/* ==========================================================================
   UI Toolbox Panel Styling
   Floating, dockable, draggable, collapsible toolboxes within Experiment UI Windows
   Styled consistently with UIWindow and industry standard creative software (Photoshop, Blender)
   ========================================================================== */

.ui-toolbox-panel {
  position: absolute;
  z-index: 28;
  background: var(--panel-bg, rgba(22, 27, 34, 0.92));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--panel-border, rgba(48, 54, 61, 0.9));
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55), 0 2px 6px rgba(0, 0, 0, 0.35);
  color: var(--text-main, #c9d1d9);
  font-family: inherit;
  user-select: none;
  display: flex;
  flex-direction: column;
  min-width: 170px;
  max-width: 320px;
  max-height: calc(100% - 24px);
  overflow: hidden;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
  pointer-events: auto;
}

.ui-toolbox-panel:focus-within,
.ui-toolbox-panel.active {
  border-color: rgba(88, 166, 255, 0.55);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(88, 166, 255, 0.25);
  z-index: 30;
}

/* Toolbox Title Bar */
.ui-toolbox-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 8px;
  background: rgba(13, 17, 23, 0.75);
  border-bottom: 1px solid var(--panel-border, rgba(48, 54, 61, 0.8));
  cursor: grab;
  font-size: 0.73rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-main, #c9d1d9);
}

.ui-toolbox-titlebar:active {
  cursor: grabbing;
}

.ui-toolbox-title-group {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.ui-toolbox-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--value-color, #58a6ff);
}

.ui-toolbox-title {
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--text-main, #e6edf3);
}

.ui-toolbox-controls {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-left: 6px;
}

.ui-toolbox-btn {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-muted, #8b949e);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: all 0.12s ease;
}

.ui-toolbox-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.ui-toolbox-btn.close:hover {
  background: rgba(248, 81, 73, 0.85);
  color: #fff;
}

/* Collapsed / Folded state */
.ui-toolbox-panel.collapsed {
  height: auto !important;
  max-height: none;
}

.ui-toolbox-panel.collapsed .ui-toolbox-body {
  display: none !important;
}

/* Toolbox Body */
.ui-toolbox-body {
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
  overflow-x: hidden;
  font-size: 0.73rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(139, 148, 158, 0.3) transparent;
}

.ui-toolbox-body::-webkit-scrollbar {
  width: 4px;
}
.ui-toolbox-body::-webkit-scrollbar-thumb {
  background: rgba(139, 148, 158, 0.3);
  border-radius: 2px;
}

/* Tool Sections & Grids */
.ui-toolbox-section {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ui-toolbox-label {
  font-size: 0.67rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted, #8b949e);
  margin-bottom: 2px;
}

.ui-toolbox-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
}

.ui-toolbox-grid.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.ui-toolbox-grid.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* Tool Action Button */
.ui-tool-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 7px;
  background: rgba(33, 38, 45, 0.8);
  border: 1px solid var(--panel-border, rgba(48, 54, 61, 0.7));
  border-radius: 5px;
  color: var(--text-main, #c9d1d9);
  font-size: 0.71rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.12s ease;
  white-space: nowrap;
}

.ui-tool-btn:hover {
  background: rgba(48, 54, 61, 0.9);
  color: #fff;
  border-color: rgba(139, 148, 158, 0.5);
}

.ui-tool-btn.active {
  background: rgba(88, 166, 255, 0.18);
  border-color: var(--value-color, #58a6ff);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 0 8px rgba(88, 166, 255, 0.25);
}

.ui-tool-icon {
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
}

.ui-tool-shortcut {
  margin-left: auto;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--text-muted, #8b949e);
  background: rgba(0, 0, 0, 0.35);
  padding: 1px 4px;
  border-radius: 3px;
}

/* Compact Tool Row */
.ui-toolbox-row {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Brush Size Selector */
.ui-brush-sizes {
  display: flex;
  gap: 3px;
  width: 100%;
}

.ui-brush-size-btn {
  flex: 1;
  padding: 3px 0;
  text-align: center;
  font-size: 0.67rem;
  background: rgba(33, 38, 45, 0.7);
  border: 1px solid var(--panel-border, rgba(48, 54, 61, 0.7));
  border-radius: 4px;
  color: var(--text-muted, #8b949e);
  cursor: pointer;
  transition: all 0.12s ease;
}

.ui-brush-size-btn:hover {
  background: rgba(48, 54, 61, 0.9);
  color: #fff;
}

.ui-brush-size-btn.active {
  background: var(--value-color, #58a6ff);
  border-color: var(--value-color, #58a6ff);
  color: #0d1117;
  font-weight: 700;
}

/* Stamp Presets List */
.ui-stamp-category-select {
  width: 100%;
  padding: 4px 6px;
  font-size: 0.7rem;
  background: rgba(13, 17, 23, 0.8);
  border: 1px solid var(--panel-border, rgba(48, 54, 61, 0.8));
  border-radius: 4px;
  color: var(--text-main, #c9d1d9);
}

.ui-stamp-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 180px;
  overflow-y: auto;
  padding-right: 2px;
}

.ui-stamp-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 6px;
  background: rgba(33, 38, 45, 0.6);
  border: 1px solid var(--panel-border, rgba(48, 54, 61, 0.6));
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.12s ease;
  font-size: 0.7rem;
}

.ui-stamp-item:hover {
  background: rgba(48, 54, 61, 0.85);
  color: #fff;
  border-color: rgba(139, 148, 158, 0.5);
}

.ui-stamp-item.active {
  background: rgba(88, 166, 255, 0.2);
  border-color: var(--value-color, #58a6ff);
  color: #fff;
  font-weight: 600;
}

.ui-stamp-dim {
  font-size: 0.63rem;
  color: var(--text-muted, #8b949e);
  background: rgba(0, 0, 0, 0.35);
  padding: 1px 4px;
  border-radius: 3px;
}

/* Stamp Orientation Controls */
.ui-stamp-transforms {
  display: flex;
  gap: 4px;
}

.ui-stamp-transform-btn {
  flex: 1;
  padding: 4px 2px;
  font-size: 0.68rem;
  background: rgba(33, 38, 45, 0.8);
  border: 1px solid var(--panel-border, rgba(48, 54, 61, 0.7));
  border-radius: 4px;
  color: var(--text-main, #c9d1d9);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  transition: all 0.12s ease;
}

.ui-stamp-transform-btn:hover {
  background: rgba(48, 54, 61, 0.95);
  color: #fff;
}

/* Snap Guide within Viewport */
.ui-toolbox-snap-guide {
  position: absolute;
  pointer-events: none;
  background: rgba(88, 166, 255, 0.45);
  z-index: 26;
  opacity: 0;
  transition: opacity 0.12s ease;
}

.ui-toolbox-snap-guide.visible {
  opacity: 1;
}

.ui-toolbox-snap-guide.vertical {
  top: 0;
  bottom: 0;
  width: 2px;
}

.ui-toolbox-snap-guide.horizontal {
  left: 0;
  right: 0;
  height: 2px;
}