/* Edge AI - Cutting Edge Styles
 * Modern CSS with custom properties, container queries, and advanced features
 */

/* ============================================
   CSS Custom Properties & Design Tokens
   ============================================ */
:root {
    /* Color System - Dark Theme (Default) */
    --color-bg-primary: #000000;
    --color-bg-secondary: #0a0a0a;
    --color-bg-tertiary: #111111;

    --color-accent-cyan: #00ffff;
    --color-accent-blue: #0080ff;
    --color-accent-purple: #8000ff;
    --color-accent-gradient: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-blue));

    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #666666;

    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-bg-hover: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-hover: rgba(0, 255, 255, 0.3);

    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Typography Scale */
    --font-family-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-family-display: 'Space Grotesk', var(--font-family-body);

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 255, 255, 0.3);
    --shadow-glow-intense: 0 0 50px rgba(0, 255, 255, 0.5);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Z-Index Scale */
    --z-background: -1;
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 500;
    --z-fixed: 1000;
    --z-modal: 1100;
    --z-tooltip: 1200;

    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1200px;
    --container-2xl: 1400px;
}

/* Light Theme Variables */
[data-theme="light"] {
    --color-bg-primary: #f8fafc;
    --color-bg-secondary: #f1f5f9;
    --color-bg-tertiary: #e2e8f0;

    --color-accent-cyan: #0891b2;
    --color-accent-blue: #0066cc;
    --color-accent-purple: #7c3aed;

    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;

    --glass-bg: rgba(0, 0, 0, 0.03);
    --glass-bg-hover: rgba(0, 0, 0, 0.06);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-border-hover: rgba(8, 145, 178, 0.3);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 30px rgba(8, 145, 178, 0.2);
    --shadow-glow-intense: 0 0 50px rgba(8, 145, 178, 0.3);
}

/* ============================================
   Reset & Base Styles
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus visible for accessibility */
:focus-visible {
    outline: 2px solid var(--color-accent-cyan);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-accent-cyan);
    color: var(--color-bg-primary);
    font-weight: 600;
    border-radius: var(--radius-md);
    z-index: var(--z-tooltip);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
}

/* ============================================
   Background Effects
   ============================================ */
.grid-background {
    position: fixed;
    inset: 0;
    z-index: var(--z-background);
    opacity: 0.3;
    pointer-events: none;
}

.grid-background::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--color-accent-cyan) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-accent-cyan) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
    opacity: 0.1;
}

@keyframes grid-move {
    from { transform: translate(0, 0); }
    to { transform: translate(50px, 50px); }
}

/* Floating Particles */
.particles {
    position: fixed;
    inset: 0;
    z-index: var(--z-base);
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
    animation: float 20s infinite linear;
    box-shadow: 0 0 10px var(--color-accent-cyan);
    will-change: transform, opacity;
}

@keyframes float {
    0% {
        transform: translateY(100vh) translateX(0);
        opacity: 0;
    }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% {
        transform: translateY(-100vh) translateX(100px);
        opacity: 0;
    }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: var(--space-lg) 5%;
    z-index: var(--z-fixed);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
    transition: padding var(--transition-base), background var(--transition-base);
}

.navbar.scrolled {
    padding: var(--space-md) 5%;
    background: rgba(0, 0, 0, 0.9);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(248, 250, 252, 0.95);
}

.nav-container {
    max-width: var(--container-2xl);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo {
    height: 40px;
    width: auto;
}

.logo-text {
    font-family: var(--font-family-display);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

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

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
    padding: var(--space-xs) 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-cyan);
    transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--color-accent-cyan);
}

.nav-links a:hover::after,
.nav-links a:focus::after {
    width: 100%;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    padding: var(--space-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    width: 40px;
    height: 40px;
}

.theme-toggle:hover {
    background: var(--glass-bg-hover);
    border-color: var(--color-accent-cyan);
    color: var(--color-accent-cyan);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    width: 20px;
    height: 20px;
}

[data-theme="light"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon,
:root:not([data-theme]) .theme-toggle .icon-moon {
    display: none;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: var(--font-size-2xl);
    cursor: pointer;
    padding: var(--space-sm);
    z-index: calc(var(--z-fixed) + 10);
}

.mobile-menu-btn .icon-close {
    display: none;
}

.mobile-menu-btn[aria-expanded="true"] .icon-bars {
    display: none;
}

.mobile-menu-btn[aria-expanded="true"] .icon-close {
    display: block;
}

.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(300px, 80vw);
    height: 100vh;
    background: var(--color-bg-secondary);
    border-left: 1px solid var(--glass-border);
    padding: var(--space-5xl) var(--space-xl);
    transition: right var(--transition-base);
    z-index: var(--z-fixed);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    z-index: calc(var(--z-fixed) - 1);
}

