/* ============================================
   AI Color Palette Generator - Modern Stylesheet
   Matching CSS Color Editor Design System
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #3498db;
    --primary-dark: #2980b9;
    --primary-light: #5dade2;
    --secondary: #6c757d;
    --success: #2ecc71;
    --success-dark: #27ae60;
    --danger: #e74c3c;
    --danger-dark: #c0392b;
    --warning: #f39c12;
    --info: #17a2b8;
    
    /* Palette Theme Color */
    --palette-theme: #e74c3c;
    --palette-theme-dark: #c0392b;
    --palette-theme-light: #ec7063;
    --palette-theme-gradient: linear-gradient(135deg, #e74c3c, #f39c12);
    
    /* Neutrals */
    --text-primary: #2c3e50;
    --text-secondary: #5a6c7d;
    --text-muted: #95a5a6;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #ecf0f1;
    --border-color: #e0e6ed;
    --border-light: #eef2f7;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.15);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #ecf7fb;
}

/* Tool Container */
.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px 40px;
}

/* Tool Header */
.tool-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px 20px;
}

.tool-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}

.tool-icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.tool-icon-wrapper.palette-theme {
    background: var(--palette-theme-gradient);
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.tool-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, var(--palette-theme), var(--warning));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tool-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Tool Main */
.tool-main {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 30px;
    margin-bottom: 30px;
}

/* Upload Section */
.upload-section {
    margin-bottom: 25px;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 50px 30px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: linear-gradient(135deg, #fafbfc, #f5f7fa);
}

.upload-area:hover {
    border-color: var(--palette-theme);
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.03), rgba(243, 156, 18, 0.02));
    box-shadow: var(--shadow-md);
}

.upload-area.active {
    border-color: var(--palette-theme);
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.08), rgba(243, 156, 18, 0.04));
    border-style: solid;
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.upload-icon {
    color: var(--palette-theme);
    opacity: 0.8;
}

.upload-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.upload-subtitle {
    color: var(--text-muted);
    margin: 0;
}

.upload-hint {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* Section Divider */
.section-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 30px 0;
    color: var(--text-muted);
    font-size: 14px;
}

.section-divider::before,
.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-color), transparent);
}

.section-divider span {
    padding: 0 20px;
    text-transform: uppercase;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* Custom Color Section */
.custom-color-section {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.custom-color-input-row {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.color-picker-wrapper {
    flex-shrink: 0;
}

.color-picker-input {
    width: 52px;
    height: 52px;
    border: 3px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 2px;
    background: white;
    transition: border-color var(--transition-fast);
}

.color-picker-input:hover {
    border-color: var(--palette-theme);
}

.color-picker-input::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker-input::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

.hex-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0 12px;
    transition: border-color var(--transition-fast);
    flex: 1;
    max-width: 180px;
}

.hex-input-wrapper:focus-within {
    border-color: var(--palette-theme);
}

.hex-prefix {
    color: var(--text-muted);
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 16px;
    font-weight: 600;
}

.hex-input {
    border: none;
    background: transparent;
    padding: 12px 8px;
    font-size: 16px;
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-weight: 600;
    text-transform: uppercase;
    width: 100%;
    color: var(--text-primary);
    outline: none;
}

.hex-input::placeholder {
    color: var(--text-muted);
    text-transform: uppercase;
}

.custom-color-hint {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 16px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--palette-theme-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), #5a6268);
    color: white;
    box-shadow: 0 4px 15px rgba(108, 117, 125, 0.25);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(108, 117, 125, 0.35);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), var(--success-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), var(--danger-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    box-shadow: none;
}

.btn-outline:hover {
    border-color: var(--palette-theme);
    color: var(--palette-theme);
    background: rgba(231, 76, 60, 0.05);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-browse {
    margin-top: 12px;
}

/* Image Preview Section */
.image-preview-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 25px;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.preview-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--text-primary);
}

.preview-title i {
    color: var(--palette-theme);
}

.preview-container {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.preview-container img {
    max-width: 100%;
    max-height: 350px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
}

.file-info {
    display: flex;
    gap: 20px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-light);
}

.file-info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.file-info-item i {
    color: var(--text-muted);
}

/* Options Section */
.options-section {
    margin-bottom: 25px;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 15px;
}

.option-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 20px;
}

.option-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.option-header i {
    color: var(--palette-theme);
}

.option-header h4 {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Styled Select */
.styled-select {
    width: 100%;
    padding: 12px 40px 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    appearance: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235a6c7d' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
}

.styled-select:hover {
    border-color: var(--palette-theme-light);
}

.styled-select:focus {
    outline: none;
    border-color: var(--palette-theme);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.15);
}

/* Method Description */
.method-description {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 15px 20px;
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.05), rgba(243, 156, 18, 0.03));
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-secondary);
}

.method-description i {
    color: var(--warning);
    flex-shrink: 0;
    margin-top: 2px;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 25px;
}

/* Progress Container */
.progress-container {
    margin: 25px 0;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.progress-bar {
    height: 12px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress {
    height: 100%;
    background: var(--palette-theme-gradient);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 12px;
}

#progressText {
    font-size: 14px;
    color: var(--text-muted);
    text-align: center;
    margin: 0;
}

/* Section Headers */
.section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-light);
}

.section-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.section-header i {
    color: var(--palette-theme);
}

.section-desc {
    color: var(--text-secondary);
    margin: 0 0 20px 0;
    font-size: 14px;
}

/* Results Section */
.results-section {
    margin-top: 25px;
}

.palette-section,
.schemes-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 25px;
    margin-bottom: 25px;
}

/* Palette Grid */
.palette-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

/* Color Item */
.color-item {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.color-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.color-item.selected {
    box-shadow: 0 0 0 3px var(--primary), var(--shadow-md);
}

.color-swatch {
    height: 100px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-indicator {
    position: absolute;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-fast);
}

.copy-indicator.show {
    opacity: 1;
    transform: scale(1);
}

.color-hex {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    padding: 12px 15px 4px;
    text-align: center;
}

.color-rgb {
    font-size: 11px;
    color: var(--text-muted);
    padding: 0 15px 12px;
    text-align: center;
}

/* Export Options */
.export-options {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
    flex-wrap: wrap;
}

.export-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.export-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Scheme Result */
.scheme-result {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-top: 20px;
}

.scheme-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 15px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Error Message */
.error-message {
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.1), rgba(192, 57, 43, 0.05));
    color: var(--danger-dark);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-top: 20px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Related Tools */
.related-tools {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
    padding: 20px 25px;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

.related-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 14px;
}

.related-links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.related-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-radius: 50px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.related-link:hover {
    background: var(--palette-theme);
    color: white;
}

.related-link i {
    transition: inherit;
}

/* Info Sections */
.info-sections {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.info-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 30px;
    box-shadow: var(--shadow-md);
}

.info-card h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    margin: 0 0 20px 0;
    color: var(--text-primary);
}

.info-card h2 i {
    color: var(--palette-theme);
}

/* Steps List */
.steps-list {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: step-counter;
}

.steps-list li {
    position: relative;
    padding-left: 60px;
    margin-bottom: 20px;
    counter-increment: step-counter;
    line-height: 1.6;
    color: var(--text-secondary);
    min-height: 40px;
    display: flex;
    align-items: center;
}

.steps-list li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    background: var(--palette-theme-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.steps-list li::after {
    content: '';
    position: absolute;
    left: 19px;
    top: 45px;
    width: 2px;
    height: calc(100% - 25px);
    background: linear-gradient(to bottom, var(--palette-theme), transparent);
}

.steps-list li:last-child::after {
    display: none;
}

/* Methods Grid */
.methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.method-item {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.method-item:hover {
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.method-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.method-icon.dominant {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.method-icon.vibrant {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
}

.method-icon.muted {
    background: linear-gradient(135deg, #95a5a6, #7f8c8d);
}

.method-icon.detailed {
    background: linear-gradient(135deg, #9b59b6, #8e44ad);
}

.method-content h4 {
    margin: 0 0 8px 0;
    font-size: 1rem;
    color: var(--text-primary);
}

.method-content p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Schemes Info Grid */
.schemes-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.scheme-info-item {
    padding: 15px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.scheme-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 8px;
}

.scheme-tag.complementary {
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.15), rgba(52, 152, 219, 0.15));
    color: var(--danger);
}

.scheme-tag.analogous {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.15), rgba(52, 152, 219, 0.15));
    color: var(--success);
}

.scheme-tag.triadic {
    background: linear-gradient(135deg, rgba(155, 89, 182, 0.15), rgba(243, 156, 18, 0.15));
    color: #9b59b6;
}

.scheme-tag.split {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.15), rgba(243, 156, 18, 0.15));
    color: var(--primary);
}

.scheme-tag.tetradic {
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.15), rgba(46, 204, 113, 0.15));
    color: var(--danger);
}

.scheme-tag.monochromatic {
    background: linear-gradient(135deg, rgba(149, 165, 166, 0.2), rgba(127, 140, 141, 0.15));
    color: var(--secondary);
}

.scheme-tag.shades {
    background: linear-gradient(135deg, rgba(52, 73, 94, 0.2), rgba(44, 62, 80, 0.15));
    color: #2c3e50;
}

.scheme-tag.tints {
    background: linear-gradient(135deg, rgba(236, 240, 241, 0.5), rgba(189, 195, 199, 0.3));
    color: #7f8c8d;
}

.scheme-tag.compound {
    background: linear-gradient(135deg, rgba(155, 89, 182, 0.15), rgba(52, 152, 219, 0.15));
    color: #8e44ad;
}

