/* ===== PICK & PLACE CALCULATOR STYLES ===== */

/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-accent: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --border-radius: 0.5rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.2s ease-in-out;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.15);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #fbbf24;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Calculator Section */
.calculator-section {
    padding: 3rem 0;
}

.calculator-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* Tab Navigation */
.tab-navigation {
    display: flex;
    background: var(--bg-accent);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.tab-btn {
    background: none;
    border: none;
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    color: var(--text-secondary);
    font-weight: 500;
}

.tab-btn.active {
    background: var(--bg-primary);
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.tab-btn:hover:not(.active) {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.tab-text {
    font-size: 0.875rem;
}

/* Tab Content */
.tab-content {
    padding: 2rem;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* Form Styles */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-control {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    transition: var(--transition);
    background: var(--bg-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control:hover {
    border-color: var(--text-muted);
}

/* Slider Styles */
.slider-container {
    position: relative;
    margin-top: 0.5rem;
}

.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-accent);
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Calculate Section */
.calculate-section {
    margin-top: 2rem;
    padding: 2rem;
    background: var(--bg-accent);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.calculate-container {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.btn-calculate {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1d4ed8 100%);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 1rem;
    min-width: 200px;
    position: relative;
    overflow: hidden;
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn-calculate:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-calculate .btn-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-demo {
    background: var(--warning-color);
    color: white;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-demo:hover {
    background: #d97706;
    transform: translateY(-1px);
}

/* Validation Summary */
.validation-summary {
    margin-top: 1rem;
    padding: 1rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--border-radius);
    color: #991b1b;
}

.validation-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.validation-summary ul {
    margin: 0;
    padding-left: 1.5rem;
}

.validation-summary li {
    margin-bottom: 0.25rem;
}

/* Button Styles */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 0.875rem;
}

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

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: var(--bg-accent);
    border-color: var(--text-muted);
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.btn-export {
    background: var(--success-color);
    color: white;
}

.btn-export:hover {
    background: #059669;
    transform: translateY(-1px);
}

.btn-template {
    background: var(--warning-color);
    color: white;
    width: 100%;
    margin-top: 1rem;
}

.btn-template:hover {
    background: #d97706;
    transform: translateY(-1px);
}

/* Results Section */
.results-container {
    max-width: 100%;
}

.results-placeholder {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.placeholder-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    opacity: 0.7;
}

.results-placeholder h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.results-placeholder p {
    font-size: 1rem;
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Key Metrics */
.key-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 100%);
    pointer-events: none;
}

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

.metric-card.primary {
    border-left-color: var(--primary-color);
}

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

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

.metric-card.info {
    border-left-color: #06b6d4;
}

.metric-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.metric-card.success .metric-icon {
    color: var(--success-color);
}

.metric-card.warning .metric-icon {
    color: var(--warning-color);
}

.metric-card.info .metric-icon {
    color: #06b6d4;
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    line-height: 1;
}

.metric-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.metric-unit {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Recommendations Section */
.recommendations-section {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.recommendations-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.recommendations-section h3 i {
    color: var(--warning-color);
}

.recommendations-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.recommendation-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-accent);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--primary-color);
}

.recommendation-icon {
    color: var(--primary-color);
    margin-top: 0.125rem;
    flex-shrink: 0;
}

.recommendation-content {
    flex: 1;
}

.recommendation-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.recommendation-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Optimization Section */
.optimization-section {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.optimization-section h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.optimization-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.optimization-card {
    background: var(--bg-accent);
    border-radius: var(--border-radius);
    padding: 1rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.optimization-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.optimization-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.optimization-parameter {
    font-weight: 600;
    color: var(--text-primary);
}

.optimization-impact {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
    font-weight: 500;
}

.optimization-impact.high {
    background: #dcfce7;
    color: #166534;
}

.optimization-impact.medium {
    background: #fef3c7;
    color: #92400e;
}

.optimization-impact.low {
    background: #dbeafe;
    color: #1e40af;
}

.optimization-suggestion {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.optimization-action {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.optimization-action:hover {
    background: #1d4ed8;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.results-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.result-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.result-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.result-header i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.result-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.result-label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

/* Export Section */
.export-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.export-section h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.export-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Template Actions */
.template-actions {
    margin-top: 2rem;
    padding: 2rem;
    background: var(--bg-accent);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
}

.template-actions-content h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.template-actions-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.template-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* History Actions */
.history-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

/* Charts Section */
.charts-placeholder {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.charts-placeholder .placeholder-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    opacity: 0.7;
}

.charts-placeholder h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.charts-placeholder p {
    font-size: 1rem;
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.charts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.charts-header h3 {
    color: var(--text-primary);
    margin: 0;
}

.charts-container {
    display: block;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.chart-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.chart-card h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    text-align: center;
}

.chart-card canvas {
    max-width: 100%;
    height: 300px;
}

/* Templates Section */
.templates-container h3 {
    margin-bottom: 2rem;
    color: var(--text-primary);
    text-align: center;
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.template-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

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

.template-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.template-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.template-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.template-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.template-content ul {
    list-style: none;
    padding: 0;
}

.template-content li {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-bottom: 0.25rem;
    padding-left: 1rem;
    position: relative;
}

.template-content li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* History Section */
.history-container h3 {
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.history-list {
    min-height: 200px;
}

.history-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.history-empty i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

