:root {
  /* 1. Color System (Dark & Focused) */
  --bg-base: #101014;
  --bg-surface: #18181d;
  --bg-surface-hover: #212127;
  --bg-surface-active: #2a2a32;

  --border-subtle: #272730;
  --border-strong: #3f3f4e;

  --text-primary: #eeeef0;
  --text-secondary: #9090a0;
  --text-muted: #60606d;

  --accent-color: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.2);

  /* Original Theme Colors repurposed for metrics/alerts */
  --primary-color: var(--accent-color);
  --primary-dark: var(--accent-hover);
  --success-color: #10b981;
  --success-dark: #059669;
  --error-color: #ef4444;
  --error-dark: #dc2626;
  --warning-color: #f59e0b;
  --warning-dark: #d97706;

  /* 2. Typography Scale */
  --font-family: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  --font-size-h1: 1.5rem;
  --font-size-h2: 1.25rem;
  --font-size-h3: 0.875rem;
  --font-size-body: 1rem;
  --font-size-caption: 0.875rem;
  --font-size-small: 0.75rem;

  /* 3. Spacing Rhythm */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 0.75rem;
  --spacing-lg: 1rem;
  --spacing-xl: 1.5rem;

  /* 4. Surface Constraints */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 9999px;

  /* 5. Shadows & Elevations */
  --shadow-inset: inset 0 1px 0 0 rgba(255, 255, 255, 0.05);
  --shadow-float: 0 8px 30px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-subtle);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2), 0 0 0 1px var(--border-subtle);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3), 0 0 0 1px var(--border-subtle);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-subtle);

  /* 6. Interaction Timings */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 14px;
  height: 14px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: var(--border-strong);
  border-radius: var(--radius-pill);
  border: 4px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--text-muted);
}

body {
  font-family: var(--font-family);
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
  line-height: 1.4;
  color: var(--text-primary);
  background-color: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden; /* Prevent body scroll, layout handles it */
}

/* App Layout Grid */
.app-layout {
  display: grid;
  grid-template-columns: 280px 1fr 300px; /* Sidebar, Canvas, Tools */
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

@media (max-width: 992px) {
  .app-layout {
    grid-template-columns: 250px 1fr; /* Hide right sidebar on medium screens or move below? Wait, let's just make them stack */
    overflow-y: auto;
    height: auto;
    min-height: 100vh;
  }
}

@media (max-width: 768px) {
  body {
    overflow-y: auto; /* Allow body scroll on mobile */
  }
  .app-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    height: auto;
    overflow-y: visible;
  }
  .sidebar, .main-canvas, .tools-panel {
    height: auto;
    overflow-y: visible;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
}

.sidebar {
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
}

.main-canvas {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  background-color: var(--bg-base);
  position: relative;
}

.tools-panel {
  background-color: var(--bg-surface);
  border-left: 1px solid var(--border-subtle);
  height: 100%;
  overflow-y: auto;
  padding: var(--spacing-lg);
}

.brand-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.title {
  font-size: var(--font-size-h2);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.02em;
}

/* Utility classes to replace old container constraints */
.p-lg {
  padding: var(--spacing-lg);
}
.border-b {
  border-bottom: 1px solid var(--border-subtle);
}
.flex-col {
  display: flex;
  flex-direction: column;
}
.gap-md {
  gap: var(--spacing-md);
}


/* Color Input Section */
.color-input-section {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.input-group, .control-group, .color-presets, .tool-section, .color-history, .color-box, .color-input-section {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm), var(--shadow-inset);
  border: 1px solid var(--border-subtle);
}

.input-group {
  padding: var(--spacing-lg);
}

.color-formats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.format-inputs {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
}

.input-with-label {
  position: relative;
  flex: 1;
  min-width: 200px;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

input[type="color"] {
  width: 50px;
  height: 50px;
  padding: 0;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: none;
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

input[type="color"]::-webkit-color-swatch {
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
}

input[type="text"] {
  flex: 1;
  padding: var(--spacing-md);
  background: var(--bg-base);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: var(--font-size-body);
  font-family: var(--font-mono);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-inset);
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px var(--accent-glow), var(--shadow-inset);
}

