/* ======================
   CSS CUSTOM PROPERTIES
   ====================== */
:root {
    /* Primary Colors */
    --primary-color: #667eea;
    --primary-dark: #5a6fd8;
    --primary-light: #818cf8;
    
    /* Secondary Colors */
    --secondary-color: #f093fb;
    --secondary-dark: #ed7de8;
    --secondary-light: #f5a3ff;
    
    /* Accent Colors */
    --accent-color: #4facfe;
    --accent-dark: #3b82f6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* Neutral Colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --background-primary: #ffffff;
    --background-secondary: #f9fafb;
    --background-tertiary: #f3f4f6;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-light) 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --gradient-error: linear-gradient(135deg, #ef4444 0%, #f87171 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

/* ======================
   RESET & BASE STYLES
   ====================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
      Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* ======================
   TOOL HEADER
   ====================== */
.tool-page {
    min-height: 100vh;
    padding: var(--spacing-xl) var(--spacing-md);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.tool-header {
    background: var(--background-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.tool-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.tool-title-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.tool-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
}

.tool-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.tool-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.tool-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--background-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    min-width: 80px;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ======================
   TEMPLATE SECTION
   ====================== */
.template-section {
    background: var(--background-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.template-section h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.25rem;
    font-weight: 600;
}

.template-section h3 i {
    color: var(--primary-color);
    margin-right: var(--spacing-sm);
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.template-card {
    background: var(--background-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.template-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.template-card.selected {
    background: var(--gradient-primary);
    border-color: var(--primary-dark);
    color: white;
}

.template-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: white;
    flex-shrink: 0;
}

.template-card.selected .template-icon {
    background: rgba(255, 255, 255, 0.2);
}

.template-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.template-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.template-card.selected .template-content p {
    color: rgba(255, 255, 255, 0.8);
}

/* ======================
   COLOR INTERFACE
   ====================== */
.color-interface {
    background: var(--background-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.picker-modes {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
    background: var(--background-secondary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.mode-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.mode-btn:hover {
    background: var(--background-primary);
    color: var(--text-primary);
}

.mode-btn.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.mode-content {
    display: none;
}

.mode-content.active {
    display: block;
}

/* ======================
   COLOR PICKER MODE
   ====================== */
.picker-main {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.color-canvas-section {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.color-canvas-container {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.canvas-cursor {
    position: absolute;
    width: 12px;
    height: 12px;
    border: 2px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3);
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.hue-slider-container,
.alpha-slider-container {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.hue-cursor,
.alpha-cursor {
    position: absolute;
    left: -2px;
    right: -2px;
    height: 4px;
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.3);
    border-radius: 2px;
    pointer-events: none;
    transform: translateY(-50%);
    z-index: 10;
}

.color-info-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.color-preview-large {
    width: 100%;
    height: 80px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    display: flex;
    overflow: hidden;
}

.preview-current,
.preview-previous {
    flex: 1;
    position: relative;
}

.preview-current::after {
    content: 'Current';
    position: absolute;
    bottom: var(--spacing-xs);
    left: var(--spacing-xs);
    font-size: 0.75rem;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.preview-previous::after {
    content: 'Previous';
    position: absolute;
    bottom: var(--spacing-xs);
    right: var(--spacing-xs);
    font-size: 0.75rem;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.color-formats {
    display: grid;
    gap: var(--spacing-md);
}

.format-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.format-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-with-copy {
    display: flex;
    gap: var(--spacing-xs);
}

.input-with-copy input,
.input-with-copy textarea {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    background: var(--background-secondary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.input-with-copy input:focus,
.input-with-copy textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.copy-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    background: var(--background-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

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

.color-sliders {
    display: grid;
    gap: var(--spacing-md);
}

.slider-group {
    display: grid;
    grid-template-columns: 60px 1fr 60px;
    gap: var(--spacing-md);
    align-items: center;
}

.slider-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.slider-group input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--background-tertiary);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--gradient-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.slider-group input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--gradient-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
}

.slider-group input[type="number"] {
    width: 60px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 0.875rem;
    background: var(--background-secondary);
}

.color-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.primary-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-sm);
}

.primary-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.secondary-btn {
    background: var(--background-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

