button[data-variant="ghost"] {
  border: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

.hui-library .arcane-button[data-variant="ghost"]:hover:not(:disabled),
.hui-library .arcane-button[data-variant="ghost"]:focus-visible {
  background: var(--hui-panel-soft) !important;
}

/* Creation only. Import, export and erase are workspace-level operations and
   live in the header menu — as icon buttons in this row they read as three
   more document kinds, which is how they were being misread. */
.hui-library-create {
  display: flex;
  gap: 0;
  width: 100%;
  border-top: 1px solid var(--hui-border-soft);
  border-bottom: 1px solid var(--hui-border-soft);
}
.hui-library-create .arcane-button {
  width: auto;
  min-width: 0;
  min-height: 30px;
  padding-inline: 8px !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  color: var(--hui-text) !important;
}
.hui-library-create .arcane-button:hover:not(:disabled),
.hui-library-create .arcane-button:focus-visible {
  background: var(--hui-panel-soft) !important;
}
.hui-library-create .arcane-button:first-child {
  flex: 0 0 auto;
  border-right: 1px solid var(--hui-border-soft) !important;
}
.hui-library-create .arcane-button:last-child {
  flex: 1 1 auto;
  justify-content: flex-start;
}

.hui-library-hint {
  overflow: hidden;
  margin: 0;
  color: var(--hui-muted);
  font-size: .7rem;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hui-library-tree,
.hui-library-folder,
.hui-library-document,
.hui-library-children {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.hui-library-tree { gap: 2px; }
.hui-library-children { gap: 2px; }

.hui-library-row {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  min-height: 34px;
  box-sizing: border-box;
  padding: 4px 6px 4px calc(6px + var(--hui-tree-depth, 0) * 14px);
  border: 1px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--hui-text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--hui-transition), border-color var(--hui-transition);
}

.hui-library-row:hover {
  background: color-mix(in srgb, var(--hui-accent) 7%, transparent);
}

.hui-library-row.is-selected {
  border-color: transparent;
  background: color-mix(in srgb, var(--hui-panel-soft) 92%, var(--hui-text) 8%);
}

.hui-library-row.is-active .hui-library-label { color: var(--hui-text); }

.hui-library-row-primary {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  gap: 6px;
  min-width: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.hui-library-row-menu {
  display: grid;
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--hui-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--hui-transition), background var(--hui-transition);
}

.hui-library-row:is(:hover, :focus-within, .is-selected) .hui-library-row-menu,
.hui-library-row-menu[aria-expanded="true"] { opacity: 1; }
.hui-library-row-menu:hover { background: color-mix(in srgb, var(--hui-accent) 12%, transparent); color: var(--hui-text); }

.hui-library-disclosure {
  display: grid;
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--hui-muted);
  cursor: pointer;
}

.hui-library-disclosure:hover:not(:disabled) {
  background: color-mix(in srgb, var(--hui-accent) 10%, transparent);
  color: var(--hui-text);
}

.hui-library-disclosure:disabled { cursor: default; opacity: .2; }
.hui-library-document-spacer { width: 22px; flex: 0 0 22px; }

.hui-library-label {
  overflow: hidden;
  flex: 1 1 auto;
  min-width: 0;
  color: var(--hui-text);
  font-size: .78rem;
  font-weight: 570;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hui-library-count {
  color: var(--hui-muted);
  font-size: .68rem;
  font-variant-numeric: tabular-nums;
}

.hui-library-document-copy {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  min-width: 0;
}

.hui-library-document-copy code {
  overflow: hidden;
  color: var(--hui-muted);
  font-family: var(--font-mono);
  font-size: .64rem;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hui-library-warning { display: inline-flex; color: var(--hui-warning); }

.hui-library-actions,
.hui-library-editor {
  margin: 2px 4px 6px 28px;
  border-left: 1px solid var(--hui-border-soft);
}

.hui-library-actions { flex-wrap: wrap; gap: 2px; padding-left: 6px; }
.hui-library-actions .arcane-button { flex: 1 1 0; }

