/* DbcView — neutral tool workspace.
   One semantic token layer drives light/dark themes, Atlas chrome and every
   DBC panel. Structure is expressed with 1px dividers, spacing and type
   weight instead of saturated fills, thick outlines or hard shadows.

   Contrast contract (WCAG AA):
   - body text >= 4.5:1, UI indicators >= 3:1 on their actual surface;
   - focus rings use --dv-focus, which is contrast-checked against the
     surface, chrome and page background tokens. */

:root {
  color-scheme: light dark;

  --dv-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
  --dv-font-mono: "SFMono-Regular", "Cascadia Code", Consolas, "Liberation Mono", monospace;

  /* Surfaces and text — light */
  --dv-bg: #f6f7f9;
  --dv-surface: #ffffff;
  --dv-chrome: #fbfcfd;
  --dv-sunken: #f1f3f5;
  --dv-text: #1f2328;
  --dv-text-secondary: #57606a;
  --dv-text-muted: #6e7781;
  --dv-text-disabled: #8c959f;
  --dv-border: #d0d7de;
  --dv-divider: #e6e9ed;

  /* Interaction */
  --dv-accent: #0969da;
  --dv-accent-strong: #0757b8;
  --dv-on-accent: #ffffff;
  --dv-hover: #f2f4f7;
  --dv-selection: #e8f0fb;
  --dv-focus: #0969da;

  /* Feedback */
  --dv-danger: #cf222e;
  --dv-danger-bg: #fff1f0;
  --dv-danger-text: #a40e26;
  --dv-warning: #9a6700;
  --dv-warning-bg: #fff8c5;
  --dv-warning-text: #7d4e00;
  --dv-success: #1a7f37;
  --dv-success-bg: #e9f7ee;
  --dv-success-text: #116329;

  background: var(--dv-bg);
  color: var(--dv-text);
  font-family: var(--dv-font-sans);
  font-size: 16px;
  line-height: 1.45;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Surfaces and text — dark */
    --dv-bg: #0d1117;
    --dv-surface: #161b22;
    --dv-chrome: #161b22;
    --dv-sunken: #10151c;
    --dv-text: #e6edf3;
    --dv-text-secondary: #b1bac4;
    --dv-text-muted: #8b949e;
    --dv-text-disabled: #6e7681;
    --dv-border: #30363d;
    --dv-divider: #21262d;

    /* Interaction */
    --dv-accent: #58a6ff;
    --dv-accent-strong: #79b8ff;
    --dv-on-accent: #0d1117;
    --dv-hover: #21262d;
    --dv-selection: #1f3550;
    --dv-focus: #58a6ff;

    /* Feedback */
    --dv-danger: #ff7b72;
    --dv-danger-bg: #2d1214;
    --dv-danger-text: #ffb3ad;
    --dv-warning: #d29922;
    --dv-warning-bg: #2b2110;
    --dv-warning-text: #ffd580;
    --dv-success: #3fb950;
    --dv-success-bg: #0f2a19;
    --dv-success-text: #7ee787;
  }
}

html,
body,
#app,
.dbc-view-shell,
.dbc-view-shell > .atlas-v2-workspace {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  min-width: 20rem;
  background: var(--dv-bg);
  color: var(--dv-text);
  font-size: 0.8125rem;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

::selection {
  background: var(--dv-accent);
  color: var(--dv-on-accent);
}

:focus-visible {
  outline: 2px solid var(--dv-focus);
  outline-offset: 2px;
}

#blazor-error-ui {
  display: none;
}

.dbc-icon {
  flex: 0 0 auto;
  display: inline-block;
  vertical-align: middle;
  pointer-events: none;
}

.dbc-view-loading {
  display: grid;
  min-height: 100%;
  place-items: center;
  background: var(--dv-bg);
  color: var(--dv-text-muted);
  font-size: 13px;
}

/* ============================================================
   Atlas chrome contract. Atlas exposes CSS variables for its
   surfaces and effect sizes, so the workspace follows the token
   layer without patching private behaviour.
   ============================================================ */
.dbc-view-shell .atlas-v2-workspace {
  --atlas-accent: var(--dv-accent);
  --atlas-surface: var(--dv-surface);
  --atlas-text: var(--dv-text);
  --atlas-splitter-size: 0.3rem;
  --atlas-splitter-hit-area: 0.25rem;
  --atlas-chrome-height: 2.125rem;
  --atlas-gap: 0.25rem;
  --atlas-padding-compact: 0.25rem 0.5rem;
  --atlas-radius: 4px;
  --atlas-radius-sm: 4px;
  --atlas-border-width: 1px;
  --atlas-focus-ring-width: 2px;
  --atlas-splitter-opacity: 1;
  --atlas-splitter-opacity-hover: 1;
  --atlas-splitter-opacity-focus: 1;
  --atlas-drop-highlight-alpha-soft: 12%;
  --atlas-drop-highlight-alpha-strong: 20%;
  --atlas-toolbar-divider-opacity: 0.5;
  --atlas-drag-preview-opacity: 0.98;
  --atlas-drag-preview-shadow: 0 8px 24px rgb(0 0 0 / 18%);
  --atlas-group-bg: var(--dv-surface);
  --atlas-chrome-bg: var(--dv-chrome);
  --atlas-tab-text: var(--dv-text-secondary);
  --atlas-tab-text-active: var(--dv-text);
  --atlas-tab-bg-active: var(--dv-surface);
  --atlas-tab-bg-hover: var(--dv-hover);
  --atlas-splitter-color: var(--dv-border);
  background: var(--dv-bg);
  color: var(--dv-text);
  font-family: var(--dv-font-sans);
}

.dbc-view-shell {
  display: flex;
  flex-direction: column;
  background: var(--dv-bg);
}

