:root {
  --black: #060608;
  --black-2: #0c0d12;
  --black-3: #121319;
  --neon-green: #39ff8a;
  --neon-cyan: #35e6ff;
  --neon-pink: #ff3df0;
  --neon-purple: #a855f7;
  --text: #f2f3f7;
  --text-dim: #9a9caa;
  --border: rgba(255,255,255,0.08);
  --font-en: 'Space Grotesk', sans-serif;
  --font-kr: 'Noto Sans KR', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--text);
  font-family: var(--font-kr);
  overflow-x: hidden;
  line-height: 1.6;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Neon text */
.neon-text {
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-green) 45%, var(--neon-pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: none;
  filter: drop-shadow(0 0 14px rgba(53,230,255,0.55)) drop-shadow(0 0 26px rgba(255,61,240,0.35));
}

/* Header */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(6,6,8,0.65);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
.header.scrolled {
  border-bottom-color: var(--border);
  background: rgba(6,6,8,0.9);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-mark { display: block; flex-shrink: 0; }
.logo-text {
  font-family: var(--font-kr);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -0.3px;
}

.nav {
  display: flex;
  gap: 36px;
}
.nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  transition: color .2s ease;
}
.nav a:hover { color: var(--neon-cyan); }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  z-index: 200;
}
.menu-toggle span {
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-green));
  color: #05070a;
  box-shadow: 0 0 24px rgba(53,230,255,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 32px rgba(53,230,255,0.55); }
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--neon-cyan); color: var(--neon-cyan); }
.btn-nav {
  padding: 10px 20px;
  font-size: 13px;
}
.btn-full { width: 100%; padding: 15px; font-size: 15px; }

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 76px;
  overflow: hidden;
}
.hero-space {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 20%, #0c0d1c 0%, var(--black) 65%);
}
.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 900px;
  background: radial-gradient(circle, rgba(53,230,255,0.16) 0%, rgba(168,85,247,0.10) 40%, transparent 70%);
  filter: blur(20px);
}
.hero-glow2 {
  position: absolute;
  bottom: -25%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(255,61,240,0.14) 0%, rgba(53,230,255,0.08) 45%, transparent 70%);
  filter: blur(30px);
}
.stars-layer {
  position: absolute;
  inset: -10%;
  pointer-events: none;
  background-repeat: repeat;
}
.stars-layer.small {
  background-image:
    radial-gradient(1px 1px at 10% 20%, #fff, transparent 100%),
    radial-gradient(1px 1px at 35% 65%, #fff, transparent 100%),
    radial-gradient(1px 1px at 60% 15%, #fff, transparent 100%),
    radial-gradient(1px 1px at 80% 55%, #fff, transparent 100%),
    radial-gradient(1px 1px at 25% 85%, #fff, transparent 100%),
    radial-gradient(1px 1px at 90% 80%, #fff, transparent 100%),
    radial-gradient(1px 1px at 50% 40%, #fff, transparent 100%),
    radial-gradient(1px 1px at 5% 55%, #fff, transparent 100%);
  background-size: 260px 260px;
  opacity: 0.55;
  animation: skyTwinkle 5s ease-in-out infinite;
}
.stars-layer.mid {
  background-image:
    radial-gradient(1.5px 1.5px at 15% 30%, #35e6ff, transparent 100%),
    radial-gradient(1.5px 1.5px at 45% 70%, #fff, transparent 100%),
    radial-gradient(1.5px 1.5px at 70% 20%, #fff, transparent 100%),
    radial-gradient(1.5px 1.5px at 85% 60%, #ff3df0, transparent 100%),
    radial-gradient(1.5px 1.5px at 30% 50%, #fff, transparent 100%),
    radial-gradient(1.5px 1.5px at 95% 35%, #fff, transparent 100%);
  background-size: 420px 420px;
  opacity: 0.65;
  animation: skyTwinkle 7s ease-in-out infinite 1.5s;
}
@keyframes skyTwinkle {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}
.constellation-graph {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.95;
}
.constellation-graph .tw {
  animation: starTwinkle 3s ease-in-out infinite;
  transform-box: fill-box;
  transform-origin: center;
}
@keyframes starTwinkle {
  0%, 100% { opacity: 0.25; }
  50% { opacity: 1; }
}
.graph-line {
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  animation: drawLine 2.2s ease-out .2s forwards;
}
@keyframes drawLine {
  to { stroke-dashoffset: 0; }
}
.graph-nodes .node {
  opacity: 0;
  animation: nodeAppear .5s ease forwards;
}
@keyframes nodeAppear {
  to { opacity: 1; }
}
.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-inner::before {
  content: "";
  position: absolute;
  inset: -60px -24px;
  background: radial-gradient(ellipse 65% 75% at 50% 50%, rgba(6,6,8,0.65) 0%, rgba(6,6,8,0.25) 55%, transparent 80%);
  z-index: -1;
  pointer-events: none;
}
.hero h1, .hero-desc, .eyebrow {
  text-shadow: 0 4px 24px rgba(0,0,0,0.6);
}
.eyebrow {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--neon-cyan);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 24px;
}
.hero-desc {
  color: var(--text-dim);
  font-size: 16px;
  max-width: 640px;
  margin: 0 auto 40px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.scroll-indicator {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 2px solid var(--border);
  border-radius: 20px;
}
.scroll-indicator span {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--neon-cyan);
  border-radius: 2px;
  animation: scrollDown 1.6s infinite;
}
@keyframes scrollDown {
  0% { opacity: 1; top: 8px; }
  100% { opacity: 0; top: 22px; }
}

