:root {
  --bg: #010203;
  --panel: rgba(10, 13, 18, 0.72);
  --line: rgba(255, 255, 255, 0.08);
  --text: #f5f7fa;
  --muted: rgba(245, 247, 250, 0.66);
  --logo: #153355;
  --logo-bright: #3b5f8f;
  --white-a: #ffffff;
  --white-b: #dce3ea;
  --white-c: #99a7b4;
  --brown-a: #d0a17f;
  --brown-b: #8c5536;
  --brown-c: #3d2418;
  --blue-a: #93afd9;
  --blue-b: #35558e;
  --blue-c: #0e2148;
  --black-a: #7f8d9d;
  --black-b: #141920;
  --black-c: #030507;
  --particle-core-a: var(--white-a);
  --particle-core-b: var(--white-b);
  --particle-core-c: var(--white-c);
  --particle-glow: rgba(255, 255, 255, 0.12);
  --fragment-opacity: 0;
  --fragment-brightness: 0.92;
  --core-formation: 0;
  --shell-opacity: 0;
  --satellite-opacity: 0;
  --satellite-scale: 0.82;
  --vacancy-opacity: 0;
  --vacancy-scale: 0.72;
  --vacancy-trace-opacity: 0;
  --atlas-opacity: 0;
  --atlas-shift: 28px;
  --atlas-scale: 1;
  --atlas-origin: left bottom;
  --cluster-opacity: 1;
  --cluster-lift: 0px;
  --cluster-rotate: 0deg;
  --cluster-scale: 0.94;
  --assembly-field-opacity: 0.14;
  --convergence-ring-opacity: 0.14;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
  --container: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Manrope", "Noto Sans KR", sans-serif;
  background:
    radial-gradient(circle at 18% 14%, rgba(21, 51, 85, 0.22), transparent 28%),
    radial-gradient(circle at 74% 22%, rgba(255, 255, 255, 0.04), transparent 16%),
    linear-gradient(180deg, #010203 0%, #05070b 100%);
}

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

button {
  font: inherit;
}

.particle-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.stage-noise {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.012) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.012) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: radial-gradient(circle at center, black 50%, transparent 86%);
  opacity: 0.48;
}

.stage-beam {
  position: absolute;
  top: -15%;
  bottom: -15%;
  width: 22vw;
  filter: blur(30px);
  opacity: 0.34;
}

.stage-beam-left {
  left: 4%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(21, 51, 85, 0.14), rgba(255, 255, 255, 0));
  transform: rotate(10deg);
}

.stage-beam-right {
  right: 4%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(21, 51, 85, 0.16), rgba(255, 255, 255, 0.03));
  transform: rotate(-11deg);
}

.particle-cluster {
  position: absolute;
  left: 50%;
  top: 53%;
  width: min(78vw, 900px);
  aspect-ratio: 1;
  transform: translate(-50%, calc(-50% - var(--cluster-lift))) rotate(var(--cluster-rotate)) scale(var(--cluster-scale));
  opacity: var(--cluster-opacity);
}

.assembly-field,
.convergence-ring,
.particle-core,
.particle-shell,
.vacancy-halo,
.fragment-particle,
.surface-vacancy,
.vacancy-trace,
.satellite-particle,
.morph-mote {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.assembly-field {
  width: 460px;
  height: 460px;
  border-radius: 50%;
  opacity: var(--assembly-field-opacity);
  background:
    radial-gradient(circle, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0) 58%);
}

.convergence-ring {
  border-radius: 50%;
  opacity: var(--convergence-ring-opacity);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.convergence-ring-a {
  width: 304px;
  height: 304px;
}

.convergence-ring-b {
  width: 468px;
  height: 468px;
  border-color: rgba(21, 51, 85, 0.34);
}

.convergence-ring-c {
  width: 632px;
  height: 632px;
}

.particle-core {
  z-index: 4;
  width: 196px;
  height: 196px;
  border-radius: 50%;
  opacity: var(--core-formation);
  background:
    radial-gradient(circle at 34% 26%, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0) 24%),
    radial-gradient(circle at 65% 70%, color-mix(in srgb, var(--particle-core-c) 58%, transparent), transparent 34%),
    linear-gradient(150deg, var(--particle-core-a), var(--particle-core-b) 54%, var(--particle-core-c) 100%);
  box-shadow:
    0 0 0 52px color-mix(in srgb, var(--particle-glow) 24%, transparent),
    0 0 110px var(--particle-glow);
  scale: calc(0.18 + var(--core-formation) * 0.82);
}