.dbc-view-shell > .atlas-v2-workspace {
  flex: 1 1 auto;
  min-height: 0;
  height: auto;
  grid-template-columns: minmax(0, 1fr);
}

.atlas-v2-top-toolbar,
.atlas-v2-status-bar {
  min-width: 0;
  overflow: hidden;
}

.atlas-v2-top-toolbar {
  background: var(--dv-chrome);
  border-bottom: 1px solid var(--dv-border);
}

.atlas-v2-status-bar {
  background: var(--dv-chrome);
  border-top: 1px solid var(--dv-border);
}

.dbc-view-shell .atlas-v2-work-area {
  background: var(--dv-bg);
}

.dbc-view-shell .atlas-v2-work-area,
.dbc-view-shell .atlas-v2-split,
.dbc-view-shell .atlas-v2-group,
.dbc-view-shell .atlas-v2-content-stack,
.dbc-view-shell .atlas-v2-content-outlet {
  min-width: 0;
  min-height: 0;
}

.dbc-view-shell .atlas-v2-group {
  border: 1px solid var(--dv-border);
  border-radius: 4px;
  background: var(--dv-surface);
}

.dbc-view-shell .atlas-v2-panel-header,
.dbc-view-shell .atlas-v2-tab-strip {
  min-height: 2.125rem;
  box-sizing: border-box;
  align-items: center;
  border-bottom: 1px solid var(--dv-divider);
  background: var(--dv-chrome);
  color: var(--dv-text-secondary);
  user-select: none;
}

.dbc-view-shell .atlas-v2-panel-header {
  gap: 0.5rem;
  padding: 0 0.75rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.dbc-view-shell .atlas-v2-item-icon:empty {
  display: none;
}

.dbc-view-shell .atlas-v2-tab-strip {
  gap: 0.125rem;
  padding-inline: 0.375rem;
}

.dbc-view-shell .atlas-v2-tab-strip [role="tab"] {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-height: 2.125rem;
  max-width: 15rem;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  padding: 0 0.75rem;
  background: transparent;
  color: var(--dv-text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-view-shell .atlas-v2-tab-strip [role="tab"]:hover:not([aria-selected="true"]) {
  background: var(--dv-hover);
  color: var(--dv-text);
}

.dbc-view-shell .atlas-v2-tab-strip [role="tab"][aria-selected="true"] {
  background: var(--dv-surface);
  color: var(--dv-text);
  box-shadow: inset 0 -2px 0 var(--dv-accent);
}

.dbc-view-shell .atlas-v2-toolbar {
  width: 2.375rem;
  height: 100%;
  box-sizing: border-box;
  align-items: center;
  padding: 0.25rem 0;
  background: var(--dv-chrome);
}

.dbc-view-shell .atlas-v2-toolbar[data-atlas-toolbar-side="inline-start"] {
  border-inline-end: 1px solid var(--dv-border);
}

.dbc-view-shell .atlas-v2-toolbar[data-atlas-toolbar-side="inline-end"] {
  border-inline-start: 1px solid var(--dv-border);
}

.dbc-view-shell .atlas-v2-toolbar-region {
  width: 100%;
}

.dbc-view-shell .atlas-v2-toolbar button {
  width: 1.875rem;
  min-height: 0;
  margin: 0.125rem auto;
  overflow: hidden;
  border: 0;
  border-radius: 4px;
  padding: 0.5rem 0.1875rem;
  background: transparent;
  color: var(--dv-text-secondary);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.dbc-view-shell .atlas-v2-toolbar button:hover {
  background: var(--dv-hover);
  color: var(--dv-text);
}

.dbc-view-shell .atlas-v2-toolbar button[aria-selected] {
  background: var(--dv-selection);
  color: var(--dv-text);
  box-shadow: inset 2px 0 0 var(--dv-accent);
}

.dbc-view-shell .atlas-v2-toolbar-divider {
  width: 1.25rem;
  margin: 0.25rem auto;
  border-block-start: 1px solid var(--dv-divider);
  opacity: 1;
}

.dbc-view-shell .atlas-v2-toolbar-section-divider {
  display: none;
}

/* 4px split tracks with a 1px visual line and a wide pointer target. */
.dbc-view-shell .atlas-v2-splitter {
  background: transparent;
  color: var(--dv-border);
  opacity: 1;
}

.dbc-view-shell .atlas-v2-splitter::after {
  content: "";
  position: absolute;
  background: var(--dv-border);
}

.dbc-view-shell .atlas-v2-split-inline > .atlas-v2-splitter::after {
  inset-block: 0;
  inset-inline-start: 50%;
  width: 1px;
}

.dbc-view-shell .atlas-v2-split-block > .atlas-v2-splitter::after {
  inset-inline: 0;
  inset-block-start: 50%;
  height: 1px;
}

.dbc-view-shell .atlas-v2-splitter:hover,
.dbc-view-shell .atlas-v2-split[data-atlas-resizing="true"] > .atlas-v2-splitter {
  background: transparent;
}

.dbc-view-shell .atlas-v2-splitter:hover::after,
.dbc-view-shell .atlas-v2-split[data-atlas-resizing="true"] > .atlas-v2-splitter::after {
  background: var(--dv-accent);
}

.dbc-view-shell .atlas-v2-splitter:focus-visible {
  outline: 2px solid var(--dv-focus);
  outline-offset: 0;
}

.dbc-view-shell .atlas-v2-content-outlet:focus-visible {
  outline: 2px solid var(--dv-focus);
  outline-offset: -2px;
}

/* ============================================================
   Top toolbar (46px) — identity plus real Atlas layout history.
   ============================================================ */
.dbc-view-topbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  height: 2.875rem;
  box-sizing: border-box;
  padding: 0 0.75rem;
  background: var(--dv-chrome);
  color: var(--dv-text);
}

.dbc-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.dbc-brand-mark {
  display: grid;
  width: 1.625rem;
  height: 1.625rem;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 6px;
  background: var(--dv-accent);
  color: var(--dv-on-accent);
}

.dbc-view-title {
  overflow: hidden;
  color: var(--dv-text);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  margin-inline-start: auto;
}

.dbc-icon-button {
  display: inline-grid;
  width: 1.875rem;
  height: 1.875rem;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 0;
  background: transparent;
  color: var(--dv-text-secondary);
  cursor: pointer;
}

.dbc-icon-button:not(:disabled):hover {
  border-color: var(--dv-border);
  background: var(--dv-hover);
  color: var(--dv-text);
}

.dbc-icon-button:disabled {
  color: var(--dv-text-disabled);
  cursor: default;
}

/* ============================================================
   Status bar (26px) — real operation, document, diagnostics and
   revision state only.
   ============================================================ */
.dbc-view-statusbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: 1.625rem;
  box-sizing: border-box;
  padding: 0 0.75rem;
  background: var(--dv-chrome);
  color: var(--dv-text-secondary);
  font-size: 0.6875rem;
  line-height: 1;
}

.dbc-statusbar-message {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-statusbar-items {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  max-width: 62%;
  margin-inline-start: auto;
  overflow: hidden;
  flex: 0 1 auto;
}

.dbc-statusbar-item {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-width: 0;
  white-space: nowrap;
}

.dbc-statusbar-item + .dbc-statusbar-item {
  padding-inline-start: 0.625rem;
  border-inline-start: 1px solid var(--dv-divider);
}

.dbc-statusbar-text {
  overflow: hidden;
  max-width: 18rem;
  text-overflow: ellipsis;
}

.dbc-statusbar-diagnostic.is-error {
  color: var(--dv-danger-text);
}

.dbc-statusbar-diagnostic.is-warning {
  color: var(--dv-warning-text);
}

.dbc-statusbar-button {
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.dbc-statusbar-button:hover {
  text-decoration: underline;
}

.dbc-statusbar-button:focus-visible {
  border-radius: 2px;
  outline: 2px solid var(--dv-focus);
  outline-offset: 2px;
}

.dbc-view-verification {
  display: grid;
  width: 100vw;
  height: 100vh;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  background: var(--dv-border);
}

.dbc-view-verification > section {
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--dv-bg);
}

.dbc-view-verification-link {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 2;
  margin: 0;
  padding: 0.375rem 0.625rem;
  border: 1px solid var(--dv-border);
  border-radius: 4px;
  background: var(--dv-surface);
  font-size: 0.75rem;
}

.dbc-view-verification-link a {
  color: var(--dv-accent);
}

.dbc-perf {
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-height: 0;
  box-sizing: border-box;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--dv-bg);
  color: var(--dv-text);
}

.dbc-perf-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.dbc-perf-header h1 {
  margin: 0;
  font-size: 1rem;
}

.dbc-perf-header p {
  flex: 1 1 20rem;
  margin: 0;
  color: var(--dv-text-secondary);
  font-size: 0.75rem;
}

.dbc-perf-report {
  max-height: 10rem;
  margin: 0;
  overflow: auto;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--dv-border);
  border-radius: 4px;
  background: var(--dv-surface);
  font-family: var(--dv-font-mono);
  font-size: 0.71875rem;
  white-space: pre-wrap;
}

.dbc-perf-table {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  border: 1px solid var(--dv-border);
  border-radius: 4px;
  background: var(--dv-surface);
}

/* ============================================================
   Shared panel primitives.
   ============================================================ */
.dbc-action {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  height: 1.75rem;
  box-sizing: border-box;
  border: 1px solid var(--dv-border);
  border-radius: 4px;
  padding: 0 0.625rem;
  background: var(--dv-surface);
  color: var(--dv-text);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}

.dbc-action:hover {
  background: var(--dv-hover);
}

.dbc-action.primary {
  border-color: var(--dv-accent);
  background: var(--dv-accent);
  color: var(--dv-on-accent);
}

.dbc-action.primary:hover {
  border-color: var(--dv-accent-strong);
  background: var(--dv-accent-strong);
}

.dbc-empty-state {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  max-width: 17.5rem;
  margin: auto;
  padding: 1.5rem 1.25rem;
  color: var(--dv-text-muted);
}

.dbc-empty-state .dbc-icon {
  color: var(--dv-text-disabled);
}

.dbc-empty-title {
  margin: 0;
  color: var(--dv-text);
  font-size: 0.8125rem;
  font-weight: 600;
}

.dbc-empty-hint {
  margin: 0;
  color: var(--dv-text-muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.dbc-empty {
  margin: 0;
  padding: 0.5rem 0.625rem;
  color: var(--dv-text-muted);
  font-size: 0.75rem;
}

.dbc-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border: 0;
  padding: 0;
  background: none;
  color: var(--dv-accent);
  font: inherit;
  font-weight: 500;
  text-align: start;
  cursor: pointer;
}

.dbc-link:hover {
  text-decoration: underline;
}

/* ============================================================
   Explorer.
   ============================================================ */
.dbc-tree {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-width: 0;
  min-height: 0;
  box-sizing: border-box;
  overflow: hidden;
  padding: 0.5rem 0 0.75rem;
  background: var(--dv-surface);
  color: var(--dv-text);
  font-size: 0.78125rem;
}

.dbc-tree-actions {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  flex-wrap: wrap;
  padding: 0 0.5rem 0.375rem;
}

.dbc-upload {
  position: relative;
  display: inline-flex;
  align-items: center;
  border-radius: 4px;
  cursor: pointer;
}

/* Visually hidden but focusable: the native picker stays keyboard
   reachable and the label shows the focus ring through :focus-within. */
.dbc-upload input[type="file"] {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  margin: 0;
  padding: 0;
  border: 0;
  opacity: 0;
  overflow: hidden;
}