.mobile-nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.mobile-nav-links a {
    display: block;
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--font-size-lg);
    font-weight: 500;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav-links a:hover,
.mobile-nav-links a:focus {
    background: var(--glass-bg);
    color: var(--color-accent-cyan);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: var(--z-base);
    padding: var(--space-5xl) 5% var(--space-3xl);
}

.hero-content {
    max-width: var(--container-xl);
    text-align: center;
    animation: hero-fade 1.5s ease;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-accent-cyan);
    margin-bottom: var(--space-xl);
    backdrop-filter: blur(10px);
}

.hero h1 {
    font-family: var(--font-family-display);
    font-size: clamp(var(--font-size-4xl), 8vw, var(--font-size-6xl));
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-cyan) 50%, var(--color-accent-blue) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradient-shift 5s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: clamp(var(--font-size-lg), 3vw, var(--font-size-2xl));
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    font-weight: 300;
    line-height: 1.4;
}

.hero-description {
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    flex-wrap: wrap;
}

/* Circuit Lines Animation */
.circuit-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    pointer-events: none;
    opacity: 0.15;
}

.circuit-line {
    position: absolute;
    background: var(--color-accent-cyan);
    box-shadow: 0 0 10px var(--color-accent-cyan);
}

.circuit-line.horizontal {
    height: 1px;
    width: 100px;
    animation: pulse-h 3s infinite;
}

.circuit-line.vertical {
    width: 1px;
    height: 100px;
    animation: pulse-v 3s infinite;
}

@keyframes pulse-h {
    0%, 100% { transform: scaleX(0); opacity: 0; }
    50% { transform: scaleX(1); opacity: 1; }
}

@keyframes pulse-v {
    0%, 100% { transform: scaleY(0); opacity: 0; }
    50% { transform: scaleY(1); opacity: 1; }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-base);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover,
.btn-primary:focus {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background: var(--glass-bg);
    border-color: var(--color-accent-cyan);
    color: var(--color-accent-cyan);
}

/* ============================================
   Section Styles
   ============================================ */
.section {
    padding: var(--space-5xl) 5%;
    position: relative;
    z-index: var(--z-base);
}

.section--alt {
    background: linear-gradient(180deg, transparent, var(--color-bg-secondary));
}

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

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-4xl);
}

.section-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid var(--color-accent-cyan);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    color: var(--color-accent-cyan);
    margin-bottom: var(--space-lg);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-family-display);
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 700;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-accent-blue));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ============================================
   Card Components
   ============================================ */
.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent-cyan), transparent);
    animation: scan 3s infinite;
}

@keyframes scan {
    from { transform: translateX(-100%); }
    to { transform: translateX(100%); }
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--glass-border-hover);
    box-shadow: var(--shadow-glow);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-lg);
    color: var(--color-bg-primary);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-md);
    font-family: var(--font-family-display);
    color: var(--color-text-primary);
}

.card-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

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

.card-features li {
    padding: var(--space-sm) 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.card-features li::before {
    content: '\25b8';
    color: var(--color-accent-cyan);
    font-weight: bold;
}

/* ============================================
   Grid Layouts
   ============================================ */
.grid {
    display: grid;
    gap: var(--space-xl);
    max-width: var(--container-xl);
    margin: 0 auto;
}

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

.grid--3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid--6 {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

/* ============================================
   Flow Diagram
   ============================================ */
.flow-diagram {
    max-width: 1000px;
    margin: var(--space-4xl) auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.flow-node {
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    width: 250px;
    text-align: center;
    backdrop-filter: blur(10px);
    position: relative;
    animation: node-pulse 3s infinite;
}

@keyframes node-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.flow-node-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-purple));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    color: var(--color-bg-primary);
}

.flow-node-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    font-family: var(--font-family-display);
    color: var(--color-text-primary);
}

.flow-node-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.flow-arrow {
    position: absolute;
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent-cyan), transparent);
    top: 50%;
    animation: flow 2s infinite;
}

.flow-arrow:nth-of-type(1) {
    left: calc(250px + 20px);
}

.flow-arrow:nth-of-type(2) {
    right: calc(250px + 20px);
}

@keyframes flow {
    from { transform: translateX(-100%); }
    to { transform: translateX(100%); }
}

/* ============================================
   Use Case Cards
   ============================================ */
.use-case-card {
    background: linear-gradient(135deg, var(--glass-bg), rgba(0, 255, 255, 0.02));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.use-case-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 255, 255, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.use-case-card:hover::after {
    opacity: 1;
}

.use-case-card:hover {
    transform: translateY(-5px);
    border-color: var(--glass-border-hover);
}

.use-case-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.use-case-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-md);
    font-family: var(--font-family-display);
    color: var(--color-text-primary);
}

.use-case-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.use-case-stats {
    display: flex;
    gap: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--glass-border);
}

.stat {
    flex: 1;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-accent-cyan);
    font-family: var(--font-family-display);
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

/* ============================================
   Tech Stack
   ============================================ */
.tech-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.tech-item:hover {
    transform: translateY(-5px);
    border-color: var(--glass-border-hover);
    box-shadow: var(--shadow-glow);
}

.tech-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-md);
    color: var(--color-accent-cyan);
}

.tech-name {
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.tech-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-3xl);
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.05), rgba(128, 0, 255, 0.05));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    backdrop-filter: blur(10px);
    text-align: center;
}

.cta-title {
    font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-4xl));
    font-weight: 700;
    margin-bottom: var(--space-lg);
    font-family: var(--font-family-display);
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-accent-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.cta-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-3xl) 5% var(--space-xl);
    border-top: 1px solid var(--glass-border);
    position: relative;
    z-index: var(--z-base);
    background: var(--color-bg-secondary);
}

.footer-content {
    max-width: var(--container-xl);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand h3 {
    font-family: var(--font-family-display);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.footer-brand p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.social-link:hover,
.social-link:focus {
    background: rgba(0, 255, 255, 0.1);
    border-color: var(--color-accent-cyan);
    color: var(--color-accent-cyan);
    transform: translateY(-2px);
}

.footer-column h4 {
    font-weight: 600;
    margin-bottom: var(--space-lg);
    color: var(--color-text-primary);
}

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

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

.footer-column ul li a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
}

.footer-column ul li a:hover,
.footer-column ul li a:focus {
    color: var(--color-accent-cyan);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.footer-bottom a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-bottom a:hover {
    color: var(--color-accent-cyan);
}

/* ============================================
   Chatbot
   ============================================ */
.chatbot-trigger {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 60px;
    height: 60px;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-glow);
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
    border: none;
}

.chatbot-trigger:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow-intense);
}

.chatbot-trigger i {
    color: var(--color-bg-primary);
    font-size: var(--font-size-2xl);
}

.chatbot-trigger[aria-expanded="true"] {
    display: none;
}

/* Chat Window */
.chat-window {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: min(400px, calc(100vw - 40px));
    height: min(600px, calc(100vh - 100px));
    background: var(--color-bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    display: none;
    flex-direction: column;
    z-index: var(--z-modal);
    box-shadow: var(--shadow-xl);
    animation: chat-appear 0.3s ease;
}

.chat-window[aria-hidden="false"] {
    display: flex;
}

@keyframes chat-appear {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.chat-header {
    padding: var(--space-lg);
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.1), rgba(128, 0, 255, 0.1));
    border-bottom: 1px solid var(--glass-border);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h3 {
    font-family: var(--font-family-display);
    font-size: var(--font-size-lg);
    background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.close-chat {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--font-size-2xl);
    cursor: pointer;
    transition: color var(--transition-fast);
    padding: var(--space-xs);
    line-height: 1;
}

.close-chat:hover {
    color: var(--color-accent-cyan);
}

.chat-body {
    flex: 1;
    padding: var(--space-lg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.message {
    max-width: 85%;
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    animation: message-appear 0.3s ease;
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

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

.bot-message {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    align-self: flex-start;
    border-bottom-left-radius: var(--radius-sm);
    color: var(--color-text-primary);
}

.user-message {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(0, 128, 255, 0.2));
    align-self: flex-end;
    border-bottom-right-radius: var(--radius-sm);
    color: var(--color-text-primary);
}

.chat-footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--glass-border);
    display: flex;
    gap: var(--space-md);
}

.chat-input {
    flex: 1;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    padding: var(--space-sm) var(--space-lg);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    font-family: inherit;
}

.chat-input::placeholder {
    color: var(--color-text-muted);
}

.chat-input:focus {
    outline: none;
    border-color: var(--color-accent-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.1);
}

.send-btn {
    width: 45px;
    height: 45px;
    background: var(--color-accent-gradient);
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-bg-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

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

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 6px;
    padding: var(--space-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: var(--radius-sm);
    align-self: flex-start;
    max-width: 80px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
    animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* ============================================
   Scroll Animations
   ============================================ */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .theme-toggle {
        order: -1;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero h1 {
        font-size: clamp(var(--font-size-3xl), 10vw, var(--font-size-5xl));
    }

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

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .flow-diagram {
        flex-direction: column;
        gap: var(--space-xl);
    }

    .flow-arrow {
        display: none;
    }

    .flow-node {
        width: 100%;
        max-width: 300px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-social {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    .chat-window {
        width: calc(100vw - 32px);
        height: calc(100vh - 100px);
        right: 16px;
        bottom: 16px;
    }

    .chatbot-trigger {
        right: 16px;
        bottom: 16px;
    }

    .grid--6 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .section {
        padding: var(--space-3xl) 4%;
    }

    .cta-content {
        padding: var(--space-xl);
    }

    .use-case-stats {
        flex-direction: column;
        gap: var(--space-md);
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .grid-background,
    .particles,
    .chatbot-trigger,
    .chat-window,
    .mobile-menu-btn,
    .mobile-nav,
    .mobile-nav-overlay {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .navbar {
        position: static;
        background: none;
        border: none;
    }
}