/* ===========================
   Global Styles
   =========================== */
:root {
    --primary-color: #1a56db;
    --primary-dark: #1e3a8a;
    --secondary-color: #64748b;
    --accent-color: #0891b2;
    --success-color: #059669;
    --danger-color: #dc2626;
    --light-bg: #f8fafc;
    --dark-bg: #0f172a;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --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);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
}

.container {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===========================
   Navigation Bar
   =========================== */
.navbar {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
}

.nav-brand {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--primary-color);
    background-color: rgba(26, 86, 219, 0.08);
}

.nav-links a.active {
    color: var(--primary-color);
    background-color: rgba(26, 86, 219, 0.12);
    font-weight: 700;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #3b82f6 100%);
    color: white;
    padding: 6rem 0 5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(96, 165, 250, 0.2) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.hero-subtitle {
    font-size: 1.35rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    font-weight: 400;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

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

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.25);
    border-color: white;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.625rem 1.25rem;
    font-size: 0.925rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-remove {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    padding: 0.25rem;
    font-size: 1.2rem;
    transition: transform 0.2s;
}

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

/* ===========================
   Sections
   =========================== */
.section {
    padding: 5rem 0;
}

.bg-light {
    background-color: var(--light-bg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.page-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 900px;
    line-height: 1.8;
}

.lead {
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

/* ===========================
   Cards and Grids
   =========================== */
.findings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.finding-card {
    background: white;
    padding: 2.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid var(--primary-color);
}

.finding-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

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

.finding-card h3 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 700;
}

.finding-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
}

.splits-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2.5rem;
}

.split-card {
    background: white;
    padding: 2.5rem;
    border-radius: 0.75rem;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
}

.split-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.split-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1.25rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
}

.split-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.stat-badge {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    padding: 0.6rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--primary-color);
    border: 1px solid #bfdbfe;
}

.split-card p {
    line-height: 1.8;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.properties-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2.5rem;
}

.property-card {
    background: white;
    padding: 2.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    border-left: 5px solid var(--primary-color);
}

.property-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.property-card ul {
    list-style: none;
    padding-left: 0;
}

.property-card li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    line-height: 1.7;
    font-size: 1rem;
    color: var(--text-secondary);
}

.property-card li:last-child {
    border-bottom: none;
}

.property-card li strong {
    color: var(--text-primary);
    font-weight: 700;
}

/* ===========================
   Getting Started
   =========================== */
.getting-started {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.step {
    background: white;
    padding: 2.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid var(--primary-color);
}

.step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.step-number {
    position: absolute;
    top: -1.25rem;
    left: 2rem;
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
}

.step h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
}

.step p {
    margin-bottom: 1.25rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.code-block {
    display: block;
    background-color: var(--dark-bg);
    color: #e2e8f0;
    padding: 1.25rem;
    border-radius: 0.5rem;
    font-family: 'Courier New', Consolas, Monaco, monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    margin: 1.25rem 0;
    border: 1px solid #334155;
    line-height: 1.6;
}

/* ===========================
   Citation
   =========================== */
.citation-box {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.citation-box pre {
    background-color: var(--dark-bg);
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 0;
}

.citation-box code {
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
}

/* Contact Info Section */
.contact-info-section {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    margin-top: 2rem;
}

.contact-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-text {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.contact-details {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

.contact-author {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin: 0;
}

.contact-author strong {
    font-size: 1.1rem;
    color: var(--primary-color);
}

.contact-author a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.contact-author a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
    padding: 3.5rem 0 2rem;
    margin-top: 6rem;
    border-top: 3px solid var(--primary-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-section {
    text-align: left;
}

.footer-section p {
    margin: 0.5rem 0;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer a {
    color: rgba(255, 255, 255, 0.95);
    transition: color 0.2s;
    font-weight: 500;
}

.footer a:hover {
    color: #60a5fa;
}

.footer-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
    padding: 0.6rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-links a:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-section {
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }
    
    .footer-links a {
        width: 100%;
        justify-content: center;
    }
}

/* ===========================
   Explorer Page
   =========================== */
.explorer-container {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

.upload-section {
    margin: 2rem 0;
}

.upload-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.upload-card h2 {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.upload-area {
    border: 3px dashed var(--border-color);
    border-radius: 1rem;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background-color: var(--light-bg);
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: #eff6ff;
}