.format-label {
  position: absolute;
  right: var(--spacing-md);
  color: var(--text-secondary);
  font-size: var(--font-size-caption);
  pointer-events: none;
}

/* Buttons */
.button {
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text-primary);
  background: var(--bg-surface-active);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-weight: 500;
  font-size: var(--font-size-body);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  min-width: max-content;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.button::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.1);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.button:hover::after {
  opacity: 1;
}

.button:active {
  transform: translateY(1px);
  box-shadow: var(--shadow-sm);
}

.button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.button--primary {
  background-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.button--primary:hover {
  background-color: var(--primary-dark);
}

.button--success {
  background-color: var(--success-color);
  box-shadow: var(--shadow-sm);
}

.button--success:hover {
  background-color: var(--success-dark);
}

/* Clear History Button */
#clearHistory.button {
  background: transparent;
  border: 2px solid var(--text-secondary);
  color: var(--text-secondary);
  padding: var(--spacing-sm) var(--spacing-md);
  min-width: auto;
  font-size: 0.875rem;
}

#clearHistory.button:hover {
  background-color: var(--text-secondary);
  color: white;
  border-color: transparent;
}

/* Scheme and Export Buttons */
.scheme-buttons,
.export-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

.scheme-buttons .button,
.export-buttons .button {
  flex: 1;
}

/* Controls Section */
.controls-section {
  display: flex; /* Changed from grid to flex column to fit inside 300px sidebar */
  flex-direction: column;
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.control-group {
  background: var(--background-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.control-header h3 {
  margin: 0;
  color: var(--text-primary);
  font-size: var(--font-size-h3);
  font-weight: 600;
}

.tooltip {
  color: var(--text-secondary);
  cursor: help;
}

/* Toggle Styles */
.toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.toggle-text {
  font-weight: 500;
  color: var(--text-primary);
  margin: 0;
  transition: color var(--transition-normal);
}

.toggle-text.unselected {
  color: var(--text-secondary);
}

.toggle-btn {
  width: 50px;
  height: 26px;
  background-color: var(--border-color);
  border-radius: var(--radius-pill);
  padding: 3px;
  cursor: pointer;
  transition: background-color var(--transition-normal);
  position: relative;
}

.toggle-btn.toggled {
  background-color: var(--primary-color);
}

.inner-circle {
  width: 20px;
  height: 20px;
  background-color: white;
  border-radius: 50%;
  transition: transform var(--transition-normal);
}

.toggle-btn.toggled .inner-circle {
  transform: translateX(24px);
}

/* Slider Styles */
.slider-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: var(--font-size-caption);
  font-family: var(--font-mono);
}

.slider {
  width: 100%;
  height: 4px;
  background: var(--border-subtle);
  border-radius: var(--radius-pill);
  -webkit-appearance: none;
  appearance: none;
  margin: var(--spacing-sm) 0 var(--spacing-md) 0;
  outline: none;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  background: var(--text-primary);
  border: 2px solid var(--border-subtle);
  border-radius: 50%;
  cursor: grab;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.slider::-webkit-slider-thumb:active {
  cursor: grabbing;
  transform: scale(0.95);
}

/* Color Display */
.color-display {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.color-box {
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.color-info {
  margin-bottom: var(--spacing-md);
}

.color-info h3 {
  margin: 0;
  color: var(--text-primary);
  font-size: var(--font-size-h3);
  font-weight: 600;
}

.color-name {
  display: block;
  color: var(--text-secondary);
  font-size: var(--font-size-caption);
  margin-top: var(--spacing-xs);
}

.box {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.box:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md), inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.color-values {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  font-size: var(--font-size-caption);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  background: var(--bg-base);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.contrast-ratio {
  margin-top: var(--spacing-xs);
  font-weight: 500;
  color: var(--accent-hover);
}

/* Color Presets */
.color-presets h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.preset-color {
  width: 100%;
  aspect-ratio: 1;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.preset-color:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-md);
  z-index: 10;
  position: relative;
}

/* Additional Tools */
.additional-tools {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.tool-section {
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.tool-section h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--text-primary);
}