.hui-library-editor {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 7px 0 7px 9px;
  color: var(--hui-muted);
  font-size: .7rem;
}

.hui-library-editor label,
.hui-library-editor label > span {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hui-library-editor.is-delete { color: var(--hui-danger); }
.hui-library-editor.is-system { padding-block: 8px; }
.hui-library-empty {
  padding: 24px 12px;
  color: var(--hui-muted);
  font-size: .78rem;
  line-height: 1.5;
  text-align: center;
}

/* Scoped and empty is a statement about one kind, not about the workspace, so
   the way out of it is that kind's create button rather than a sentence. */
.hui-library-empty.is-scoped {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.hui-library-bundle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 9px;
  border: 1px solid color-mix(in srgb, var(--hui-warning) 48%, var(--hui-border));
  border-radius: var(--hui-radius);
  background: color-mix(in srgb, var(--hui-warning) 8%, var(--hui-panel));
  color: var(--hui-muted);
  font-size: .7rem;
  line-height: 1.4;
}

.hui-library-bundle strong { color: var(--hui-text); }
.hui-library-bundle.is-error,
.hui-library-bundle-warning { color: var(--hui-danger); }
.hui-library-bundle.is-danger {
  border-color: color-mix(in srgb, var(--hui-danger) 52%, var(--hui-border));
  background: color-mix(in srgb, var(--hui-danger) 8%, var(--hui-panel));
}
.hui-library-bundle.is-danger strong { color: var(--hui-danger); }
.hui-library-bundle-actions { display: flex; flex-wrap: wrap; gap: 4px; }

.hui-action-menu-layer {
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
}

.hui-action-menu-scrim {
  position: absolute;
  inset: 0;
  pointer-events: auto;
}

.hui-action-menu {
  position: fixed;
  top: clamp(8px, var(--hui-menu-y), calc(100vh - var(--hui-menu-height) - 8px));
  left: clamp(8px, var(--hui-menu-x), calc(100vw - 232px));
  display: flex;
  width: 224px;
  max-height: calc(100vh - 16px);
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
  box-sizing: border-box;
  padding: 6px;
  border: 1px solid var(--hui-border);
  border-radius: var(--hui-radius);
  background: var(--hui-surface-raised);
  box-shadow: var(--hui-shadow-lg);
  pointer-events: auto;
}

/* Icon in the first column, label over hint in the second. As one flex row the
   hint never shrank (`flex: 0 0 auto`) and took its whole max-content width out
   of the label's share, which folded "Import workspace bundle" onto three lines
   beside a single-line "Replaces this workspace". Every hint in the app is a
   sentence fragment, not a shortcut glyph, so the second line is where it
   belongs. The icon spans both rows; with no hint the second row collapses. */
.hui-action-menu-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  min-height: 38px;
  align-items: center;
  column-gap: 9px;
  width: 100%;
  padding: 7px 9px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--hui-text);
  font: inherit;
  font-size: .78rem;
  text-align: left;
  cursor: pointer;
}

.hui-action-menu-item:hover:not(:disabled),
.hui-action-menu-item:focus-visible {
  background: color-mix(in srgb, var(--hui-accent) 11%, transparent);
}
.hui-action-menu-item:disabled { opacity: .42; cursor: default; }
.hui-action-menu-item.is-destructive { color: var(--hui-danger); }
.hui-action-menu-icon {
  display: inline-flex;
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: center;
}
.hui-action-menu-label { grid-column: 2; min-width: 0; }
.hui-action-menu-hint {
  grid-column: 2;
  min-width: 0;
  color: var(--hui-muted);
  font-size: .65rem;
  line-height: 1.35;
}
.hui-action-menu-separator { height: 1px; margin: 4px 3px; background: var(--hui-border-soft); }

@media (pointer: coarse), (max-width: 720px) {
  .hui-action-menu {
    top: auto;
    right: 8px;
    bottom: max(8px, env(safe-area-inset-bottom));
    left: 8px;
    width: auto;
    max-height: min(72vh, 520px);
    border-radius: 0;
  }
  .hui-action-menu-item { min-height: 46px; padding: 10px 12px; }
  .hui-library-create .arcane-button { min-height: 42px; }
  .hui-library-heading .arcane-button { min-width: 40px; min-height: 40px; }
  .hui-editor-rail-tabs button { min-height: 40px; }
  .hui-library-disclosure { width: 40px; height: 40px; flex-basis: 40px; }
  .hui-library-row-menu { width: 40px; height: 40px; flex-basis: 40px; opacity: 1; }
}

.hui-handoff-details {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 7px 14px;
  margin: 0;
}
.hui-handoff-details dt { color: var(--hui-muted); }
.hui-handoff-details dd { min-width: 0; margin: 0; }
.hui-handoff-details code { overflow-wrap: anywhere; }

/* ---- centre-cell visibility --------------------------------------------- */
/* The four modes are the same for every kind, so the centre pane no longer has
   a class per surface: `.hui-center` carries `is-visual`/`is-preview`/
   `is-code`/`is-split` and `data-surface` names the open kind's surface. The
   shell mounts exactly one surface cell — except the canvas and the card,
   which stay mounted in every mode because their viewport state cannot
   survive a remount, and are therefore hidden here instead.

   This block lives in 09 rather than 02 on purpose: 07-preview.css and
   08-preview-card.css both hide cells at class specificity, and later files
   win at equal weight. 02-shell.css still owns the `is-code` arm, and
   07-preview.css still owns the `is-preview` arm — every cell the preview
   mode mounts carries `.is-preview`, so both keep working unchanged. */
.hui-center > .hui-split-cell.is-canvas,
.hui-center > .hui-split-cell.is-preview-card { display: none; }

.hui-center[data-surface="canvas"]:not(.is-code):not(.is-preview)
  > .hui-split-cell.is-canvas,
.hui-center[data-surface="previewCard"]:not(.is-code):not(.is-preview)
  > .hui-split-cell.is-preview-card { display: block; }

/* Every conditionally mounted surface cell fills its column. */
.hui-center > .hui-split-cell.is-board,
.hui-center > .hui-split-cell.is-hologram,
.hui-center > .hui-split-cell.is-animation,
.hui-center > .hui-split-cell.is-scoreboard,
.hui-center > .hui-split-cell.is-hud,
.hui-center > .hui-split-cell.is-connections,
.hui-center > .hui-split-cell.is-motd,
.hui-center > .hui-split-cell.is-emoji,
.hui-center > .hui-split-cell.is-bubble,
.hui-center > .hui-split-cell.is-tablist,
.hui-center > .hui-split-cell.is-damage-indicators,
.hui-center > .hui-split-cell.is-entity-overlays,
.hui-center > .hui-split-cell.is-real-drops,
.hui-center > .hui-split-cell.is-inventory,
.hui-center > .hui-split-cell.is-nameplate,
.hui-center > .hui-split-cell.is-nametag,
.hui-center > .hui-split-cell.is-marker { display: block; border-left: 0; }

.hui-board {
  display: flex;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  background: var(--hui-bg);
}

.hui-board-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 7px 10px;
  border-bottom: 1px solid var(--hui-border-soft);
  background: var(--hui-panel);
}

.hui-board-heading,
.hui-board-controls,
.hui-board-scope {
  display: flex;
  align-items: center;
}

.hui-board-heading { gap: 10px; min-width: 0; }
.hui-board-heading > svg { color: var(--hui-accent); }
.hui-board-heading h1 { margin: 0; font-size: .95rem; line-height: 1.2; }
.hui-board-heading p { margin: 2px 0 0; color: var(--hui-muted); font-size: .7rem; }
.hui-board-controls { justify-content: flex-end; gap: 2px; }
.hui-board-scope { gap: 6px; color: var(--hui-muted); font-size: .7rem; }
.hui-board-scope > div { min-width: 180px; }

