.left-pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: transparent;
  padding: 8px 7px;
  overflow: hidden;
  /* Removed transitions to improve FPS during collapse toggles */
}

.pane-shell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  flex: 1 1 auto;
  min-height: 0;
  border: var(--glass-pane-border);
  border-radius: 7px;
  background: var(--glass-pane-bg);
  box-shadow: var(--glass-pane-highlight);
  backdrop-filter: var(--glass-pane-blur);
  -webkit-backdrop-filter: var(--glass-pane-blur);
  padding: 8px;
  overflow: hidden;
  /* Removed transitions to improve FPS during collapse toggles */
}

#artifactPanel,
#adminPanel,
#modelingPanel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
}

#artifactPanel {
  gap: 0;
  height: 100%;
  padding: 0;
}

#artifactPanel:not(.hidden),
#adminPanel:not(.hidden),
#modelingPanel:not(.hidden) {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

#artifactPanel:not(.hidden) .sidebar-section:first-child {
  flex: 0 0 auto;
}

#artifactPanel:not(.hidden) .sidebar-section-grow {
  flex: 1 1 0%;
  min-height: 0;
}

#adminPanel:not(.hidden) {
  overflow-y: auto;
  padding-right: 2px;
}

#modelingPanel:not(.hidden) .sidebar-section,
#modelingPanel:not(.hidden) #palettePane .sidebar-section,
#modelingPanel:not(.hidden) #methodologyPane .sidebar-section {
  flex: 1 1 0%;
  min-height: 0;
  overflow: hidden;
}

#modelingPanel:not(.hidden) > .sidebar-section:last-child,
#modelingPanel:not(.hidden) #palettePane > .sidebar-section:last-child,
#modelingPanel:not(.hidden) #methodologyPane > .sidebar-section:last-child {
  flex: 1 1 0%;
  overflow: hidden;
}

#modelingPanel:not(.hidden) .palette {
  flex: 1;
  min-height: 0;
  align-content: start;
  overflow-y: auto;
  overflow-x: hidden;
  padding-inline: 0;
  overscroll-behavior: contain;
  scrollbar-gutter: auto;
  scrollbar-width: thin;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 1px 0 10px;
  border-bottom: 1px solid color-mix(in srgb, var(--border-subtle) 80%, transparent);
}

.sidebar-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-section-grow {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.sidebar-section-grow .file-tree {
  flex: 1 1 auto;
  height: 0;
  min-height: 0;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 24px;
}

.sidebar-section-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  min-width: 0;
  flex-shrink: 0;
}

#modelingPanel .sidebar-section-hint {
  display: none;
}

.sidebar-section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  padding: 3px;
  border-radius: 5px;
  background: color-mix(in srgb, var(--surface-3) 80%, transparent);
  object-fit: contain;
}

.sidebar-section-title {
  flex: 1;
  min-width: 0;
  font: 700 10px/1.2 var(--font-display);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.sidebar-section-hint {
  font: 500 10px/1.2 var(--font-ui);
  color: var(--muted-2);
}

.sidebar-select {
  width: 100%;
  min-height: 34px;
  padding: 7px 9px;
  border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
  background: color-mix(in srgb, var(--input-bg) 90%, var(--surface-contrast) 10%);
  color: var(--text);
  font: 500 12px/1.3 var(--font-ui);
  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

.sidebar-select:is(select) {
  padding-right: 32px;
  background-color: color-mix(in srgb, var(--input-bg) 90%, var(--surface-contrast) 10%);
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 17px) 50%,
    calc(100% - 12px) 50%;
  background-repeat: no-repeat;
  background-size: 5px 5px;
}

.sidebar-select:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 76%, transparent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent-glow) 62%, transparent);
}

.sidebar-select:is(select):focus {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--accent-light) 50%),
    linear-gradient(135deg, var(--accent-light) 50%, transparent 50%);
}

