/* ==========================================
   Impute AI Landing Page Styles
   Enterprise-grade design system
   ========================================== */

/* CSS Variables */
:root {
    /* Colors - Enterprise-grade palette */
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --bg-card: #1a1f2e;
    
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    
    --border: #374151;
    --border-light: #4b5563;
    
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

/* ==========================================
   Reset & Base Styles
   ========================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==========================================
   Typography
   ========================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

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

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================
   Navigation
   ========================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
}

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

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary-light);
}

.btn-primary-nav {
    background: var(--gradient-primary);
    color: white !important;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 8px;
    font-weight: 600;
}

.btn-primary-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ==========================================
   Hero Section
   ========================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-3xl) 0;
    margin-top: 70px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(124, 58, 237, 0.15) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.3);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-xl) 0;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

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

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* ==========================================
   Buttons
   ========================================== */

.btn-primary, .btn-secondary, .btn-demo, .btn-send {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-light);
}

.btn-secondary:hover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    transform: translateY(-3px);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

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

.btn-demo:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
}

.btn-send {
    background: var(--primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
}

.btn-send:hover {
    background: var(--primary-dark);
}

/* ==========================================
   Sections
   ========================================== */

.section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-badge {
    display: inline-block;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.3);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-md);
}

/* ==========================================
   Problem Section
   ========================================== */

.problem-section {
    background: var(--bg-secondary);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.problem-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-xl);
    transition: var(--transition);
}

.problem-card:hover {
    transform: translateY(-5px);
    border-color: var(--danger);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.problem-icon {
    width: 64px;
    height: 64px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--danger);
    margin-bottom: var(--spacing-md);
}

.problem-card h3 {
    margin-bottom: var(--spacing-md);
}

.problem-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.problem-stat {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    display: inline-block;
}

.insight-box {
    background: var(--gradient-accent);
    border-radius: 16px;
    padding: var(--spacing-xl);
    display: flex;
    gap: var(--spacing-md);
    align-items: start;
}

.insight-box i {
    font-size: 2rem;
    color: white;
    flex-shrink: 0;
}

.insight-box div {
    color: white;
    line-height: 1.7;
}

/* ==========================================
   Solution Section
   ========================================== */

.solution-pillars {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.pillar {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-xl);
    transition: var(--transition);
    position: relative;
}

.pillar:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.2);
}

.pillar-highlight {
    border: 2px solid var(--primary);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
}

.pillar-number {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.05);
}

.pillar-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin-bottom: var(--spacing-md);
}

.pillar h3 {
    margin-bottom: var(--spacing-md);
}

.pillar p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.pillar-features {
    list-style: none;
}

.pillar-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.pillar-features i {
    color: var(--success);
}

/* ==========================================
   Demo Section
   ========================================== */

.demo-section {
    background: var(--bg-secondary);
}

.demo-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
}

.demo-nav {
    display: flex;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
}

.demo-nav-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.demo-nav-btn:hover {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-light);
}

.demo-nav-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary);
}

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

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

.demo-content {
    min-height: 500px;
}

/* Demo: Imputation */
.demo-before-after {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.demo-half h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.demo-half h3 i {
    font-size: 1.5rem;
}

.demo-half h3 .fa-times-circle {
    color: var(--danger);
}

.demo-half h3 .fa-check-circle {
    color: var(--success);
}

.data-table {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.data-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table th {
    background: var(--bg-secondary);
    padding: var(--spacing-sm);
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border);
}

.data-table td {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.missing-field {
    color: var(--danger);
    font-weight: 600;
    font-family: var(--font-mono);
}

.imputed-field {
    color: var(--success);
    font-weight: 600;
    background: rgba(16, 185, 129, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
}

.data-quality-bar {
    margin-top: var(--spacing-md);
}

.quality-label {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.quality-bad {
    color: var(--danger);
}

.quality-good {
    color: var(--success);
}

.progress-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 1s ease;
}

.progress-fill.bad {
    background: var(--danger);
}

.progress-fill.good {
    background: var(--success);
}

.narrative-box {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-md);
    font-size: 0.875rem;
}

.narrative-box strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.narrative-box p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-style: italic;
    margin: 0;
}