.upload-area i {
    font-size: 3rem;
    color: var(--primary-color);
    display: block;
    margin-bottom: 1rem;
}

.file-info {
    background-color: var(--light-bg);
    padding: 1rem;
    border-radius: 0.5rem;
    margin: 1rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sample-data-section {
    text-align: center;
    padding: 1rem;
}

.loading-indicator {
    text-align: center;
    padding: 3rem;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.results-section {
    margin-top: 2rem;
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
}

.stat-content {
    display: flex;
    flex-direction: column;
}

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

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

.controls-panel {
    background: white;
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

.filter-select,
.search-input {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.filter-select:focus,
.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Model Selector Panel - Professional Design */
.model-selector-panel {
    background: white;
    padding: 1.75rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.model-selector-panel .panel-header {
    margin-bottom: 1.5rem;
}

.model-selector-panel .panel-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 1.15rem;
    color: var(--text-primary);
}

.model-selector-panel .panel-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.model-selector-panel .panel-actions {
    display: flex;
    gap: 0.75rem;
    padding-left: 2rem;
}

.btn-inline {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border: 2px solid var(--primary-color);
    background: white;
    color: var(--primary-color);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

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

.model-checkboxes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 0.875rem;
    margin-top: 1rem;
}

.model-checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--light-bg);
    cursor: pointer;
    transition: all 0.2s;
}

.model-checkbox-item:hover {
    background: #e0e7ff;
    border-color: var(--primary-color);
    transform: translateX(2px);
}

.model-checkbox-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.model-checkbox-item label {
    cursor: pointer;
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Legend Box - Elegant Design */
.legend-box {
    margin-top: 1.75rem;
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 0.75rem;
    border: 2px solid var(--border-color);
}

.legend-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.legend-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-primary);
    padding: 0.5rem;
    background: white;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.legend-bar {
    width: 50px;
    height: 24px;
    border-radius: 0.375rem;
    flex-shrink: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.human-bar-demo {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.model-bar-demo {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
}

.pagination-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 1.5rem 0;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-info {
    color: var(--text-secondary);
}

.questions-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.question-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.question-card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
}

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

.question-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.meta-tag {
    background-color: var(--light-bg);
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.kl-badge {
    background-color: var(--light-bg);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 700;
    font-size: 0.875rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.kl-badge.good {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.kl-badge.medium {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
    border: 1px solid #fcd34d;
}

.kl-badge.bad {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.question-text {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.persona-text {
    background-color: var(--light-bg);
    padding: 0.75rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

.options-container {
    margin-bottom: 1.5rem;
}

.option-item {
    margin-bottom: 1rem;
    padding: 1rem;
    background-color: var(--light-bg);
    border-radius: 0.5rem;
}

.option-label {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.distribution-bars {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-top: 0.5rem;
}

.bar-container {
    flex: 1;
}

.bar-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.bar-wrapper {
    background-color: #e5e7eb;
    border-radius: 0.25rem;
    height: 1.5rem;
    overflow: hidden;
    position: relative;
}

.bar-fill {
    height: 100%;
    transition: width 0.3s;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 0.5rem;
}

.bar-fill.human {
    background-color: var(--primary-color);
}

.bar-fill.model {
    background-color: var(--accent-color);
}

.bar-text {
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
}

/* System Prompt Box Styles */
.system-prompt-box {
    background: linear-gradient(to right, #f8fafc 0%, #f1f5f9 100%);
    border-left: 4px solid #64748b;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.system-prompt-header {
    font-size: 0.875rem;
    font-weight: 700;
    color: #475569;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.system-prompt-text {
    font-size: 0.95rem;
    color: #334155;
    line-height: 1.7;
    white-space: pre-wrap;
}

.question-text {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

/* Elegant Row-Based Response Visualization */
.response-visualization {
    margin-top: 2rem;
    background: white;
    border-radius: 0.75rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.viz-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1.25rem 1.5rem;
}

.viz-models {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.viz-model-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: white;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 0.5rem;
    backdrop-filter: blur(10px);
}

.viz-model-label.human-label {
    background: rgba(59, 130, 246, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.model-score {
    padding: 0.2rem 0.6rem;
    border-radius: 0.3rem;
    font-size: 0.8rem;
    font-weight: 700;
    background: rgba(0, 0, 0, 0.2);
}

.model-score.good {
    background: rgba(16, 185, 129, 0.4);
}

.model-score.medium {
    background: rgba(245, 158, 11, 0.4);
}

.model-score.bad {
    background: rgba(239, 68, 68, 0.4);
}

/* Response Option Rows */
.response-option-row {
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
}

.response-option-row:hover {
    background-color: #fafbfc;
}

.response-option-row:last-child {
    border-bottom: none;
}

.option-label-section {
    padding: 1.25rem 1.5rem 0.75rem 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.option-letter {
    font-weight: 700;
    font-size: 1.1rem;
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 0.4rem 0.8rem;
    border-radius: 0.5rem;
    min-width: 2.5rem;
    text-align: center;
    flex-shrink: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.option-description {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    flex: 1;
    padding-top: 0.2rem;
}

.option-bars-section {
    padding: 0.5rem 1.5rem 1.25rem 1.5rem;
    display: flex;
    gap: 1rem;
}

.response-bar-wrapper {
    flex: 1;
    background-color: #f1f3f5;
    border-radius: 0.5rem;
    height: 3rem;
    position: relative;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.response-bar {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 0.75rem;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.bar-value {
    color: white;
    font-size: 0.9rem;
    font-weight: 700;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 2;
}

.human-response-bar {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.model-response-bar {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.model-response-bar.match-close {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.model-response-bar.match-far {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

/* Responsive: Stack bars vertically on smaller screens */
@media (max-width: 1200px) {
    .viz-models {
        flex-wrap: wrap;
    }
    
    .option-bars-section {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .response-bar-wrapper {
        height: 2.5rem;
    }
}

/* Model Scores Summary - Refined Design */
.model-scores-summary {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.score-label {
    color: white;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.025em;
    text-transform: uppercase;
    opacity: 0.95;
}

.score-list {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    flex: 1;
}

.model-score-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all 0.2s ease;
}

.model-score-chip:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
    background: rgba(255, 255, 255, 0.25);
}

.model-name-short {
    font-size: 0.9rem;
    font-weight: 600;
}

.score-value {
    font-weight: 800;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.25);
    padding: 0.2rem 0.6rem;
    border-radius: 0.3rem;
}

.response-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    background: white;
}

.response-table thead {
    background: linear-gradient(to bottom, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 2px solid #cbd5e1;
}

.response-table th {
    padding: 1.25rem 1rem;
    text-align: left;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.025em;
    text-transform: uppercase;
}

.response-table th.option-col {
    width: 35%;
    min-width: 220px;
}

.response-table th.response-col {
    width: auto;
    text-align: center;
}

.response-table th.human-col {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(37, 99, 235, 0.15) 100%);
}

.response-table tbody tr {
    border-bottom: 1px solid #e2e8f0;
    transition: background-color 0.2s;
}

.response-table tbody tr:hover {
    background-color: #f8fafc;
}

.response-table tbody tr:last-child {
    border-bottom: none;
}

.option-cell {
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.option-letter {
    font-weight: 800;
    font-size: 1.05rem;
    color: white;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    padding: 0.4rem 0.75rem;
    border-radius: 0.4rem;
    min-width: 2.25rem;
    text-align: center;
    flex-shrink: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.option-text {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
    flex: 1;
    font-weight: 500;
}

.response-cell {
    padding: 0.75rem 1rem;
}

.bar-container {
    position: relative;
    width: 100%;
    height: 2.75rem;
    background: linear-gradient(to right, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    border: 1px solid #e2e8f0;
}

.response-bar {
    height: 100%;
    position: relative;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.human-bar {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.model-bar {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
}

.percentage-label {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.85rem;
    font-weight: 700;
    z-index: 2;
    pointer-events: none;
    color: rgba(0, 0, 0, 0.75);
    text-shadow: 
        -1px -1px 0 rgba(255, 255, 255, 0.9),
        1px -1px 0 rgba(255, 255, 255, 0.9),
        -1px 1px 0 rgba(255, 255, 255, 0.9),
        1px 1px 0 rgba(255, 255, 255, 0.9);
}

