/* ============================================================================
   UM-Model 1 Styles - Redesigned Layout
   Minimal Black & White Design
   Created by: Aniket Tapre | Unified Machines
   ============================================================================ */

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

:root {
    --black: #000000;
    --white: #FFFFFF;
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #E5E5E5;
    --gray-300: #D4D4D4;
    --gray-400: #A3A3A3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Courier New', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-sans);
    background: var(--white);
    color: var(--black);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--white);
    border-bottom: 2px solid var(--black);
}

.nav-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-brand i {
    width: 36px;
    height: 36px;
    stroke-width: 1.5;
}

.nav-text {
    display: flex;
    flex-direction: column;
}

.nav-company {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.nav-model {
    font-size: 1.25rem;
    font-weight: 300;
    font-family: var(--font-mono);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
    text-decoration: none;
    transition: var(--transition);
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
}

.nav-link:hover {
    color: var(--black);
    border-bottom-color: var(--black);
}

.nav-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    font-size: 0.75rem;
    color: var(--gray-600);
}

.nav-date {
    font-family: var(--font-mono);
}

/* Hero */
.hero {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-300);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--black);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: 4rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.7;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto var(--spacing-3xl);
}

.stat {
    padding: var(--spacing-lg);
    border: 2px solid var(--black);
    background: var(--white);
}

.stat-value {
    font-size: 3rem;
    font-weight: 300;
    font-family: var(--font-mono);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-ladder {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    border: 2px solid var(--black);
    background: var(--gray-50);
}

.ladder-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.ladder-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.ladder-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--white);
    border: 2px solid var(--black);
    flex: 1;
}

.ladder-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--black);
    color: var(--white);
    font-weight: 700;
    font-family: var(--font-mono);
    flex-shrink: 0;
}

.ladder-content {
    flex: 1;
}

.ladder-name {
    font-weight: 600;
    margin-bottom: 2px;
}

.ladder-desc {
    font-size: 0.875rem;
    font-family: var(--font-mono);
    color: var(--gray-600);
}

.ladder-arrow {
    font-size: 1.5rem;
    font-weight: 300;
}

.ladder-note {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--white);
    border: 1px solid var(--gray-300);
    font-size: 0.875rem;
}

.ladder-note i {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: 3rem;
    font-weight: 300;
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
}

/* Demo Section */
.demo-section {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-50);
}

.demo-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.demo-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--spacing-xl);
}

.demo-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.sidebar-section {
    background: var(--white);
    border: 2px solid var(--black);
    padding: var(--spacing-lg);
}

.sidebar-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.control-group:last-child {
    margin-bottom: 0;
}

.control-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.control-group input,
.control-group select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--black);
    background: var(--white);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.control-group input:focus,
.control-group select:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--gray-300);
}

.arrow-icon {
    text-align: center;
    margin: var(--spacing-xs) 0;
}

.arrow-icon i {
    width: 20px;
    height: 20px;
}

.stats-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--gray-50);
    border: 1px solid var(--gray-300);
}

.stat-item i {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.stat-item > div {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.stat-item .stat-label {
    font-size: 0.7rem;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-item .stat-value {
    font-size: 1.5rem;
    font-weight: 300;
    font-family: var(--font-mono);
}

/* Demo Main */
.demo-main {
    background: var(--white);
    border: 2px solid var(--black);
}

.demo-tabs {
    display: flex;
    border-bottom: 2px solid var(--black);
}

.demo-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--white);
    border: none;
    border-right: 1px solid var(--gray-300);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-600);
    transition: var(--transition);
}

.demo-tab:last-child {
    border-right: none;
}

.demo-tab i {
    width: 18px;
    height: 18px;
}

.demo-tab:hover {
    background: var(--gray-50);
    color: var(--black);
}

.demo-tab.active {
    background: var(--black);
    color: var(--white);
}

.demo-content {
    min-height: 600px;
}

.demo-panel {
    display: none;
    padding: var(--spacing-lg);
}

.demo-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Canvas */
#causal-graph {
    width: 100%;
    height: 550px;
    cursor: grab;
    border: 1px solid var(--gray-300);
}

#causal-graph:active {
    cursor: grabbing;
}

/* Counterfactual Layout */
.cf-layout {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: var(--spacing-xl);
}

.cf-setup,
.cf-results {
    border: 2px solid var(--black);
    padding: var(--spacing-lg);
    background: var(--white);
}

.cf-setup h4,
.cf-results h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--black);
    background: var(--white);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--black);
    color: var(--white);
    border: 2px solid var(--black);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.btn-primary i {
    width: 16px;
    height: 16px;
}

.btn-large {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 0.875rem;
}

/* Counterfactual Steps */
.cf-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.cf-step {
    border: 2px solid var(--black);
    background: var(--white);
}

.step-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--black);
    color: var(--white);
}