.dbc-upload:focus-within {
  outline: 2px solid var(--dv-focus);
  outline-offset: 2px;
}

.dbc-upload-target {
  margin: 0;
  padding: 0 0.625rem 0.5rem;
  color: var(--dv-text-muted);
  font-size: 0.71875rem;
  line-height: 1.4;
}

.dbc-upload-target strong {
  color: var(--dv-text);
  font-family: var(--dv-font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
}

.dbc-tree-icon {
  color: var(--dv-text-muted);
}

.dbc-tree-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-tree-message,
.dbc-alert {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin: 0.5rem 0.625rem 0;
  border: 1px solid var(--dv-success);
  border-radius: 4px;
  padding: 0.5rem 0.625rem;
  background: var(--dv-success-bg);
  color: var(--dv-success-text);
  font-size: 0.75rem;
  line-height: 1.5;
}

.dbc-tree-message {
  margin: 0 0.5rem 0.5rem;
}

.dbc-tree-message.error,
.dbc-alert.error {
  border-color: var(--dv-danger);
  background: var(--dv-danger-bg);
  color: var(--dv-danger-text);
}

.dbc-alert.warning {
  border-color: var(--dv-warning);
  background: var(--dv-warning-bg);
  color: var(--dv-warning-text);
}

.dbc-alert.success {
  border-color: var(--dv-success);
  background: var(--dv-success-bg);
  color: var(--dv-success-text);
}

.dbc-alert-body {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}

.dbc-alert-title {
  margin: 0;
  font-weight: 600;
}

.dbc-tree-message > span,
.dbc-alert > span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.dbc-tree > .dbc-empty-state {
  max-width: none;
  margin: 0.5rem 0 0;
  padding: 0.75rem 0.625rem;
}

.dbc-diagnostics {
  display: grid;
  gap: 0.1875rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.dbc-diagnostic {
  display: flex;
  align-items: baseline;
  gap: 0.375rem;
  min-width: 0;
}

.dbc-diagnostic-code {
  flex: 0 0 auto;
  border: 1px solid currentColor;
  border-radius: 3px;
  padding: 0 0.25rem;
  font-family: var(--dv-font-mono);
  font-size: 0.625rem;
  font-weight: 600;
  line-height: 1.4;
}

.dbc-diagnostic > span:last-child {
  overflow-wrap: anywhere;
}

/* ============================================================
   Problems panel (Astrea ResourceTable).
   ============================================================ */
.dbc-problems-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  box-sizing: border-box;
  padding: 0.5rem 0.625rem;
  background: var(--dv-surface);
  color: var(--dv-text);
  font-size: 0.75rem;
}

/* Astrea defines --ast-rt-* on its own root element, so the theme override
   must land on that same element (via ContainerCss), not on an ancestor. */
.dbc-problems-panel .dbc-problems-table {
  --ast-rt-font-family: var(--dv-font-sans);
  --ast-rt-font-size: 0.75rem;
  --ast-rt-color-text: var(--dv-text);
  --ast-rt-color-bg: var(--dv-surface);
  --ast-rt-color-header-bg: var(--dv-sunken);
  --ast-rt-color-border: var(--dv-divider);
  --ast-rt-color-border-strong: var(--dv-border);
  --ast-rt-color-accent: var(--dv-accent);
  --ast-rt-color-hover-bg: var(--dv-hover);
  --ast-rt-color-selected-bg: var(--dv-selection);
  --ast-rt-color-scroll-thumb: var(--dv-border);
  --ast-rt-color-scroll-track: var(--dv-sunken);
  --ast-rt-th-content-padding: 0.5rem;
  flex: 1 1 auto;
  height: auto;
  min-height: 0;
  padding-left: 0;
}

.dbc-problems-panel:focus-visible {
  outline: 2px solid var(--dv-focus);
  outline-offset: -2px;
}

.dbc-problems-panel .ast-rt-table th,
.dbc-problems-panel .ast-rt-table td {
  padding: 0 0.5rem;
  text-align: start;
}

.dbc-problems-panel .ast-rt-table td {
  height: 1.75rem;
  line-height: 1.75rem;
}

.dbc-problems-panel .ast-rt-th-content {
  padding-right: 0.5rem;
  text-align: start;
}

.dbc-problem-row {
  cursor: pointer;
}

.dbc-problem-row:hover td {
  background: var(--dv-hover);
}

.dbc-problem-row:focus-visible {
  outline: 2px solid var(--dv-focus);
  outline-offset: -2px;
}

.dbc-problem-row[data-severity="error"] .dbc-problem-severity {
  color: var(--dv-danger-text);
  font-weight: 600;
}

.dbc-problem-row[data-severity="warning"] .dbc-problem-severity {
  color: var(--dv-warning-text);
  font-weight: 600;
}

.dbc-problem-line,
.dbc-problem-code {
  color: var(--dv-text-secondary);
  font-family: var(--dv-font-mono);
  font-size: 0.6875rem;
}

.dbc-problem-message {
  color: var(--dv-text);
}

.dbc-problems-panel .dbc-problems-empty {
  padding: 0.75rem 0.5rem;
  color: var(--dv-text-muted);
  text-align: start;
}

/* ============================================================
   Editor.
   ============================================================ */
.dbc-editor {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-width: 0;
  min-height: 0;
  background: var(--dv-surface);
  color: var(--dv-text);
  font-size: 0.78125rem;
}

.dbc-editor-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.375rem;
  box-sizing: border-box;
  padding: 0 0.625rem;
  border-bottom: 1px solid var(--dv-divider);
  background: var(--dv-chrome);
}

.dbc-editor-file {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  color: var(--dv-text-secondary);
  font-family: var(--dv-font-mono);
  font-size: 0.71875rem;
  font-weight: 500;
}

.dbc-editor-file-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-segmented {
  display: inline-flex;
  flex: 0 0 auto;
  gap: 0.125rem;
  border: 1px solid var(--dv-border);
  border-radius: 5px;
  padding: 0.125rem;
  background: var(--dv-sunken);
}

.dbc-segmented button {
  height: 1.5rem;
  border: 0;
  border-radius: 3px;
  padding: 0 0.625rem;
  background: transparent;
  color: var(--dv-text-secondary);
  font-size: 0.71875rem;
  font-weight: 500;
  cursor: pointer;
}

.dbc-segmented button:hover {
  color: var(--dv-text);
}

.dbc-segmented button[aria-pressed="true"] {
  background: var(--dv-surface);
  color: var(--dv-accent);
  box-shadow: 0 0 0 1px var(--dv-border);
  font-weight: 600;
}

.dbc-editor-text {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  min-height: 0;
}

.dbc-textarea {
  flex: 1 1 auto;
  min-height: 0;
  resize: none;
  border: 0;
  border-radius: 0;
  padding: 0.75rem 1rem;
  background: var(--dv-surface);
  color: var(--dv-text);
  font-family: var(--dv-font-mono);
  font-size: 0.78125rem;
  line-height: 1.65;
  tab-size: 4;
}

.dbc-textarea:focus-visible {
  outline: 2px solid var(--dv-focus);
  outline-offset: -2px;
}

.dbc-editor-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-top: 1px solid var(--dv-divider);
  background: var(--dv-chrome);
}

.dbc-editor-table {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  min-height: 0;
  background: var(--dv-surface);
}

.dbc-table-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2rem;
  box-sizing: border-box;
  padding: 0 0.625rem;
  border-bottom: 1px solid var(--dv-divider);
  background: var(--dv-surface);
}

.dbc-table-summary {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  color: var(--dv-text-secondary);
  font-size: 0.6875rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-table-actions {
  display: inline-flex;
  flex: 0 0 auto;
  gap: 0.25rem;
}

.dbc-table-actions .dbc-action {
  padding-inline: 0.5rem;
  font-size: 0.6875rem;
}

.dbc-table {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  min-height: 0;
  font-size: 0.75rem;
  --dbc-row-columns: 6rem minmax(0, 1fr) 4rem 5rem 9rem;
}

.dbc-table-head {
  flex: 0 0 auto;
  padding-right: var(--dbc-scrollbar-gutter, 0px);
  border-bottom: 1px solid var(--dv-border);
  background: var(--dv-sunken);
}

.dbc-table-body {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  scrollbar-gutter: stable;
  background: var(--dv-surface);
}

.dbc-table-row {
  display: grid;
  grid-template-columns: var(--dbc-row-columns);
  align-items: center;
  height: 32px;
  box-sizing: border-box;
}

.dbc-table-header {
  height: 2rem;
  color: var(--dv-text-secondary);
  font-size: 0.65625rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 2rem;
  text-transform: uppercase;
}

.dbc-cell {
  min-width: 0;
  padding: 0 0.625rem;
  overflow: hidden;
  line-height: 31px;
  text-align: start;
  text-overflow: ellipsis;
  white-space: nowrap;
  box-shadow: inset 0 -1px 0 var(--dv-divider);
}

.dbc-table-header .dbc-cell {
  box-shadow: none;
  line-height: 2rem;
}

.dbc-table-body .dbc-table-row:hover {
  background: var(--dv-hover);
}

.dbc-message-row.is-selected,
.dbc-signal-row.is-selected {
  background: var(--dv-selection);
  box-shadow: inset 2px 0 0 var(--dv-accent);
}

.dbc-table-body .dbc-table-row.is-selected:hover {
  background: var(--dv-selection);
}

.dbc-message-row .dbc-cell-id,
.dbc-message-row .dbc-cell-length {
  color: var(--dv-text-secondary);
  font-family: var(--dv-font-mono);
  font-size: 0.71875rem;
}

.dbc-signal-row .dbc-cell {
  color: var(--dv-text-secondary);
  font-size: 0.71875rem;
}

.dbc-row-name {
  padding-inline: 0.625rem;
}

.dbc-row-name-inner {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  min-width: 0;
}

.dbc-row-toggle,
.dbc-row-toggle-spacer {
  display: inline-flex;
  flex: 0 0 1.125rem;
  align-items: center;
  justify-content: center;
  width: 1.125rem;
  height: 1.25rem;
}

.dbc-row-toggle {
  border: 0;
  border-radius: 3px;
  padding: 0;
  background: none;
  color: var(--dv-text-secondary);
  cursor: pointer;
}

.dbc-row-toggle:hover {
  background: var(--dv-hover);
  color: var(--dv-text);
}

.dbc-row-toggle:focus-visible {
  outline: 2px solid var(--dv-focus);
  outline-offset: 1px;
}

.dbc-row-focus {
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-row-focus:focus-visible {
  outline: 2px solid var(--dv-focus);
  outline-offset: 1px;
  border-radius: 2px;
}

.dbc-row-label {
  display: block;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-signal-link {
  color: var(--dv-text-secondary);
  font-weight: 400;
}

.dbc-signal-link:hover {
  color: var(--dv-text);
}

/* ============================================================
   Properties.
   ============================================================ */
.dbc-property {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  height: 100%;
  min-width: 0;
  min-height: 0;
  box-sizing: border-box;
  overflow: auto;
  padding: 0.75rem;
  background: var(--dv-surface);
  color: var(--dv-text);
  font-size: 0.78125rem;
}

.dbc-property-header {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid var(--dv-divider);
}

