/* Modern AI Website Design System - PLATO42 */

/* ============================================
   1. CSS CUSTOM PROPERTIES & DESIGN TOKENS
   ============================================ */

:root {
  /* Modern Color Palette */
  --color-background: #050505;
  --color-surface: #0a0a0b;
  --color-surface-elevated: #141416;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.16);
  
  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;
  
  /* Accent Colors - Modern AI Gradients */
  --color-accent-primary: #6366f1;
  --color-accent-secondary: #a855f7;
  --color-accent-tertiary: #22d3ee;
  --color-accent-glow: #818cf8;
  
  /* Gradient Definitions */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-mesh: radial-gradient(at 40% 20%, hsla(251, 90%, 65%, 0.3) 0px, transparent 50%),
                   radial-gradient(at 80% 0%, hsla(189, 90%, 65%, 0.2) 0px, transparent 50%),
                   radial-gradient(at 0% 50%, hsla(343, 90%, 65%, 0.2) 0px, transparent 50%),
                   radial-gradient(at 80% 100%, hsla(240, 90%, 65%, 0.25) 0px, transparent 50%),
                   radial-gradient(at 0% 100%, hsla(275, 90%, 65%, 0.2) 0px, transparent 50%);
  --gradient-text: linear-gradient(to right, #fff 0%, #c3c3d6 50%, #fff 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-accent-primary) 0%, var(--color-accent-secondary) 50%, var(--color-accent-tertiary) 100%);
  
  /* Spacing System */
  --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-size-xs: clamp(0.75rem, 0.8vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 1vw, 1rem);
  --font-size-base: clamp(1rem, 1.1vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1.3vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.5vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 2vw, 1.875rem);
  --font-size-3xl: clamp(1.875rem, 2.5vw, 2.25rem);
  --font-size-4xl: clamp(2.25rem, 3vw, 3rem);
  --font-size-5xl: clamp(3rem, 4vw, 3.75rem);
  --font-size-6xl: clamp(3.75rem, 5vw, 4.5rem);
  --font-size-hero: clamp(4rem, 8vw, 7rem);
  
  /* Effects */
  --blur-glass: 12px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 50px rgba(99, 102, 241, 0.3);
  
  /* Animations */
  --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(0.68, -0.55, 0.265, 1.55);
}

/* ============================================
   2. RESET & BASE STYLES
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-background);
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-mesh);
  opacity: 0.4;
  z-index: -1;
  animation: mesh-animation 20s ease-in-out infinite;
}

@keyframes mesh-animation {
  0%, 100% { transform: rotate(0deg) scale(1); }
  33% { transform: rotate(1deg) scale(1.02); }
  66% { transform: rotate(-1deg) scale(1.01); }
}

/* Noise texture overlay */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.03;
  z-index: -1;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
}

/* ============================================
   3. TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-lg);
}

h1 {
  font-size: var(--font-size-hero);
  font-weight: 900;
  background: var(--gradient-text);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 8s ease infinite;
}

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

h2 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
}

h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
}

p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 65ch;
}

.highlight {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

/* ============================================
   4. LAYOUT & CONTAINERS
   ============================================ */

section {
  padding: var(--space-4xl) var(--space-xl);
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* ============================================
   5. HERO SECTION
   ============================================ */

#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* Animated gradient orbs */
#hero::before,
#hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: float 20s infinite ease-in-out;
}

#hero::before {
  width: 600px;
  height: 600px;
  background: var(--gradient-primary);
  top: -20%;
  left: -10%;
  animation-delay: 0s;
}

#hero::after {
  width: 500px;
  height: 500px;
  background: var(--gradient-accent);
  bottom: -20%;
  right: -10%;
  animation-delay: 10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 10;
  animation: hero-entrance 1s ease-out;
}

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

.hero-content h1 {
  margin-bottom: var(--space-md);
}

.subtitle {
  font-size: var(--font-size-2xl);
  font-weight: 300;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tagline {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Matrix effect (subtle) */
#hero-matrix {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.05;
  pointer-events: none;
  z-index: 1;
}

/* Hero particles */
.hero-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 2;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-accent-glow);
  border-radius: 50%;
  opacity: 0;
  animation: particle-float 15s linear infinite;
}

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

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  transition: var(--transition-base);
}

.scroll-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: rotate(45deg);
  animation: scroll-bounce 2s infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: rotate(45deg) translateX(0); }
  50% { transform: rotate(45deg) translateX(-5px); }
}

