:root {
  /* Core Brand Colors */
  --primary-color: #00d4ff;
  --secondary-color: #ff0080;
  --background-primary: #0a0a0a;
  --background-secondary: #111111;
  --background-tertiary: #1a1a1a;
  --button-color: #00d4ff;
  
  /* Neon & Accent Colors */
  --neon-cyan: #00d4ff;
  --neon-pink: #ff0080;
  --neon-green: #00ff88;
  --neon-purple: #8a2be2;
  --warning-color: #ffff00;
  --success-color: #00ff88;
  --error-color: #ff1744;
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-muted: #666666;
  --text-inverse: #0a0a0a;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'JetBrains Mono', 'Fira Code', monospace;
  --font-korean: 'Noto Sans KR', sans-serif;
  
  /* 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;
  
  /* Border & Radius */
  --border-width: 2px;
  --border-radius-sharp: 0;
  --border-radius-soft: 4px;
  --border-radius-rounded: 8px;
  --border-color: #000000;
  
  /* Shadows - Neo-Brutalist style */
  --shadow-sharp: 4px 4px 0px #000000;
  --shadow-hover: 6px 6px 0px #000000;
  --shadow-elevated: 8px 8px 0px #000000;
  --shadow-card: 4px 4px 0px var(--primary-color);
  --shadow-card-hover: 6px 6px 0px var(--primary-color);
  
  /* Neon Glows */
  --glow-cyan: 0 0 20px #00d4ff, 0 0 40px #00d4ff, 0 0 60px #00d4ff;
  --glow-pink: 0 0 20px #ff0080, 0 0 40px #ff0080, 0 0 60px #ff0080;
  --glow-green: 0 0 20px #00ff88, 0 0 40px #00ff88, 0 0 60px #00ff88;
  --glow-purple: 0 0 20px #8a2be2, 0 0 40px #8a2be2, 0 0 60px #8a2be2;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-primary);
  background-color: var(--background-primary);
  color: var(--text-primary);
  line-height: 1.6;
  letter-spacing: -0.01em;
  overflow-x: hidden;
}

/* Korean Text Styling */
.ko-text {
  font-family: var(--font-korean);
  font-weight: 300;
  letter-spacing: 0.02em;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 var(--space-lg) 0;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  margin-bottom: var(--space-xl);
  text-shadow: 2px 2px 0px var(--primary-color);
}

h2 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin-bottom: var(--space-lg);
  text-shadow: 2px 2px 0px var(--secondary-color);
}

h3 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: var(--space-md);
  color: var(--primary-color);
}

h4 {
  font-size: clamp(1.25rem, 3vw, 2rem);
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

p {
  margin: 0 0 var(--space-md) 0;
  font-size: 1.125rem;
  color: var(--text-secondary);
}

small {
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

a:hover {
  color: var(--secondary-color);
  text-shadow: 0 0 10px currentColor;
}

a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Section Backgrounds with High Contrast */
.section {
  padding: var(--space-4xl) 0;
  position: relative;
}

.section-dark {
  background-color: var(--background-primary);
}

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

.section-light {
  background-color: var(--background-tertiary);
}

/* Grid System for Layouts */
.grid {
  display: grid;
  gap: var(--space-xl);
}

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

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Neo-Brutalist Card Components */
.card {
  background-color: var(--background-secondary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-sharp);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translate(-2px, -2px);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

.card-elevated {
  box-shadow: var(--shadow-elevated);
  border-radius: var(--border-radius-soft);
}

.card-elevated:hover {
  transform: translate(-4px, -4px);
  box-shadow: 12px 12px 0px #000000;
}

/* Button System - Bold & Graphic Style */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-sharp);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  text-decoration: none;
  min-height: 48px;
}

.btn-primary {
  background-color: var(--button-color);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sharp);
}

.btn-primary:hover {
  background-color: var(--neon-green);
  box-shadow: var(--shadow-hover);
  transform: translate(-2px, -2px);
  color: var(--text-inverse);
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: var(--text-primary);
  box-shadow: var(--shadow-sharp);
}

.btn-secondary:hover {
  background-color: var(--neon-purple);
  box-shadow: var(--shadow-hover);
  transform: translate(-2px, -2px);
  color: var(--text-primary);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary-color);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sharp);
}

.btn-outline:hover {
  background-color: var(--primary-color);
  color: var(--text-inverse);
  box-shadow: var(--shadow-hover);
  transform: translate(-2px, -2px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: transparent;
  box-shadow: none;
}

.btn-ghost:hover {
  color: var(--primary-color);
  background-color: rgba(0, 212, 255, 0.1);
  border-color: var(--primary-color);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  min-height: 36px;
}