/* Color History */
.color-history {
  margin-top: var(--spacing-xl);
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.section-header h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
}

.history-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.history-color {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
  border: none;
}

.history-color:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-md);
  z-index: 10;
  position: relative;
}

/* Color Scheme Display */
.scheme-colors {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(40px, 1fr));
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  max-width: 100%;
}

.scheme-colors .history-color {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
  border: none;
}

.scheme-colors .history-color:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-md);
  z-index: 10;
  position: relative;
}

/* Responsive Design */
@media (max-width: 1200px) {
  .container {
    margin: var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  .container {
    margin: var(--spacing-md);
    padding: var(--spacing-md);
  }

  .title {
    font-size: 2rem;
  }

  .format-inputs {
    flex-direction: column;
  }

  .input-with-label {
    width: 100%;
  }

  .button {
    padding: var(--spacing-md);
  }

  .scheme-buttons,
  .export-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .color-display {
    grid-template-columns: 1fr;
  }

  .preset-grid {
    grid-template-columns: repeat(auto-fit, minmax(50px, 1fr));
  }

  .controls-section {
    grid-template-columns: 1fr;
  }

  .control-group {
    padding: var(--spacing-md);
  }

  .box {
    aspect-ratio: 16/9;
  }

  .scheme-colors {
    grid-template-columns: repeat(auto-fit, minmax(50px, 60px));
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    margin: 0;
    padding: var(--spacing-sm);
    border-radius: 0;
  }

  .title {
    font-size: 1.75rem;
  }

  .input-group,
  .color-box,
  .color-presets {
    padding: var(--spacing-md);
  }

  .toggle {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .toggle-btn {
    align-self: center;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --background-primary: #1a1a1a;
    --background-secondary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --border-color: #404040;
    --shadow-color: rgba(0, 0, 0, 0.3);
    /* Semantic colors stay vibrant in dark mode */
    --error-color: #f87171;
    --warning-color: #fbbf24;
    --info-color: #60a5fa;
  }

  input[type="text"] {
    background-color: var(--background-primary);
    color: var(--text-primary);
  }

  input[type="color"] {
    background-color: var(--background-primary);
  }

  #clearHistory.button {
    border-color: var(--text-secondary);
    color: var(--text-secondary);
  }

  #clearHistory.button:hover {
    background-color: var(--text-secondary);
    color: var(--background-primary);
  }

  .button::after {
    background: rgba(255, 255, 255, 0.15);
  }

  .control-group {
    background: var(--background-primary);
  }

  .toggle-btn {
    background-color: var(--border-color);
  }

  .inner-circle {
    background-color: var(--background-primary);
  }

  .slider {
    background: var(--border-color);
  }

  .slider::-webkit-slider-thumb {
    background: var(--primary-color);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }

  .button {
    transition: none;
  }

  .button:hover {
    transform: none;
  }
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.button:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.2);
}

/* Empty State */
.history-empty {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
  font-size: var(--font-size-caption);
  grid-column: 1 / -1;
}

/* Section Title */
.section-title {
  font-size: var(--font-size-h2);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

/* Slider Value Display */
.slider-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.slider-value {
  min-width: 3.5rem;
  text-align: right;
  font-size: var(--font-size-caption);
  font-weight: 500;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

/* Print Styles */
@media print {
  .container {
    margin: 0;
    padding: 0;
    box-shadow: none;
  }

  .button,
  input[type="color"],
  .preset-color {
    display: none;
  }
}

/* ==========================================
   WCAG Compliance Badges
   ========================================== */
.wcag-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-small);
  font-weight: 600;
  margin-left: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.wcag-aaa {
  background-color: var(--success-color);
  color: white;
}

.wcag-aaa::after {
  content: " \2605"; /* Star symbol */
}

.wcag-aa {
  background-color: var(--success-color);
  color: white;
}

.wcag-aa-large {
  background-color: var(--warning-color);
  color: #1a1a1a;
}

.wcag-fail {
  background-color: var(--error-color);
  color: white;
}

/* ==========================================
   Keyboard Hints
   ========================================== */
.keyboard-hints {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--background-secondary);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-xl);
  font-size: var(--font-size-caption);
  color: var(--text-secondary);
}