.step-number {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    color: var(--black);
    font-weight: 700;
    font-family: var(--font-mono);
    flex-shrink: 0;
}

.step-title {
    font-weight: 600;
    font-size: 1rem;
}

.step-desc {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    color: var(--gray-600);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-300);
}

.step-result {
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    min-height: 80px;
    background: var(--white);
}

/* Intervention Layout */
.int-layout {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: var(--spacing-xl);
}

.int-setup,
.int-results {
    border: 2px solid var(--black);
    padding: var(--spacing-lg);
    background: var(--white);
}

.int-setup h4,
.int-results h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.plan-card {
    border: 2px solid var(--black);
    background: var(--white);
    min-height: 300px;
}

.plan-content {
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

/* Examples Section */
.examples-section {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.examples-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.examples-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.example-card {
    border: 2px solid var(--black);
    background: var(--white);
    padding: var(--spacing-xl);
}

.example-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--black);
}

.example-header i {
    width: 40px;
    height: 40px;
    stroke-width: 1.5;
}

.example-header h3 {
    font-size: 1.75rem;
    font-weight: 600;
}

.example-scenario {
    padding: var(--spacing-md);
    background: var(--gray-50);
    border: 1px solid var(--gray-300);
    margin-bottom: var(--spacing-lg);
    font-size: 1rem;
}

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

.comparison-item {
    border: 2px solid var(--black);
    background: var(--white);
}

.comparison-item.wrong {
    border-color: var(--gray-400);
}

.comparison-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.comparison-item.wrong .comparison-label {
    background: var(--gray-200);
    color: var(--gray-700);
}

.comparison-item.correct .comparison-label {
    background: var(--black);
    color: var(--white);
}

.comparison-label i {
    width: 20px;
    height: 20px;
}

.comparison-content {
    padding: var(--spacing-lg);
}

.comparison-content p {
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    line-height: 1.7;
}

.comparison-content strong {
    font-weight: 600;
}

.comparison-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gray-50);
    border: 1px solid var(--gray-300);
    margin-top: var(--spacing-md);
}

.result-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-value {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.example-impact {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--black);
    color: var(--white);
    font-size: 0.875rem;
}

.example-impact i {
    width: 20px;
    height: 20px;
}

/* Examples Summary */
.examples-summary {
    padding: var(--spacing-xl);
    border: 2px solid var(--black);
    background: var(--gray-50);
}

.examples-summary h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.summary-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--white);
    border: 2px solid var(--black);
}

.summary-item i {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
    stroke-width: 1.5;
}

.summary-item strong {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.summary-item p {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* Algorithms Section */
.algorithms-section {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-50);
}

.algorithms-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.algorithms-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.algorithm-card {
    border: 2px solid var(--black);
    padding: var(--spacing-xl);
    background: var(--white);
    position: relative;
    transition: var(--transition);
}

.algorithm-card:hover {
    transform: translateY(-4px);
    box-shadow: 8px 8px 0 var(--black);
}

.algorithm-number {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 3rem;
    font-weight: 300;
    font-family: var(--font-mono);
    color: var(--gray-200);
    line-height: 1;
}

.algorithm-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--black);
    background: var(--white);
    margin-bottom: var(--spacing-md);
}

.algorithm-icon i {
    width: 36px;
    height: 36px;
    stroke-width: 1.5;
}

.algorithm-card h3 {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    margin-bottom: var(--spacing-xs);
}

.algorithm-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--gray-600);
}

.algorithm-card p {
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.algorithm-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--black);
    color: var(--white);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Audio Section */
.audio-section {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-300);
}

.audio-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.audio-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    justify-content: center;
}

.audio-header i {
    width: 32px;
    height: 32px;
}

.audio-header h2 {
    font-size: 2.5rem;
    font-weight: 300;
}

.audio-content {
    border: 2px solid var(--black);
    background: var(--white);
    padding: var(--spacing-xl);
}

.audio-script {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--gray-800);
}

.audio-script p {
    margin-bottom: var(--spacing-md);
}

.audio-script strong {
    color: var(--black);
    font-weight: 600;
}

.audio-note {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.audio-note i {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.audio-note code {
    font-family: var(--font-mono);
    background: var(--white);
    padding: 2px 6px;
    border: 1px solid var(--gray-300);
}

/* Simulations Page Styles */
.simulations-section {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.simulations-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.simulation-card {
    border: 2px solid var(--black);
    background: var(--white);
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
}

.sim-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    background: var(--gray-50);
    border-bottom: 2px solid var(--black);
}

.sim-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--black);
    color: var(--white);
}

.sim-icon i {
    width: 32px;
    height: 32px;
}

.sim-title-group h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.sim-title-group p {
    font-size: 1rem;
    color: var(--gray-600);
}

.sim-content {
    padding: var(--spacing-xl);
}

.sim-scenario {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border: 1px solid var(--gray-300);
}

.sim-scenario h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.sim-scenario p {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--gray-700);
}