/* ============================================
   6. BUTTONS & INTERACTIVE ELEMENTS
   ============================================ */

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--gradient-accent);
  color: white;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--transition-base);
  transform-style: preserve-3d;
}

.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(-100%);
  transition: var(--transition-base);
}

.cta-button:hover::before {
  transform: translateX(0);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.cta-button:active {
  transform: translateY(0);
}

/* ============================================
   7. VALUE PROPOSITION SECTION
   ============================================ */

#value-proposition {
  background: var(--color-background);
  position: relative;
  overflow: hidden;
  padding: var(--space-5xl) var(--space-xl);
}

/* Animated background gradient */
#value-proposition::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 100%;
  height: 200%;
  background: radial-gradient(ellipse at center, 
    rgba(99, 102, 241, 0.15) 0%, 
    transparent 40%);
  animation: value-gradient-float 20s ease-in-out infinite;
}

#value-proposition::after {
  content: '';
  position: absolute;
  bottom: -50%;
  left: -30%;
  width: 100%;
  height: 200%;
  background: radial-gradient(ellipse at center, 
    rgba(168, 85, 247, 0.15) 0%, 
    transparent 40%);
  animation: value-gradient-float 20s ease-in-out infinite reverse;
  animation-delay: 10s;
}

@keyframes value-gradient-float {
  0%, 100% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(10deg) scale(1.1); }
}

.value-container {
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.value-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-5xl);
  align-items: center;
}

.value-content h2 {
  font-size: var(--font-size-5xl);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--space-xl);
  background: linear-gradient(135deg, 
    var(--color-text-primary) 0%, 
    var(--color-accent-primary) 50%, 
    var(--color-accent-secondary) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-wave 6s ease infinite;
}

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

.value-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-3xl);
  max-width: 90%;
}

.feature-cards {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
}

.feature-card {
  background: linear-gradient(135deg, 
    rgba(255, 255, 255, 0.03) 0%, 
    rgba(255, 255, 255, 0.01) 100%);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px;
  padding: var(--space-xl) var(--space-2xl);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-xl);
  align-items: start;
}

/* Gradient border animation */
.feature-card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 20px;
  padding: 2px;
  background: linear-gradient(90deg, 
    transparent,
    var(--color-accent-primary),
    var(--color-accent-secondary),
    transparent);
  background-size: 300% 100%;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, 
                linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-slow);
  animation: border-slide 3s linear infinite;
}

@keyframes border-slide {
  0% { background-position: 0% center; }
  100% { background-position: 100% center; }
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card:hover {
  transform: translateX(8px);
  background: linear-gradient(135deg, 
    rgba(99, 102, 241, 0.08) 0%, 
    rgba(168, 85, 247, 0.05) 100%);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Icon container with gradient background */
.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, 
    var(--color-accent-primary), 
    var(--color-accent-secondary));
  border-radius: 12px;
  font-size: 24px;
  transition: all var(--transition-base);
  box-shadow: 0 8px 16px rgba(99, 102, 241, 0.2);
}

.feature-card:hover .feature-icon {
  transform: rotate(-5deg) scale(1.1);
  box-shadow: 0 12px 24px rgba(99, 102, 241, 0.3);
}

.feature-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.feature-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
  transition: var(--transition-base);
}

.feature-card:hover h3 {
  background: linear-gradient(90deg, 
    var(--color-text-primary), 
    var(--color-accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-card p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
  transition: var(--transition-base);
}

.feature-card:hover p {
  color: rgba(255, 255, 255, 0.8);
}

/* Neural visualization - Modern 3D effect */
.value-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  perspective: 1000px;
}

.neural-visualization {
  width: 450px;
  height: 450px;
  position: relative;
  transform-style: preserve-3d;
  animation: rotate-3d 20s linear infinite;
}

@keyframes rotate-3d {
  from { 
    transform: rotateX(10deg) rotateY(0deg) rotateZ(5deg);
  }
  to { 
    transform: rotateX(10deg) rotateY(360deg) rotateZ(5deg);
  }
}

/* Central glowing core */
.neural-core {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120px;
  height: 120px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at 30% 30%, 
    rgba(99, 102, 241, 0.9) 0%, 
    rgba(168, 85, 247, 0.7) 50%, 
    rgba(34, 211, 238, 0.5) 100%);
  border-radius: 50%;
  box-shadow: 
    0 0 60px rgba(99, 102, 241, 0.6),
    0 0 120px rgba(168, 85, 247, 0.4),
    inset 0 0 40px rgba(255, 255, 255, 0.2);
  animation: core-pulse 3s ease-in-out infinite;
}

