/* ==========================================================================
   BoxShadow Studio - Modern CSS Box Shadow Generator
   Author: Open Source Community
   License: MIT
   ========================================================================== */

:root {
  /* Color Palette - Dark Theme Default */
  --bg-primary: #0b0f17;
  --bg-secondary: #111827;
  --bg-tertiary: #1a2234;
  --bg-card: rgba(26, 34, 52, 0.7);
  --bg-card-hover: rgba(33, 44, 67, 0.85);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-focus: #6366f1;
  --border-color-hover: rgba(255, 255, 255, 0.16);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --accent-glow: rgba(99, 102, 241, 0.25);

  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.35);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, Monaco, monospace;

  --header-height: 64px;
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;

  --border-color: #cbd5e1;
  --border-color-focus: #6366f1;
  --border-color-hover: #94a3b8;

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;

  --accent-glow: rgba(99, 102, 241, 0.15);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 20px -5px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
}

/* Light Mode Contrast Overhaul: Ensure All Inputs, Sliders, and Controls Pop */
[data-theme="light"] .num-input,
[data-theme="light"] .hex-input {
  background-color: #ffffff;
  border: 1.5px solid #cbd5e1;
  color: #0f172a !important;
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .num-input:focus,
[data-theme="light"] .hex-input:focus {
  border-color: #4f46e5;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

[data-theme="light"] .range-slider {
  background: #cbd5e1 !important;
}

[data-theme="light"] .range-slider::-webkit-slider-thumb {
  background: #ffffff;
  border: 3.5px solid #4f46e5;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
}

[data-theme="light"] .range-slider::-moz-range-thumb {
  background: #ffffff;
  border: 3.5px solid #4f46e5;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
}

[data-theme="light"] .control-label,
[data-theme="light"] .switch-title {
  color: #0f172a;
  font-weight: 600;
}

[data-theme="light"] .switch-desc {
  color: #64748b;
}

[data-theme="light"] .switch-wrapper {
  background: #f8fafc;
  border: 1px solid #cbd5e1;
}

[data-theme="light"] .slider-switch {
  background-color: #cbd5e1;
}

[data-theme="light"] .joystick-container {
  background: #f8fafc;
  border: 1px solid #cbd5e1;
}

[data-theme="light"] .joystick-title {
  color: #334155;
  font-weight: 600;
}

[data-theme="light"] .joystick-pad {
  background: radial-gradient(circle at center, rgba(99, 102, 241, 0.08) 0%, #e2e8f0 100%);
  border: 1px solid #cbd5e1;
}

[data-theme="light"] .joystick-axes::before,
[data-theme="light"] .joystick-axes::after {
  background: rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .joystick-reticle {
  border-color: rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .btn {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #0f172a;
}

[data-theme="light"] .btn-ghost {
  background: transparent;
  border-color: transparent;
  color: #1e293b;
}

[data-theme="light"] .btn-ghost:hover {
  background: #f1f5f9;
}

[data-theme="light"] .layer-item {
  background: #ffffff;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .layer-item:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

[data-theme="light"] .layer-item.active {
  background: #eef2ff;
  border-color: #6366f1;
}

[data-theme="light"] .layer-name {
  color: #0f172a;
}

[data-theme="light"] .layer-summary {
  color: #64748b;
}

[data-theme="light"] .segmented-control {
  background: #e2e8f0;
  border: 1px solid #cbd5e1;
}

[data-theme="light"] .segmented-btn {
  color: #475569;
}

[data-theme="light"] .segmented-btn.active {
  background: #ffffff;
  color: #4338ca;
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .preset-chip {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #334155;
}

[data-theme="light"] .preset-chip.active {
  background: #6366f1;
  color: #ffffff;
  border-color: #6366f1;
}

[data-theme="light"] .preset-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .preset-card:hover {
  background: #f8fafc;
  border-color: #6366f1;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .preset-name {
  color: #0f172a;
}

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  min-height: 100vh;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: clip;
}

/* Scrollbar customization */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Header & Navigation */
.app-header {
  height: var(--header-height);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-container {
  max-width: 1720px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
  color: #ffffff;
}