.sidebar-inline-action {
  padding: 5px 8px;
  border-radius: 7px;
  border: 1px solid color-mix(in srgb, var(--accent) 32%, transparent);
  background: color-mix(in srgb, var(--accent) 14%, var(--surface-3) 86%);
  color: var(--text);
  font: 600 10px/1 var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    color var(--transition),
    border-color var(--transition),
    background var(--transition);
}

.sidebar-inline-action:hover {
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  background: color-mix(in srgb, var(--accent) 20%, var(--surface-high) 80%);
}

.palette {
  display: grid;
  grid-template-columns: 1fr;
  grid-auto-rows: min-content;
  gap: 5px;
  box-sizing: border-box;
}

.palette-search-row {
  margin: 0 0 6px;
  min-width: 0;
  padding-inline: 2px;
}

.palette-search-input {
  min-height: 28px;
  padding-block: 5px;
  font-size: 11px;
}

.palette-empty {
  grid-column: 1 / -1;
  padding: 10px 8px;
  margin-inline: 2px;
  border-radius: 8px;
  border: 1px dashed color-mix(in srgb, var(--border) 78%, transparent);
  color: var(--muted);
  font: 500 11px/1.35 var(--font-ui);
  text-align: center;
}

.palette-context-actions {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
  gap: 6px;
  min-width: 0;
}

.palette-group {
  grid-column: 1 / -1;
  display: grid;
  gap: 5px;
  padding-top: 4px;
  padding-inline: 2px;
  min-width: 0;
}

.palette-group-toolbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 2px 2px;
  min-width: 0;
}

.palette-group-toolbar-label {
  color: var(--muted);
  font: 700 9px/1.2 var(--font-display);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.palette-group-toolbar-actions {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
  min-width: 0;
}

.palette-group-toolbar-btn {
  min-height: 24px;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--border) 76%, transparent);
  background: color-mix(in srgb, var(--surface-3) 92%, var(--surface-high) 8%);
  color: var(--muted);
  font: 600 10px/1 var(--font-ui);
  cursor: pointer;
  max-width: 100%;
}

.palette-group-toolbar-btn:hover {
  border-color: color-mix(in srgb, var(--accent) 54%, transparent);
  color: var(--text);
}

.palette-group-title {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  box-sizing: border-box;
  min-height: 24px;
  padding: 5px 8px;
  border: 1px solid color-mix(in srgb, var(--border-subtle) 78%, transparent);
  border-radius: 7px;
  background: color-mix(in srgb, var(--glass-pane-bg) 88%, transparent);
  color: var(--muted-2);
  cursor: pointer;
  min-width: 0;
}

.palette-group-meta {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.palette-group-chevron {
  width: 9px;
  height: 9px;
  flex-shrink: 0;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transition:
    transform var(--transition),
    color var(--transition);
}

.palette-group-title[aria-expanded="false"] .palette-group-chevron {
  transform: rotate(-45deg) translateY(1px);
}

.palette-group-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted-2);
  font: 700 9px/1.2 var(--font-display);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.palette-group-title:hover {
  border-color: color-mix(in srgb, var(--accent) 38%, transparent);
  background: color-mix(in srgb, var(--surface-high) 78%, transparent);
  color: var(--text);
}

.palette-group-count {
  margin-left: auto;
  padding: 3px 7px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-high) 78%, transparent);
  color: var(--muted);
  font: 700 9px/1 var(--font-display);
  letter-spacing: 0;
  white-space: nowrap;
  flex-shrink: 0;
}

.palette-group-items {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
}

.palette-group-collapsed .palette-group-items {
  display: none;
}

#modelingPanel:not(.hidden) .palette::-webkit-scrollbar {
  width: 7px;
}

.model-workbench-section {
  flex: 0 0 auto;
}

.model-tree {
  display: grid;
  gap: 5px;
  max-height: 170px;
  overflow: auto;
  padding-right: 2px;
}