@keyframes core-pulse {
  0%, 100% { 
    transform: translate(-50%, -50%) scale(1);
    filter: brightness(1);
  }
  50% { 
    transform: translate(-50%, -50%) scale(1.15);
    filter: brightness(1.3);
  }
}

/* Orbital rings */
.neural-visualization::before,
.neural-visualization::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 350px;
  height: 350px;
  border: 2px solid transparent;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.neural-visualization::before {
  border-color: rgba(99, 102, 241, 0.2);
  border-top-color: rgba(99, 102, 241, 0.6);
  animation: ring-rotate 4s linear infinite;
}

.neural-visualization::after {
  width: 280px;
  height: 280px;
  border-color: rgba(168, 85, 247, 0.2);
  border-right-color: rgba(168, 85, 247, 0.6);
  animation: ring-rotate 3s linear infinite reverse;
}

@keyframes ring-rotate {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Floating nodes */
.neural-node {
  position: absolute;
  width: 16px;
  height: 16px;
  background: radial-gradient(circle, 
    rgba(99, 102, 241, 1) 0%, 
    rgba(99, 102, 241, 0.6) 100%);
  border-radius: 50%;
  box-shadow: 
    0 0 20px rgba(99, 102, 241, 0.8),
    0 0 40px rgba(99, 102, 241, 0.4);
  animation: node-float 6s ease-in-out infinite;
}

.neural-node:nth-child(2) { 
  top: 15%; left: 50%; 
  transform: translateX(-50%);
  animation-delay: 0s;
  background: radial-gradient(circle, 
    rgba(168, 85, 247, 1) 0%, 
    rgba(168, 85, 247, 0.6) 100%);
}

.neural-node:nth-child(3) { 
  top: 30%; right: 10%; 
  animation-delay: 1s;
}

.neural-node:nth-child(4) { 
  bottom: 30%; right: 10%; 
  animation-delay: 2s;
  background: radial-gradient(circle, 
    rgba(34, 211, 238, 1) 0%, 
    rgba(34, 211, 238, 0.6) 100%);
}

.neural-node:nth-child(5) { 
  bottom: 15%; left: 50%; 
  transform: translateX(-50%);
  animation-delay: 3s;
}

.neural-node:nth-child(6) { 
  bottom: 30%; left: 10%; 
  animation-delay: 4s;
  background: radial-gradient(circle, 
    rgba(168, 85, 247, 1) 0%, 
    rgba(168, 85, 247, 0.6) 100%);
}

.neural-node:nth-child(7) { 
  top: 30%; left: 10%; 
  animation-delay: 5s;
}

@keyframes node-float {
  0%, 100% { 
    transform: translateY(0) scale(1);
    opacity: 0.8;
  }
  50% { 
    transform: translateY(-10px) scale(1.2);
    opacity: 1;
  }
}

/* Energy particles */
.orbit-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: radial-gradient(circle, 
    rgba(255, 255, 255, 1) 0%, 
    rgba(99, 102, 241, 0.8) 100%);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform-origin: 0 0;
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.8);
}

.orbit-particle:nth-child(8) {
  animation: particle-orbit 8s linear infinite;
}

.orbit-particle:nth-child(9) {
  animation: particle-orbit 10s linear infinite reverse;
  animation-delay: 2s;
  background: radial-gradient(circle, 
    rgba(255, 255, 255, 1) 0%, 
    rgba(168, 85, 247, 0.8) 100%);
}

.orbit-particle:nth-child(10) {
  animation: particle-orbit 12s linear infinite;
  animation-delay: 4s;
  background: radial-gradient(circle, 
    rgba(255, 255, 255, 1) 0%, 
    rgba(34, 211, 238, 0.8) 100%);
}

@keyframes particle-orbit {
  from {
    transform: rotate(0deg) translateX(180px) rotate(0deg) scale(1);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  to {
    transform: rotate(360deg) translateX(180px) rotate(-360deg) scale(1);
    opacity: 0;
  }
}

/* ============================================
   8. SERVICES SECTION
   ============================================ */

#services {
  background: var(--color-surface);
  position: relative;
}

#services::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(168, 85, 247, 0.1) 0%, transparent 50%);
  opacity: 0.5;
}

