:root {
  --color-primary: #00d4ff;
  --color-secondary: #0099cc;
  --color-accent: #ff006e;
  --color-accent-light: #ff3d8a;
  --color-success: #00ff88;
  --color-warning: #ffaa00;
  --color-error: #ff4444;
  
  --color-dark: #0a0a0f;
  --color-darker: #151520;
  --color-surface: #1a1a2e;
  --color-surface-light: #252540;
  --color-border: #333355;
  --color-border-light: #444466;
  
  --color-text: #ffffff;
  --color-text-secondary: #b8c5d1;
  --color-text-muted: #8892a0;

  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  --gradient-surface: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-light) 100%);
  --gradient-hero: linear-gradient(135deg, var(--color-dark) 0%, var(--color-darker) 50%, var(--color-surface) 100%);

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 80px;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-display: 'Inter', system-ui, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 48px;
  --font-size-4xl: 64px;

  --border-radius: 8px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
  --shadow-glow-accent: 0 0 20px rgba(255, 0, 110, 0.3);

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

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

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

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

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

h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
}

h2 {
  font-size: var(--font-size-3xl);
  text-align: center;
}

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

h4 {
  font-size: var(--font-size-xl);
}

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

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: var(--font-size-base);
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
  text-align: center;
  min-width: 160px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-dark);
  box-shadow: var(--shadow-md);
}

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

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

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  transition: var(--transition-normal);
}

.header.scrolled {
  background: rgba(10, 10, 15, 0.95);
  padding: var(--spacing-md) 0;
}

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

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

.logo {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  transition: var(--transition-normal);
}

.logo:hover {
  transform: scale(1.1);
  filter: drop-shadow(var(--shadow-glow));
}

.brand-name {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-menu a {
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-fast);
}

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

.nav-menu a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  padding: var(--spacing-4xl) 0;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.hero-background::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 0, 110, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  align-items: center;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  width: 100%;
}

.hero-text {
  text-align: left;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-img {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
  transition: var(--transition-normal);
  object-fit: cover;
  aspect-ratio: 4/3;
}

.hero-img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-glow);
}

.hero h1 {
  font-size: clamp(var(--font-size-3xl), 6vw, var(--font-size-4xl));
  margin-bottom: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 50%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
  animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-visual {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120%;
  height: 120%;
  opacity: 0.1;
  z-index: 1;
}

/* Floating Elements */
.floating-element {
  position: absolute;
  animation: float 6s ease-in-out infinite;
}

.floating-element:nth-child(1) {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.floating-element:nth-child(2) {
  top: 60%;
  right: 15%;
  animation-delay: 2s;
}

.floating-element:nth-child(3) {
  bottom: 20%;
  left: 20%;
  animation-delay: 4s;
}

/* Sections */
.section {
  padding: var(--spacing-4xl) 0;
  position: relative;
}

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

.section-title {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-lg);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-2xl);
}

.feature-card {
  background: var(--gradient-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: var(--transition-normal);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  transition: var(--transition-normal);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1);
  filter: drop-shadow(var(--shadow-glow));
}

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

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

/* Products Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
}

.product-card {
  background: var(--gradient-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  position: relative;
}

.product-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition-normal);
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.product-card:hover .product-img {
  transform: scale(1.05);
}

.product-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(255, 0, 110, 0.05) 100%);
  opacity: 0;
  transition: var(--transition-normal);
}

.product-card:hover::after {
  opacity: 1;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-accent);
}

.product-image {
  height: 200px;
  background: var(--color-darker);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-image svg {
  width: 100%;
  height: 100%;
  transition: var(--transition-normal);
}

.product-card:hover .product-image svg {
  transform: scale(1.05);
}

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

.product-card h3 {
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-xl);
}

.product-price {
  font-weight: 800;
  color: var(--color-primary);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
}

.product-desc {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

/* Stats Section */
.stats {
  background: var(--gradient-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-2xl);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-xl);
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  display: block;
}

.stat-label {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  font-weight: 500;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
}

.testimonial-card {
  background: var(--gradient-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  position: relative;
  transition: var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.testimonial-quote {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  font-style: italic;
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

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

.testimonial-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-dark);
}

.testimonial-info h4 {
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-base);
}

.testimonial-rating {
  color: #fbbf24;
  font-size: var(--font-size-sm);
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
}

.contact-card {
  background: var(--gradient-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  transition: var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.contact-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-lg);
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-card h4 {
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.contact-link {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
  transition: var(--transition-fast);
}

.contact-link:hover {
  color: var(--color-accent);
}

/* Enhanced Footer */
.footer {
  background: var(--color-darker);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer-brand {
  max-width: 350px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.footer-logo .logo {
  width: 40px;
  height: 40px;
}

.footer-logo h4 {
  color: var(--color-text);
  margin: 0;
  font-size: var(--font-size-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

.footer-section h4 {
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
}

.footer-links {
  list-style: none;
}

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

.footer-links span {
  color: var(--color-text-secondary);
}

.footer-links a {
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

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

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

.footer-bottom p {
  color: var(--color-text-muted);
  margin: 0;
}

.content-image {
  width: 100%;
  max-width: 400px;
  height: 250px;
  object-fit: cover;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
}

.content-image:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 48px;
    --font-size-3xl: 36px;
    --font-size-2xl: 28px;
    --spacing-4xl: 48px;
    --spacing-3xl: 40px;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .nav-menu {
    display: none;
  }

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

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    text-align: center;
  }

  .hero-text {
    text-align: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .features-grid,
  .products-grid,
  .stats-grid,
  .testimonials-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 480px) {
  .hero-content {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }

  .feature-card,
  .product-card,
  .testimonial-card,
  .contact-card {
    padding: var(--spacing-lg);
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }