/* ==========================================================
   CanvasCraft Studio — Pro Modern Design System (Edge-to-Edge Fullscreen Canvas)
   ========================================================== */

:root {
  --bg-app: #090a0f;
  --bg-panel: rgba(18, 20, 29, 0.92);
  --bg-surface: #151824;
  --bg-surface-hover: #1e2235;
  --bg-elevated: #23273c;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.4);

  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-glow: 0 0 20px rgba(99, 102, 241, 0.4);
  --accent-pink: #ec4899;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);

  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.6);

  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-app);
  color: var(--text-main);
  height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}

/* ==========================================================
   1. Application Top Header
   ========================================================== */
.app-header {
  height: 56px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 50;
  flex-shrink: 0;
}

.header-left, .header-center, .header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.logo-badge {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #6366f1, #ec4899);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.95rem;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.5);
}

.brand-info {
  display: flex;
  align-items: center;
  gap: 5px;
}

.brand-name {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.4px;
  background: linear-gradient(90deg, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-tag {
  font-size: 0.65rem;
  font-weight: 700;
  background: rgba(99, 102, 241, 0.2);
  color: #818cf8;
  padding: 1px 5px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.header-separator {
  width: 1px;
  height: 20px;
  background: var(--border-color);
  margin: 0 3px;
}

.icon-btn {
  width: 35px;
  height: 35px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.88rem;
  transition: all 0.15s ease;
}

.icon-btn:hover:not(:disabled) {
  background: var(--bg-surface-hover);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
}

.icon-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.icon-btn.danger:hover {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: var(--danger);
}

.icon-btn.active-panel-toggle {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--accent);
  color: #fff;
}

.quick-history {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Center Zoom & Toggles */
.zoom-pill {
  display: flex;
  align-items: center;
  gap: 3px;
  background: var(--bg-surface);
  padding: 3px 6px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

.zoom-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.zoom-btn:hover {
  background: var(--bg-surface-hover);
  color: #fff;
}

#zoomLevel {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  min-width: 44px;
  text-align: center;
  color: var(--accent-cyan);
}

.mode-toggles {
  display: flex;
  gap: 5px;
}

.toggle-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.toggle-pill:hover {
  background: var(--bg-surface-hover);
  color: #fff;
}

.toggle-pill.active {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.3);
}

/* Right Dropdowns & Actions */
.bg-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.bg-selector select {
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 500;
  outline: none;
  cursor: pointer;
}

.bg-selector select option {
  background: var(--bg-surface);
  color: #fff;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border: none;
}

.secondary-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.secondary-btn:hover {
  background: var(--bg-surface-hover);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.primary-btn {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.primary-btn:hover {
  background: linear-gradient(135deg, #4f46e5, #4338ca);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
  transform: translateY(-1px);
}

.caret-icon {
  font-size: 0.68rem;
  margin-left: 2px;
}

/* Export Menu Dropdown */
.dropdown-wrapper {
  position: relative;
}

.menu-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  width: 220px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 100;
}

.dropdown-wrapper.open .menu-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.menu-dropdown button {
  background: transparent;
  border: none;
  color: var(--text-main);
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s ease;
}

.menu-dropdown button:hover {
  background: var(--bg-surface-hover);
}

.menu-dropdown button i {
  font-size: 1rem;
  color: var(--accent-cyan);
}

.menu-dropdown button strong {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
}

.menu-dropdown button small {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ==========================================================
   2. Fullscreen Edge-to-Edge Workspace
   ========================================================== */
.app-workspace {
  flex: 1;
  width: 100%;
  height: calc(100vh - 56px);
  display: flex;
  position: relative;
  overflow: hidden;
}

/* Left Tool Dock with Smooth Slide Collapse */
.tool-dock {
  width: 66px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0 16px;
  gap: 8px;
  backdrop-filter: blur(16px);
  z-index: 30;
  overflow-y: auto;
  flex-shrink: 0;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), width 0.28s cubic-bezier(0.16, 1, 0.3, 1), margin 0.28s ease;
}