.dbc-property-type {
  color: var(--dv-text-muted);
  font-size: 0.65625rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.dbc-property-name {
  overflow-wrap: anywhere;
  color: var(--dv-text);
  font-family: var(--dv-font-mono);
  font-size: 0.78125rem;
  font-weight: 600;
}

.dbc-property-list {
  display: grid;
  grid-template-columns: minmax(4.5rem, max-content) minmax(0, 1fr);
  gap: 0.375rem 0.75rem;
  align-items: baseline;
  margin: 0;
}

.dbc-property-list dt {
  color: var(--dv-text-muted);
  font-size: 0.71875rem;
}

.dbc-property-list dd {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--dv-text);
  font-family: var(--dv-font-mono);
  font-size: 0.75rem;
}

/* ============================================================
   Compact layout (<= 700px): one reachable panel plus an explicit
   Explorer / Editor / Properties switcher. The wide three-column
   layout is replaced, not hidden behind overflow.
   ============================================================ */
.dbc-compact-nav {
  display: none;
}

@media (max-width: 700px) {
  .dbc-table {
    --dbc-row-columns: 5rem minmax(0, 1fr) 3.5rem 4.5rem 6rem;
  }

  .dbc-compact-nav {
    display: flex;
    gap: 0.125rem;
    height: 2.375rem;
    box-sizing: border-box;
    padding: 0 0.5rem;
    border-bottom: 1px solid var(--dv-border);
    background: var(--dv-chrome);
  }

  .dbc-compact-nav button {
    flex: 1 1 0;
    min-width: 0;
    border: 0;
    border-bottom: 2px solid transparent;
    padding: 0 0.25rem;
    background: transparent;
    color: var(--dv-text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
  }

  .dbc-compact-nav button:hover {
    color: var(--dv-text);
  }

  .dbc-compact-nav button[aria-pressed="true"] {
    border-bottom-color: var(--dv-accent);
    color: var(--dv-text);
    font-weight: 600;
  }

  .dbc-view-shell > .atlas-v2-workspace {
    flex: 1 1 auto;
    height: auto;
    min-height: 0;
  }

  .dbc-view-shell .atlas-v2-work-area {
    grid-template-columns: minmax(0, 1fr);
  }

  .dbc-view-shell .atlas-v2-toolbar {
    display: none;
  }

  .dbc-view-shell .atlas-v2-split {
    display: contents;
  }

  .dbc-view-shell .atlas-v2-splitter {
    display: none;
  }

  .dbc-view-shell .atlas-v2-group {
    display: none;
    visibility: visible;
    border: 0;
    border-radius: 0;
  }

  .dbc-view-shell .atlas-v2-split[data-atlas-split-hidden],
  .dbc-view-shell .atlas-v2-group-collapsed {
    visibility: visible;
  }

  .dbc-view-shell[data-compact-active="explorer"] [data-atlas-group-id="left-upper"],
  .dbc-view-shell[data-compact-active="editor"] [data-atlas-group-id="editor"],
  .dbc-view-shell[data-compact-active="properties"] [data-atlas-group-id="right-upper"],
  .dbc-view-shell[data-compact-active="problems"] [data-atlas-group-id="bottom-left"] {
    display: grid;
  }

  .dbc-view-verification {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 100vh 100vh;
    overflow-y: auto;
  }

  .dbc-view-topbar {
    gap: 0.375rem;
    padding-inline: 0.5rem;
  }

  .dbc-view-statusbar {
    gap: 0.5rem;
    padding-inline: 0.5rem;
  }

  .dbc-statusbar-items {
    max-width: 58%;
  }
}

@media (max-width: 480px) {
  .dbc-view-title {
    font-size: 0.75rem;
  }

  .dbc-view-statusbar {
    font-size: 0.65625rem;
  }

  /* The operation message already carries the opened path on phones; keep
     diagnostics and revision visible instead of clipping the row. */
  .dbc-statusbar-document {
    display: none;
  }

  .dbc-statusbar-text {
    max-width: 6rem;
  }

  .dbc-statusbar-items {
    gap: 0.375rem;
    max-width: 62%;
  }

  .dbc-statusbar-item + .dbc-statusbar-item {
    padding-inline-start: 0.375rem;
  }

  .dbc-editor-toolbar {
    gap: 0.375rem;
    padding-inline: 0.5rem;
  }

  .dbc-segmented button {
    padding-inline: 0.5rem;
  }

  .dbc-action {
    padding-inline: 0.5rem;
    font-size: 0.71875rem;
  }

  .dbc-tree-actions {
    gap: 0.25rem;
  }

  .dbc-compact-nav button {
    font-size: 0.71875rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dbc-view-shell *,
  .dbc-view-shell *::before,
  .dbc-view-shell *::after {
    transition-duration: 0s !important;
    animation-duration: 0s !important;
  }
}

/* ============================================================
   Command palette (workspace-level native dialog).
   ============================================================ */
.dbc-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.dbc-palette {
  display: flex;
  flex-direction: column;
  width: min(42rem, calc(100vw - 2rem));
  max-height: min(34rem, calc(100vh - 4rem));
  box-sizing: border-box;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--dv-border);
  border-radius: 8px;
  background: var(--dv-surface);
  color: var(--dv-text);
  box-shadow: 0 18px 48px rgba(13, 17, 23, 0.32);
}

.dbc-palette::backdrop {
  background: rgba(13, 17, 23, 0.45);
}

.dbc-palette-body {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.dbc-palette-search {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.625rem;
  border-bottom: 1px solid var(--dv-divider);
  color: var(--dv-text-secondary);
}

.dbc-palette-search:focus-within {
  box-shadow: inset 0 -2px 0 var(--dv-focus);
}

.dbc-palette-input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  padding: 0.25rem 0;
  background: transparent;
  color: var(--dv-text);
  font: inherit;
  font-size: 0.9375rem;
  outline: none;
}