.sim-data {
    display: grid;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.data-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm);
    background: var(--white);
    border: 1px solid var(--gray-300);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.data-label {
    color: var(--gray-600);
}

.data-value {
    font-weight: 600;
    color: var(--black);
}

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

.approach-card {
    border: 2px solid var(--black);
    padding: var(--spacing-lg);
}

.approach-card.genai {
    background: var(--gray-100);
}

.approach-card.um {
    background: var(--white);
}

.approach-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--black);
}

.approach-header i {
    width: 24px;
    height: 24px;
}

.approach-header h4 {
    font-size: 1rem;
    font-weight: 600;
}

.approach-method,
.approach-conclusion,
.approach-problem {
    margin-bottom: var(--spacing-md);
}

.approach-method strong,
.approach-conclusion strong,
.approach-problem strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.approach-method pre {
    background: var(--white);
    border: 1px solid var(--gray-300);
    padding: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    overflow-x: auto;
    margin-top: var(--spacing-xs);
}

.approach-result {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--white);
    border: 2px solid var(--black);
    font-size: 0.875rem;
    font-weight: 600;
}

.approach-result.failure {
    border-color: var(--gray-600);
    color: var(--gray-700);
}

.approach-result.success {
    border-color: var(--black);
    color: var(--black);
}

.approach-result i {
    width: 20px;
    height: 20px;
}

.sim-interactive {
    padding: var(--spacing-xl);
    background: var(--gray-50);
    border: 2px solid var(--black);
    margin-bottom: var(--spacing-lg);
}

.sim-interactive h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.sim-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

.sim-control label {
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sim-control-value {
    font-family: var(--font-mono);
    color: var(--gray-600);
}

.sim-control input[type="range"] {
    width: 100%;
    height: 4px;
    background: var(--gray-300);
    outline: none;
    -webkit-appearance: none;
}

.sim-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--black);
    cursor: pointer;
    border: 2px solid var(--black);
}

.sim-control input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--black);
    cursor: pointer;
    border: 2px solid var(--black);
}

.sim-control select {
    padding: var(--spacing-sm);
    border: 2px solid var(--black);
    background: var(--white);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.sim-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.sim-toggle input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.sim-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.sim-result-card {
    padding: var(--spacing-lg);
    border: 2px solid var(--black);
    background: var(--white);
    text-align: center;
}

.sim-result-card h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-600);
}

.sim-result-value {
    font-size: 2.5rem;
    font-weight: 300;
    font-family: var(--font-mono);
    color: var(--black);
}

.sim-result-card.genai .sim-result-value {
    color: var(--gray-500);
}

.sim-result-card.actual {
    background: var(--gray-50);
}

.sim-explanation {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--white);
    border: 2px solid var(--black);
}

.sim-explanation h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.sim-explanation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.explanation-item {
    padding: var(--spacing-md);
    background: var(--gray-50);
    border: 1px solid var(--gray-300);
}

.explanation-item h5 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.explanation-item i {
    width: 18px;
    height: 18px;
}

.explanation-item p {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--gray-700);
}

/* Footer */
.footer {
    background: var(--black);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 2px solid var(--black);
}

.footer-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--gray-300);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-brand i {
    width: 48px;
    height: 48px;
    stroke-width: 1.5;
}

.footer-company {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--gray-600);
}

.footer-info {
    display: flex;
    gap: var(--spacing-2xl);
}

.footer-item {
    display: flex;
    flex-direction: column;
}

.footer-item strong {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.footer-item span {
    font-size: 0.875rem;
    color: var(--gray-600);
}

.footer-bottom {
    text-align: center;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.footer-bottom p {
    margin-bottom: 4px;
}

/* Checkboxes */
input[type="checkbox"] {
    width: 18px;
    height: 18px;
    border: 2px solid var(--black);
    cursor: pointer;
    margin: 0;
}

#cf-targets {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--gray-50);
    border: 1px solid var(--gray-300);
}

.target-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
}

.target-checkbox label {
    cursor: pointer;
    font-size: 0.875rem;
    margin: 0;
    font-weight: 400;
    text-transform: none;
    letter-spacing: normal;
}

/* Responsive */
@media (max-width: 1200px) {
    .demo-layout {
        grid-template-columns: 1fr;
    }
    
    .demo-sidebar {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
    
    .cf-layout,
    .int-layout {
        grid-template-columns: 1fr;
    }
    
    .algorithms-grid {
        grid-template-columns: 1fr;
    }
    
    .summary-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .ladder-steps {
        flex-direction: column;
    }
    
    .ladder-arrow {
        transform: rotate(90deg);
    }
    
    .nav-links {
        display: none;
    }
    
    .comparison {
        grid-template-columns: 1fr;
    }
    
    .demo-sidebar {
        grid-template-columns: 1fr;
    }
    
    .summary-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background: var(--black);
    color: var(--white);
}