.brand-info h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(99, 102, 241, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Responsive Header for Small Devices - Never cut off */
@media (max-width: 680px) {
  .app-header {
    height: 56px;
  }
  .header-container {
    padding: 0 12px;
    gap: 8px;
  }
  .brand {
    gap: 8px;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
  }
  .brand-info h1 {
    font-size: 0.95rem;
  }
  .brand-subtitle {
    display: none;
  }
  .header-actions {
    gap: 6px;
  }
  .header-actions .btn {
    padding: 6px 8px;
    height: 32px;
    font-size: 0.78rem;
  }
  .header-actions .btn .btn-label {
    display: none;
  }
  .btn-icon-only {
    width: 32px;
    height: 32px;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-color-hover);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--accent-gradient);
  border: 1px solid transparent;
  color: #ffffff;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4f46e5 0%, #9333ea 100%);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.45);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--bg-tertiary);
}

.btn-icon-only {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.78rem;
}

.btn-danger-ghost {
  color: var(--danger);
  background: transparent;
  border-color: transparent;
}
.btn-danger-ghost:hover {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.2);
}

/* Layout */
.app-main {
  max-width: 1720px;
  margin: 0 auto;
  padding: 16px 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 440px;
  gap: 20px;
  align-items: start;
  min-height: calc(100vh - var(--header-height));
}

@media (max-width: 1280px) {
  .app-main {
    grid-template-columns: minmax(0, 1fr) 400px;
    gap: 16px;
  }
}

@media (max-width: 1024px) {
  .app-main {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .sticky-preview-column {
    position: static !important;
    order: -1; /* Place sticky preview on top for mobile */
  }
}

/* Left Column: 1. Shadow Layers -> 2. Settings -> 3. Presets */
.left-workbench-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.settings-controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 16px;
}

@media (max-width: 680px) {
  .settings-controls-grid {
    grid-template-columns: 1fr;
  }
}

/* Right Column: Sticky Compact Live Preview & Code */
.sticky-preview-column {
  position: -webkit-sticky;
  position: sticky;
  top: calc(var(--header-height) + 12px);
  align-self: start;
  height: fit-content;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 30;
}

/* Sidebar & Control Panels */
.panel {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

.panel-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.panel-title {
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}

.panel-title svg {
  color: var(--accent-primary);
}

.panel-body {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Layers Manager */
.layers-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 260px;
  overflow-y: auto;
  padding-right: 4px;
}

.layer-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.layer-item:hover {
  border-color: var(--border-color-hover);
  background-color: var(--bg-card-hover);
}

.layer-item.active {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
  box-shadow: 0 0 0 1px var(--accent-primary);
}

.layer-item.disabled {
  opacity: 0.5;
}

.layer-info {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

/* Interactive Layer Color Dot & Inline Picker */
.layer-color-picker-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.layer-color-picker-badge:hover .layer-preview-dot {
  transform: scale(1.15);
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
}

.layer-preview-dot {
  width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(255, 255, 255, 0.6);
  flex-shrink: 0;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  display: block;
}

.layer-inline-color-input,
.chip-color-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  padding: 0;
  margin: 0;
  border: none;
}

.layer-labels {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.layer-name-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.layer-name {
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-color-badge {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 0 4px;
  background: var(--bg-primary);
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.layer-summary {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.layer-btn {
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all var(--transition-fast);
}

.layer-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.layer-btn.btn-delete:hover {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

/* 2D Light Source Joystick Controller */
.joystick-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--bg-tertiary);
  padding: 14px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

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

.joystick-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.joystick-coords {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-primary);
}

.joystick-pad {
  width: 100%;
  height: 120px;
  background: radial-gradient(circle at center, rgba(99, 102, 241, 0.08) 0%, rgba(0, 0, 0, 0.3) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  position: relative;
  cursor: crosshair;
  overflow: hidden;
  touch-action: none;
}

.joystick-axes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.joystick-axes::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.06);
}

.joystick-axes::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.06);
}

.joystick-reticle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 50px;
  height: 50px;
  transform: translate(-50%, -50%);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  pointer-events: none;
}

.joystick-handle {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-gradient);
  border: 2px solid #ffffff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.8);
  pointer-events: none;
  transition: transform 0.05s linear;
}

/* Form Controls & Sliders */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.control-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.control-input-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Custom Range Input */
.range-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  outline: none;
  transition: background var(--transition-fast);
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--accent-primary);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 10px var(--accent-primary);
}

.range-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--accent-primary);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-fast);
}

.num-input {
  width: 68px;
  height: 32px;
  padding: 4px 8px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-align: right;
  outline: none;
  transition: border-color var(--transition-fast);
}

.num-input:focus {
  border-color: var(--border-color-focus);
}

/* Color & Inset Controls */
.color-picker-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.color-input-wrapper {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  cursor: pointer;
  flex-shrink: 0;
}

.color-picker-input {
  position: absolute;
  top: -10px;
  left: -10px;
  width: 60px;
  height: 60px;
  border: none;
  cursor: pointer;
  background: none;
}

.hex-input {
  flex: 1;
  height: 36px;
  padding: 0 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  outline: none;
  text-transform: uppercase;
}

.hex-input:focus {
  border-color: var(--border-color-focus);
}

/* Multi-Layer Colors & Opacities Section in Settings Panel */
.multi-layer-colors-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--bg-secondary);
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

[data-theme="light"] .multi-layer-colors-card {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.color-actions-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.apply-all-color-btn {
  background: transparent;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

[data-theme="light"] .apply-all-color-btn {
  border-color: #94a3b8;
  color: #334155;
  background: #ffffff;
}

.apply-all-color-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
}

.all-layer-colors-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}

.layer-color-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

[data-theme="light"] .layer-color-row {
  background: #ffffff;
  border-color: #cbd5e1;
}

.layer-color-row:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.04);
}

.layer-color-row.active-layer-color {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
  box-shadow: 0 0 0 1.5px var(--accent-primary);
}

.layer-color-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 90px;
}

.layer-pill {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

[data-theme="light"] .layer-pill {
  background: #f1f5f9;
  border-color: #cbd5e1;
  color: #0f172a;
}

.layer-pill.pill-active {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

.layer-inset-badge {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--warning);
  text-transform: uppercase;
}

.layer-color-pickers {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 160px;
}

.layer-color-pickers .color-input-wrapper {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.layer-color-pickers .color-picker-input {
  position: absolute;
  top: -8px;
  left: -8px;
  width: 48px;
  height: 48px;
  border: none;
  cursor: pointer;
  background: none;
}

.layer-color-pickers .hex-input {
  width: 85px;
  height: 32px;
  padding: 0 8px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  text-transform: uppercase;
}

[data-theme="light"] .layer-color-pickers .hex-input {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #0f172a;
}

.layer-color-opacity-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 130px;
}

.layer-color-opacity-group .range-slider {
  flex: 1;
}

.layer-opacity-badge {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 36px;
  text-align: right;
}

[data-theme="light"] .layer-opacity-badge {
  color: #0f172a;
}

@media (max-width: 600px) {
  .layer-color-row {
    flex-wrap: wrap;
    gap: 8px;
  }
  .layer-color-pickers {
    max-width: none;
  }
  .layer-color-opacity-group {
    width: 100%;
  }
}

/* Switch / Toggle */
.switch-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.switch-label {
  display: flex;
  flex-direction: column;
}

.switch-title {
  font-size: 0.85rem;
  font-weight: 500;
}

.switch-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider-switch {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: rgba(255, 255, 255, 0.1);
  transition: 0.25s;
  border-radius: 24px;
}

.slider-switch::before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.25s;
  border-radius: 50%;
}

input:checked + .slider-switch {
  background-color: var(--accent-primary);
}

input:checked + .slider-switch::before {
  transform: translateX(20px);
}

/* Center Stage: Interactive Live Preview */
.preview-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 10px 18px;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.segmented-control {
  display: inline-flex;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 3px;
  border: 1px solid var(--border-color);
}

.segmented-btn {
  padding: 5px 12px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.segmented-btn.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.color-dot-btn {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast);
  padding: 0;
}

.color-dot-btn:hover {
  transform: scale(1.15);
}

.color-dot-btn.active {
  border-color: var(--accent-primary);
  box-shadow: 0 0 8px var(--accent-primary);
}

/* Canvas Viewport (Compact with reduced outer padding) */
.canvas-viewport {
  width: 100%;
  height: 165px;
  min-height: 155px;
  max-height: 175px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  transition: background var(--transition-normal);
  background-color: #ffffff;
  background-image: radial-gradient(rgba(0, 0, 0, 0.07) 1.5px, transparent 1.5px);
  background-size: 18px 18px;
}

/* Background Patterns */
.canvas-viewport.bg-dots {
  background-color: #0d121d;
  background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1.5px, transparent 1.5px);
  background-size: 20px 20px;
}

.canvas-viewport.bg-grid {
  background-color: #0d121d;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
}

.canvas-viewport.bg-checker {
  background-color: #0d121d;
  background-image: linear-gradient(45deg, #182234 25%, transparent 25%),
                    linear-gradient(-45deg, #182234 25%, transparent 25%),
                    linear-gradient(45deg, transparent 75%, #182234 75%),
                    linear-gradient(-45deg, transparent 75%, #182234 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

.canvas-viewport.bg-mesh {
  background: radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.25) 0px, transparent 50%),
              radial-gradient(at 100% 0%, rgba(168, 85, 247, 0.2) 0px, transparent 50%),
              radial-gradient(at 100% 100%, rgba(59, 130, 246, 0.25) 0px, transparent 50%),
              #0f172a;
}

.canvas-viewport.bg-white {
  background-color: #ffffff;
  background-image: radial-gradient(rgba(0, 0, 0, 0.07) 1.5px, transparent 1.5px);
  background-size: 18px 18px;
}

/* Target Element in Preview (Snug fit, minimal outer padding) */
.target-box {
  width: 220px;
  height: 110px;
  background-color: #ffffff;
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  text-align: center;
  user-select: none;
  transition: box-shadow 0.05s ease-out, transform 0.15s ease-out, border-radius var(--transition-fast), background-color var(--transition-fast);
  cursor: grab;
  position: relative;
}

.target-box:active {
  cursor: grabbing;
}

.target-box.is-tilting {
  transform-style: preserve-3d;
}

/* Dynamic High-Contrast Card Styles */
.target-box.is-light-box {
  color: #0f172a;
  border: 1px solid rgba(0, 0, 0, 0.08);
}
.target-box.is-light-box .box-title {
  color: #0f172a !important;
}
.target-box.is-light-box .box-desc {
  color: #64748b !important;
}
.target-box.is-light-box .box-pill-badge {
  background: rgba(99, 102, 241, 0.12) !important;
  color: #4f46e5 !important;
}

.target-box.is-dark-box {
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.target-box.is-dark-box .box-title {
  color: #ffffff !important;
}
.target-box.is-dark-box .box-desc {
  color: #94a3b8 !important;
}
.target-box.is-dark-box .box-pill-badge {
  background: rgba(99, 102, 241, 0.25) !important;
  color: #a5b4fc !important;
}

/* Inner elements for card preview mode */
.box-content-card {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
}

.box-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  display: grid;
  place-items: center;
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.3);
}

.box-title {
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.2;
}

.box-desc {
  font-size: 0.65rem;
}

.box-pill-badge {
  font-size: 0.6rem;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: var(--radius-full);
}

/* Box Customizer Floating Bar (Compact) */
.box-quick-tweaks {
  position: absolute;
  bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: rgba(17, 24, 39, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  z-index: 10;
  font-size: 0.72rem;
}

.tweak-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.tweak-item input[type="range"] {
  width: 55px;
}

/* Code Output Box */
.code-box-wrapper {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

.code-tabs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-tertiary);
  padding: 6px 12px;
  border-bottom: 1px solid var(--border-color);
}

.code-tabs {
  display: flex;
  gap: 4px;
}

.code-tab-btn {
  padding: 5px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.code-tab-btn.active {
  background: var(--bg-secondary);
  color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
}

.code-body {
  position: relative;
  padding: 12px 14px;
  background: #080c14;
  min-height: 110px;
  max-height: 150px;
  overflow-y: auto;
}

.code-snippet {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: #38bdf8;
  white-space: pre-wrap;
  word-break: break-all;
}

.code-snippet .css-prop {
  color: #f472b6;
}
.code-snippet .css-val {
  color: #34d399;
}
.code-snippet .css-inset {
  color: #fbbf24;
  font-weight: 600;
}

.code-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

/* Presets Showcase Section */
.presets-panel {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* Presets Live Search Bar */
.preset-search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  max-width: 360px;
  min-width: 220px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 0 12px;
  transition: all var(--transition-fast);
}

[data-theme="light"] .preset-search-wrapper {
  background: #ffffff;
  border-color: #cbd5e1;
}

.preset-search-wrapper:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.preset-search-wrapper svg {
  color: var(--text-muted);
  flex-shrink: 0;
  margin-right: 8px;
}

#presetSearchInput {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  padding: 6px 0;
  font-size: 0.82rem;
  color: var(--text-primary);
  font-family: inherit;
}

#presetSearchInput::placeholder {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.clear-search-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.15rem;
  line-height: 1;
  padding: 2px 4px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.clear-search-btn:hover {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.2);
}

/* Presets Empty State */
.presets-empty-state {
  grid-column: 1 / -1;
  padding: 48px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
}

.presets-empty-state svg {
  opacity: 0.45;
  color: var(--text-muted);
}

.presets-empty-state p {
  font-size: 0.9rem;
  margin: 0;
}

.presets-empty-state strong {
  color: var(--text-primary);
}

.presets-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

.preset-chip {
  padding: 5px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.preset-chip.active, .preset-chip:hover {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

/* Full open grid - No internal scrollbar, displays all presets clearly */
.presets-grid {
  padding: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  max-height: none;
  overflow: visible;
}

@media (max-width: 480px) {
  .presets-grid {
    grid-template-columns: 1fr;
  }
}

.preset-card {
  display: flex;
  flex-direction: column;
  padding: 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  gap: 10px;
}

.preset-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-primary);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
  background: var(--bg-card-hover);
}

.preset-card.active-preset {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-primary);
}

/* Dedicated preview stage to ensure shadow is crystal clear & visible */
.preset-preview-stage {
  width: 100%;
  height: 96px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  position: relative;
  overflow: visible;
  transition: background var(--transition-fast);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.preset-preview-stage.stage-light {
  background: #f1f5f9;
  border-color: rgba(0, 0, 0, 0.08);
}

.preset-preview-stage.stage-dark {
  background: #080c14;
  border-color: rgba(255, 255, 255, 0.08);
}

.preset-preview-stage.stage-neumorphic {
  background: #e2e8f0;
  border-color: #cbd5e1;
}

.preset-mini-box {
  width: 64px;
  height: 46px;
  border-radius: 8px;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
  position: relative;
  z-index: 2;
}

.preset-card:hover .preset-mini-box {
  transform: translateY(-3px) scale(1.05);
}

.preset-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.preset-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.preset-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.preset-layers-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.preset-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.preset-category-tag {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-weight: 500;
}

.preset-apply-hint {
  font-size: 0.68rem;
  color: var(--accent-primary);
  opacity: 0;
  transition: opacity var(--transition-fast);
  font-weight: 500;
}

.preset-card:hover .preset-apply-hint {
  opacity: 1;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: #111827;
  color: #ffffff;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg), 0 0 16px rgba(0, 0, 0, 0.4);
  font-size: 0.85rem;
  font-weight: 500;
  transform: translateY(20px);
  opacity: 0;
  animation: toastIn 0.25s forwards cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

.toast.toast-success svg {
  color: var(--success);
}

.toast.toast-info svg {
  color: var(--accent-primary);
}

@keyframes toastIn {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes toastOut {
  to {
    transform: translateY(10px);
    opacity: 0;
  }
}

/* Modal Dialog */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  place-items: center;
  padding: 20px;
}

.modal-backdrop.open {
  display: grid;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 580px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Footer / Attribution */
.app-footer {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.app-footer a {
  color: var(--accent-primary);
  text-decoration: none;
}

.app-footer a:hover {
  text-decoration: underline;
}