.particle-shell {
  z-index: 2;
  border-radius: 50%;
  opacity: var(--shell-opacity);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.shell-one {
  width: 316px;
  height: 316px;
}

.shell-two {
  width: 474px;
  height: 474px;
  border-color: rgba(21, 51, 85, 0.34);
  transform: translate(-50%, -50%) rotate(18deg);
}

.shell-three {
  width: 648px;
  height: 648px;
  border-color: rgba(255, 255, 255, 0.06);
  transform: translate(-50%, -50%) rotate(-12deg);
}

.vacancy-halo {
  z-index: 3;
  width: 254px;
  height: 254px;
  border-radius: 50%;
  opacity: var(--vacancy-opacity);
  background: radial-gradient(circle, rgba(59, 95, 143, 0.12), rgba(59, 95, 143, 0) 68%);
}

.vacancy-trace {
  z-index: 3;
  height: 2px;
  opacity: var(--vacancy-trace-opacity);
  background: linear-gradient(90deg, rgba(255,255,255,0), rgba(59,95,143,0.9), rgba(255,255,255,0));
  box-shadow: 0 0 18px rgba(59, 95, 143, 0.32);
}

.vacancy-trace-a {
  width: 136px;
  transform: translate(calc(-50% - 18px), calc(-50% - 86px)) rotate(-16deg);
}

.vacancy-trace-b {
  width: 118px;
  transform: translate(calc(-50% + 72px), calc(-50% + 2px)) rotate(20deg);
}

.vacancy-trace-c {
  width: 132px;
  transform: translate(calc(-50% - 78px), calc(-50% + 80px)) rotate(14deg);
}

.fragment-particle {
  z-index: 5;
  opacity: var(--fragment-opacity);
  filter: brightness(var(--fragment-brightness));
  background: linear-gradient(145deg, var(--particle-core-a), var(--particle-core-b));
  box-shadow:
    0 0 14px rgba(255, 255, 255, 0.08),
    0 8px 16px rgba(0, 0, 0, 0.22);
}

.fragment-particle.square {
  width: 14px;
  height: 14px;
  border-radius: 3px;
}

.fragment-particle.diamond {
  width: 13px;
  height: 13px;
  border-radius: 2px;
  transform: translate(-50%, -50%) rotate(45deg);
}

.fragment-particle.rod {
  width: 18px;
  height: 8px;
  border-radius: 999px;
}

.fragment-particle.triangle {
  width: 0;
  height: 0;
  background: none;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 14px solid var(--particle-core-b);
  box-shadow: none;
}

.surface-vacancy {
  z-index: 5;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  opacity: var(--vacancy-opacity);
  scale: var(--vacancy-scale);
  background: linear-gradient(145deg, #ffffff, var(--logo-bright));
  box-shadow:
    0 0 22px rgba(59, 95, 143, 0.28),
    0 6px 18px rgba(0, 0, 0, 0.34);
}

.vacancy-1 { transform: translate(calc(-50% - 58px), calc(-50% - 32px)); }
.vacancy-2 { transform: translate(calc(-50% - 6px), calc(-50% - 78px)); }
.vacancy-3 { transform: translate(calc(-50% + 62px), calc(-50% - 36px)); }
.vacancy-4 { transform: translate(calc(-50% + 70px), calc(-50% + 20px)); }
.vacancy-5 { transform: translate(calc(-50% + 12px), calc(-50% + 74px)); }
.vacancy-6 { transform: translate(calc(-50% - 54px), calc(-50% + 48px)); }

.satellite-particle {
  z-index: 1;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  opacity: var(--satellite-opacity);
  scale: var(--satellite-scale);
  background: linear-gradient(145deg, var(--particle-core-a), var(--particle-core-b));
  box-shadow:
    0 0 12px rgba(255, 255, 255, 0.08),
    0 6px 14px rgba(0, 0, 0, 0.22);
}

.satellite-1 { transform: translate(calc(-50% - 410px), calc(-50% - 162px)); }
.satellite-2 { transform: translate(calc(-50% - 286px), calc(-50% - 346px)); }
.satellite-3 { transform: translate(calc(-50% + 14px), calc(-50% - 442px)); }
.satellite-4 { transform: translate(calc(-50% + 326px), calc(-50% - 288px)); }
.satellite-5 { transform: translate(calc(-50% + 446px), calc(-50% + 28px)); }
.satellite-6 { transform: translate(calc(-50% + 238px), calc(-50% + 378px)); }
.satellite-7 { transform: translate(calc(-50% - 98px), calc(-50% + 446px)); }
.satellite-8 { transform: translate(calc(-50% - 390px), calc(-50% + 230px)); }

