/**
 * TFL AI Landing Premium Component Library v1.0
 * Premium "Legora-Level" Design System
 *
 * Typography: Outfit (headlines) + DM Sans (body) + JetBrains Mono (code)
 * Theme: Dark mode legal sophistication
 */

/* ==========================================================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ========================================================================== */

:root {
    /* Background Hierarchy */
    --bg-void: #1a1a1a;
    --bg-body: #222222;
    --bg-card: #2a2a2a;
    --bg-elevated: #333333;
    --bg-hover: #3a3a3a;

    /* Accent Colors */
    --accent-primary: #51afea;
    --accent-primary-rgb: 81, 175, 234;
    --accent-hover: #6bc0f5;
    --accent-glow: rgba(81, 175, 234, 0.15);
    --accent-glow-strong: rgba(81, 175, 234, 0.3);
    --accent-gold: #f5a623;
    --accent-gold-glow: rgba(245, 166, 35, 0.2);
    --accent-success: #4ade80;
    --accent-warning: #fbbf24;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a8a8a8;
    --text-tertiary: #6b6b6b;
    --text-muted: #525252;

    /* Borders */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.12);
    --border-accent: rgba(81, 175, 234, 0.3);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 30px rgba(81, 175, 234, 0.2);
    --shadow-glow-strong: 0 0 50px rgba(81, 175, 234, 0.3);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--accent-primary) 0%, #3d8ac7 100%);
    --gradient-dark: linear-gradient(180deg, var(--bg-void) 0%, var(--bg-body) 100%);
    --gradient-card: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
    --gradient-border: linear-gradient(135deg, rgba(81, 175, 234, 0.5) 0%, rgba(81, 175, 234, 0.1) 50%, rgba(81, 175, 234, 0.5) 100%);

    /* Typography */
    --font-display: 'Outfit', system-ui, -apple-system, sans-serif;
    --font-body: 'DM Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-Index Scale */
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;
}

/* ==========================================================================
   2. BASE TYPOGRAPHY
   ========================================================================== */

.ai-premium-page {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Headlines - Outfit */
.ai-headline,
.ai-premium-page h1,
.ai-premium-page h2,
.ai-premium-page h3 {
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--text-primary);
}

.ai-headline-xl {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.05;
}

.ai-headline-lg {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.1;
}

.ai-headline-md {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    line-height: 1.2;
}

.ai-headline-sm {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    line-height: 1.3;
}

/* Body Text - DM Sans */
.ai-body-lg {
    font-size: var(--text-lg);
    line-height: 1.7;
    color: var(--text-secondary);
}

.ai-body-base {
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-secondary);
}

.ai-body-sm {
    font-size: var(--text-sm);
    line-height: 1.5;
    color: var(--text-secondary);
}

/* Monospace */
.ai-mono {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

/* Text Accent */
.ai-text-accent {
    color: var(--accent-primary);
}

.ai-text-gold {
    color: var(--accent-gold);
}

.ai-text-muted {
    color: var(--text-muted);
}

/* Gradient Text */
.ai-text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   3. LAYOUT CONTAINERS
   ========================================================================== */

.ai-container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.ai-container-sm {
    max-width: 960px;
}

.ai-container-lg {
    max-width: 1440px;
}

.ai-section {
    padding: var(--space-20) 0;
}

.ai-section-lg {
    padding: var(--space-24) 0;
}

.ai-section-sm {
    padding: var(--space-12) 0;
}

/* Section Backgrounds */
.ai-section-void {
    background-color: var(--bg-void);
}

.ai-section-elevated {
    background-color: var(--bg-elevated);
}

.ai-section-gradient {
    background: var(--gradient-dark);
}

/* ==========================================================================
   4. BENTO GRID SYSTEM
   ========================================================================== */

.ai-bento-grid {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: repeat(12, 1fr);
}

/* Bento Cell Sizes */
.ai-bento-cell {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    overflow: hidden;
    transition: all var(--transition-base);
}

