/* =============================================
   Design Mode – Property Panel, Palette, Overlays
   ============================================= */

/* Toggle button active state */
#toggle-design-mode.active {
  background: var(--accent);
  color: #fff;
}

/* ── Property Panel (right side) ── */
.design-property-panel {
  position: absolute;
  top: 36px; /* below toolbar */
  right: 0;
  width: 240px;
  bottom: 0;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 20;
  overflow: hidden;
  font-size: 12px;
}

.design-property-panel.hidden {
  display: none;
}

.design-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-tertiary, var(--bg-secondary));
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 13px;
  flex-shrink: 0;
}

.design-panel-header button {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 16px;
  padding: 0 4px;
}

.design-panel-header button:hover {
  color: var(--text-primary);
}

.design-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.design-panel-empty {
  color: var(--text-secondary);
  text-align: center;
  padding: 24px 12px;
  font-style: italic;
}

/* Property sections */
.design-section {
  margin-bottom: 12px;
}

.design-section-title {
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  padding: 4px 0;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
}

.design-prop-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
}

.design-prop-label {
  width: 70px;
  flex-shrink: 0;
  color: var(--text-secondary);
  font-size: 11px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

.design-prop-input {
  flex: 1;
  min-width: 0;
  padding: 3px 6px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 11px;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.design-prop-input:focus {
  border-color: var(--accent);
  outline: none;
}

.design-prop-input[type="color"] {
  padding: 1px 3px;
  height: 24px;
  cursor: pointer;
}

.design-prop-select {
  flex: 1;
  min-width: 0;
  padding: 3px 4px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 11px;
}

/* Box model visual (margin/padding) */
.design-box-model {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: auto auto auto;
  gap: 2px;
  align-items: center;
  justify-items: center;
}

.design-box-model input {
  width: 40px;
  text-align: center;
  padding: 2px;
  border: 1px solid var(--border-color);
  border-radius: 2px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 10px;
}

.design-box-model input:focus {
  border-color: var(--accent);
  outline: none;
}

.design-box-center {
  grid-column: 2;
  font-size: 10px;
  color: var(--text-secondary);
}

/* Element info bar */
.design-element-info {
  padding: 6px 8px;
  background: var(--bg-tertiary, var(--bg-primary));
  border-bottom: 1px solid var(--border-color);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 11px;
  color: var(--accent);
  flex-shrink: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Palette Panel (left side) ── */
.design-palette {
  position: absolute;
  top: 36px; /* below toolbar */
  left: 0;
  width: 180px;
  bottom: 0;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 20;
  overflow: hidden;
  font-size: 12px;
}

.design-palette.hidden {
  display: none;
}

.design-palette-header {
  padding: 8px 12px;
  font-weight: 600;
  font-size: 13px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.design-palette-search {
  padding: 6px 8px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.design-palette-search input {
  width: 100%;
  padding: 4px 8px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 11px;
}

.design-palette-items {
  flex: 1;
  overflow-y: auto;
  padding: 6px;
}

.design-palette-category {
  margin-bottom: 8px;
}

.design-palette-category-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  padding: 4px 6px;
}

.design-palette-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  cursor: grab;
  transition: background 0.15s;
  user-select: none;
}

.design-palette-item:hover {
  background: var(--bg-primary);
}

.design-palette-item:active {
  cursor: grabbing;
  background: var(--accent-muted, rgba(59,130,246,.15));
}

.design-palette-item-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  font-size: 12px;
  flex-shrink: 0;
}

.design-palette-item-label {
  font-size: 11px;
  color: var(--text-primary);
}

/* ── Overlay indicator (shown on preview pane when design mode is active) ── */
.design-mode-indicator {
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  padding: 2px 10px;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  border-radius: 0 0 6px 6px;
  z-index: 25;
  pointer-events: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Preview pane adjustments in design mode ── */
.ide-preview-pane {
  position: relative;
}

/* Drop zone highlight (used by palette drag-and-drop in iframe) */
.design-drop-zone {
  outline: 2px dashed var(--accent) !important;
  outline-offset: -2px;
}