.keyboard-hint-title {
  font-weight: 600;
  color: var(--text-primary);
}

.keyboard-hint {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

kbd {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--background-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: var(--font-size-small);
  box-shadow: 0 2px 0 var(--border-color);
  min-width: 24px;
  text-align: center;
}

/* ==========================================
   Lock Indicator
   ========================================== */
.lock-indicator {
  margin-left: auto;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-small);
  font-weight: 500;
  background: var(--background-primary);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.lock-indicator.active {
  background: var(--warning-color);
  color: #1a1a1a;
  border-color: var(--warning-dark);
}

/* ==========================================
   Toast Notifications
   ========================================== */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: var(--background-primary);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: var(--font-size-caption);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 1000;
  pointer-events: none;
}

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

/* ==========================================
   Disabled Input States
   ========================================== */
input[type="text"]:disabled,
input[type="color"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ==========================================
   Responsive adjustments for new features
   ========================================== */
@media (max-width: 768px) {
  .keyboard-hints {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .lock-indicator {
    margin-left: 0;
    margin-top: var(--spacing-sm);
  }

  .wcag-badge {
    display: block;
    margin-left: 0;
    margin-top: var(--spacing-xs);
  }
}

@media (max-width: 480px) {
  .keyboard-hints {
    padding: var(--spacing-sm);
  }

  kbd {
    padding: 2px 4px;
    min-width: 20px;
  }
}

/* Dark Mode adjustments for new features */
@media (prefers-color-scheme: dark) {
  kbd {
    background: var(--background-secondary);
    border-color: var(--border-color);
    box-shadow: 0 2px 0 var(--border-color);
  }

  .toast {
    background: var(--background-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
  }

  .lock-indicator {
    background: var(--background-secondary);
  }
}

/* ==========================================
   Feature 1: Image Color Extraction
   ========================================== */
.image-extract-section {
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-xl);
}

.image-extract-section h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--text-primary);
}

.image-upload-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
  cursor: pointer;
  background: var(--background-primary);
}

.image-upload-area:hover {
  border-color: var(--primary-color);
  background: rgba(74, 144, 226, 0.05);
}

.image-upload-area.drag-over {
  border-color: var(--success-color);
  background: rgba(46, 204, 113, 0.1);
  transform: scale(1.02);
}

.image-upload-area p {
  margin: 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.image-upload-area #uploadBtn {
  margin: 0;
}

.extracted-colors {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  max-width: 100%;
}

.extracted-colors:empty {
  display: none;
}

.extracted-color {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  position: relative;
  border: 2px solid transparent;
}

.extracted-color:hover {
  transform: scale(1.08);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.extracted-color::after {
  content: attr(data-hex);
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--font-size-small);
  color: var(--text-secondary);
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.extracted-color:hover::after {
  opacity: 1;
}

.image-preview-container {
  margin-top: var(--spacing-md);
  text-align: center;
}

.image-preview {
  max-width: 100%;
  max-height: 200px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* ==========================================
   Feature 2: Real-time UI Preview
   ========================================== */
.ui-preview-section {
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: var(--spacing-xl) 0;
}

.ui-preview-section h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--text-primary);
}

.preview-container {
  display: flex; /* Changed from grid to fit right sidebar */
  flex-direction: column;
  gap: var(--spacing-lg);
}

.preview-card {
  background: var(--background-primary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.preview-card:hover {
  box-shadow: var(--shadow-lg);
}

.preview-header {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

.preview-text {
  font-size: var(--font-size-body);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.preview-button {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: var(--font-size-body);
  cursor: pointer;
  transition: all var(--transition-normal);
  color: white;
}

.preview-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  filter: brightness(1.1);
}

.preview-button:active {
  transform: translateY(0);
}

.preview-nav {
  background: var(--background-primary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  align-items: center;
  justify-content: center;
}

.preview-nav-item {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-caption);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  color: var(--text-secondary);
}