/* ======================
   PALETTE MODE
   ====================== */
.palette-controls {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.palette-type-selector,
.palette-count-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.palette-type-selector label,
.palette-count-selector label {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.palette-type-selector select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background-primary);
    color: var(--text-primary);
}

.palette-count-selector input[type="range"] {
    width: 100px;
}

.palette-display {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.palette-color {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.palette-color:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.palette-color-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: var(--spacing-xs);
    font-size: 0.75rem;
    text-align: center;
    font-family: monospace;
}

/* ======================
   GRADIENT MODE
   ====================== */
.gradient-controls {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.gradient-type-selector,
.gradient-direction {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.gradient-preview {
    height: 200px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.gradient-stops {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.gradient-stop {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--background-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.gradient-stop-color {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    cursor: pointer;
}

.gradient-stop-position {
    flex: 1;
}

.gradient-stop-remove {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-color);
    background: var(--background-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--error-color);
    transition: all var(--transition-fast);
}

.gradient-stop-remove:hover {
    background: var(--error-color);
    color: white;
}

.gradient-output textarea {
    width: 100%;
    height: 100px;
    resize: vertical;
}

/* ======================
   ACCESSIBILITY MODE
   ====================== */
.accessibility-checker {
    display: grid;
    gap: var(--spacing-2xl);
}

.contrast-checker,
.colorblind-simulator {
    padding: var(--spacing-xl);
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.contrast-checker h4,
.colorblind-simulator h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.contrast-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.color-input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.color-input-group label {
    font-weight: 600;
    color: var(--text-primary);
}

.color-input-with-preview {
    display: flex;
    gap: var(--spacing-sm);
}

.color-input-with-preview input[type="color"] {
    width: 50px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.color-input-with-preview input[type="text"] {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: monospace;
}

.contrast-results {
    display: grid;
    gap: var(--spacing-lg);
}

.contrast-preview {
    height: 100px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.contrast-scores {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.score-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--background-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.score-label {
    font-weight: 600;
    color: var(--text-primary);
}

.score-value {
    font-family: monospace;
    font-weight: 700;
    color: var(--primary-color);
}

.score-status {
    font-weight: 600;
}

.score-status.pass {
    color: var(--success-color);
}

.score-status.fail {
    color: var(--error-color);
}

.simulation-controls {
    margin-bottom: var(--spacing-lg);
}

.simulation-controls select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background-primary);
}

.simulation-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    gap: var(--spacing-sm);
}

.simulation-color {
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

/* ======================
   SIDE PANEL
   ====================== */
.side-panel {
    background: var(--background-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

.panel-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    background: var(--background-secondary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.panel-tab {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.panel-tab:hover {
    background: var(--background-primary);
    color: var(--text-primary);
}

.panel-tab.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.panel-section {
    display: none;
}

.panel-section.active {
    display: block;
}

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

.panel-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.panel-action {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-color);
    background: var(--background-secondary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.panel-action:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.saved-colors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: var(--spacing-sm);
}

.saved-color {
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    position: relative;
}

.saved-color:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
}

.saved-color-remove {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 20px;
    height: 20px;
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 0.75rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.saved-color:hover .saved-color-remove {
    opacity: 1;
}

.palettes-list,
.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
}

.palette-item,
.history-item {
    padding: var(--spacing-md);
    background: var(--background-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.palette-item:hover,
.history-item:hover {
    background: var(--background-primary);
    box-shadow: var(--shadow-sm);
}

.palette-colors {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.palette-color-swatch {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.palette-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

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

.export-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

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

/* ======================
   NOTIFICATIONS
   ====================== */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.notification {
    background: var(--background-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--accent-color);
    max-width: 350px;
    animation: slideIn 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.notification.success {
    border-left-color: var(--success-color);
}

.notification.warning {
    border-left-color: var(--warning-color);
}

.notification.error {
    border-left-color: var(--error-color);
}

.notification-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.notification-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.notification-close {
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.notification-close:hover {
    color: var(--text-primary);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ======================
   RESPONSIVE DESIGN
   ====================== */
@media (max-width: 1200px) {
    .picker-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .color-canvas-section {
        justify-content: center;
    }
    
    .tool-stats {
        gap: var(--spacing-md);
    }
    
    .stat-item {
        min-width: 70px;
    }
}

@media (max-width: 992px) {
    .tool-header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .picker-modes {
        flex-wrap: wrap;
    }
    
