.mind-map-studio {
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--bg-primary);
}

.mind-map-studio-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--bg-primary);
}

.surface-body:has(> .mind-map-studio) { overflow: hidden; }

.mind-map-header-title {
  min-width: 6rem;
  width: min(24rem, 100%);
  padding: 0.25rem 0.375rem;
  overflow: hidden;
  border: var(--app-border-width,1px) solid transparent;
  border-radius: calc(0.4375rem*var(--ls-r,1));
  outline: 0;
  background: transparent;
  color: var(--text-primary);
  font: 600 0.75rem/1.2 var(--font-body);
  text-overflow: ellipsis;
}

.mind-map-header-title:hover { background: var(--bg-hover); }

.mind-map-header-title:focus {
  border-color: var(--border);
  background: var(--bg-primary);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-accent) 18%, transparent);
}

.mind-map-header-actions {
  display: flex;
  align-items: center;
  gap: 0.1875rem;
}

/* Insert a structure: a header button and the house row menu it opens. */
.mind-map-structure-popover {
  display: flex;
  align-items: center;
}

.mind-map-structure-menu { min-width: 190px; }

.mind-map-header-button[aria-expanded="true"] {
  border-color: var(--border-light);
  background: var(--bg-hover);
  color: var(--text-primary);
}

.mind-map-header-title[hidden],
.mind-map-header-actions[hidden] { display: none; }

.mind-map-header-button {
  display: inline-flex;
  width: 1.75rem;
  min-height: 1.75rem;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: var(--app-border-width,1px) solid transparent;
  border-radius: calc(0.4375rem*var(--ls-r,1));
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font: 650 0.6875rem/1 var(--font-body);
}

.mind-map-header-button:hover {
  border-color: var(--border-light);
  background: var(--bg-hover);
  color: var(--text-primary);
}

.mind-map-header-button.is-primary {
  background: color-mix(in srgb, var(--color-accent) 11%, transparent);
  color: var(--color-accent-hover);
}

.mind-map-header-button[aria-pressed="true"] {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: #fff;
}

.mind-map-header-button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.mind-map-header-button .preview-icon {
  width: 0.875rem;
  height: 0.875rem;
  flex: 0 0 0.875rem;
}

html[data-mind-map-workspace] .ai-pane-identity { flex: 1 1 auto; }
html[data-mind-map-workspace] #surfaceTabs { display: none; }

@container (max-width: 570px) {
  .mind-map-header-title { width: 100%; }
}

@container (max-width: 400px) {
  html[data-mind-map-workspace] .ai-mode-label { display: none; }
}