.ml-pipeline {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-md);
}

.ml-pipeline h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.pipeline-steps {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.pipeline-step {
    flex: 1;
    background: var(--gradient-primary);
    padding: var(--spacing-sm);
    border-radius: 8px;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.3;
    color: white;
}

.pipeline-steps i {
    color: var(--text-muted);
    font-size: 1rem;
}

.demo-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl) 0;
}

.demo-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Demo: Ontology */
.ontology-builder {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.ontology-left h3,
.ontology-right h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.input-form {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.input-form label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    font-size: 0.875rem;
}

.input-form textarea {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--spacing-sm);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.875rem;
    resize: vertical;
    margin-bottom: var(--spacing-md);
}

.input-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.suggestions-box {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-md);
}

.suggestions-box h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.suggestion-item {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.suggestion-item:last-of-type {
    border-bottom: none;
}

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

.confidence {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
}

.suggestion-options {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.suggestion-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.suggestion-btn:hover {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary);
    color: var(--primary-light);
}

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

.graph-container {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#graph-svg {
    max-width: 100%;
    height: 100%;
}

.graph-legend {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

.legend-color.process {
    background: #3b82f6;
}

.legend-color.subprocess {
    background: #8b5cf6;
}

.legend-color.defect {
    background: #ef4444;
}

.legend-color.root-cause {
    background: #f59e0b;
}

/* Demo: Copilot */
.copilot-interface {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 600px;
}

.copilot-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

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

.copilot-header h3 {
    flex: 1;
    margin: 0;
    font-size: 1.125rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--success);
}

.status-indicator i {
    font-size: 0.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.chat-message {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    animation: slideIn 0.3s ease;
}

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

.message-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: white;
}

.chat-message.user .message-avatar {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

.message-content {
    flex: 1;
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.message-content strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
}

.message-content p {
    margin: var(--spacing-xs) 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.message-content ul {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    color: var(--text-secondary);
}

.message-content li {
    margin: var(--spacing-xs) 0;
}

.message-content em {
    color: var(--primary-light);
}

.chat-input-container {
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
    padding: var(--spacing-md);
}

.quick-questions {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.quick-q {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.quick-q:hover {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary);
    color: var(--primary-light);
}

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

.input-group input {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
}

/* ==========================================
   Platform Features
   ========================================== */

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-md);
}

.feature-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* ==========================================
   ROI Section
   ========================================== */

.roi-section {
    background: var(--bg-secondary);
}

.roi-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.roi-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
}

.roi-card:hover {
    transform: translateY(-5px);
    border-color: var(--success);
    box-shadow: 0 20px 40px rgba(16, 185, 129, 0.2);
}

.roi-icon {
    width: 64px;
    height: 64px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--success);
    margin: 0 auto var(--spacing-md);
}

.roi-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--success);
    margin-bottom: var(--spacing-xs);
}

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

.roi-detail {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.pricing-preview {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: var(--spacing-2xl);
}

.pricing-preview h3 {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.pricing-tiers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.pricing-tier {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-xl);
    transition: var(--transition);
    position: relative;
}

.pricing-tier:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.pricing-tier.featured {
    border: 2px solid var(--primary);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
}

.tier-badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.tier-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.tier-price {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-light);
    margin-bottom: var(--spacing-lg);
}

.tier-price span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
}

.tier-features {
    list-style: none;
}

.tier-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.tier-features i {
    color: var(--success);
}

/* ==========================================
   Enterprise Systems Section
   ========================================== */

.enterprise-systems-section {
    background: var(--bg-secondary);
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.system-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-xl);
    transition: var(--transition);
}

.system-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.2);
}

.system-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin: 0 0 var(--spacing-md);
}

.system-card h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

.system-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.system-card p:last-child {
    margin-bottom: 0;
}

.system-card strong {
    color: var(--primary-light);
    font-weight: 600;
    font-size: 0.875rem;
}

.integration-note {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    border-left: 4px solid var(--accent);
    border-radius: 12px;
    padding: var(--spacing-xl);
    display: flex;
    gap: var(--spacing-md);
    align-items: start;
}

