/* =====================================================
   PhotoLite - Panel Styles
   Right-side panels: Layers, Adjustments, Filters
   ===================================================== */

/* Panels Container */
.panels-container {
  display: flex;
  flex-direction: column;
  width: var(--panel-width);
  background: var(--panel-bg);
  backdrop-filter: var(--glass-blur);
  border-left: var(--glass-border);
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: var(--spacing-sm);
}

/* Individual Panel */
.panel {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--panel-border);
}

.panel:last-child {
  border-bottom: none;
}

/* Panel Header */
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--panel-border);
  cursor: pointer;
  user-select: none;
}

.panel-header h3 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-primary);
}

.panel-actions {
  display: flex;
  gap: var(--spacing-xs);
}

/* Panel Content */
.panel-content {
  padding: var(--spacing-md);
  padding-right: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  max-height: 400px;
  overflow-y: auto;
  overflow-x: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.2s ease;
}

/* Custom scrollbar for panels */
.panel-content::-webkit-scrollbar {
  width: 6px;
}

.panel-content::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.1);
  border-radius: 3px;
}

.panel-content::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
}

.panel-content::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Collapsible Panel */
.panel.collapsible .panel-header {
  position: relative;
}

.panel.collapsible .panel-header::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--text-secondary);
  border-bottom: 2px solid var(--text-secondary);
  transform: rotate(-135deg);
  transition: transform 0.3s ease;
  margin-left: var(--spacing-sm);
}

.panel.collapsible.collapsed .panel-header::after {
  transform: rotate(45deg);
}

.panel.collapsible.collapsed .panel-content {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
  overflow: hidden;
}

/* Layers Panel */
.layers-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.layer-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.layer-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

.layer-item.active {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.layer-item.dragging {
  opacity: 0.5;
  transform: scale(0.98);
}

.layer-item.drag-over {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.layer-thumbnail {
  width: 40px;
  height: 40px;
  background: var(--canvas-pattern);
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;

  /* Checkerboard for transparency */
  background-image: linear-gradient(45deg, #333 25%, transparent 25%),
    linear-gradient(-45deg, #333 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #333 75%),
    linear-gradient(-45deg, transparent 75%, #333 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
}

.layer-thumbnail img,
.layer-thumbnail canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.layer-info {
  flex: 1;
  min-width: 0;
}

.layer-name {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-type {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.layer-visibility {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.layer-visibility:hover {
  background: var(--panel-hover);
}

.layer-visibility.hidden {
  color: var(--text-muted);
  opacity: 0.5;
}

.layer-visibility svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
}

/* Layer Lock Button */
.layer-lock {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  opacity: 0.5;
}

.layer-lock:hover {
  background: var(--panel-hover);
  opacity: 1;
}

.layer-lock.is-locked {
  color: var(--accent-warning, #f59e0b);
  opacity: 1;
}

.layer-lock svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
}

/* Locked layer item styling */
.layer-item.locked {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.3);
}

.layer-item.locked .layer-name {
  color: var(--text-secondary);
}

.layer-item.locked .layer-thumbnail {
  opacity: 0.7;
}

/* Layer Opacity Slider */
.layer-opacity {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
  margin-top: var(--spacing-sm);
}

.layer-opacity label {
  font-size: 0.7rem;
  color: var(--text-muted);
  min-width: 50px;
}

.layer-opacity input[type="range"] {
  flex: 1;
  height: 4px;
  appearance: none;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
}

.layer-opacity input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 12px;
  height: 12px;
  background: white;
  border-radius: 50%;
  cursor: pointer;
}

.layer-opacity span {
  font-size: 0.75rem;
  color: var(--text-secondary);
  min-width: 35px;
  text-align: right;
}

/* Adjustments Panel */
.adjustment-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
}

.adjustment-group label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  min-width: 70px;
}

.adjustment-slider {
  flex: 1;
  height: 4px;
  appearance: none;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.adjustment-slider::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  background: white;
  border-radius: 50%;
  cursor: pointer;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.adjustment-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

.adjustment-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
}

/* Slider track fill effect */
.adjustment-slider {
  background: linear-gradient(
    to right,
    white 0%,
    white var(--value, 50%),
    rgba(255, 255, 255, 0.1) var(--value, 50%),
    rgba(255, 255, 255, 0.1) 100%
  );
}

.adjustment-value {
  font-size: 0.75rem;
  color: var(--text-secondary);
  min-width: 32px;
  text-align: right;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

/* Filters Panel */
.filters-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

.filter-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--panel-border);
}

.filter-btn.active {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
}

.filter-preview {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
  background-size: 200% 200%;
  position: relative;
  overflow: hidden;
}

.filter-preview::before {
  content: "";
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

/* Filter preview effects */
.filter-preview.grayscale {
  filter: grayscale(100%);
}