.scheme-tag.square {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.15), rgba(155, 89, 182, 0.15));
    color: #27ae60;
}

.scheme-tag.double {
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.15), rgba(241, 196, 15, 0.15));
    color: #c0392b;
}

.scheme-tag.accented {
    background: linear-gradient(135deg, rgba(243, 156, 18, 0.15), rgba(46, 204, 113, 0.15));
    color: #f39c12;
}

.scheme-tag.near {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.15), rgba(26, 188, 156, 0.15));
    color: #16a085;
}

.scheme-tag.clash {
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.2), rgba(241, 196, 15, 0.2));
    color: #e74c3c;
}

.scheme-tag.fivetone {
    background: linear-gradient(to right, rgba(231, 76, 60, 0.15), rgba(243, 156, 18, 0.15), rgba(46, 204, 113, 0.15), rgba(52, 152, 219, 0.15), rgba(155, 89, 182, 0.15));
    color: #9b59b6;
}

.scheme-tag.sixtone {
    background: linear-gradient(to right, rgba(231, 76, 60, 0.15), rgba(243, 156, 18, 0.15), rgba(241, 196, 15, 0.15), rgba(46, 204, 113, 0.15), rgba(52, 152, 219, 0.15), rgba(155, 89, 182, 0.15));
    color: #3498db;
}

.scheme-tag.neutral {
    background: linear-gradient(135deg, rgba(127, 140, 141, 0.2), rgba(189, 195, 199, 0.15));
    color: #95a5a6;
}

.scheme-info-item p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.faq-item:hover {
    border-color: var(--palette-theme-light);
}

.faq-item.open {
    border-color: var(--palette-theme);
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
    background: var(--bg-secondary);
    border: none;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-tertiary);
}

.faq-item.open .faq-question {
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.08), rgba(243, 156, 18, 0.04));
    color: var(--palette-theme-dark);
}

.faq-question i {
    color: var(--text-muted);
    transition: transform var(--transition-normal);
    flex-shrink: 0;
}

.faq-item.open .faq-question i {
    transform: rotate(180deg);
    color: var(--palette-theme);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.open .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 20px;
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
    background: var(--bg-primary);
}

.faq-answer a {
    color: var(--palette-theme);
    text-decoration: none;
}

.faq-answer a:hover {
    text-decoration: underline;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: white;
    padding: 14px 24px;
    border-radius: 50px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    opacity: 0;
    transition: all var(--transition-normal);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .tool-container {
        padding: 0 15px 30px;
    }
    
    .tool-title-row {
        flex-direction: column;
        gap: 12px;
    }
    
    .tool-title {
        font-size: 1.8rem;
        text-align: center;
    }
    
    .tool-main {
        padding: 20px;
        border-radius: var(--radius-lg);
    }
    
    .upload-area {
        padding: 30px 20px;
    }
    
    .custom-color-input-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hex-input-wrapper {
        max-width: none;
    }
    
    .custom-color-section .btn {
        width: 100%;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
    
    .palette-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 12px;
    }
    
    .color-swatch {
        height: 80px;
    }
    
    .scheme-selector {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .export-options {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .export-buttons {
        width: 100%;
    }
    
    .export-buttons .btn {
        flex: 1;
    }
    
    .file-info {
        flex-direction: column;
        gap: 10px;
    }
    
    .related-tools {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .related-links {
        width: 100%;
    }
    
    .related-link {
        flex: 1;
        justify-content: center;
        min-width: calc(50% - 5px);
    }
    
    .info-card {
        padding: 20px;
        border-radius: var(--radius-lg);
    }
    
    .steps-list li {
        padding-left: 50px;
    }
    
    .steps-list li::before {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
    
    .steps-list li::after {
        left: 16px;
        top: 40px;
        height: calc(100% - 20px);
    }
    
    .methods-grid {
        grid-template-columns: 1fr;
    }
    
    .method-item {
        flex-direction: column;
        text-align: center;
    }
    
    .method-icon {
        margin: 0 auto;
    }
    
    .schemes-info-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .tool-title {
        font-size: 1.5rem;
    }
    
    .tool-description {
        font-size: 1rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .info-card h2 {
        font-size: 1.2rem;
        flex-wrap: wrap;
    }
    
    .palette-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scheme-selector {
        grid-template-columns: 1fr;
    }
    
    .preview-container img {
        max-height: 250px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   COLOR CARD EDIT/DELETE BUTTONS
   ============================================ */
.color-swatch {
    position: relative;
    overflow: visible;
}

.color-actions {
    position: absolute;
    top: 6px;
    right: 6px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s ease;
    z-index: 5;
}