.integration-note i {
    font-size: 2rem;
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 4px;
}

.integration-note p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

.integration-note strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ==========================================
   Use Cases
   ========================================== */

.use-cases {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.use-case {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
}

.use-case:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(6, 182, 212, 0.2);
}

.use-case-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    margin: 0 auto var(--spacing-md);
}

.use-case h3 {
    margin-bottom: var(--spacing-sm);
}

.use-case p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.use-case-stat {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    background: rgba(6, 182, 212, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    display: inline-block;
}

/* ==========================================
   Competitive Section
   ========================================== */

.competitive-section {
    background: var(--bg-secondary);
}

.comparison-table {
    overflow-x: auto;
    margin-bottom: var(--spacing-2xl);
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md);
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.comparison-table th {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.comparison-table th.highlight,
.comparison-table td.highlight {
    background: var(--gradient-primary);
    color: white;
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
    font-weight: 600;
}

.comparison-table .fa-check {
    color: var(--success);
    font-size: 1.25rem;
}

.comparison-table .fa-times {
    color: var(--danger);
    font-size: 1.25rem;
}

.comparison-table .fa-minus {
    color: var(--warning);
    font-size: 1.25rem;
}

.moat-statement {
    background: var(--gradient-primary);
    border-radius: 16px;
    padding: var(--spacing-xl);
    display: flex;
    gap: var(--spacing-md);
    align-items: start;
}

.moat-statement i {
    font-size: 2rem;
    color: white;
    flex-shrink: 0;
}

.moat-statement div {
    color: white;
    line-height: 1.7;
}

/* ==========================================
   Founder Section
   ========================================== */

.founder-section {
    background: var(--bg-primary);
}

.founder-spotlight {
    max-width: 1000px;
    margin: 0 auto;
}

.founder-content {
    margin-bottom: var(--spacing-2xl);
}

.founder-text h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.founder-title {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    font-weight: 500;
}

.founder-story {
    margin-bottom: var(--spacing-2xl);
}

.founder-story p {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.founder-story strong {
    color: var(--text-primary);
    font-weight: 600;
}

.founder-story em {
    color: var(--primary-light);
    font-style: italic;
}

.founder-vision {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    border-left: 4px solid var(--primary);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-bottom: var(--spacing-2xl);
}

.founder-vision h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-light);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.founder-vision p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

.founder-highlights {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.highlight-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: start;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: var(--transition);
}

.highlight-item:hover {
    border-color: var(--primary);
    transform: translateX(5px);
}

.highlight-item i {
    font-size: 1.5rem;
    color: var(--primary);
    margin-top: 4px;
}

.highlight-item strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 4px;
    font-size: 1rem;
}

.highlight-item span {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.5;
}

.founder-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.founder-quote {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-2xl);
    position: relative;
    margin-top: var(--spacing-xl);
}

.founder-quote i {
    font-size: 3rem;
    color: var(--primary);
    opacity: 0.2;
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
}

.founder-quote blockquote {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--text-primary);
    font-style: italic;
    margin: 0 0 var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.quote-attribution {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    padding-left: var(--spacing-xl);
}

/* ==========================================
   Credentials Section
   ========================================== */

.credentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.credential-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
}

.credential-item:hover {
    transform: translateY(-5px);
    border-color: var(--secondary);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.2);
}

.credential-item i {
    font-size: 3rem;
    color: var(--secondary);
    margin-bottom: var(--spacing-md);
}

.credential-item h3 {
    margin-bottom: var(--spacing-md);
}

.credential-item p {
    color: var(--text-secondary);
    margin: 0;
}

/* ==========================================
   CTA Section
   ========================================== */

.cta-section {
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.1) 0%, transparent 60%);
    z-index: 0;
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
}

.contact-info {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
}

.contact-item i {
    color: var(--primary);
}

/* ==========================================
   Footer
   ========================================== */

.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
}

.footer-column h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--text-secondary);
}

.footer-column a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ==========================================
   Responsive Design
   ========================================== */

@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .demo-before-after,
    .ontology-builder {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .demo-nav {
        flex-direction: column;
    }
    
    .copilot-interface {
        height: 500px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .contact-info {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
}