/* CSS Variables for Corporate Design System */
:root {
  /* Primary Color Palette */
  --primary-blue: #1e40af;
  --secondary-purple: #7c3aed;
  --button-cyan: #06b6d4;
  --background-dark: #0f172a;
  --footer-dark: #020617;
  
  /* Section Backgrounds */
  --section-bg-1: #0f172a;
  --section-bg-2: #1e293b;
  --section-bg-3: #334155;
  
  /* Korean-inspired Accent Colors */
  --korean-red: #dc2626;
  --korean-gold: #f59e0b;
  
  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  /* Shadows */
  --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, 0.1);
  --shadow-corporate: 0 4px 6px -1px rgba(30, 64, 175, 0.1);
  
  /* 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;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Poppins', sans-serif;
  --font-korean: 'Noto Sans KR', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--background-dark);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

h2 {
  font-size: 2.25rem;
  font-weight: 600;
}

h3 {
  font-size: 1.875rem;
  font-weight: 600;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.125rem;
}

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

a {
  color: var(--button-cyan);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-blue);
  text-decoration: underline;
}

/* Container Overrides for Full Width */
.container {
  max-width: 100% !important;
  width: 100% !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
}

.container-fluid {
  max-width: 100% !important;
  width: 100% !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
}

/* Header Styles */
.header {
  background: linear-gradient(135deg, var(--section-bg-1) 0%, var(--section-bg-2) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

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

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

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

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background-color: rgba(6, 182, 212, 0.1);
  text-decoration: none;
}

/* Korean Cultural Elements */
.korean-accent {
  position: relative;
}

.korean-accent::before {
  content: '·';
  color: var(--korean-gold);
  font-size: 1.2em;
  margin-right: var(--space-sm);
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-xl);
  font-weight: 500;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
  line-height: 1.5;
}

.btn-primary {
  background: linear-gradient(135deg, var(--button-cyan) 0%, var(--primary-blue) 100%);
  color: white;
  box-shadow: var(--shadow-corporate);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
  text-decoration: none;
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary-purple) 0%, var(--primary-blue) 100%);
  color: white;
  box-shadow: var(--shadow-corporate);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: var(--button-cyan);
  border: 2px solid var(--button-cyan);
}

.btn-outline:hover {
  background: var(--button-cyan);
  color: white;
  text-decoration: none;
}

/* Card Styles */
.card {
  background: linear-gradient(135deg, var(--section-bg-2) 0%, var(--section-bg-3) 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--button-cyan), var(--secondary-purple));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(6, 182, 212, 0.3);
}

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

.card-header {
  margin-bottom: var(--space-lg);
}

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

.card-text {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Section Styles */
.section {
  padding: var(--space-3xl) 0;
  position: relative;
}

.section-dark {
  background-color: var(--section-bg-1);
}

.section-medium {
  background-color: var(--section-bg-2);
}

.section-light {
  background-color: var(--section-bg-3);
}

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

.section-title {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--button-cyan), var(--secondary-purple));
  border-radius: 2px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--background-dark) 0%, var(--section-bg-2) 50%, var(--section-bg-1) 100%);
  padding: var(--space-3xl) 0;
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  text-align: center;
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--button-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

/* Grid 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));
}

/* Form Styles */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.form-control {
  width: 100%;
  padding: var(--space-md);
  background-color: var(--section-bg-2);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--button-cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

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

/* Footer Styles */
.footer {
  background-color: var(--footer-dark);
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-section h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  font-size: 1.125rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

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

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

.footer-links a:hover {
  color: var(--button-cyan);
  text-decoration: none;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
}

/* Utilities */
.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); }

.hidden {
  display: none;
}

.visible {
  display: block;
}

/* Korean Text Support */
.korean-text {
  font-family: var(--font-korean);
  font-weight: 400;
}

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

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

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --space-3xl: 3rem;
  }
  
  .header-nav {
    padding: 0 var(--space-md);
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .nav-menu {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .grid {
    gap: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .card {
    padding: var(--space-lg);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

/* Focus States for Accessibility */
.btn:focus,
.form-control:focus,
.nav-link:focus {
  outline: 2px solid var(--button-cyan);
  outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --text-secondary: #e2e8f0;
    --text-muted: #cbd5e1;
    --border-color: rgba(255, 255, 255, 0.3);
  }
  
  .card {
    border-width: 2px;
  }
  
  .form-control {
    border-width: 2px;
  }
}

/* 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;
    scroll-behavior: auto !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;
    }
}