/* ============================================
   LeadToLab (리드투랩) - Design System
   Premium Dark Theme Corporate Website
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

/* ============================================
   1. CSS Custom Properties
   ============================================ */
:root {
  /* Colors - Dark Theme */
  --color-bg-primary: #060a1a;
  --color-bg-secondary: #0c1230;
  --color-bg-tertiary: #111940;
  --color-bg-card: rgba(255, 255, 255, 0.03);
  --color-bg-card-hover: rgba(255, 255, 255, 0.06);
  --color-bg-glass: rgba(255, 255, 255, 0.05);

  /* Accent Colors */
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1d4ed8;
  --color-accent: #60a5fa;
  --color-accent-light: #93c5fd;
  --color-secondary: #8b5cf6;
  --color-tertiary: #06b6d4;

  /* Text Colors */
  --color-text-primary: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-text-accent: #60a5fa;

  /* Border Colors */
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);
  --color-border-active: rgba(59, 130, 246, 0.5);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --gradient-hero: linear-gradient(135deg, #0c1230 0%, #1a1050 50%, #0c1230 100%);
  --gradient-card: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.05) 100%);
  --gradient-text: linear-gradient(135deg, #60a5fa 0%, #a78bfa 50%, #60a5fa 100%);

  /* Typography */
  --font-primary: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: 'Inter', 'Pretendard', sans-serif;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.6);
  --glow-primary: 0 0 20px rgba(37, 99, 235, 0.3);
  --glow-accent: 0 0 30px rgba(59, 130, 246, 0.2);

  /* Layout */
  --nav-height: 72px;
  --container-max: 1200px;
  --container-narrow: 800px;
}

/* ============================================
   2. CSS Reset & Base Styles
   ============================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: rgba(59, 130, 246, 0.3);
  color: #fff;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg-primary); }
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.25); }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-text-accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-accent-light); }
ul, ol { list-style: none; }

/* ============================================
   3. Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }
p { color: var(--color-text-secondary); line-height: 1.8; }

.gradient-text {
  background: var(--gradient-text);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-primary-light);
  margin-bottom: var(--space-4);
  position: relative;
  padding-left: 20px;
}
.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
}

/* ============================================
   4. Layout
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section {
  padding: var(--space-9) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.section-header h2 { margin-bottom: var(--space-4); }
.section-header p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
}

/* ============================================
   5. Navigation
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: all var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(6, 10, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: white;
}

.nav-logo span.logo-highlight {
  color: var(--color-accent);
}

.logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  border-radius: 4px;
  transition: opacity var(--transition-fast);
}

.logo-img:hover {
  opacity: 0.85;
}

.footer-brand .logo-img {
  height: 34px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transition: width var(--transition-normal);
}

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

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

.nav-cta {
  padding: 10px 24px !important;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  color: white !important;
  font-weight: 600 !important;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal) !important;
  box-shadow: var(--glow-primary);
}
.nav-cta::after { display: none !important; }
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(37, 99, 235, 0.5);
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: var(--space-3);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 3px;
}

.lang-btn {
  padding: 5px 12px;
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-primary);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.02em;
}

.lang-btn:hover {
  color: var(--color-text-primary);
}

.lang-btn.active {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
}

/* Mobile Menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ============================================
   6. Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
  padding-top: var(--nav-height);
}

/* Animated Background Orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: rgba(37, 99, 235, 0.3);
  top: -10%;
  right: -5%;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: rgba(124, 58, 237, 0.25);
  bottom: -10%;
  left: -5%;
  animation-delay: -3s;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: rgba(6, 182, 212, 0.2);
  top: 40%;
  left: 40%;
  animation-delay: -5s;
}

/* Grid Pattern Overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 var(--space-5);
}

.hero-content h1 {
  margin-bottom: var(--space-5);
  font-weight: 800;
}

.hero-content .hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-7);
  line-height: 1.8;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-7);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 20px;
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  backdrop-filter: blur(10px);
}

.hero-badge .badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary-light);
  animation: pulse 2s ease-in-out infinite;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  animation: fadeInUp 1s ease 1.5s both;
}

.scroll-indicator .mouse {
  width: 24px;
  height: 38px;
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator .mouse::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  animation: scrollMouse 2s ease-in-out infinite;
}

/* ============================================
   7. Cards
   ============================================ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--glow-accent);
}

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

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  font-size: 1.5rem;
  box-shadow: var(--glow-primary);
}

.card-icon.accent { background: var(--gradient-accent); }
.card-icon.secondary { background: linear-gradient(135deg, #8b5cf6, #a855f7); }

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--color-text-primary);
}

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

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: gap var(--transition-fast);
}
.card-link:hover { gap: var(--space-3); }

/* ============================================
   8. Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 32px;
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--glow-primary);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(37, 99, 235, 0.5);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  color: var(--color-text-primary);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}
.btn-outline:hover {
  background: rgba(96, 165, 250, 0.1);
  transform: translateY(-2px);
  color: var(--color-accent);
}

/* ============================================
   9. Business Area Tabs
   ============================================ */
.business-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-7);
  flex-wrap: wrap;
}

.business-tab {
  padding: 12px 28px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.business-tab:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text-primary);
}

.business-tab.active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: white;
  box-shadow: var(--glow-primary);
}

.tab-content {
  display: none;
  animation: fadeInUp 0.5s ease both;
}

.tab-content.active {
  display: block;
}

.tab-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: center;
}

.tab-panel-text h3 {
  margin-bottom: var(--space-4);
}

.tab-panel-text p {
  margin-bottom: var(--space-5);
}

.tab-panel-visual {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.tab-panel-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  opacity: 0.5;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.feature-item .check-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background: rgba(37, 99, 235, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 0.7rem;
  margin-top: 2px;
}

/* ============================================
   10. Timeline (연혁)
   ============================================ */
.timeline {
  position: relative;
  padding: var(--space-5) 0;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--color-border), var(--color-primary-light), var(--color-border), transparent);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--space-7);
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
  text-align: right;
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-right: var(--space-7);
  margin-left: 0;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: var(--space-7);
}

.timeline-dot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: 3px solid var(--color-bg-primary);
  box-shadow: var(--glow-primary);
  z-index: 2;
}

.timeline-content {
  flex: 0 0 calc(50% - 40px);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.timeline-date {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
  letter-spacing: 0.05em;
}

.timeline-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================
   11. Map Container
   ============================================ */
.map-container {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  height: 400px;
  background: var(--color-bg-card);
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: none;
  filter: grayscale(0.3) brightness(0.8);
  transition: filter var(--transition-normal);
}

.map-container:hover iframe {
  filter: grayscale(0) brightness(1);
}

.location-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.location-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.location-card .icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.location-card h4 {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.location-card p {
  color: var(--color-text-primary);
  font-size: 0.95rem;
}

/* ============================================
   12. Contact Form
   ============================================ */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

.contact-info {
  padding: var(--space-6);
}

.contact-info h3 {
  margin-bottom: var(--space-5);
}

.contact-info p {
  margin-bottom: var(--space-6);
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.contact-method:hover {
  border-color: var(--color-border-hover);
  transform: translateX(4px);
}

.contact-method .method-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-method .method-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.contact-method .method-value {
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: 0.95rem;
}

.contact-form-wrapper {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
  background: rgba(255, 255, 255, 0.05);
}

.form-group select option {
  background-color: #1e293b; /* 어두운 배경색 지정 */
  color: #f8fafc; /* 밝은 글자색 지정 */
}

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

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.btn-submit {
  width: 100%;
  padding: 16px;
  font-size: 1rem;
}

/* ============================================
   13. News / Empty State
   ============================================ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.news-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

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

.news-card-image {
  height: 200px;
  background: var(--gradient-card);
  position: relative;
}

.news-card-body {
  padding: var(--space-5);
}

.news-card-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.news-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.empty-state {
  text-align: center;
  padding: var(--space-10) var(--space-5);
}