.section-title {
  text-align: center;
  font-size: var(--font-size-4xl);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.services-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
}

.service-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(var(--blur-glass));
  transition: all var(--transition-slow);
  cursor: pointer;
  transform-style: preserve-3d;
}

.service-item::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 24px;
  padding: 1px;
  background: linear-gradient(135deg, 
    var(--color-accent-primary),
    var(--color-accent-secondary),
    var(--color-accent-tertiary));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.service-item:hover::before {
  opacity: 1;
}

.service-item:hover {
  transform: translateY(-8px) rotateX(2deg);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 
    0 30px 60px rgba(0, 0, 0, 0.3),
    0 0 80px rgba(99, 102, 241, 0.2);
}

.service-item h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

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

.service-meta {
  font-size: var(--font-size-sm);
  color: var(--color-accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.7;
  margin-bottom: var(--space-xl);
}

.service-button {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  color: white;
  border: none;
  padding: var(--space-sm) var(--space-lg);
  border-radius: 8px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-button::after {
  content: '→';
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%) translateX(0);
  transition: var(--transition-spring);
  opacity: 0;
}

.service-button:hover::after {
  transform: translateY(-50%) translateX(-5px);
  opacity: 1;
}

.service-button:hover {
  padding-right: var(--space-2xl);
  transform: translateX(-2px);
  box-shadow: 0 5px 20px rgba(99, 102, 241, 0.4);
}

/* ============================================
   9. CTA SECTION
   ============================================ */

#cta {
  position: relative;
  padding: var(--space-3xl) var(--space-xl);
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-background) 100%);
  overflow: hidden;
  min-height: auto;
}

#cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  animation: pulse-slow 4s ease-in-out infinite;
}

@keyframes pulse-slow {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.2; }
  50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.1; }
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

#cta h2 {
  font-size: var(--font-size-4xl);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
}

#cta p {
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

#cta .cta-button {
  font-size: var(--font-size-lg);
  padding: var(--space-md) var(--space-2xl);
  box-shadow: 0 20px 40px rgba(99, 102, 241, 0.3);
}

.cta-arrow {
  display: inline-block;
  transition: var(--transition-spring);
}

#cta .cta-button:hover .cta-arrow {
  transform: translateX(5px);
}

/* ============================================
   10. CONTACT FORM
   ============================================ */

#contact {
  background: var(--color-background);
  position: relative;
}

.contact-form {
  max-width: 800px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: var(--space-2xl);
  backdrop-filter: blur(var(--blur-glass));
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-group label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  transition: var(--transition-base);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.optional {
  opacity: 0.5;
  font-weight: 400;
}

.form-submit {
  display: flex;
  justify-content: center;
  margin-top: var(--space-2xl);
}

.submit-button {
  background: var(--gradient-accent);
  color: white;
  border: none;
  padding: var(--space-md) var(--space-3xl);
  border-radius: 12px;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.submit-button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.submit-button:hover::before {
  width: 300px;
  height: 300px;
}

.submit-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

/* ============================================
   11. FOOTER
   ============================================ */

footer {
  background: linear-gradient(180deg, 
    var(--color-background) 0%, 
    #000000 100%);
  padding: var(--space-4xl) var(--space-xl) var(--space-3xl);
  position: relative;
  overflow: hidden;
  margin-top: var(--space-5xl);
}

/* Animated gradient line at top */
footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent 0%,
    var(--color-accent-primary) 20%,
    var(--color-accent-secondary) 50%,
    var(--color-accent-tertiary) 80%,
    transparent 100%);
  animation: footer-line-slide 8s linear infinite;
}

@keyframes footer-line-slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Subtle grid pattern */
footer::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
  background-size: 100px 100px;
  opacity: 0.5;
  animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
  0% { transform: translate(0, 0); }
  100% { transform: translate(100px, 100px); }
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-3xl);
}

/* Left section - Copyright */
.footer-left {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-left p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin: 0;
  letter-spacing: 0.05em;
}

.footer-year {
  background: linear-gradient(90deg, 
    var(--color-text-muted), 
    var(--color-accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
}

/* Center section - Logo/Brand */
.footer-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.footer-logo {
  font-size: var(--font-size-2xl);
  font-weight: 900;
  letter-spacing: 0.1em;
  background: linear-gradient(135deg, 
    var(--color-text-primary) 0%, 
    var(--color-accent-primary) 50%, 
    var(--color-accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  animation: logo-glow 4s ease-in-out infinite;
}