.filter-preview.sepia {
  filter: sepia(100%);
}

.filter-preview.invert {
  filter: invert(100%);
}

.filter-preview.blur {
  filter: blur(2px);
}

.filter-preview.sharpen {
  filter: contrast(1.2) saturate(1.2);
}

.filter-preview.emboss {
  filter: contrast(1.5) brightness(0.9);
}

.filter-preview.vignette {
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.8);
}

.filter-btn span:last-child {
  font-size: 0.7rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Empty State */
.panel-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
  text-align: center;
}

.panel-empty svg {
  width: 32px;
  height: 32px;
  stroke: var(--text-muted);
  margin-bottom: var(--spacing-sm);
  opacity: 0.5;
}

.panel-empty p {
  font-size: 0.8rem;
}

/* Collapsible Panel Animation */
.panel.collapsed .panel-content {
  max-height: 0;
  padding: 0 var(--spacing-md);
  overflow: hidden;
}

.panel-header .collapse-icon {
  transition: transform var(--transition-fast);
}

.panel.collapsed .panel-header .collapse-icon {
  transform: rotate(-90deg);
}

/* Blend Mode Selector */
.blend-mode-select {
  width: 100%;
  padding: var(--spacing-sm);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.8rem;
  outline: none;
  cursor: pointer;
  margin-top: var(--spacing-sm);
}

.blend-mode-select:focus {
  border-color: rgba(255, 255, 255, 0.3);
}

/* Transform Controls */
.transform-controls {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
}

.transform-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.transform-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--panel-border);
}

.transform-btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.transform-btn span {
  font-size: 0.7rem;
  font-weight: 500;
}

/* Crop Aspect Ratio Buttons */
.aspect-ratio-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) 0;
}

.aspect-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.7rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.aspect-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--panel-border);
}

.aspect-btn.active {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  color: white;
}

/* History Panel */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.history-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.history-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

.history-item.current {
  background: rgba(255, 255, 255, 0.08);
}

.history-item.future {
  opacity: 0.4;
}

.history-item svg {
  width: 14px;
  height: 14px;
  stroke: var(--text-muted);
}

.history-item span {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.history-item.current span {
  color: var(--text-primary);
  font-weight: 500;
}

/* =====================================================
   Text Properties Panel
   ===================================================== */

#text-panel {
  border-left: 2px solid var(--accent-primary, #6366f1);
}

.text-property-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
  min-height: 32px;
}

.text-property-group label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  min-width: 65px;
  flex-shrink: 0;
}

/* Font Select */
.font-select {
  flex: 1;
  padding: 6px 10px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.8rem;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
}

.font-select:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.font-select:focus {
  border-color: var(--accent-primary, #6366f1);
}

/* Size Input Row */
.size-input-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex: 1;
}

.size-input-row input[type="range"] {
  flex: 1;
  height: 4px;
  appearance: none;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  cursor: pointer;
}

.size-input-row input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent-primary, #6366f1);
  border-radius: 50%;
  cursor: pointer;
}

.size-input {
  width: 50px;
  padding: 4px 6px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.8rem;
  text-align: center;
}

/* Style Toggles (Bold, Italic, Underline, Strikethrough) */
.style-toggles {
  display: flex;
  gap: 4px;
}

.style-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
}

.style-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.style-btn.active {
  background: var(--accent-primary, #6366f1);
  border-color: var(--accent-primary, #6366f1);
  color: white;
}

.style-btn.italic {
  font-style: italic;
}

.style-btn.underline {
  text-decoration: underline;
}

.style-btn.strikethrough {
  text-decoration: line-through;
}

/* Alignment Buttons */
.align-buttons {
  display: flex;
  gap: 4px;
}

.align-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

.align-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.align-btn.active {
  background: var(--accent-primary, #6366f1);
  border-color: var(--accent-primary, #6366f1);
  color: white;
}

.align-btn svg {
  width: 14px;
  height: 14px;
}

/* Stroke Row */
.stroke-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.stroke-width-input {
  width: 50px;
  padding: 4px 6px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.8rem;
  text-align: center;
}

/* Shadow Controls */
.shadow-controls {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.shadow-input {
  width: 40px;
  padding: 4px 4px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.75rem;
  text-align: center;
}

.shadow-input::placeholder {
  color: var(--text-muted);
  font-size: 0.65rem;
}

/* Slider Value Display */
.slider-value {
  font-size: 0.75rem;
  color: var(--text-secondary);
  min-width: 35px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Text panel sliders */
#text-panel input[type="range"] {
  flex: 1;
  height: 4px;
  appearance: none;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  cursor: pointer;
}

#text-panel input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent-primary, #6366f1);
  border-radius: 50%;
  cursor: pointer;
}

/* Color input styling for text panel */
#text-panel .color-input {
  width: 32px;
  height: 26px;
  padding: 2px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: transparent;
}