/* ============================================
   HIDDEN STATE DRIFT - Dark Tech Aesthetic
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Core Colors */
  --black-void: #0a0a0b;
  --black-surface: #111113;
  --black-elevated: #18181b;
  --black-border: #27272a;
  
  /* Accent - Electric Cyan */
  --cyan-primary: #00f0ff;
  --cyan-glow: rgba(0, 240, 255, 0.15);
  --cyan-dim: #00a8b3;
  
  /* Secondary - Warning Orange */
  --orange-accent: #ff6b35;
  --orange-glow: rgba(255, 107, 53, 0.15);
  
  /* Text */
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  /* Gradients */
  --gradient-drift: linear-gradient(135deg, var(--cyan-primary) 0%, #7c3aed 50%, var(--orange-accent) 100%);
  --gradient-surface: linear-gradient(180deg, var(--black-surface) 0%, var(--black-void) 100%);
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  
  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

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

body {
  font-family: var(--font-display);
  background: var(--black-void);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Grid Background Pattern */
.grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* Noise Overlay */
.noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.03;
  pointer-events: none;
  z-index: 1;
  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' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) var(--space-lg);
  background: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--black-border);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border: 2px solid var(--cyan-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.logo-mark::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: var(--gradient-drift);
  opacity: 0.2;
  animation: drift 4s ease-in-out infinite;
}

.logo-mark span {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--cyan-primary);
  position: relative;
  z-index: 1;
}

@keyframes drift {
  0%, 100% { transform: translateX(-50%) translateY(-50%); }
  50% { transform: translateX(50%) translateY(50%); }
}

.logo-text {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.logo-text .accent {
  color: var(--cyan-primary);
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cyan-primary);
  transition: width 0.3s ease;
}

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

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

.nav-cta {
  background: transparent;
  border: 1px solid var(--cyan-primary);
  color: var(--cyan-primary);
  padding: 0.6rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.nav-cta:hover {
  background: var(--cyan-primary);
  color: var(--black-void);
  box-shadow: 0 0 30px var(--cyan-glow);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--space-2xl) var(--space-lg);
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--black-elevated);
  border: 1px solid var(--black-border);
  padding: 0.5rem 1rem;
  border-radius: 100px;
  margin-bottom: var(--space-lg);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.hero-badge .pulse {
  width: 8px;
  height: 8px;
  background: var(--cyan-primary);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--cyan-glow); }
  50% { opacity: 0.7; box-shadow: 0 0 0 10px transparent; }
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.hero h1 .gradient-text {
  background: var(--gradient-drift);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  line-height: 1.7;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 1rem 2rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--cyan-primary);
  color: var(--black-void);
}

.btn-primary:hover {
  box-shadow: 0 0 40px var(--cyan-glow), 0 10px 30px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--black-border);
}

.btn-secondary:hover {
  border-color: var(--cyan-primary);
  color: var(--cyan-primary);
}

.btn-orange {
  background: var(--orange-accent);
  color: var(--black-void);
}

.btn-orange:hover {
  box-shadow: 0 0 40px var(--orange-glow), 0 10px 30px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

/* Price Tag on Button */
.btn .price-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  opacity: 0.8;
}

/* Stats Bar */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--black-border);
}

.stat {
  text-align: center;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  color: var(--cyan-primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Sections */
.section {
  position: relative;
  z-index: 2;
  padding: var(--space-2xl) var(--space-lg);
}

.section-dark {
  background: var(--black-surface);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

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

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.section-desc {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  background: var(--black-elevated);
  border: 1px solid var(--black-border);
  padding: var(--space-lg);
  position: relative;
  transition: all 0.3s ease;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-drift);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.feature-card:hover {
  border-color: var(--cyan-dim);
  transform: translateY(-4px);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--cyan-glow);
  border: 1px solid var(--cyan-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 1.5rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--black-elevated);
  border: 1px solid var(--black-border);
  padding: var(--space-xl);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--cyan-primary);
  box-shadow: 0 0 60px var(--cyan-glow);
}