.ai-bento-cell:hover {
    border-color: var(--border-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Span Classes */
.ai-bento-span-1 { grid-column: span 1; }
.ai-bento-span-2 { grid-column: span 2; }
.ai-bento-span-3 { grid-column: span 3; }
.ai-bento-span-4 { grid-column: span 4; }
.ai-bento-span-5 { grid-column: span 5; }
.ai-bento-span-6 { grid-column: span 6; }
.ai-bento-span-7 { grid-column: span 7; }
.ai-bento-span-8 { grid-column: span 8; }
.ai-bento-span-12 { grid-column: span 12; }

.ai-bento-row-2 { grid-row: span 2; }

/* Responsive Bento */
@media (max-width: 1024px) {
    .ai-bento-span-8,
    .ai-bento-span-7,
    .ai-bento-span-6 { grid-column: span 12; }
    .ai-bento-span-5,
    .ai-bento-span-4 { grid-column: span 6; }
}

@media (max-width: 768px) {
    .ai-bento-grid {
        grid-template-columns: 1fr;
    }
    .ai-bento-cell {
        grid-column: span 1 !important;
    }
}

/* ==========================================================================
   5. GLASSMORPHISM CARDS
   ========================================================================== */

.ai-glass-card {
    background: rgba(42, 42, 42, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
}

.ai-glass-card-strong {
    background: rgba(42, 42, 42, 0.8);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
}

.ai-glass-card-accent {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
}

/* Gradient Border Card */
.ai-gradient-border-card {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
}

.ai-gradient-border-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 1px;
    background: var(--gradient-border);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

/* ==========================================================================
   6. BUTTONS
   ========================================================================== */

.ai-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-family: var(--font-body);
    font-weight: 500;
    font-size: var(--text-base);
    line-height: 1;
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

/* Primary Button */
.ai-btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-md), 0 0 20px rgba(var(--accent-primary-rgb), 0.3);
}

.ai-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 40px rgba(var(--accent-primary-rgb), 0.4);
}

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

/* Secondary Button */
.ai-btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
}

.ai-btn-secondary:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Ghost Button */
.ai-btn-ghost {
    background: transparent;
    color: var(--accent-primary);
    padding: var(--space-2) var(--space-4);
}

.ai-btn-ghost:hover {
    background: var(--accent-glow);
}

/* Button Sizes */
.ai-btn-sm {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-4);
}

.ai-btn-lg {
    font-size: var(--text-lg);
    padding: var(--space-5) var(--space-8);
}

.ai-btn-xl {
    font-size: var(--text-xl);
    padding: var(--space-6) var(--space-10);
    border-radius: var(--radius-xl);
}

/* Glow Animation Button */
.ai-btn-glow {
    animation: glowPulse 2s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { box-shadow: var(--shadow-md), 0 0 20px rgba(var(--accent-primary-rgb), 0.3); }
    50% { box-shadow: var(--shadow-lg), 0 0 40px rgba(var(--accent-primary-rgb), 0.5); }
}

/* ==========================================================================
   7. BADGES & TAGS
   ========================================================================== */

.ai-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    background: var(--accent-glow);
    color: var(--accent-primary);
    border: 1px solid var(--border-accent);
}

.ai-badge-success {
    background: rgba(74, 222, 128, 0.1);
    color: var(--accent-success);
    border-color: rgba(74, 222, 128, 0.3);
}

.ai-badge-gold {
    background: var(--accent-gold-glow);
    color: var(--accent-gold);
    border-color: rgba(245, 166, 35, 0.3);
}

.ai-badge-coming-soon {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border-color: var(--border-default);
}

/* Trust Badge */
.ai-trust-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.ai-trust-badge-icon {
    width: 20px;
    height: 20px;
    color: var(--accent-success);
}

/* ==========================================================================
   8. METRIC COUNTERS
   ========================================================================== */

.ai-metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
}

.ai-metric-card {
    text-align: center;
    padding: var(--space-8) var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.ai-metric-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.ai-metric-value {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 800;
    color: var(--accent-primary);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.ai-metric-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Animated Counter */
.ai-counter {
    display: inline-block;
}

.ai-counter[data-animate="true"] {
    animation: countUp 0.5s ease-out forwards;
}

@keyframes countUp {
    from { opacity: 0; transform: scale(0.5) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* ==========================================================================
   9. FEATURE CARDS
   ========================================================================== */

.ai-feature-card {
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.ai-feature-card:hover {
    border-color: var(--border-accent);
    background: var(--bg-elevated);
}

.ai-feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    color: var(--accent-primary);
}

.ai-feature-icon svg {
    width: 24px;
    height: 24px;
}

.ai-feature-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.ai-feature-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Feature List */
.ai-feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ai-feature-list-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.ai-feature-list-item:last-child {
    border-bottom: none;
}

.ai-feature-check {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(74, 222, 128, 0.1);
    border-radius: var(--radius-sm);
    color: var(--accent-success);
    margin-top: 2px;
}

/* ==========================================================================
   10. HERO SECTION
   ========================================================================== */

.ai-hero {
    padding: var(--space-24) 0 var(--space-16);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.ai-hero-badge-row {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.ai-hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-6);
}

.ai-hero-subtitle {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-8);
    line-height: 1.6;
}

.ai-hero-cta-row {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
    flex-wrap: wrap;
}

/* Hero Video/Demo Container */
.ai-hero-demo {
    max-width: 1180px;
    margin: 0 auto;
    position: relative;
}

.ai-hero-demo-wrapper {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    border: 1px solid var(--border-default);
    box-shadow: var(--shadow-xl), var(--shadow-glow-strong);
    background: var(--bg-card);
}

.ai-hero-demo-wrapper::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: var(--gradient-border);
    z-index: -1;
    opacity: 0.5;
}

.ai-hero-demo-placeholder {
   /* aspect-ratio: 16/9;*/
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
    color: var(--text-muted);
}

/* Trust Bar */
.ai-hero-trust-bar {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    margin-top: var(--space-10);
    flex-wrap: wrap;
}

/* ==========================================================================
   11. LOGO CAROUSEL
   ========================================================================== */

.ai-logo-carousel {
    padding: var(--space-12) 0;
    background: var(--bg-void);
    overflow: hidden;
}

.ai-logo-carousel-title {
    text-align: center;
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-8);
}

.ai-logo-carousel-track {
    display: flex;
    gap: var(--space-12);
    animation: logoScroll 30s linear infinite;
}

.ai-logo-carousel-item {
    flex-shrink: 0;
    opacity: 0.5;
    filter: grayscale(100%);
    transition: all var(--transition-base);
}

.ai-logo-carousel-item:hover {
    opacity: 1;
    filter: grayscale(0%);
}

@keyframes logoScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ==========================================================================
   12. TESTIMONIAL
   ========================================================================== */

.ai-testimonial {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-12);
}

.ai-testimonial-quote {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 500;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: var(--space-8);
    position: relative;
}

.ai-testimonial-quote::before {
    content: '"';
    font-size: 6rem;
    font-family: Georgia, serif;
    position: absolute;
    top: -3rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--accent-glow);
    opacity: 0.5;
    line-height: 1;
}

.ai-testimonial-author {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.ai-testimonial-role {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ==========================================================================
   13. PRICING TABLE
   ========================================================================== */

.ai-pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    max-width: 1000px;
    margin: 0 auto;
}

.ai-pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
}

.ai-pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.ai-pricing-card-featured {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    position: relative;
}

.ai-pricing-card-featured::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    background: var(--gradient-border);
    z-index: -1;
}

.ai-pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: var(--text-primary);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-full);
}

.ai-pricing-name {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.ai-pricing-price {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--accent-primary);
    margin-bottom: var(--space-1);
}

.ai-pricing-period {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-6);
}

.ai-pricing-features {
    flex: 1;
    margin-bottom: var(--space-6);
}

/* ==========================================================================
   14. FAQ ACCORDION
   ========================================================================== */

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

.ai-faq-item {
    border-bottom: 1px solid var(--border-default);
}

.ai-faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-6) 0;
    background: transparent;
    border: none;
    text-align: left;
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

.ai-faq-icon {
    width: 24px;
    height: 24px;
    color: var(--text-muted);
    transition: transform var(--transition-base);
}