.tool-dock.collapsed {
  transform: translateX(-100%);
  width: 0;
  padding: 0;
  margin-left: -1px;
  pointer-events: none;
}

.dock-collapse-header {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-bottom: 2px;
}

.dock-collapse-btn {
  background: var(--bg-surface-hover);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 28px;
  height: 24px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.72rem;
  transition: all 0.15s ease;
}

.dock-collapse-btn:hover {
  color: #fff;
  background: var(--accent);
}

.tool-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 100%;
}

.group-label {
  font-size: 0.6rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-subtle);
  letter-spacing: 0.6px;
  margin-bottom: 2px;
}

.dock-separator {
  width: 30px;
  height: 1px;
  background: var(--border-color);
  margin: 3px 0;
}

.tool-item {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.2s ease;
  position: relative;
}

.tool-item:hover {
  background: var(--bg-surface-hover);
  color: #fff;
  transform: scale(1.06);
}

.tool-item.active {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(236, 72, 153, 0.25));
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 14px rgba(99, 102, 241, 0.4);
}

/* Tool Tooltip */
.tool-item::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 12px);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.74rem;
  font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-6px);
  transition: all 0.2s ease;
  pointer-events: none;
  box-shadow: var(--shadow-md);
  z-index: 100;
}

.tool-item:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

/* Edge Handles to Pop Open Hidden Panels */
.edge-tab {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 24px;
  height: 48px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  z-index: 45;
  box-shadow: var(--shadow-md);
  transition: all 0.2s ease;
}

.edge-tab:hover {
  background: var(--accent);
  color: #fff;
  width: 28px;
}

.edge-tab.left-edge {
  left: 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  border-left: none;
}

.edge-tab.right-edge {
  right: 0;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  border-right: none;
}

.edge-tab.visible {
  display: flex;
}

/* ==========================================================
   3. Edge-to-Edge Fullscreen Canvas Stage
   ========================================================== */
.canvas-stage {
  flex: 1;
  width: 100%;
  height: 100%;
  position: relative;
  background: #0f1117;
  overflow: hidden;
  display: block;
  cursor: crosshair;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.canvas-board {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  user-select: none;
}

.canvas-board canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  user-select: none;
}

#gridCanvas {
  z-index: 1;
  pointer-events: none;
}

#paintCanvas {
  z-index: 2;
  background-color: #0f1117;
}

#previewCanvas {
  z-index: 3;
  pointer-events: none;
}

#cursorCanvas {
  z-index: 4;
  pointer-events: none;
}

/* Floating Inline Canvas Text Input */
.inline-canvas-text {
  position: absolute;
  z-index: 25;
  background: rgba(15, 17, 23, 0.75);
  border: 1.5px dashed var(--accent);
  border-radius: 4px;
  outline: none;
  padding: 4px 8px;
  min-width: 140px;
  min-height: 38px;
  color: #ffffff;
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  font-weight: 600;
  resize: both;
  overflow: hidden;
  line-height: 1.25;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
  backdrop-filter: blur(8px);
  white-space: pre-wrap;
  caret-color: var(--accent-cyan);
}

.inline-canvas-text:focus {
  border-color: var(--accent-cyan);
}

/* Symmetry Line */
.symmetry-guide {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--accent-pink),
    var(--accent-pink) 6px,
    transparent 6px,
    transparent 12px
  );
  pointer-events: none;
  z-index: 20;
  display: none;
}

.symmetry-guide.active {
  display: block;
}

/* ==========================================================
   4. Right Properties Panel with Slide Collapse
   ========================================================== */
.properties-panel {
  width: 280px;
  background: var(--bg-panel);
  border-left: 1px solid var(--border-color);
  backdrop-filter: blur(16px);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
  z-index: 30;
  flex-shrink: 0;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), width 0.28s cubic-bezier(0.16, 1, 0.3, 1), margin 0.28s ease, padding 0.28s ease;
}

.properties-panel.collapsed {
  transform: translateX(100%);
  width: 0;
  padding: 0;
  margin-right: -1px;
  pointer-events: none;
}

.panel-collapse-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 2px;
}

.panel-main-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.2px;
}

.panel-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.head-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.2px;
}