.hui-board-notice {
  padding: 8px 16px;
  border-bottom: 1px solid var(--hui-border-soft);
  color: var(--hui-muted);
  font-size: .75rem;
}
.hui-board-notice.is-warning {
  background: color-mix(in srgb, var(--hui-warning) 10%, transparent);
  color: var(--hui-warning);
}

.hui-board-summary {
  display: flex;
  gap: 1px;
  overflow-x: auto;
  padding: 0 16px;
  border-bottom: 1px solid var(--hui-border-soft);
  background: var(--hui-panel-soft);
}

.hui-board-metric {
  display: flex;
  flex: 0 0 auto;
  align-items: baseline;
  gap: 5px;
  padding: 8px 10px;
  border-right: 1px solid var(--hui-border-soft);
}
.hui-board-metric strong { font-size: .78rem; font-variant-numeric: tabular-nums; }
.hui-board-metric span { color: var(--hui-muted); font-size: .67rem; }
.hui-board-metric.is-danger strong,
.hui-board-metric.is-danger span { color: var(--hui-danger); }

.hui-board-body { min-width: 0; min-height: 0; flex: 1 1 auto; overflow: hidden; }
.hui-board-scroll { width: 100%; height: 100%; overflow: auto; }
.hui-board-stage {
  position: relative;
  min-width: 100%;
  min-height: 100%;
  background-color: var(--hui-bg);
  background-image: radial-gradient(
    circle,
    color-mix(in srgb, var(--hui-border) 68%, transparent) 1px,
    transparent 1px
  );
  background-size: 22px 22px;
}

.hui-board-node,
.hui-board-sink {
  position: absolute;
  z-index: 2;
  box-sizing: border-box;
  border: 1px solid var(--hui-border);
  border-radius: var(--hui-radius);
  background: color-mix(in srgb, var(--hui-panel) 94%, transparent);
  box-shadow: var(--hui-shadow-sm);
}

.hui-board-node {
  display: flex;
  width: 228px;
  min-height: 118px;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
}

.hui-board-node.has-cycle { border-color: color-mix(in srgb, var(--hui-warning) 74%, var(--hui-border)); }
.hui-board-node.is-orphan { border-color: color-mix(in srgb, var(--hui-info) 58%, var(--hui-border)); }
.hui-board-node.has-danger { border-color: color-mix(in srgb, var(--hui-danger) 72%, var(--hui-border)); }

.hui-board-node-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  min-width: 0;
}
.hui-board-node-header > div:first-child { display: flex; min-width: 0; flex-direction: column; }
.hui-board-node-header strong {
  overflow: hidden;
  font-size: .8rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hui-board-node-header code { color: var(--hui-muted); font-size: .64rem; }

.hui-board-badges { display: flex; flex: 0 0 auto; flex-wrap: wrap; justify-content: flex-end; gap: 3px; }
.hui-board-badge {
  padding: 2px 5px;
  border-radius: 0;
  background: var(--hui-panel-soft);
  color: var(--hui-muted);
  font-size: .58rem;
  font-weight: 650;
  line-height: 1.3;
}

.hui-board-controls .arcane-button {
  height: 30px !important;
  min-height: 30px;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

.hui-board-controls .arcane-button:hover:not(:disabled),
.hui-board-controls .arcane-button:focus-visible {
  background: var(--hui-panel-soft) !important;
}

.hui-board-controls .arcane-toggle-group {
  gap: 0 !important;
  border-radius: 0 !important;
}

.hui-board-controls .arcane-toggle-group-item {
  height: 30px !important;
  min-height: 30px;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

.hui-board-controls .arcane-toggle-group-item:hover,
.hui-board-controls .arcane-toggle-group-item:focus-visible,
.hui-board-controls .arcane-toggle-group-item[aria-pressed="true"] {
  background: var(--hui-panel-soft) !important;
}