.model-tree-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px;
  min-height: 30px;
  border-radius: 7px;
  border: 1px solid color-mix(in srgb, var(--border) 72%, transparent);
  background: color-mix(in srgb, var(--surface-3) 92%, var(--surface-high) 8%);
  color: var(--text);
  cursor: pointer;
  text-align: left;
  padding: 5px 7px;
}

.model-tree-item:hover {
  border-color: color-mix(in srgb, var(--accent) 42%, transparent);
  background: color-mix(in srgb, var(--surface-high) 92%, var(--surface-3) 8%);
}

.model-tree-kind,
.model-tree-count {
  color: var(--muted);
  font: 700 9px/1 var(--font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.model-tree-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: 600 11px/1.2 var(--font-ui);
}

.model-tree-empty {
  padding: 8px;
  border-radius: 7px;
  color: var(--muted);
  border: 1px dashed color-mix(in srgb, var(--border) 72%, transparent);
  font: 500 11px/1.3 var(--font-ui);
  text-align: center;
}

.layers-list {
  display: grid;
  gap: 5px;
  max-height: 145px;
  overflow: auto;
  padding-right: 2px;
}

.layer-toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 24px;
  color: var(--text);
  font: 600 11px/1.2 var(--font-ui);
}

.layer-toggle input {
  width: 14px;
  height: 14px;
  accent-color: var(--accent);
}

.palette-quick-action {
  display: flex;
  align-items: center;
  gap: 5px;
  min-width: 0;
  min-height: 28px;
  padding: 5px 6px;
  border-radius: 7px;
  border: 1px solid color-mix(in srgb, var(--border) 76%, transparent);
  border-left: 3px solid var(--node-accent, var(--border));
  background: color-mix(in srgb, var(--surface-3) 92%, var(--surface-high) 8%);
  color: var(--text);
  font: 600 10px/1.2 var(--font-ui);
  cursor: pointer;
  overflow: hidden;
  transition:
    transform var(--transition),
    background var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.palette-quick-action:hover {
  border-color: var(--node-accent, color-mix(in srgb, var(--outline) 58%, transparent));
  background: color-mix(in srgb, var(--surface-high) 92%, var(--surface-3) 8%);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.palette-quick-action.active {
  border-color: var(--node-accent, color-mix(in srgb, var(--outline) 58%, transparent));
  background: color-mix(in srgb, var(--surface-high) 92%, var(--surface-3) 8%);
}

.palette-quick-action-done {
  border-color: var(--node-accent, color-mix(in srgb, var(--outline) 58%, transparent));
  background: color-mix(in srgb, var(--surface-high) 92%, var(--surface-3) 8%);
}

.palette-quick-action-compact {
  min-height: 24px;
  padding: 4px 6px;
  font-size: 9px;
}

.palette-quick-action-done.palette-quick-action-compact {
  width: 82%;
  justify-self: end;
  border-color: color-mix(in srgb, var(--success) 56%, transparent);
  background: color-mix(in srgb, var(--success) 16%, var(--surface-high) 84%);
  color: color-mix(in srgb, var(--success) 72%, var(--text) 28%);
}

.palette-context-inline-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 5px;
  align-items: center;
}

.palette-context-inline-row .palette-quick-action {
  width: 100%;
}

.palette-context-inline-row .palette-quick-action-done.palette-quick-action-compact {
  width: auto;
  min-width: 56px;
}

.palette-quick-action-label {
  display: block;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.palette-item {
  display: flex;
  align-items: center;
  gap: 5px;
  min-width: 0;
  min-height: 26px;
  padding: 4px 6px;
  border-radius: 7px;
  border: 1px solid color-mix(in srgb, var(--border) 76%, transparent);
  border-left: 3px solid var(--node-accent, var(--border));
  background: color-mix(in srgb, var(--surface-3) 92%, var(--surface-high) 8%);
  color: var(--text);
  font: 600 10px/1.2 var(--font-ui);
  cursor: grab;
  user-select: none;
  transition:
    transform var(--transition),
    background var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
  overflow: hidden;
}