.preview-ring {
  width: 30px;
  height: 30px;
  background: var(--bg-surface-hover);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
}

#brushDotPreview {
  width: 8px;
  height: 8px;
  background: #6366f1;
  border-radius: 50%;
  transition: all 0.15s ease;
}

.field-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.76rem;
  color: var(--text-muted);
}

.value-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: var(--bg-surface-hover);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  color: var(--accent-cyan);
  font-weight: 600;
}

/* Glow Slider */
.glow-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: var(--bg-surface-hover);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
}

.glow-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.6);
  transition: transform 0.15s ease;
}

.glow-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Preset Pills */
.preset-pills {
  display: flex;
  gap: 4px;
  margin-top: 4px;
}

.pill-btn {
  flex: 1;
  padding: 4px 0;
  background: var(--bg-surface-hover);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  border-radius: var(--radius-xs);
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.pill-btn:hover, .pill-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Toggle Checkbox */
.toggle-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--text-muted);
  cursor: pointer;
}

.toggle-checkbox input {
  cursor: pointer;
  accent-color: var(--accent);
}

/* Stamp Selector */
.stamp-selector {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
}

.stamp-choice {
  font-size: 1.2rem;
  background: var(--bg-surface-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 5px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.stamp-choice:hover, .stamp-choice.active {
  background: rgba(99, 102, 241, 0.25);
  border-color: var(--accent);
  transform: scale(1.1);
}

/* Color Palette Card */
.active-color-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: #6366f1;
  border: 2px solid #fff;
  box-shadow: var(--shadow-sm);
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

#nativeColorPicker {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.custom-picker-btn {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface-hover);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 0.74rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.custom-picker-btn:hover {
  border-color: var(--accent);
  color: #fff;
}

.hex-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.swatch-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
}

.swatch-btn {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  background-color: var(--c);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.swatch-btn:hover {
  transform: scale(1.12);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.swatch-btn.active {
  border-color: #ffffff;
  transform: scale(1.15);
  box-shadow: 0 0 12px var(--c);
}

/* Shortcuts */
.shortcuts-section {
  margin-top: auto;
}

.shortcut-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.shortcut-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

kbd {
  background: var(--bg-surface-hover);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 2px 5px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: #fff;
}

/* ==========================================================
   5. Floating Quick Bar (Bottom Center)
   ========================================================== */
.floating-quick-bar {
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  z-index: 40;
  transition: all 0.25s ease;
}

.quick-tools {
  display: flex;
  align-items: center;
  gap: 5px;
}

.quick-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  transition: all 0.15s ease;
}

.quick-btn:hover {
  background: var(--bg-surface-hover);
  color: #fff;
  transform: translateY(-2px);
}

.quick-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

.bar-separator {
  width: 1px;
  height: 20px;
  background: var(--border-color);
}

.quick-colors {
  display: flex;
  align-items: center;
  gap: 7px;
}

.bottom-custom-color-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

#bottomColorPicker {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.color-wheel-btn {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    #ff0000, #ff8000, #ffff00, #00ff00,
    #00ffff, #0000ff, #8000ff, #ff0080, #ff0000
  );
  border: 2px solid rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.72rem;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.2);
  transition: all 0.2s ease;
}

.color-wheel-btn:hover {
  transform: scale(1.2) rotate(45deg);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.5);
}

.quick-dot {
  width: 19px;
  height: 19px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s ease;
}

.quick-dot:hover {
  transform: scale(1.2);
}

.quick-dot.active {
  border-color: #fff;
  transform: scale(1.25);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* ==========================================================
   6. Modal & Toast Notifications
   ========================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
  width: 380px;
  max-width: 90vw;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

.modal-body input[type="text"] {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-surface-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.95rem;
  outline: none;
}

.modal-body input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.3);
}

.modal-row select {
  background: var(--bg-surface-hover);
  color: #fff;
  border: 1px solid var(--border-color);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 0.85rem;
  margin-top: 8px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Toast */
.toast-popup {
  position: fixed;
  bottom: 84px;
  left: 50%;
  transform: translateX(-50%) translateY(50px);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  font-size: 0.82rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 300;
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.toast-popup.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.hidden {
  display: none !important;
}