.dbc-palette-hint {
  margin: 0;
  padding: 1rem 0.875rem;
  color: var(--dv-text-secondary);
  font-size: 0.8125rem;
}

.dbc-palette-results {
  min-height: 0;
  padding: 0.25rem;
  overflow-y: auto;
}

.dbc-palette-group {
  padding: 0.5rem 0.75rem 0.25rem;
  color: var(--dv-text-muted);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.dbc-palette-option {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.4rem 0.75rem;
  border-radius: 5px;
  cursor: pointer;
}

.dbc-palette-option:hover,
.dbc-palette-option.is-active {
  background: var(--dv-selection);
}

.dbc-palette-option-title {
  color: var(--dv-text);
  font-family: var(--dv-font-mono);
  font-size: 0.8125rem;
}

.dbc-palette-option-meta {
  overflow: hidden;
  color: var(--dv-text-secondary);
  font-size: 0.75rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-palette-footer {
  border-top: 1px solid var(--dv-divider);
  padding: 0.375rem 0.75rem;
  color: var(--dv-text-muted);
  font-size: 0.6875rem;
}

@media (max-width: 700px) {
  .dbc-palette {
    width: calc(100vw - 1rem);
    max-height: calc(100vh - 3rem);
  }
}

/* ============================================================
   Semantic Properties sections and value-table viewer.
   ============================================================ */
.dbc-property-section {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding-top: 0.625rem;
  border-top: 1px solid var(--dv-divider);
}

.dbc-property-section-title {
  margin: 0;
  color: var(--dv-text-muted);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.dbc-property-muted {
  color: var(--dv-text-muted);
  font-size: 0.6875rem;
  font-weight: 400;
}

.dbc-semantic-list {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.dbc-comment {
  padding: 0.375rem 0.5rem;
  border: 1px solid var(--dv-divider);
  border-radius: 5px;
  background: var(--dv-sunken);
}

.dbc-comment.is-highlighted {
  border-color: var(--dv-accent);
  background: var(--dv-selection);
}

.dbc-comment-text {
  margin: 0 0 0.25rem;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.dbc-source-line {
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--dv-accent);
  font: inherit;
  font-size: 0.6875rem;
  text-decoration: underline;
  cursor: pointer;
}

.dbc-source-line:hover {
  color: var(--dv-accent-strong);
}

.dbc-attributes {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.dbc-attribute {
  padding: 0.375rem 0.5rem;
  border: 1px solid var(--dv-divider);
  border-radius: 5px;
}

.dbc-attribute-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
}

.dbc-attribute-name {
  overflow-wrap: anywhere;
  font-family: var(--dv-font-mono);
  font-weight: 600;
}

.dbc-attribute-value {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-top: 0.2rem;
}

.dbc-attribute-value code {
  overflow-wrap: anywhere;
  font-family: var(--dv-font-mono);
}

.dbc-attribute-meta {
  margin-top: 0.15rem;
  overflow-wrap: anywhere;
  color: var(--dv-text-secondary);
  font-size: 0.6875rem;
}

.dbc-source-badge,
.dbc-badge {
  border: 1px solid var(--dv-border);
  border-radius: 999px;
  padding: 0 0.35rem;
  color: var(--dv-text-secondary);
  font-size: 0.625rem;
  line-height: 1.4;
}

.dbc-source-badge.is-explicit {
  border-color: var(--dv-success);
  color: var(--dv-success-text);
}

.dbc-source-badge.is-undefined {
  border-color: var(--dv-warning);
  color: var(--dv-warning-text);
}

.dbc-source-badge.is-default {
  color: var(--dv-text-secondary);
}

.dbc-source-badge.is-definition {
  color: var(--dv-text-muted);
}

.dbc-value-table-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.dbc-value-preview {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 0.25rem 0.75rem;
  margin: 0;
}

.dbc-value-preview dt {
  color: var(--dv-text);
  font-family: var(--dv-font-mono);
}

.dbc-value-preview dd {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--dv-text-secondary);
}

.dbc-statement-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.dbc-statement-group-title {
  margin: 0.25rem 0 0;
  font-family: var(--dv-font-mono);
  font-size: 0.71875rem;
}

.dbc-statement {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
}

.dbc-statement-preview {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--dv-text-secondary);
  font-family: var(--dv-font-mono);
  font-size: 0.6875rem;
}

.dbc-value-dialog {
  width: min(36rem, calc(100vw - 2rem));
  max-height: min(30rem, calc(100vh - 4rem));
  box-sizing: border-box;
  padding: 0;
  border: 1px solid var(--dv-border);
  border-radius: 8px;
  background: var(--dv-surface);
  color: var(--dv-text);
}

.dbc-value-dialog::backdrop {
  background: rgba(13, 17, 23, 0.45);
}

.dbc-value-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--dv-divider);
}

.dbc-value-dialog-header h3 {
  margin: 0;
  overflow-wrap: anywhere;
  font-family: var(--dv-font-mono);
  font-size: 0.8125rem;
}

.dbc-value-dialog-body {
  max-height: calc(100vh - 10rem);
  padding: 0.375rem 0.75rem;
  overflow: auto;
}

.dbc-value-row {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.2rem 0;
  font-size: 0.75rem;
}

.dbc-value-row code {
  font-family: var(--dv-font-mono);
}

.dbc-value-row span {
  overflow-wrap: anywhere;
  color: var(--dv-text-secondary);
}

@media (max-width: 700px) {
  .dbc-value-dialog {
    width: calc(100vw - 1rem);
    max-height: calc(100vh - 3rem);
  }
}