    .mode-btn {
        flex: none;
        min-width: 140px;
    }
    
    .palette-controls,
    .gradient-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .contrast-inputs {
        grid-template-columns: 1fr;
    }
    
    .contrast-scores {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
    }
    
    .tool-header,
    .template-section,
    .color-interface,
    .side-panel {
        padding: var(--spacing-lg);
    }
    
    .tool-title {
        font-size: 1.5rem;
    }
    
    .tool-subtitle {
        font-size: 1rem;
    }
    
    .tool-stats {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .template-grid {
        grid-template-columns: 1fr;
    }
    
    .template-card {
        flex-direction: column;
        text-align: center;
    }
    
    .color-canvas-section {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }
    
    .hue-slider-container,
    .alpha-slider-container {
        width: 300px;
        height: 30px;
    }
    
    .hue-slider-container canvas,
    .alpha-slider-container canvas {
        width: 300px;
        height: 30px;
    }
    
    .hue-cursor,
    .alpha-cursor {
        top: -2px;
        bottom: -2px;
        width: 4px;
        height: auto;
        transform: translateX(-50%);
    }
    
    .color-sliders {
        grid-template-columns: 1fr;
    }
    
    .slider-group {
        grid-template-columns: 80px 1fr 60px;
    }
    
    .color-actions {
        flex-direction: column;
    }
    
    .palette-display {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    }
    
    .panel-tabs {
        flex-wrap: wrap;
    }
    
    .panel-tab {
        flex: none;
        min-width: 100px;
    }
    
    .saved-colors-grid {
        grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
    }
    
    .notification-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
        top: var(--spacing-md);
    }
    
    .notification {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .color-canvas-container canvas {
        width: 250px;
        height: 250px;
    }
    
    .hue-slider-container,
    .alpha-slider-container {
        width: 250px;
    }
    
    .hue-slider-container canvas,
    .alpha-slider-container canvas {
        width: 250px;
    }
    
    .tool-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .template-icon {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
    
    .contrast-scores {
        grid-template-columns: 1fr;
    }
    
    .simulation-preview {
        grid-template-columns: repeat(auto-fit, minmax(40px, 1fr));
    }
}

/* ======================
   DARK MODE SUPPORT
   ====================== */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --text-muted: #9ca3af;
        --border-color: #374151;
        --background-primary: #1f2937;
        --background-secondary: #111827;
        --background-tertiary: #0f172a;
    }
    
    body {
        background: linear-gradient(135deg, #1e3a8a 0%, #3730a3 100%);
    }
    
    .color-canvas-container,
    .hue-slider-container,
    .alpha-slider-container {
        box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
    }
    
    .input-with-copy input,
    .input-with-copy textarea {
        background: var(--background-tertiary);
        color: var(--text-primary);
    }
}

/* ======================
   PRINT STYLES
   ====================== */
@media print {
    body {
        background: white !important;
    }
    
    .tool-header,
    .template-section,
    .side-panel,
    .picker-modes,
    .notification-container {
        display: none !important;
    }
    
    .color-interface {
        box-shadow: none !important;
        border: 1px solid #000 !important;
    }
    
    .color-preview-large,
    .palette-color,
    .gradient-preview {
        border: 1px solid #000 !important;
    }
}

/* ======================
   ACCESSIBILITY
   ====================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles for keyboard navigation */
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.template-card:focus,
.saved-color:focus,
.palette-color:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-primary: #000000;
        --text-secondary: #333333;
    }
    
    .color-preview-large,
    .palette-color,
    .saved-color {
        border: 2px solid #000000;
    }
    
    .primary-btn,
    .mode-btn.active,
    .panel-tab.active {
        background: #000000;
        color: #ffffff;
    }
}

/* ======================
   CANVAS SPECIFIC STYLES
   ====================== */
canvas {
    display: block;
    cursor: crosshair;
}

.color-canvas-container canvas {
    cursor: crosshair;
}

.hue-slider-container canvas,
.alpha-slider-container canvas {
    cursor: pointer;
}

/* ======================
   UTILITY CLASSES
   ====================== */
.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

.fade-out {
    animation: fadeOut 0.3s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.bounce {
    animation: bounce 0.5s ease-in-out;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}