/* ==========================================================
   10. Layers Panel & Tab Navigation System
   ========================================================== */
.panel-header-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 3px;
  margin-bottom: 2px;
}

.panel-tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.panel-tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
}

.panel-tab-btn.active {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.35);
}

.panel-tab-badge {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-full);
}

.panel-tab-btn.active .panel-tab-badge {
  background: rgba(255, 255, 255, 0.3);
}

.panel-tab-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

/* Layers Control Bar (Blend Mode & Opacity) */
.layer-control-bar {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.layer-field-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.layer-blend-wrapper {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.layer-select {
  background: var(--bg-surface-hover);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: var(--radius-xs);
  outline: none;
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.layer-select:focus {
  border-color: var(--accent);
}

.layer-opacity-wrapper {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.opacity-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.layer-val-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.layer-slider {
  margin-top: 2px;
}

/* Layers Stack List */
.layers-stack {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: calc(100vh - 360px);
  min-height: 180px;
  overflow-y: auto;
}

.layers-stack::-webkit-scrollbar {
  width: 5px;
}

.layers-stack::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

/* Individual Layer Card */
.layer-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  transition: all 0.15s ease;
  position: relative;
}

.layer-card:hover {
  background: var(--bg-surface-hover);
  border-color: rgba(255, 255, 255, 0.16);
}

.layer-card.active {
  background: rgba(99, 102, 241, 0.16);
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.layer-card.locked {
  opacity: 0.75;
}

.layer-card.hidden-layer {
  opacity: 0.45;
}

.layer-card.dragging {
  opacity: 0.35;
  border: 1px dashed var(--accent);
}

.layer-card.drag-over {
  border-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  transform: translateY(-2px);
}

.layer-drag-handle {
  color: var(--text-subtle);
  font-size: 0.72rem;
  cursor: grab;
  padding: 2px;
  display: flex;
  align-items: center;
}

.layer-drag-handle:active {
  cursor: grabbing;
}

.layer-toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 24px;
  height: 24px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.78rem;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.layer-toggle-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.text-accent {
  color: var(--accent-pink) !important;
}

/* Layer Thumbnail Preview */
.layer-thumb-preview {
  width: 44px;
  height: 32px;
  background: #111420;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xs);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.layer-thumb-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Layer Name & Inline Rename */
.layer-name-wrap {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.layer-name-text {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-card.active .layer-name-text {
  color: #fff;
}

.layer-rename-input {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--accent-cyan);
  border-radius: 4px;
  color: #fff;
  font-family: var(--font-main);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 2px 6px;
  outline: none;
}

/* Layers Footer Action Toolbar */
.layers-footer {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 6px;
}

.layer-footer-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-family: var(--font-main);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 7px 4px;
  border-radius: var(--radius-xs);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.layer-footer-btn i {
  font-size: 0.82rem;
}

.layer-footer-btn:hover:not(:disabled) {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.layer-footer-btn.danger-hover:hover:not(:disabled) {
  color: #fff;
  background: var(--danger);
  border-color: var(--danger);
}

.layer-footer-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Autosave Status Badge */
.save-status-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.2s ease;
  user-select: none;
}

.save-status-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
}

.save-status-badge.saved {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.25);
}
.save-status-badge.saved::before {
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.save-status-badge.saving {
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.25);
}
.save-status-badge.saving::before {
  background: var(--accent-cyan);
  animation: pulse-dot 1s infinite;
}

.save-status-badge.editing {
  background: rgba(234, 179, 8, 0.12);
  color: #eab308;
  border: 1px solid rgba(234, 179, 8, 0.25);
}
.save-status-badge.editing::before {
  background: #eab308;
}

.save-status-badge.error {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger);
}
.save-status-badge.error::before {
  background: var(--danger);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* Drag Reorder Indicators */
.layer-card.drag-over-top {
  border-top: 2px solid var(--accent-cyan) !important;
}

.layer-card.drag-over-bottom {
  border-bottom: 2px solid var(--accent-cyan) !important;
}