/* Override for human bar to keep white text */
.human-cell .percentage-label {
    color: white;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Responsive table */
@media (max-width: 1200px) {
    .response-table {
        font-size: 0.9rem;
    }
    
    .response-table th,
    .response-table td {
        padding: 0.75rem 0.5rem;
    }
    
    .bar-container {
        height: 2rem;
    }
    
    .percentage-label {
        font-size: 0.75rem;
    }
}

@media (max-width: 768px) {
    .response-table th.option-col {
        width: 40%;
    }
    
    .option-text {
        font-size: 0.85rem;
    }
}

.no-results {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Question Badges Container */
.question-badges {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Distribution Header */
.distribution-header {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.distribution-header span:first-child {
    color: var(--primary-color);
}

.distribution-header span:last-child {
    color: var(--accent-color);
}

/* Improved Controls Panel for 6 filters */
.controls-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.chart-container {
    margin-top: 1rem;
    max-height: 300px;
}

/* ===========================
   Datasets Page
   =========================== */
.datasets-container {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

.dataset-categories {
    margin: 3rem 0;
}

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

.category-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.category-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.category-icon.decision-making {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.category-icon.self-assessment {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.category-icon.judgment {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.category-icon.problem-solving {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.category-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.dataset-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
    justify-content: center;
}

.tag {
    background-color: var(--light-bg);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-color);
}

.geographic-coverage {
    margin: 3rem 0;
}

.geo-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.geo-stat {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
}

.geo-stat i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.geo-stat h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.geo-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.geo-detail-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
}

.geo-detail-card h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.geo-detail-card ul {
    list-style: disc;
    padding-left: 1.5rem;
}

.geo-detail-card li {
    padding: 0.25rem 0;
}

.datasets-table-container {
    overflow-x: auto;
    background: white;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
}

.datasets-table {
    width: 100%;
    border-collapse: collapse;
}

.datasets-table th,
.datasets-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.datasets-table th {
    background-color: var(--light-bg);
    font-weight: 700;
    color: var(--text-primary);
}

.datasets-table tr:hover {
    background-color: var(--light-bg);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.badge.decision-making {
    background-color: #764ba2;
}

.badge.self-assessment {
    background-color: #f5576c;
}

.badge.judgment {
    background-color: #00f2fe;
}

.badge.problem-solving {
    background-color: #38f9d7;
}

.table-note {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.data-format {
    margin: 3rem 0;
}

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

.format-card {
    background: white;
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
}

.format-card code {
    display: block;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

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

.download-section {
    margin: 3rem 0;
}

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

.download-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.download-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.download-card h3 {
    margin-bottom: 1rem;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero {
        padding: 4rem 0 3rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 1.5rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        gap: 0.75rem;
        font-size: 0.9rem;
    }
    
    .findings-grid,
    .properties-grid,
    .splits-container {
        grid-template-columns: 1fr;
    }
    
    .controls-panel {
        grid-template-columns: 1fr;
    }
    
    .pagination-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .visual-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-visual {
        flex-direction: column;
        gap: 2rem;
    }
    
    .vs-divider {
        transform: rotate(90deg);
    }
}

/* ===========================
   Overview Visual Section (NEW - replaces teaser)
   =========================== */
.overview-visual {
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 50%, #e0e7ff 100%);
    padding: 5rem 0;
    border-bottom: 2px solid var(--border-color);
}

.visual-grid {
    display: grid;
    /* make visual columns wider so the left column (visuals) has more room */
    grid-template-columns: repeat(auto-fit, minmax(460px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

/* On very wide screens, keep the first two columns flexible and make the third column wider so the comparison visual can sit on the first row */
@media (min-width: 1200px) {
    .visual-grid {
        grid-template-columns: 1fr 1fr 520px;
    }
}

.visual-card {
    background: white;
    padding: 2.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    border-top: 5px solid var(--primary-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.visual-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.visual-card h3 {
    color: var(--primary-color);
    margin-bottom: 1.25rem;
    font-size: 1.35rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.visual-card h3 i {
    font-size: 1.75rem;
}

.visual-card p {
    line-height: 1.7;
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Dataset Tags */
.dataset-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 1.25rem;
}

.tag {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 0.4rem 0.9rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s;
}

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

.tag-more {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #475569 100%);
    color: white;
    padding: 0.4rem 0.9rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-style: italic;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

/* Example Question Box */
.example-question {
    margin-top: 1.25rem;
}

.question-box {
    background: linear-gradient(to bottom, #f8fafc 0%, #ffffff 100%);
    border: 2px solid #cbd5e1;
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.question-text {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.question-prompt {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 1.25rem;
    font-weight: 600;
}

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

.option {
    background: white;
    padding: 1rem 1.25rem;
    border-radius: 0.5rem;
    border: 2px solid #e2e8f0;
    font-size: 1rem;
    transition: all 0.2s;
    cursor: pointer;
}

.option:hover {
    border-color: var(--primary-color);
    background: #f8fafc;
}

.option strong {
    color: var(--primary-color);
    margin-right: 0.5rem;
    font-size: 1.1rem;
}

.caption {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
    text-align: center;
}

/* Comparison Visual */
.comparison-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 2rem;
    padding: 1rem;
    background: linear-gradient(to bottom, #ffffff 0%, #f8fafc 100%);
    border-radius: 0.75rem;
    border: 2px solid #e2e8f0;
    overflow: visible; /* avoid scrollbars; we will ensure inner items fit via flex */
}

.comparison-group {
    /* allow cards to shrink so both can appear on a single screen without scroll */
    flex: 1 1 220px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: white;
    border-radius: 0.5rem;
    border: 1px solid #e2e8f0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    min-width: 160px;
    max-width: 420px;
    box-sizing: border-box;
}

.group-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-align: center;
}

.group-avatars {
    display: flex;
    justify-content: center;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
    flex-wrap: nowrap;
}

.avatar {
    font-size: 1.75rem;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    flex-shrink: 0;
}

.group-icon {
    margin-bottom: 1.25rem;
    font-size: 3rem;
    color: var(--primary-color);
}

.mini-bars {
    width: 100%;
}

.mini-bar {
    height: 3.5rem;
    width: 100%;
    display: flex;
    flex-direction: row;
    background: #e2e8f0;
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    margin-bottom: 1rem;
    box-sizing: border-box;
}

/* Responsive tweaks for small screens */
@media (max-width: 640px) {
    .comparison-visual {
        gap: 1rem;
        padding: 1rem;
    }
    .comparison-group {
        padding: 1rem;
        min-width: 180px;
        max-width: 240px;
    }
    .mini-bar {
        height: 3rem;
        border-radius: 0.5rem;
    }
    .avatar { font-size: 1.4rem; }
    .group-icon { font-size: 2.25rem; }
}

/* Stack the comparison groups vertically on slightly larger small screens to avoid clipping */
@media (max-width: 720px) {
    .comparison-visual {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
        padding: 1rem;
        overflow-x: hidden; /* no horizontal scroll when stacked */
    }
    .comparison-group {
        width: 100%;
        max-width: none;
        min-width: 0;
    }
    .vs-divider { display: none; }
}

.bar-section {
    height: 100%;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
}

.bar-human-a {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.bar-human-b {
    background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
}

.bar-model-a {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
}

.bar-model-b {
    background: linear-gradient(135deg, #94a3b8 0%, #64748b 100%);
}

.bar-labels {
    display: flex;
    justify-content: space-between;
    padding: 0 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.vs-divider {
    font-weight: 800;
    font-size: 2rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 0 0.5rem;
    height: 2.5rem;
    line-height: 2.5rem;
    background: transparent;
    align-self: center;
}

.comparison-note {
    margin-top: 1.5rem;
    padding: 1rem;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.comparison-note i {
    color: var(--primary-color);
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .comparison-visual {
        flex-direction: column;
        gap: 1.5rem;
        padding: 1.5rem 1rem;
    }
    
    .vs-divider {
        transform: rotate(90deg);
    }
    
    .comparison-group {
        width: 100%;
        max-width: 280px;
    }
    
    .avatar {
        font-size: 1.5rem;
    }
}

/* ===========================
   Old Teaser Section (keeping for backward compatibility)
   =========================== */
.teaser-section {
    background-color: var(--light-bg);
    padding: 3rem 0;
}

.teaser-section h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.teaser-section p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.teaser-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.teaser-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.teaser-meta {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.teaser-question {
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.teaser-stats {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    background-color: var(--light-bg);
    padding: 0.5rem;
    border-radius: 4px;
}