.preview-nav-item:hover {
  color: var(--text-primary);
}

.preview-nav-item.active {
  color: white;
}

/* ==========================================
   Responsive adjustments for new sections
   ========================================== */
@media (max-width: 768px) {
  .image-upload-area {
    padding: var(--spacing-lg);
  }

  .extracted-colors {
    grid-template-columns: repeat(auto-fit, minmax(50px, 60px));
    justify-content: center;
  }

  .preview-container {
    grid-template-columns: 1fr;
  }

  .preview-nav {
    flex-direction: column;
  }

  .preview-nav-item {
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .image-extract-section,
  .ui-preview-section {
    padding: var(--spacing-md);
  }

  .image-upload-area p {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .extracted-color::after {
    display: none;
  }
}

/* ==========================================
   Dark Mode for new features
   ========================================== */
@media (prefers-color-scheme: dark) {
  .image-upload-area {
    background: var(--background-primary);
    border-color: var(--border-color);
  }

  .image-upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(74, 144, 226, 0.1);
  }

  .image-upload-area.drag-over {
    background: rgba(46, 204, 113, 0.15);
  }

  .preview-card {
    background: var(--background-primary);
  }

  .preview-nav {
    background: var(--background-primary);
  }

  .extracted-color {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  }
}

/* ==========================================
   Gradient Generator Section
   ========================================== */
.gradient-section {
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: var(--spacing-xl) 0;
}

.gradient-section h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--text-primary);
}

.gradient-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  align-items: flex-start;
  margin-bottom: var(--spacing-lg);
}

.gradient-type-toggle {
  display: flex;
  gap: var(--spacing-sm);
}

.gradient-type-btn {
  background-color: var(--background-primary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
  min-width: 100px;
}

.gradient-type-btn:hover {
  border-color: var(--primary-color);
  background-color: var(--background-primary);
}

.gradient-type-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.gradient-angle-control {
  flex: 1;
  min-width: 200px;
}

.gradient-angle-control.hidden {
  display: none;
}

.gradient-preview-container {
  margin-bottom: var(--spacing-lg);
}

.gradient-preview {
  width: 100%;
  height: 150px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-normal);
}

.gradient-output {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
}

.gradient-code {
  flex: 1;
  min-width: 200px;
  padding: var(--spacing-md);
  background: var(--background-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: "Courier New", monospace;
  font-size: var(--font-size-caption);
  color: var(--text-primary);
  word-break: break-all;
  overflow-x: auto;
}

/* Responsive adjustments for gradient section */
@media (max-width: 768px) {
  .gradient-controls {
    flex-direction: column;
  }

  .gradient-type-toggle {
    width: 100%;
  }

  .gradient-type-btn {
    flex: 1;
  }

  .gradient-angle-control {
    width: 100%;
  }

  .gradient-output {
    flex-direction: column;
  }

  .gradient-code {
    width: 100%;
  }

  .gradient-output .button {
    width: 100%;
  }
}

/* Dark Mode for gradient section */
@media (prefers-color-scheme: dark) {
  .gradient-type-btn {
    background-color: var(--background-primary);
    border-color: var(--border-color);
  }

  .gradient-type-btn:hover {
    border-color: var(--primary-color);
  }

  .gradient-type-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
  }

  .gradient-code {
    background: var(--background-primary);
    border-color: var(--border-color);
  }
}

/* ==========================================
   Colorblind Simulation Section
   ========================================== */
.colorblind-section {
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: var(--spacing-xl) 0;
}

.colorblind-section h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--text-primary);
}

.colorblind-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.colorblind-btn {
  background-color: var(--background-primary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
  flex: 1;
  min-width: 120px;
}

.colorblind-btn:hover {
  border-color: var(--primary-color);
  background-color: var(--background-primary);
}

.colorblind-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* Responsive adjustments for colorblind section */
@media (max-width: 768px) {
  .colorblind-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .colorblind-btn {
    min-width: auto;
  }
}

/* Dark Mode for colorblind section */
@media (prefers-color-scheme: dark) {
  .colorblind-btn {
    background-color: var(--background-primary);
    border-color: var(--border-color);
  }

  .colorblind-btn:hover {
    border-color: var(--primary-color);
  }

  .colorblind-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
  }
}