/* Stats */
.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 56px 0;
  background: var(--black-2);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-num {
  font-family: var(--font-en);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  color: var(--text);
}
.stat-plus {
  font-family: var(--font-en);
  font-size: 22px;
  color: var(--neon-cyan);
  font-weight: 700;
}
.stat p {
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 6px;
}

/* Sections */
.section { padding: 120px 0; }
.section-alt { background: var(--black-2); }
.section-tag {
  font-family: var(--font-en);
  color: var(--neon-pink);
  font-size: 13px;
  letter-spacing: 3px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 900;
  margin-bottom: 20px;
  line-height: 1.35;
}
.section-desc {
  color: var(--text-dim);
  font-size: 15px;
  max-width: 600px;
  margin-bottom: 56px;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.about-card {
  background: var(--black-3);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  transition: border-color .25s ease, transform .25s ease;
}
.about-card:hover {
  border-color: var(--neon-cyan);
  transform: translateY(-4px);
}
.about-num {
  font-family: var(--font-en);
  color: var(--neon-purple);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}
.about-card h3 { font-size: 18px; margin-bottom: 10px; }
.about-card p { color: var(--text-dim); font-size: 14px; }

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.service-card {
  background: var(--black-3);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px 24px;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.service-card:hover {
  border-color: var(--neon-pink);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(255,61,240,0.12);
}
.service-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  color: #05070a;
}
.service-card h3 { font-size: 17px; margin-bottom: 8px; }
.service-card p { color: var(--text-dim); font-size: 14px; }

/* Process */
.process-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.process-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  position: relative;
  background: var(--black-3);
}
.process-step {
  font-family: var(--font-en);
  color: var(--neon-green);
  font-size: 13px;
  letter-spacing: 2px;
}
.process-item h3 { font-size: 19px; margin: 14px 0 10px; }
.process-item p { color: var(--text-dim); font-size: 14px; }

/* CTA banner */
.cta-banner {
  padding: 100px 0;
  text-align: center;
  background: linear-gradient(180deg, var(--black-2), var(--black));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta-banner h2 { font-size: clamp(24px, 4vw, 34px); font-weight: 900; margin-bottom: 14px; }
.cta-banner p { color: var(--text-dim); margin-bottom: 34px; }

/* Contact */
.contact-wrap {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
}
.contact-form {
  background: var(--black-3);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-row { display: flex; gap: 16px; }
.contact-form input,
.contact-form textarea {
  width: 100%;
  background: var(--black-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  resize: none;
  transition: border-color .2s ease;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--neon-cyan);
}
.form-note {
  color: var(--text-dim);
  font-size: 12px;
  text-align: center;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.info-item {
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
}
.info-item span {
  font-family: var(--font-en);
  color: var(--neon-pink);
  font-size: 12px;
  letter-spacing: 2px;
}
.info-item p { margin-top: 8px; font-size: 15px; }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer .logo-text { font-size: 15px; }
.footer p { color: var(--text-dim); font-size: 13px; }

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 860px) {
  .nav, .btn-nav { display: none; }
  .menu-toggle { display: flex; }
  .about-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-list { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 560px) {
  .stats-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .constellation-graph { opacity: 0.55; }
  .hero-inner::before { inset: -40px -16px; }
}

@media (max-width: 520px) {
  .services-grid { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
  .hero-cta { flex-direction: column; align-items: center; }
}

/* Mobile nav open state */
.nav.open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 76px;
  left: 0;
  right: 0;
  background: rgba(6,6,8,0.98);
  padding: 30px 24px;
  gap: 22px;
  border-bottom: 1px solid var(--border);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }