:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --border: rgba(59, 130, 246, 0.15);
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-glow: rgba(59, 130, 246, 0.4);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Noto Sans KR', sans-serif;
  --header-h: 72px;
  --radius: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1140px, 92vw);
  margin: 0 auto;
}

#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}

.glow-1 {
  width: 500px;
  height: 500px;
  top: -100px;
  right: -100px;
  background: rgba(37, 99, 235, 0.15);
}

.glow-2 {
  width: 400px;
  height: 400px;
  bottom: 20%;
  left: -100px;
  background: rgba(59, 130, 246, 0.1);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  transition: background var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(10, 14, 23, 0.9);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

.logo-icon {
  color: var(--blue-500);
  font-size: 0.9rem;
}

.logo-accent {
  color: var(--blue-400);
  font-weight: 500;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--blue-500);
  transition: width var(--transition);
}

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

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

.nav-cta {
  padding: 0.5rem 1.25rem;
  background: var(--blue-600);
  border-radius: 6px;
  color: white !important;
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  background: var(--blue-500);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

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

.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
}

.hero-content {
  max-width: 720px;
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--blue-400);
  margin-bottom: 1.5rem;
  background: rgba(59, 130, 246, 0.05);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1.25rem;
}

.text-gradient {
  background: linear-gradient(135deg, var(--blue-400), var(--blue-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font-body);
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
  color: white;
  box-shadow: 0 4px 24px var(--blue-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--blue-glow);
}

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

.btn-outline:hover {
  border-color: var(--blue-500);
  color: var(--blue-400);
}

.btn-full {
  width: 100%;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--blue-400);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hero-drone {
  position: absolute;
  right: 8%;
  top: 50%;
  transform: translateY(-50%);
  width: 200px;
  opacity: 0.6;
  animation: float 6s ease-in-out infinite;
}

.hero-drone svg {
  width: 100%;
}

.rotor {
  transform-origin: center;
  animation: spin 2s linear infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(-50%) translateX(0); }
  50% { transform: translateY(calc(-50% - 20px)) translateX(10px); }
}

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

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 40px;
  border: 2px solid var(--border);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-indicator span {
  width: 4px;
  height: 8px;
  background: var(--blue-500);
  border-radius: 2px;
  animation: scroll-bounce 2s infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: 0.3; }
}

.section {
  position: relative;
  z-index: 1;
  padding: 6rem 0;
}

.section-header {
  margin-bottom: 3rem;
}

.section-tag {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--blue-500);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.intro-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  transition: var(--transition);
}

.intro-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.intro-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.intro-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--blue-400);
}

.intro-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.about-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 3rem;
  line-height: 1.8;
}

.about-lead strong {
  color: var(--text-primary);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.team-card {
  padding: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  transition: var(--transition);
}

.team-card:hover {
  border-color: rgba(59, 130, 246, 0.35);
}

.team-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.team-name {
  font-size: 1.3rem;
  margin-bottom: 1.25rem;
}

.team-name span {
  font-size: 0.85rem;
  color: var(--blue-400);
  font-weight: 500;
  margin-left: 0.5rem;
}

.team-career li {
  position: relative;
  padding-left: 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.team-career li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--blue-500);
}

.partners {
  background: rgba(17, 24, 39, 0.4);
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}

.partner-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  min-height: 100px;
  transition: var(--transition);
}

.partner-card:hover {
  border-color: var(--blue-500);
  background: rgba(59, 130, 246, 0.05);
  transform: scale(1.03);
}

.partner-card span {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.partner-card small {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.business-card {
  position: relative;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-600), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.business-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-4px);
}

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

.business-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: rgba(59, 130, 246, 0.2);
  display: block;
  margin-bottom: 0.75rem;
}

.business-card h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--blue-400);
}

.business-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  padding: 3rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.5);
  backdrop-filter: blur(12px);
}

.contact-desc {
  color: var(--text-secondary);
  margin: 1rem 0 2rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--blue-500);
  margin-bottom: 0.35rem;
}

.contact-item p {
  color: var(--text-secondary);
}

.contact-item a {
  color: var(--blue-400);
  transition: color var(--transition);
}

.contact-item a:hover {
  color: var(--blue-500);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  padding: 0.85rem 1rem;
  background: rgba(10, 14, 23, 0.6);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: border-color var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

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

.footer {
  position: relative;
  z-index: 1;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .hero-drone {
    display: none;
  }

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

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 14, 23, 0.97);
    backdrop-filter: blur(16px);
    padding: 2rem;
    gap: 1.5rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    border-bottom: 1px solid var(--border);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .intro-grid,
  .team-grid,
  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .business-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .section {
    padding: 4rem 0;
  }

  .contact-wrapper {
    padding: 2rem;
    gap: 2rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}