.ai-faq-item[open] .ai-faq-icon {
    transform: rotate(45deg);
}

.ai-faq-answer {
    padding-bottom: var(--space-6);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================================================
   15. CTA SECTION
   ========================================================================== */

.ai-cta-section {
    padding: var(--space-24) 0;
    text-align: center;
}

.ai-cta-box {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--space-12);
    background: var(--bg-card);
    border-radius: var(--radius-2xl);
    position: relative;
    overflow: hidden;
}



.ai-cta-title {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
}

.ai-cta-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
}

/* ==========================================================================
   16. NAVIGATION
   ========================================================================== */

.ai-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    padding: var(--space-4) 0;
    background: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
}

.ai-nav-scrolled {
    padding: var(--space-3) 0;
    background: rgba(26, 26, 26, 0.95);
}

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

.ai-nav-logo {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.ai-nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.ai-nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.ai-nav-link:hover,
.ai-nav-link.active {
    color: var(--accent-primary);
}

.ai-nav-cta-group {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* Mobile Nav */
@media (max-width: 768px) {
    .ai-nav-links {
        display: none;
    }
}

/* ==========================================================================
   17. ALTERNATING SECTIONS (Left/Right)
   ========================================================================== */

.ai-split-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.ai-split-section-reverse {
    direction: rtl;
}

.ai-split-section-reverse > * {
    direction: ltr;
}

.ai-split-content {
    max-width: 500px;
}

.ai-split-visual {
    position: relative;
}

.ai-split-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-default);
    box-shadow: var(--shadow-lg);
}

@media (max-width: 1024px) {
    .ai-split-section {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    .ai-split-section-reverse {
        direction: ltr;
    }
    .ai-split-content {
        max-width: 100%;
    }
}

/* ==========================================================================
   18. USE CASE TABS
   ========================================================================== */

.ai-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-8);
    flex-wrap: wrap;
    justify-content: center;
}

.ai-tab {
    padding: var(--space-3) var(--space-5);
    background: transparent;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.ai-tab:hover {
    border-color: var(--border-strong);
    color: var(--text-primary);
}

.ai-tab.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.ai-tab-panel {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.ai-tab-panel.active {
    display: block;
}

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

/* ==========================================================================
   19. COMPLIANCE BADGES
   ========================================================================== */

.ai-compliance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
}

.ai-compliance-card {
    text-align: center;
    padding: var(--space-8);
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
}

.ai-compliance-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: var(--radius-lg);
    color: var(--accent-primary);
}

.ai-compliance-icon svg {
    width: 32px;
    height: 32px;
}

.ai-compliance-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
}

.ai-compliance-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ==========================================================================
   20. UTILITY CLASSES
   ========================================================================== */

/* Text Alignment */
.ai-text-center { text-align: center; }
.ai-text-left { text-align: left; }
.ai-text-right { text-align: right; }

/* Spacing */
.ai-mt-0 { margin-top: 0; }
.ai-mt-4 { margin-top: var(--space-4); }
.ai-mt-8 { margin-top: var(--space-8); }
.ai-mt-12 { margin-top: var(--space-12); }
.ai-mb-0 { margin-bottom: 0; }
.ai-mb-4 { margin-bottom: var(--space-4); }
.ai-mb-8 { margin-bottom: var(--space-8); }
.ai-mb-12 { margin-bottom: var(--space-12); }

/* Display */
.ai-hidden { display: none; }
.ai-block { display: block; }
.ai-flex { display: flex; }
.ai-grid { display: grid; }

/* Flex utilities */
.ai-flex-center { align-items: center; justify-content: center; }
.ai-flex-between { justify-content: space-between; }
.ai-flex-wrap { flex-wrap: wrap; }
.ai-gap-2 { gap: var(--space-2); }
.ai-gap-4 { gap: var(--space-4); }
.ai-gap-6 { gap: var(--space-6); }
.ai-gap-8 { gap: var(--space-8); }

/* Width */
.ai-w-full { width: 100%; }
.ai-max-w-md { max-width: 640px; }
.ai-max-w-lg { max-width: 800px; }
.ai-max-w-xl { max-width: 1000px; }

/* Visibility */
@media (max-width: 768px) {
    .ai-hide-mobile { display: none !important; }
}
@media (min-width: 769px) {
    .ai-hide-desktop { display: none !important; }
}

/* ==========================================================================
   21. HOW IT WORKS (3-Step)
   ========================================================================== */

.ai-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    position: relative;
}

.ai-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: calc(16.67% + 20px);
    right: calc(16.67% + 20px);
    height: 2px;
    background: var(--border-default);
    z-index: 0;
}

.ai-step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.ai-step-number {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 2px solid var(--border-default);
    border-radius: 50%;
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--accent-primary);
    transition: all var(--transition-base);
}

.ai-step:hover .ai-step-number {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    transform: scale(1.1);
}

.ai-step-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.ai-step-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .ai-steps {
        grid-template-columns: 1fr;
    }
    .ai-steps::before {
        display: none;
    }
}

/* ==========================================================================
   22. VIDEO PLACEHOLDER
   ========================================================================== */

.ai-video-placeholder {
    position: relative;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-video-play-btn {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-primary);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-glow-strong);
}

.ai-video-play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 60px rgba(var(--accent-primary-rgb), 0.5);
}

.ai-video-play-btn svg {
    width: 32px;
    height: 32px;
    margin-left: 4px;
}

/* ==========================================================================
   23. RESPONSIVE HELPERS
   ========================================================================== */

@media (max-width: 1280px) {
    .ai-container {
        padding: 0 var(--space-8);
    }
}

@media (max-width: 1024px) {
    .ai-section {
        padding: var(--space-16) 0;
    }
    .ai-section-lg {
        padding: var(--space-20) 0;
    }
}

@media (max-width: 768px) {
    :root {
        --space-20: 3rem;
        --space-24: 4rem;
    }

    .ai-container {
        padding: 0 var(--space-4);
    }

    .ai-hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .ai-hero-cta-row {
        flex-direction: column;
        align-items: center;
    }

    .ai-btn-xl {
        width: 100%;
        justify-content: center;
    }

    /* Hero Section Mobile */
    .ai-hero {
        padding: var(--space-12) 0 var(--space-8);
    }

    .ai-hero-badge-row {
        flex-direction: column;
        gap: var(--space-2);
        align-items: center;
    }

    .ai-hero-subtitle {
        font-size: var(--text-base);
        padding: 0 var(--space-2);
    }

    /* Trust bar */
    .ai-hero-trust-bar {
        flex-direction: column;
        gap: var(--space-3);
    }

    .ai-trust-badge {
        width: 100%;
        justify-content: center;
    }

    /* Metrics grid */
    .ai-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }

    .ai-metric-card {
        padding: var(--space-4);
    }

    .ai-metric-value {
        font-size: var(--text-2xl);
    }

    /* Feature list */
    .ai-feature-list-item {
        font-size: var(--text-sm);
    }

    /* Glass cards */
    .ai-glass-card {
        padding: var(--space-5);
    }

    /* Split sections */
    .ai-split-section {
        gap: var(--space-6);
    }

    /* Testimonial */
    .ai-testimonial {
        padding: var(--space-6);
    }

    .ai-testimonial-quote {
        font-size: var(--text-lg);
    }

    /* CTA section */
    .ai-cta-box {
        padding: var(--space-8) var(--space-4);
    }

    .ai-cta-title {
        font-size: var(--text-xl);
    }
}

/* Small Mobile (480px) */
@media (max-width: 480px) {
    .ai-container {
        padding: 0 var(--space-3);
    }

    .ai-metrics-grid {
        grid-template-columns: 1fr;
    }

    .ai-headline-xl {
        font-size: clamp(1.75rem, 7vw, 2.5rem);
    }

    .ai-headline-lg {
        font-size: clamp(1.5rem, 6vw, 2rem);
    }

    .ai-badge {
        font-size: 0.65rem;
        padding: var(--space-1) var(--space-2);
    }

    .ai-btn {
        padding: var(--space-3) var(--space-4);
        font-size: var(--text-sm);
    }

    .ai-btn-xl {
        padding: var(--space-4) var(--space-6);
        font-size: var(--text-base);
    }
}