/* CSS Grid & Flexbox Layout Builder - Content Area Styles */
:root {
  --cgb-bg: #ffffff;
  --cgb-surface: #f8fafc;
  --cgb-card: #ffffff;
  --cgb-border: #e2e8f0;
  --cgb-line: #cbd5e1;
  --cgb-ink: #0f172a;
  --cgb-ink-soft: #475569;
  --cgb-ink-faint: #94a3b8;
  --cgb-primary: var(--tf-accent, #2563eb);
  --cgb-primary-hover: #1d4ed8;
  --cgb-radius: 2px;
}

.cgb-main {
  width: 100%;
  color: var(--cgb-ink);
}

.cgb-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Controls bar */
.cgb-controls-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 16px;
  background: var(--cgb-surface);
  border: 1px solid var(--cgb-line);
  border-radius: var(--cgb-radius);
}

.cgb-control-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cgb-control-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--cgb-ink-soft);
}

/* 2-column Grid */
.cgb-editor-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

@media (max-width: 860px) {
  .cgb-editor-grid {
    grid-template-columns: 1fr;
  }
}

/* Panels */
.cgb-panel {
  background: var(--cgb-card);
  border: 1px solid var(--cgb-line);
  border-radius: var(--cgb-radius);
  padding: 24px;
}

.cgb-form-panel,
.cgb-preview-panel {
  position: relative;
}

.cgb-panel-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 16px 0;
  color: var(--cgb-ink);
}

.cgb-ad {
  overflow: hidden;
  min-height: 280px;
}

/* Sliders */
.cgb-slider-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.cgb-slider-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  font-weight: 600;
}

.cgb-slider-label {
  color: var(--cgb-ink);
}

.cgb-slider-val {
  color: var(--cgb-primary);
  font-variant-numeric: tabular-nums;
}

.cgb-range {
  width: 100%;
  accent-color: var(--cgb-primary);
  cursor: pointer;
}

/* Form Fields */
.cgb-grid {
  display: grid;
  gap: 12px;
}

.cgb-grid-2 {
  grid-template-columns: 1fr 1fr;
}

.cgb-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cgb-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--cgb-ink);
}

.cgb-select {
  width: 100%;
  padding: 8px 12px;
  font-size: 0.875rem;
  color: var(--cgb-ink);
  background: var(--cgb-card);
  border: 1px solid var(--cgb-line);
  border-radius: var(--cgb-radius);
  font-family: inherit;
  box-sizing: border-box;
}

.cgb-select:focus {
  outline: 2px solid var(--cgb-primary);
  border-color: var(--cgb-primary);
}

/* Child Toolbar */
.cgb-child-toolbar {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--cgb-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.cgb-item-btns {
  display: flex;
  gap: 8px;
}

/* Buttons */
.cgb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--cgb-radius);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease;
  background: var(--cgb-primary);
  color: #ffffff;
}

.cgb-btn:hover {
  background: var(--cgb-primary-hover);
}

.cgb-btn-sm {
  padding: 6px 14px;
  font-size: 0.8125rem;
}

.cgb-btn-secondary {
  background: var(--cgb-surface);
  color: var(--cgb-ink);
  border-color: var(--cgb-line);
}

.cgb-btn-secondary:hover {
  background: var(--cgb-card);
  border-color: var(--cgb-ink);
}

/* Canvas Viewport */
.cgb-canvas-viewport {
  width: 100%;
  min-height: 320px;
  border-radius: var(--cgb-radius);
  border: 1px dashed var(--cgb-line);
  background: var(--cgb-surface);
  padding: 16px;
  box-sizing: border-box;
}

.cgb-live-container {
  width: 100%;
  min-height: 280px;
  box-sizing: border-box;
  transition: all 0.15s ease;
}

/* Child Items */
.cgb-box-item,
.item {
  background: #ffffff;
  border: 2px solid var(--cgb-primary);
  border-radius: var(--cgb-radius);
  color: var(--cgb-primary);
  font-weight: 700;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 70px;
  padding: 12px;
  box-sizing: border-box;
}

/* Code Snippet Box */
.cgb-code-box {
  margin-top: 20px;
  background: var(--cgb-surface);
  border: 1px solid var(--cgb-line);
  border-radius: var(--cgb-radius);
  overflow: hidden;
}

.cgb-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--cgb-line);
  background: var(--cgb-card);
}

.cgb-code-tabs {
  display: flex;
  gap: 6px;
}

.cgb-code-tab {
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--cgb-radius);
  color: var(--cgb-ink-soft);
  cursor: pointer;
}

.cgb-code-tab.is-active {
  background: var(--cgb-surface);
  border-color: var(--cgb-line);
  color: var(--cgb-ink);
}

.cgb-code-pre {
  margin: 0;
  padding: 14px;
  font-family: var(--tf-font-mono, ui-monospace, monospace);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--cgb-ink);
  overflow-x: auto;
  white-space: pre-wrap;
}

@media (max-width: 640px) {
  .cgb-controls-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .cgb-control-group {
    justify-content: space-between;
  }
}

/* tf:dark-palette — generated by migrate_chrome.py */
/* Neutrals inherit the shared chrome tokens so all tools share one
   ground; brand hues are kept and lightened, never inverted. */
[data-theme="dark"] {
  --cgb-bg: var(--tf-surface);
  --cgb-surface: var(--tf-surface);
  --cgb-card: var(--tf-surface);
  --cgb-border: var(--tf-surface);
  --cgb-line: #98abc3;
  --cgb-ink: var(--tf-ink);
  --cgb-ink-soft: var(--tf-ink-soft);
  --cgb-ink-faint: var(--tf-ink-faint);
  --cgb-primary-hover: #8198da;
}