.color-item:hover .color-actions {
    opacity: 1;
}

.color-action-btn {
    width: 26px;
    height: 26px;
    border: none;
    border-radius: 6px;
    background: var(--btn-bg, rgba(0,0,0,0.15));
    color: var(--btn-color, #fff);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all 0.2s ease;
    backdrop-filter: blur(4px);
}

.color-action-btn:hover {
    transform: scale(1.1);
}

.color-action-btn.edit-btn:hover {
    background: rgba(52, 152, 219, 0.9);
    color: #fff;
}

.color-action-btn.delete-btn:hover {
    background: rgba(231, 76, 60, 0.9);
    color: #fff;
}

/* ============================================
   ADD COLOR BUTTON
   ============================================ */
.add-color-item {
    border: 2px dashed var(--border-color);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.add-color-item:hover {
    border-color: var(--primary-color);
    background: rgba(231, 76, 60, 0.05);
}

.add-color-swatch {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.add-color-item:hover .add-color-swatch {
    background: rgba(231, 76, 60, 0.1);
    color: var(--primary-color);
}

.add-color-item .color-hex {
    color: var(--text-muted);
    font-weight: 500;
}

.add-color-item:hover .color-hex {
    color: var(--primary-color);
}

/* ============================================
   COLOR EDIT MODAL
   ============================================ */
.color-edit-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    width: 100%;
    max-width: 380px;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

.modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all 0.2s ease;
    padding: 0;
}

.modal-close:hover {
    background: rgba(231, 76, 60, 0.1);
    color: var(--primary-color);
}

.modal-body {
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.modal-color-preview {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15), inset 0 0 0 1px rgba(0,0,0,0.1);
    transition: background-color 0.2s ease;
}

.modal-color-inputs {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.modal-picker-row {
    display: flex;
    gap: 12px;
    align-items: center;
}

.modal-color-picker {
    width: 56px;
    height: 56px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 0;
    background: none;
    overflow: hidden;
}

.modal-color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.modal-color-picker::-webkit-color-swatch {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
}

.modal-hex-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: #fff;
    padding: 0 12px;
    height: 56px;
    transition: border-color 0.2s ease;
}

.modal-hex-wrapper:focus-within {
    border-color: var(--primary-color);
}

.modal-hex-wrapper .hex-prefix {
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-muted);
}

.modal-hex-input {
    flex: 1;
    border: none;
    background: transparent;
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 18px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-primary);
    padding: 0;
    outline: none;
    letter-spacing: 1px;
}

.modal-rgb-display {
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
}

.modal-footer {
    display: flex;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.modal-footer .btn {
    flex: 1;
}

.modal-footer .btn-secondary {
    background: #fff;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.modal-footer .btn-secondary:hover {
    background: var(--bg-secondary);
}

/* ============================================
   SCHEME GRID - 5+4+SHOW MORE LAYOUT
   ============================================ */
.scheme-selector {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.scheme-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 12px 8px;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.scheme-option:hover {
    border-color: var(--border-color);
    background: #fff;
}

.scheme-option.active {
    border-color: var(--primary-color);
    background: rgba(231, 76, 60, 0.05);
}

.scheme-option.hidden {
    display: none;
}

.scheme-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
}

/* Show More Card - inline in grid */
.show-more-card {
    border: 2px dashed var(--border-color);
    background: transparent;
}

.show-more-card:hover {
    border-color: var(--primary-color);
    background: rgba(231, 76, 60, 0.05);
}

.show-more-card.expanded {
    border-style: solid;
    border-color: var(--text-muted);
}

.show-more-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.show-more-card:hover .show-more-icon {
    color: var(--primary-color);
    background: rgba(231, 76, 60, 0.1);
}

.show-more-card .scheme-name {
    color: var(--text-muted);
}

.show-more-card:hover .scheme-name {
    color: var(--primary-color);
}

/* Scheme preview colors */
.scheme-preview {
    display: flex;
    gap: 2px;
    height: 32px;
    width: 100%;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.scheme-preview-color {
    flex: 1;
    min-width: 8px;
}

/* ============================================
   RESPONSIVE SCHEME GRID
   ============================================ */
@media (max-width: 900px) {
    .scheme-selector {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 700px) {
    .scheme-selector {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 520px) {
    .scheme-selector {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scheme-option {
        padding: 10px 6px;
    }
    
    .scheme-name {
        font-size: 11px;
    }
    
    .scheme-preview {
        height: 28px;
    }
}

/* Modal responsive */
@media (max-width: 480px) {
    .modal-content {
        max-width: 100%;
        margin: 10px;
    }
    
    .modal-color-preview {
        width: 100px;
        height: 100px;
    }
    
    .modal-color-picker {
        width: 48px;
        height: 48px;
    }
    
    .modal-hex-wrapper {
        height: 48px;
    }
    
    .modal-hex-input,
    .modal-hex-wrapper .hex-prefix {
        font-size: 16px;
    }
}