.pricing-card.featured::before {
  content: 'BEST VALUE';
  position: absolute;
  top: 0;
  right: var(--space-md);
  background: var(--cyan-primary);
  color: var(--black-void);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  transform: translateY(-50%);
}

.pricing-name {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.pricing-price {
  font-family: var(--font-mono);
  margin-bottom: var(--space-md);
}

.pricing-price .amount {
  font-size: 3rem;
  font-weight: 700;
  color: var(--cyan-primary);
}

.pricing-price .period {
  font-size: 1rem;
  color: var(--text-muted);
}

.pricing-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--black-border);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-lg);
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.pricing-features li::before {
  content: '✓';
  color: var(--cyan-primary);
  font-weight: 600;
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
  justify-content: center;
}

/* Curriculum/Roadmap */
.roadmap {
  position: relative;
}

.roadmap-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-xl);
  position: relative;
}

.roadmap-item::before {
  content: '';
  position: absolute;
  left: 50px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--black-border);
}

.roadmap-item:last-child::before {
  display: none;
}

.roadmap-marker {
  width: 100px;
  text-align: center;
  position: relative;
}

.roadmap-dot {
  width: 16px;
  height: 16px;
  background: var(--cyan-primary);
  border-radius: 50%;
  margin: 0 auto;
  box-shadow: 0 0 20px var(--cyan-glow);
}

.roadmap-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

.roadmap-content {
  background: var(--black-elevated);
  border: 1px solid var(--black-border);
  padding: var(--space-lg);
}

.roadmap-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.roadmap-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.roadmap-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}

.tag {
  background: var(--black-void);
  border: 1px solid var(--black-border);
  padding: 0.25rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Testimonial / Quote */
.quote-block {
  background: var(--black-elevated);
  border-left: 3px solid var(--cyan-primary);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
}

.quote-text {
  font-size: 1.25rem;
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.quote-author {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--cyan-primary);
}

/* CTA Section */
.cta-section {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: linear-gradient(180deg, var(--black-void) 0%, var(--black-surface) 50%, var(--black-void) 100%);
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--cyan-glow) 0%, transparent 70%);
  pointer-events: none;
}

.cta-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
  position: relative;
}

.cta-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto var(--space-xl);
  position: relative;
}

.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

/* Footer */
.footer {
  background: var(--black-surface);
  border-top: 1px solid var(--black-border);
  padding: var(--space-xl) var(--space-lg);
  position: relative;
  z-index: 2;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

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

/* About Page Specific */
.about-hero {
  padding-top: 120px;
  min-height: 60vh;
  display: flex;
  align-items: center;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 1;
  background: var(--black-elevated);
  border: 1px solid var(--black-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.about-content h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.about-content p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

/* Code Block Style */
.code-block {
  background: var(--black-void);
  border: 1px solid var(--black-border);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--cyan-primary);
  overflow-x: auto;
  margin: var(--space-md) 0;
}

.code-block .comment {
  color: var(--text-muted);
}

/* Topic List */
.topic-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-sm);
}

.topic-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--black-elevated);
  border: 1px solid var(--black-border);
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.topic-item:hover {
  border-color: var(--cyan-dim);
  transform: translateX(4px);
}

.topic-item::before {
  content: '→';
  color: var(--cyan-primary);
  font-family: var(--font-mono);
}

/* Responsive */
@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--black-surface);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--black-border);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-cta {
    display: none;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-bar {
    flex-wrap: wrap;
    gap: var(--space-lg);
  }
  
  .roadmap-item {
    grid-template-columns: 60px 1fr;
  }
  
  .roadmap-item::before {
    left: 30px;
  }
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero-cta-group {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

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

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
  opacity: 0;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--black-void);
}

::-webkit-scrollbar-thumb {
  background: var(--black-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--cyan-dim);
}