.hui-board-controls .arcane-toggle-group-item[aria-pressed="true"] {
  box-shadow: inset 0 -2px 0 var(--hui-accent) !important;
}
.hui-board-badge.is-cycle { color: var(--hui-warning); }
.hui-board-badge.is-orphan { color: var(--hui-info); }
.hui-board-badge.is-danger { color: var(--hui-danger); }

.hui-board-routes { display: flex; flex: 1 1 auto; flex-direction: column; gap: 3px; min-width: 0; }
.hui-board-route { display: flex; align-items: baseline; gap: 6px; min-width: 0; font-size: .64rem; }
.hui-board-route code { flex: 0 1 auto; overflow: hidden; color: var(--hui-muted); text-overflow: ellipsis; }
.hui-board-route span { overflow: hidden; flex: 1 1 auto; text-overflow: ellipsis; white-space: nowrap; }
.hui-board-route.is-external { color: var(--hui-info); }
.hui-board-route.is-dangling,
.hui-board-route.is-ambiguous,
.hui-board-route.is-invalid { color: var(--hui-danger); }
.hui-board-route.is-back,
.hui-board-route.is-home,
.hui-board-route.is-close { color: var(--hui-success); }
.hui-board-no-routes,
.hui-board-more-routes { margin: 0; color: var(--hui-muted); font-size: .64rem; }

.hui-board-edge {
  position: absolute;
  z-index: 1;
  height: 2px;
  transform-origin: left center;
  background: color-mix(in srgb, var(--hui-accent) 62%, var(--hui-border));
  pointer-events: none;
}
.hui-board-edge::after {
  content: "";
  position: absolute;
  top: -3px;
  right: -1px;
  width: 7px;
  height: 7px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  color: inherit;
  transform: rotate(45deg);
}
.hui-board-edge.is-back,
.hui-board-edge.is-home,
.hui-board-edge.is-close { background: var(--hui-success); color: var(--hui-success); }

.hui-board-sink {
  display: flex;
  width: 122px;
  height: 64px;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-style: dashed;
  color: var(--hui-success);
  font-size: .75rem;
  font-weight: 650;
}

.hui-board-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 10px;
  height: 100%;
  box-sizing: border-box;
  overflow: auto;
  align-content: start;
  padding: 16px;
}
.hui-board-list-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--hui-border);
  border-radius: var(--hui-radius);
  background: var(--hui-panel);
  box-shadow: var(--hui-shadow-xs);
}

.hui-board-empty {
  display: grid;
  width: 100%;
  height: 100%;
  place-items: center;
  box-sizing: border-box;
  padding: 32px;
  color: var(--hui-muted);
  font-size: .82rem;
  text-align: center;
}

.hui-board-inspector { display: flex; flex-direction: column; gap: 10px; }
.hui-board-inspector-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-block: 5px;
  border-bottom: 1px solid var(--hui-border-soft);
  color: var(--hui-muted);
  font-size: .74rem;
}
.hui-board-inspector-row strong { color: var(--hui-text); font-variant-numeric: tabular-nums; }
.hui-board-inspector-row.is-danger,
.hui-board-inspector-row.is-danger strong { color: var(--hui-danger); }

@media (max-width: 980px) {
  .hui-board-toolbar { align-items: flex-start; flex-direction: column; }
  .hui-board-controls { width: 100%; justify-content: flex-start; flex-wrap: wrap; }
}

@media (pointer: coarse), (max-width: 700px) {
  .hui-board-controls .arcane-button,
  .hui-board-controls .arcane-toggle-group-item {
    min-width: 40px;
    min-height: 40px;
  }
}
.hui-board-runtime-json {
  width: 100%;
  min-height: 240px;
  resize: vertical;
  border: 1px solid var(--hui-border-soft);
  border-radius: var(--hui-radius-sm);
  padding: 10px;
  background: var(--hui-surface-raised);
  color: var(--hui-text);
  font-family: var(--hui-font-mono);
  font-size: 11px;
  line-height: 1.55;
  tab-size: 2;
}