.palette-item:hover {
  border-color: var(--node-accent, color-mix(in srgb, var(--outline) 58%, transparent));
  background: color-mix(in srgb, var(--surface-high) 92%, var(--surface-3) 8%);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.palette-item:active {
  transform: scale(0.97);
  cursor: grabbing;
}

.palette-item-icon {
  display: inline-flex;
  flex-shrink: 0;
  width: 12px;
  height: 12px;
  object-fit: contain;
}

.palette-notation-icon {
  width: auto;
  min-width: 24px;
  height: 16px;
  padding: 0 4px;
  align-items: center;
  justify-content: center;
  border: 1px solid color-mix(in srgb, var(--node-accent, var(--accent)) 52%, transparent);
  border-radius: 4px;
  background: color-mix(in srgb, var(--node-accent, var(--accent)) 14%, transparent);
  color: var(--text-strong);
  font: 800 7px/1 var(--font-display);
  letter-spacing: 0.04em;
}

.palette-item-label {
  min-width: 0;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.palette-item-role {
  flex: 0 0 auto;
  padding: 2px 4px;
  border: 1px solid color-mix(in srgb, var(--node-accent, var(--accent)) 42%, transparent);
  border-radius: 999px;
  color: var(--muted-2);
  font: 800 7px/1 var(--font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.palette.palette-collapsed {
  grid-template-columns: 1fr;
}

.palette.palette-collapsed .palette-item {
  justify-content: center;
  min-height: 34px;
  padding: 5px 6px;
}

.palette.palette-collapsed .palette-item-icon {
  display: inline-flex;
}

.palette.palette-collapsed .palette-item-label,
.palette.palette-collapsed .palette-item-role,
.palette.palette-collapsed .palette-context-actions,
.palette.palette-collapsed .palette-group-title,
.palette.palette-collapsed .palette-group-items {
  display: none;
}

.workspace.palette-collapsed .left-pane {
  padding-inline: 8px;
  /* Removed opacity transition to improve FPS during collapse toggles */
}

.workspace.palette-collapsed .pane-shell {
  padding-inline: 8px;
}

.workspace.palette-collapsed .palette {
  /* Removed transitions to improve FPS during collapse toggles */
}

.workspace.palette-collapsed .palette-item,
.workspace.palette-collapsed .palette-search-row,
.workspace.palette-collapsed .sidebar-section-title,
.workspace.palette-collapsed .sidebar-section-hint {
  /* Removed transitions to improve FPS during collapse toggles */
}

.workspace.palette-collapsed .pane-shell #modelingPanel:not(.hidden) ~ * {
  display: none;
}

.workspace.palette-collapsed #modelingPanel:not(.hidden) .sidebar-section-header {
  justify-content: center;
}

.workspace.palette-collapsed #modelingPanel:not(.hidden) .sidebar-section-icon,
.workspace.palette-collapsed #modelingPanel:not(.hidden) .sidebar-section-title,
.workspace.palette-collapsed #modelingPanel:not(.hidden) .sidebar-section-hint {
  display: none;
}

.artifact-actions {
  display: flex;
  gap: 7px;
}

.palette-item-task-focus {
  outline: 2px solid color-mix(in srgb, var(--accent, #6366f1) 55%, transparent);
  outline-offset: -1px;
}

.admin-path-label {
  padding: 7px 8px;
  border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--border) 74%, transparent);
  background: color-mix(in srgb, var(--input-bg) 86%, var(--surface-contrast) 14%);
  color: var(--muted);
  font: 500 11px/1.3 var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 1100px) {
  .palette-group-items {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .left-pane {
    padding: 8px;
  }

  .pane-shell {
    border-radius: var(--radius-md);
  }

  .palette {
    grid-template-columns: 1fr;
  }

  .palette-group-items {
    grid-template-columns: 1fr;
  }

  .palette-item,
  .palette-quick-action,
  .sidebar-inline-action {
    min-height: 40px;
  }

  .sidebar-section-actions {
    margin-left: 0;
  }
}