.dbc-palette-option-comment {
  overflow: hidden;
  color: var(--dv-accent);
  font-size: 0.6875rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================================================
   Structured statement edit dialog.
   ============================================================ */
.dbc-edit-dialog {
  display: flex;
  flex-direction: column;
  width: min(40rem, calc(100vw - 2rem));
  max-height: min(36rem, calc(100vh - 4rem));
  box-sizing: border-box;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--dv-border);
  border-radius: 8px;
  background: var(--dv-surface);
  color: var(--dv-text);
  box-shadow: 0 18px 48px rgba(13, 17, 23, 0.32);
}

.dbc-edit-dialog::backdrop {
  background: rgba(13, 17, 23, 0.45);
}

.dbc-edit-body {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.dbc-edit-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--dv-divider);
}

.dbc-edit-header h3 {
  margin: 0;
  font-size: 0.8125rem;
}

.dbc-edit-content {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  min-height: 0;
  padding: 0.75rem;
  overflow: auto;
}

.dbc-edit-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  color: var(--dv-text-secondary);
  font-size: 0.71875rem;
}

.dbc-edit-field input,
.dbc-edit-field textarea,
.dbc-edit-entry input {
  box-sizing: border-box;
  width: 100%;
  border: 1px solid var(--dv-border);
  border-radius: 4px;
  padding: 0.35rem 0.45rem;
  background: var(--dv-sunken);
  color: var(--dv-text);
  font-family: var(--dv-font-mono);
  font-size: 0.75rem;
}

.dbc-edit-field textarea {
  resize: vertical;
}

.dbc-edit-meta {
  grid-template-columns: minmax(4.5rem, max-content) minmax(0, 1fr);
}

.dbc-edit-entries {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.dbc-edit-entry {
  display: grid;
  grid-template-columns: minmax(4rem, 1fr) minmax(0, 2fr) auto;
  gap: 0.25rem;
  align-items: center;
}

.dbc-edit-preview-block h4 {
  margin: 0 0 0.25rem;
  color: var(--dv-text-muted);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.dbc-edit-preview-block pre {
  margin: 0;
  padding: 0.45rem 0.55rem;
  overflow: auto;
  border: 1px solid var(--dv-divider);
  border-radius: 4px;
  background: var(--dv-sunken);
  color: var(--dv-text);
  font-family: var(--dv-font-mono);
  font-size: 0.71875rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.dbc-edit-actions {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.75rem;
  border-top: 1px solid var(--dv-divider);
}

.dbc-edit-spacer {
  flex: 1 1 auto;
}

.dbc-action.danger {
  border-color: var(--dv-danger);
  color: var(--dv-danger-text);
}

.dbc-action.danger:hover {
  background: var(--dv-danger-bg);
}

@media (max-width: 700px) {
  .dbc-edit-dialog {
    width: calc(100vw - 1rem);
    max-height: calc(100vh - 3rem);
  }
}

.dbc-property-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.dbc-comment-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dbc-editor-document-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.25rem;
}

@media (max-width: 700px) {
  .dbc-editor-toolbar {
    flex-wrap: wrap;
    height: auto;
    padding-block: 0.25rem;
  }

  .dbc-editor-file {
    flex-basis: 100%;
  }
}

/* ============================================================
   Local session persistence notice and controls.
   ============================================================ */
.dbc-persistence-banner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-bottom: 1px solid var(--dv-warning);
  background: var(--dv-warning-bg);
  color: var(--dv-warning-text);
  font-size: 0.75rem;
}

.dbc-persistence-banner.is-error {
  border-bottom-color: var(--dv-danger);
  background: var(--dv-danger-bg);
  color: var(--dv-danger-text);
}

.dbc-persistence-banner > span {
  flex: 1 1 auto;
  overflow-wrap: anywhere;
}

.dbc-persistence-banner .dbc-icon-button {
  width: 1.5rem;
  height: 1.5rem;
  flex: 0 0 auto;
  color: currentColor;
}

/* ============================================================
   Astrea Tree adapter for the DBC explorer.
   ============================================================ */
.dbc-tree-nodes {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 0 0.25rem 0.5rem;
}

.dbc-tree-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.dbc-tree .tree-node-control {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--dv-text-muted);
  cursor: pointer;
}

.dbc-tree .tree-node-control:hover {
  color: var(--dv-text);
}

.dbc-tree .tree-container {
  --ast-tree-font-size: 0.78125rem;
  --ast-tree-line-height: 1.4;
  --ast-tree-color-text: var(--dv-text);
  --ast-tree-node-height: 1.625rem;
  --ast-tree-color-hover: var(--dv-hover);
  --ast-tree-color-focus: var(--dv-selection);
  --ast-tree-color-active: var(--dv-selection);
  --ast-tree-color-border: var(--dv-border);
  --ast-tree-icon-size: 14px;
  --ast-tree-control-indent: 16px;

  min-width: 0;
}

.dbc-tree .tree-node {
  border-radius: 4px;
}

.dbc-tree .tree-node-content__main {
  gap: 0.375rem;
  min-height: 1.625rem;
  border-radius: 4px;
}

.dbc-tree .tree-node-text {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  min-width: 0;
}

.dbc-tree .tree-node-text.selected,
.dbc-tree .tree-node-text.focused {
  border-radius: 4px;
}

.dbc-tree .dbc-tree-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dbc-tree .dbc-tree-folder-node .dbc-tree-icon {
  color: var(--dv-text-muted);
}

.dbc-tree .tree-node.selected .dbc-tree-icon {
  color: var(--dv-accent);
}

.dbc-tree .dbc-tree-folder-node .dbc-tree-label {
  color: var(--dv-text-secondary);
  font-weight: 600;
}

.dbc-tree .dbc-tree-file-node .dbc-tree-label {
  font-weight: 400;
}

.dbc-tree .tree-node.selected .tree-node-content__main,
.dbc-tree .tree-node-content__main.selected {
  background: var(--dv-selection);
  box-shadow: inset 2px 0 0 var(--dv-accent);
}