.morph-mote {
  z-index: 6;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  opacity: 0;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.56), rgba(21, 51, 85, 0.84));
  box-shadow: 0 0 18px rgba(59, 95, 143, 0.24);
}

.application-atlas {
  position: absolute;
  inset: 0;
  z-index: 8;
  opacity: var(--atlas-opacity);
  transform: translateY(var(--atlas-shift)) scale(var(--atlas-scale));
  transform-origin: var(--atlas-origin);
  pointer-events: none;
}

.atlas-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.atlas-orbit,
.atlas-stream,
.atlas-stream-faint,
.ship-water,
.ship-hull,
.ship-deck,
.ship-stack,
.ship-deflect,
.stealth-wave,
.battery-shell,
.battery-flash,
.co2-flow,
.forest-ground,
.cc-link,
.tree {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.atlas-orbit {
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 1.2;
}

.orbit-b {
  stroke: rgba(21, 51, 85, 0.4);
}

.atlas-black-specular {
  fill: rgba(255, 255, 255, 0.56);
  filter: url(#atlasGlow);
}

.atlas-stream {
  stroke: url(#atlasFlow);
  stroke-width: 4;
  filter: url(#atlasGlow);
}

.atlas-stream-faint {
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 2;
}

.atlas-scene {
  opacity: 0;
}

.scene-frame {
  fill: rgba(8, 12, 18, 0.58);
  stroke: rgba(255, 255, 255, 0.1);
  stroke-width: 1.35;
  backdrop-filter: blur(10px);
}

.ship-water,
.ship-deflect,
.stealth-wave,
.battery-shell,
.co2-flow,
.forest-ground,
.stealth-detail {
  stroke: rgba(225, 233, 242, 0.84);
  stroke-width: 3;
}

.ship-drop,
.ship-hull,
.ship-deck,
.ship-stack,
.stealth-body,
.battery-bar,
.tree,
.co2-dot {
  fill: rgba(225, 233, 242, 0.92);
}

.ship-hull,
.ship-deck,
.ship-stack,
.stealth-body,
.tree {
  stroke: none;
}

.battery-cap {
  fill: rgba(225, 233, 242, 0.42);
}

.battery-shell {
  stroke-width: 3.4;
}

.battery-flash {
  stroke: rgba(225, 233, 242, 0.9);
  stroke-width: 2.6;
}

.panel {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.012));
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 10;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(2, 4, 7, 0.58);
  backdrop-filter: blur(20px);
}

.header-inner,
.content-shell {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  padding: 14px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark-frame {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  overflow: hidden;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(21, 51, 85, 0.22), rgba(21, 51, 85, 0.08));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-logo {
  width: 54px;
  height: auto;
  display: block;
  filter: brightness(1.05) contrast(1.06);
  transform: translateY(-13px) scale(1.42);
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-text strong {
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.brand-text small {
  color: rgba(255, 255, 255, 0.54);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.95rem;
  justify-content: flex-end;
}

.site-nav a {
  position: relative;
  padding-bottom: 4px;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--logo-bright);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.24s ease;
}

.site-nav a:hover::after {
  transform: scaleX(1);
}

.panel-kicker,
.eyebrow,
.application-card span {
  margin: 0 0 14px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

main {
  position: relative;
  z-index: 1;
}

.screen {
  min-height: 100svh;
  display: grid;
  align-items: center;
  padding: 122px 0 64px;
}

.hero-layout,
.section-grid,
.technology-layout,
.applications-layout,
.contact-layout {
  display: grid;
  gap: 28px;
}

.hero-layout {
  grid-template-columns: minmax(0, 1.16fr) minmax(320px, 430px);
}

.section-grid,
.technology-layout,
.contact-layout {
  grid-template-columns: minmax(280px, 430px) 1fr;
  align-content: start;
  padding-top: 30px;
}

.applications-layout {
  grid-template-columns: minmax(280px, 360px) 1fr;
}

.hero-copy h1,
.section-intro h2,
.panel h2,
.panel h3 {
  margin: 0;
}

.hero-copy h1 {
  max-width: 760px;
  font-size: clamp(3.5rem, 7vw, 6.8rem);
  line-height: 0.92;
  letter-spacing: -0.065em;
}