.empty-state-icon {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  animation: pulse 3s ease-in-out infinite;
}

.empty-state h3 {
  margin-bottom: var(--space-3);
}

.empty-state p {
  max-width: 400px;
  margin: 0 auto;
}

/* ============================================
   14. Page Header (Sub Pages)
   ============================================ */
.page-header {
  padding: calc(var(--nav-height) + var(--space-9)) 0 var(--space-8);
  text-align: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header h1 {
  margin-bottom: var(--space-4);
}

.page-header p {
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   15. Stats Section
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.stat-item {
  text-align: center;
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* ============================================
   16. Footer
   ============================================ */
.footer {
  padding: var(--space-8) 0 var(--space-6);
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}

.footer-brand .nav-logo {
  margin-bottom: var(--space-4);
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 300px;
}

.footer-column h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-column a {
  display: block;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  padding: var(--space-1) 0;
  transition: all var(--transition-fast);
}

.footer-column a:hover {
  color: var(--color-text-primary);
  transform: translateX(4px);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ============================================
   17. CTA Section
   ============================================ */
.cta-section {
  text-align: center;
  padding: var(--space-9) 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  opacity: 0.3;
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  margin-bottom: var(--space-4);
}

.cta-section p {
  max-width: 500px;
  margin: 0 auto var(--space-6);
  font-size: 1.1rem;
}

/* ============================================
   18. Process Flow
   ============================================ */
.process-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-5);
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5);
  min-width: 140px;
}

.process-step .step-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--glow-primary);
}

.process-step .step-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-align: center;
}

.process-arrow {
  font-size: 1.5rem;
  color: var(--color-text-muted);
}

/* ============================================
   19. Toast Notification
   ============================================ */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  padding: 16px 24px;
  background: rgba(16, 185, 129, 0.95);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.95rem;
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.error {
  background: rgba(239, 68, 68, 0.95);
}

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

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

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -30px) scale(1.05); }
  66% { transform: translate(-15px, 15px) scale(0.95); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.95); }
}

@keyframes shimmer {
  0% { background-position: 0% center; }
  100% { background-position: 200% center; }
}

@keyframes scrollMouse {
  0% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50% { transform: translateX(-50%) translateY(10px); opacity: 0; }
  100% { transform: translateX(-50%) translateY(0); opacity: 1; }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Scroll Animation Classes */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
  opacity: 1;
}

/* Stagger delays */
.fade-in-up[data-delay="1"] { transition-delay: 0.1s; }
.fade-in-up[data-delay="2"] { transition-delay: 0.2s; }
.fade-in-up[data-delay="3"] { transition-delay: 0.3s; }
.fade-in-up[data-delay="4"] { transition-delay: 0.4s; }
.fade-in-up[data-delay="5"] { transition-delay: 0.5s; }

/* Page Load Animation */
.page-loaded .hero-content > * {
  animation: fadeInUp 0.8s ease both;
}
.page-loaded .hero-content > *:nth-child(1) { animation-delay: 0.2s; }
.page-loaded .hero-content > *:nth-child(2) { animation-delay: 0.4s; }
.page-loaded .hero-content > *:nth-child(3) { animation-delay: 0.6s; }
.page-loaded .hero-content > *:nth-child(4) { animation-delay: 0.8s; }
.page-loaded .hero-content > *:nth-child(5) { animation-delay: 1.0s; }

/* ============================================
   21. Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-gradient { background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.mt-1 { margin-top: var(--space-2); }
.mt-2 { margin-top: var(--space-4); }
.mt-3 { margin-top: var(--space-5); }
.mt-4 { margin-top: var(--space-6); }
.mt-5 { margin-top: var(--space-8); }
.mb-1 { margin-bottom: var(--space-2); }
.mb-2 { margin-bottom: var(--space-4); }
.mb-3 { margin-bottom: var(--space-5); }
.mb-4 { margin-bottom: var(--space-6); }
.mb-5 { margin-bottom: var(--space-8); }
.hidden { display: none !important; }