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: 1.25rem;
  min-height: 60px;
}

.btn-xl {
  padding: var(--space-xl) var(--space-3xl);
  font-size: 1.5rem;
  min-height: 72px;
}

/* Form Elements - Neo-Brutalist Style */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.form-input {
  width: 100%;
  padding: var(--space-md);
  background-color: var(--background-secondary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-sharp);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: all var(--transition-normal);
  box-shadow: 2px 2px 0px rgba(0, 0, 0, 0.3);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: var(--shadow-card);
  background-color: var(--background-primary);
}

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

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

.form-select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--space-sm) center;
  background-repeat: no-repeat;
  background-size: 16px;
  padding-right: var(--space-2xl);
  appearance: none;
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
  width: 20px;
  height: 20px;
  accent-color: var(--primary-color);
  cursor: pointer;
}

/* Navigation - Bold Corporate Style */
.nav {
  background-color: var(--background-primary);
  border-bottom: var(--border-width) solid var(--primary-color);
  padding: var(--space-md) 0;
  position: relative;
  z-index: 1000;
}

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

.nav-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary-color);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-shadow: 2px 2px 0px #000000;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-lg);
}

.nav-link {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  border: var(--border-width) solid transparent;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
  background-color: rgba(0, 212, 255, 0.1);
  box-shadow: var(--shadow-sharp);
}

/* Header with Neon Effects */
.header {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 0, 128, 0.3) 0%, transparent 50%),
    var(--background-primary);
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(45deg, transparent 40%, rgba(0, 212, 255, 0.1) 50%, transparent 60%),
    linear-gradient(-45deg, transparent 40%, rgba(255, 0, 128, 0.1) 50%, transparent 60%);
  animation: scanlines 3s linear infinite;
  pointer-events: none;
}

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

.header-content {
  text-align: center;
  z-index: 10;
  position: relative;
  max-width: 800px;
  padding: var(--space-xl);
}

.header-title {
  font-size: clamp(3rem, 10vw, 6rem);
  margin-bottom: var(--space-lg);
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  filter: drop-shadow(4px 4px 0px #000000);
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from { filter: drop-shadow(4px 4px 0px #000000) drop-shadow(0 0 20px var(--primary-color)); }
  to { filter: drop-shadow(4px 4px 0px #000000) drop-shadow(0 0 30px var(--secondary-color)); }
}

.header-subtitle {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  font-family: var(--font-korean);
}

/* Neon Glow Effects */
.neon-glow {
  text-shadow: var(--glow-cyan);
}

.neon-glow-pink {
  text-shadow: var(--glow-pink);
}

.neon-glow-green {
  text-shadow: var(--glow-green);
}

.neon-border {
  border: var(--border-width) solid var(--primary-color);
  box-shadow: 
    inset 0 0 20px rgba(0, 212, 255, 0.2),
    0 0 20px rgba(0, 212, 255, 0.5);
}

/* Feature Cards with Hover Lights */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
}

.feature-card {
  background-color: var(--background-secondary);
  border: var(--border-width) solid var(--primary-color);
  border-radius: var(--border-radius-soft);
  padding: var(--space-2xl);
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.4), transparent);
  transition: left var(--transition-slow);
}

.feature-card:hover::before {
  left: 100%;
}

.feature-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--secondary-color);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
  display: block;
  filter: grayscale(1) brightness(0.8);
  transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
  filter: grayscale(0) brightness(1);
  filter: drop-shadow(0 0 10px currentColor);
}

/* Footer */
.footer {
  background-color: var(--background-tertiary);
  border-top: var(--border-width) solid var(--primary-color);
  padding: var(--space-3xl) 0 var(--space-xl) 0;
  margin-top: var(--space-4xl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  text-align: center;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
}

/* 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(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

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

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

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .header-content {
    padding: var(--space-md);
  }
  
  .card {
    padding: var(--space-lg);
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  :root {
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
    --space-4xl: 3rem;
  }
  
  .container {
    padding: 0 var(--space-md);
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
}

/* Loading States */
.loading {
  opacity: 0.7;
  pointer-events: none;
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--primary-color);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Focus States for Accessibility */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.btn:focus,
.form-input:focus,
.nav-link:focus {
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.3);
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --border-width: 3px;
    --shadow-sharp: 6px 6px 0px #000000;
    --shadow-hover: 8px 8px 0px #000000;
  }
}

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


/* Cookie Banner Additional Styles for Tailwind */
.cookie-banner-hover-effect:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

@media (prefers-reduced-motion: reduce) {
    .cookie-banner-hover-effect:hover {
        transform: none;
    }
}