.hero-text,
.section-intro p,
.panel p,
.fact-row span {
  color: var(--muted);
  line-height: 1.76;
}

.hero-text {
  max-width: 660px;
  margin: 22px 0 0;
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--logo), var(--logo-bright));
  color: var(--text);
  box-shadow: 0 18px 36px rgba(21, 51, 85, 0.32);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.12);
  color: var(--text);
}

.hero-side,
.info-card,
.feature-card,
.application-card,
.facts-panel {
  border-radius: 30px;
  padding: 28px;
}

.hero-side h2 {
  margin-bottom: 12px;
  font-size: 2.8rem;
}

.hero-metrics {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.hero-metrics div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-metrics span {
  color: rgba(255, 255, 255, 0.44);
}

.section-intro {
  max-width: 440px;
}

.section-intro h2 {
  font-size: clamp(2.2rem, 4vw, 3.7rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
  margin-bottom: 14px;
}

.card-stack,
.technology-panels {
  display: grid;
  gap: 18px;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.application-card {
  min-height: 260px;
}

.contact-layout .facts-panel {
  position: relative;
  z-index: 2;
  margin-top: -8px;
  max-width: min(100%, 760px);
}

.section-intro-facts {
  max-width: 520px;
  margin-bottom: -8px;
}

.fact-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.fact-row strong {
  text-align: right;
}

@media (max-width: 1180px) {
  .hero-layout,
  .section-grid,
  .technology-layout,
  .applications-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .section-intro-facts {
    max-width: 680px;
    margin-bottom: 8px;
  }

  .contact-layout .facts-panel {
    max-width: 100%;
  }
}

@media (max-width: 980px) {
  .screen {
    padding: 108px 0 48px;
  }

  .hero-copy h1 {
    max-width: 640px;
    font-size: clamp(3.1rem, 10vw, 5.3rem);
  }

  .application-atlas {
    --atlas-scale: 1.08;
  }

  .particle-cluster {
    width: min(98vw, 860px);
    top: 55%;
  }

  .contact-layout {
    padding-top: 12px;
  }
}

@media (max-width: 760px) {
  .header-inner,
  .content-shell {
    width: min(var(--container), calc(100% - 24px));
  }

  .header-inner {
    gap: 12px;
    padding: 12px 0;
  }

  .site-nav {
    width: 100%;
    gap: 16px;
    justify-content: flex-start;
    font-size: 0.88rem;
  }

  .brand {
    width: 100%;
  }

  .brand-text {
    gap: 1px;
  }

  .brand-text strong {
    font-size: 0.9rem;
  }

  .brand-text small {
    font-size: 0.65rem;
  }

  .brand-mark-frame {
    width: 48px;
    height: 48px;
  }

  .brand-logo {
    width: 48px;
    transform: translateY(-11px) scale(1.42);
  }

  .particle-cluster {
    width: min(136vw, 860px);
    top: 58%;
  }

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

  .application-atlas {
    --atlas-scale: 1.46;
    --atlas-origin: 8% 100%;
    inset: 12% -46% -12% -18%;
  }

  .section-intro {
    max-width: 100%;
  }

  .section-intro h2 {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .hero-copy h1 {
    font-size: clamp(2.8rem, 15vw, 4.5rem);
  }

  .hero-text,
  .section-intro p,
  .panel p {
    line-height: 1.68;
  }

  .hero-side,
  .info-card,
  .feature-card,
  .application-card,
  .facts-panel {
    padding: 22px;
    border-radius: 24px;
  }

  .hero-metrics div,
  .fact-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .fact-row strong {
    text-align: left;
  }

  .section-intro-facts {
    margin-bottom: 10px;
  }

  .contact-layout {
    gap: 18px;
  }

  .contact-layout .facts-panel {
    margin-top: 0;
  }
}

@media (max-width: 540px) {
  .screen {
    padding: 104px 0 42px;
  }

  .particle-cluster {
    width: min(154vw, 920px);
    top: 60%;
  }

  .application-atlas {
    --atlas-scale: 1.76;
    --atlas-origin: 2% 100%;
    inset: 18% -74% -20% -30%;
  }

  .site-nav {
    gap: 12px 18px;
  }

  .button {
    width: 100%;
  }

  .hero-actions {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button,
  .site-nav a::after {
    transition: none;
  }
}