/* How It Works Section */
.how-it-works {
    padding: 4rem 0;
    background: var(--bg-primary);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step-card {
    text-align: center;
    padding: 2rem 1rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.step-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Use Cases Section */
.use-cases {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.use-case-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.use-case-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.use-case-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.use-case-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Related Calculators Section */
.related-calculators {
    padding: 4rem 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 0 auto;
    line-height: 1.6;
}

.calculators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.calculator-category {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.calculator-category.filling-sealing {
    border-left: 4px solid #3b82f6;
}

.calculator-category.cartoning-boxing {
    border-left: 4px solid #10b981;
}

.calculator-category.wrapping-bundling {
    border-left: 4px solid #8b5cf6;
}

.calculator-category.labeling-coding {
    border-left: 4px solid #f59e0b;
}

.calculator-category.quality-control {
    border-left: 4px solid #ef4444;
}

.calculator-category.material-handling {
    border-left: 4px solid #6366f1;
}

.category-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    gap: 0.75rem;
}

.category-icon {
    font-size: 1.5rem;
}

.category-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.category-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.calculator-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 0;
    transition: var(--transition);
    border-radius: 4px;
    padding-left: 0.5rem;
}

.calculator-link:hover {
    color: var(--primary-color);
    background: var(--bg-accent);
    padding-left: 1rem;
}

.calculator-link.current {
    color: var(--primary-color);
    font-weight: 600;
    background: var(--bg-accent);
    padding-left: 1rem;
}

/* FAQ Section */
.faq {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-question h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0;
}

.faq-question i {
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 0 1.5rem 0;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Privacy Banner */
.privacy-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--text-primary);
    color: white;
    padding: 1rem;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transform: translateY(100%);
    transition: transform 0.3s ease-in-out;
}

.privacy-banner.show {
    transform: translateY(0);
}

.privacy-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    gap: 1rem;
    flex-wrap: wrap;
}

.privacy-text p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.4;
}

.privacy-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.privacy-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.privacy-btn:hover {
    background: #1d4ed8;
}

.privacy-link {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}

.privacy-link:hover {
    color: white;
    text-decoration: underline;
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    transform: translateX(400px);
    transition: var(--transition);
    z-index: 1000;
}

.notification.show {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.notification-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

/* Animations */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(37, 99, 235, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.key-metrics {
    animation: slideInUp 0.6s ease-out;
}

.recommendations-section {
    animation: slideInUp 0.8s ease-out;
}

.optimization-section {
    animation: slideInUp 1s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .tab-navigation {
        flex-direction: column;
    }

    .tab-btn {
        justify-content: center;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .calculate-container {
        flex-direction: column;
    }

    .btn-calculate {
        min-width: auto;
        width: 100%;
    }

    .key-metrics {
        grid-template-columns: repeat(2, 1fr);
    }

    .results-header {
        flex-direction: column;
        align-items: stretch;
    }

    .results-actions {
        justify-content: center;
    }

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

    .templates-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        grid-template-columns: 1fr;
    }

    .use-cases-grid {
        grid-template-columns: 1fr;
    }

    .export-buttons {
        justify-content: center;
    }

    .optimization-cards {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
    }

    .tab-content {
        padding: 1rem;
    }

    .hero {
        padding: 2rem 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .calculate-section {
        padding: 1rem;
    }

    .key-metrics {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .metric-value {
        font-size: 2rem;
    }

    .tab-navigation {
        overflow-x: auto;
        flex-direction: row;
    }

    .tab-btn {
        min-width: 120px;
        flex-shrink: 0;
    }

    .results-placeholder {
        padding: 2rem 1rem;
    }

    .placeholder-icon {
        font-size: 3rem;
    }

    .results-placeholder h3 {
        font-size: 1.25rem;
    }
}

/* Accessibility Improvements */
.btn:focus-visible,
.form-control:focus-visible,
.tab-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --text-primary: #000000;
        --text-secondary: #333333;
        --border-color: #666666;
    }
    
    .form-control {
        border-width: 2px;
    }
    
    .btn-secondary {
        border-width: 2px;
        border-color: #000000;
        color: #000000;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .stat-card:hover,
    .result-card:hover,
    .template-card:hover,
    .use-case-card:hover {
        transform: none;
    }
}

/* Footer */
.footer {
    background: var(--bg-accent);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 2rem;
}

.footer-content {
    text-align: center;
    color: var(--text-secondary);
}

.footer-content p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
}

.footer-contact {
    margin-top: 0.5rem;
}

.footer-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.footer-link:hover {
    text-decoration: underline;
    color: #1d4ed8;
}

/* Navigation Buttons */
.btn-secondary {
    background: white;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-secondary:hover {
    background: var(--bg-accent);
    border-color: var(--text-muted);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* History Item Styles */
.history-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

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

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.history-date {
    font-weight: 600;
    color: var(--text-primary);
}

.history-robot {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.history-details {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.history-delete {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.75rem;
    opacity: 0;
    transition: var(--transition);
}

.history-item:hover .history-delete {
    opacity: 1;
}

.history-delete:hover {
    background: #dc2626;
}

/* Print Styles */
@media print {
    .tab-navigation,
    .btn,
    .export-section,
    .notification {
        display: none;
    }

    .tab-pane {
        display: block !important;
    }

    .result-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
    }
}