/* ============================================
   22. Responsive Design
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .tab-panel { grid-template-columns: 1fr; }
  .contact-section { grid-template-columns: 1fr; }
}

/* Mobile Landscape */
@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(6, 10, 26, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-6);
    transition: right var(--transition-normal);
    border-left: 1px solid var(--color-border);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .cards-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }

  .timeline::before { left: 20px; }
  .timeline-dot { left: 20px; }
  .timeline-item,
  .timeline-item:nth-child(odd) {
    flex-direction: row;
    text-align: left;
    padding-left: 50px;
  }
  .timeline-item:nth-child(odd) .timeline-content,
  .timeline-item:nth-child(even) .timeline-content {
    margin-left: 0;
    margin-right: 0;
    flex: 1;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }

  .section { padding: var(--space-8) 0; }
  .form-row { grid-template-columns: 1fr; }

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

  .process-flow { flex-direction: column; }
  .process-arrow { transform: rotate(90deg); }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile Portrait */
@media (max-width: 480px) {
  .container { padding: 0 var(--space-4); }
  .hero-content h1 { font-size: 1.8rem; }
  .section-header h2 { font-size: 1.6rem; }
  .stat-number { font-size: 2rem; }
  .stats-grid { grid-template-columns: 1fr; }
}

/* ============================================
   Media Card & Overlay Styles (Added for UI Upgrade)
   ============================================ */
.media-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.media-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}
.media-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom: 1px solid var(--color-border);
}
.media-card-content {
  padding: var(--space-5);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.media-card .card-icon {
  margin-bottom: var(--space-3);
  width: 48px;
  height: 48px;
  font-size: 1.5rem;
}

/* Image Split Panel (for business.html) */
.tab-panel-visual.media-visual {
  padding: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}
.tab-panel-visual.media-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 300px;
  transition: transform 0.5s ease;
}
.tab-panel-visual.media-visual:hover img {
  transform: scale(1.05);
}

/* Hero Overlay Background */
.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background-image: url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?q=80&w=2000&auto=format&fit=crop');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  mix-blend-mode: overlay;
  pointer-events: none;
  z-index: 1;
}
.hero-content {
  z-index: 2; /* over the background */
}

/* About Company Overlay Card */
.company-overlay-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  background: linear-gradient(135deg, rgba(15,23,42,0.95) 0%, rgba(30,41,59,0.9) 50%, rgba(15,23,42,0.95) 100%);
}
.company-overlay-bg {
  display: none;
}
.company-overlay-bg::after {
  display: none;
}
.company-overlay-content {
  position: relative;
  z-index: 1;
  padding: var(--space-6);
  width: 100%;
  text-align: center;
}
.company-logo-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-5);
}
.company-logo-wrap img {
  height: 48px;
  filter: brightness(1.1);
}
.company-info-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.company-info-item {
  text-align: center;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  transition: background 0.3s ease;
}
.company-info-item:hover {
  background: rgba(255,255,255,0.08);
}
.company-info-item .info-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  display: block;
  margin-bottom: 4px;
}
.company-info-item .info-value.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.5rem;
}
.company-info-item .info-label {
  font-size: 0.8rem;
  color: #94a3b8;
  letter-spacing: 0.02em;
}

/* ============================================
   Navigation Dropdown
   ============================================ */
.nav-dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--color-bg-card);
  min-width: 220px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 100;
  display: flex;
  flex-direction: column;
  padding: var(--space-2) 0;
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-menu a {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  display: block;
}

.dropdown-menu a:hover {
  background: var(--color-bg-secondary);
  color: var(--color-accent);
  padding-left: var(--space-5);
}

.download-card:hover { transform: translateY(-5px); border-color: var(--color-primary-light); }

/* Hero Download Buttons */
.btn-download-hero {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--font-primary);
  color: rgba(255, 255, 255, 0.75);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-download-hero:hover {
  color: #fff;
  background: rgba(59, 130, 246, 0.2);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
}

.btn-download-hero i {
  font-size: 0.8rem;
}