@keyframes logo-glow {
  0%, 100% { 
    filter: brightness(1);
    transform: scale(1);
  }
  50% { 
    filter: brightness(1.2) drop-shadow(0 0 20px rgba(99, 102, 241, 0.5));
    transform: scale(1.05);
  }
}

.footer-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  opacity: 0.7;
}

/* Right section - Easter Egg */
.footer-right {
  text-align: right;
}

.easter-egg-text {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid transparent;
  letter-spacing: 0.05em;
}

.easter-egg-text::before {
  content: '🔮';
  position: absolute;
  left: -25px;
  opacity: 0;
  transition: all var(--transition-spring);
}

.easter-egg-text:hover {
  color: var(--color-accent-primary);
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateX(-10px);
  padding-left: var(--space-xl);
}

.easter-egg-text:hover::before {
  opacity: 1;
  left: var(--space-md);
}

/* Floating particles in footer */
.footer-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
}

.footer-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--color-accent-primary);
  border-radius: 50%;
  opacity: 0.3;
  animation: footer-float 15s linear infinite;
}

.footer-particle:nth-child(1) { 
  left: 10%; 
  animation-delay: 0s;
  animation-duration: 12s;
}

.footer-particle:nth-child(2) { 
  left: 30%; 
  animation-delay: 3s;
  animation-duration: 15s;
  background: var(--color-accent-secondary);
}

.footer-particle:nth-child(3) { 
  left: 50%; 
  animation-delay: 6s;
  animation-duration: 18s;
}

.footer-particle:nth-child(4) { 
  left: 70%; 
  animation-delay: 9s;
  animation-duration: 14s;
  background: var(--color-accent-tertiary);
}

.footer-particle:nth-child(5) { 
  left: 90%; 
  animation-delay: 12s;
  animation-duration: 16s;
}

@keyframes footer-float {
  0% {
    transform: translateY(100%) translateX(0);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
  }
  90% {
    opacity: 0.3;
  }
  100% {
    transform: translateY(-100vh) translateX(100px);
    opacity: 0;
  }
}

/* Social links (if added) */
.footer-social {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-md);
  justify-content: center;
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
  border-radius: 50%;
}

.social-link:hover {
  transform: translateY(-3px);
  border-color: transparent;
  color: white;
}

.social-link:hover::before {
  opacity: 1;
}

.social-link svg,
.social-link span {
  position: relative;
  z-index: 1;
}

/* Responsive footer */
@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-2xl);
  }
  
  .footer-right {
    text-align: center;
  }
  
  .footer-left {
    order: 2;
  }
  
  .footer-center {
    order: 1;
  }
  
  .footer-right {
    order: 3;
  }
}

/* ============================================
   12. SCROLL ANIMATIONS
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

/* ============================================
   13. RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  :root {
    --font-size-hero: clamp(3rem, 10vw, 5rem);
  }
  
  section {
    padding: var(--space-3xl) var(--space-lg);
  }
  
  .value-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .services-container {
    grid-template-columns: 1fr;
  }
  
  .neural-visualization {
    width: 300px;
    height: 300px;
  }
}

@media (max-width: 480px) {
  #hero h1 {
    font-size: clamp(2.5rem, 12vw, 4rem);
  }
  
  .subtitle {
    font-size: var(--font-size-lg);
  }
  
  .contact-form {
    padding: var(--space-lg);
  }
}

/* Cube Video Styling */
.cube-video {
  width: 400px;
  height: 400px;
  border-radius: 20px;
  object-fit: cover;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.3),
    0 0 40px rgba(99, 102, 241, 0.2),
    inset 0 0 0 1px rgba(255, 255, 255, 0.1);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.cube-video:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 
    0 30px 80px rgba(0, 0, 0, 0.4),
    0 0 60px rgba(99, 102, 241, 0.3),
    inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

/* Responsive cube video */
@media (max-width: 768px) {
  .cube-video {
    width: 300px;
    height: 300px;
    border-radius: 16px;
  }
}

@media (max-width: 480px) {
  .cube-video {
    width: 250px;
    height: 250px;
    border-radius: 12px;
  }
}

/* ============================================
   14. UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ============================================
   15. PERFORMANCE OPTIMIZATIONS
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Hardware acceleration for smooth animations */
.service-item,
.feature-card,
.cta-button,
.service-button,
.submit-button {
  will-change: transform;
  transform: translateZ(0);
}