:root {
  --bg: #010105;
  --surface: #06070c;
  --surface-2: #0a0c13;
  --text: #f7f7f8;
  --muted: rgba(247,247,248,.64);
  --line: rgba(255,255,255,.13);
  --red: #ff1a1a;
  --blue: #186be8;
  --content: 1140px;
  --header: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; color: var(--text); background: var(--bg); font-family: Inter, "Noto Sans KR", sans-serif; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
img { display: block; max-width: 100%; }
::selection { background: var(--red); color: #fff; }

.noise { position: fixed; inset: 0; z-index: 20; pointer-events: none; opacity: .035; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.9'/%3E%3C/svg%3E"); }

.site-header { position: fixed; top: 0; left: 50%; transform: translateX(-50%); z-index: 30; width: min(calc(100% - 48px), 1300px); height: var(--header); display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid transparent; transition: background .35s, border .35s, width .35s; }
.site-header.is-scrolled { width: 100%; padding: 0 max(24px, calc((100vw - 1300px)/2)); background: rgba(1,1,5,.72); border-color: var(--line); backdrop-filter: blur(18px); }
.brand img, .site-footer img { width: 116px; height: 22px; object-fit: contain; }
.desktop-nav { display: flex; align-items: center; gap: 34px; font-size: 13px; color: rgba(255,255,255,.72); }
.desktop-nav a { transition: color .25s; }
.desktop-nav a:hover { color: #fff; }
.nav-cta { border: 1px solid rgba(255,255,255,.25); padding: 10px 16px; border-radius: 8px; }
.nav-cta span { color: var(--red); margin-left: 8px; }
.menu-button { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 9px; background: rgba(0,0,0,.4); padding: 12px; cursor: pointer; }
.menu-button span { display: block; height: 1px; background: #fff; margin: 5px 0; transition: transform .25s; }
.mobile-menu { display: none; }

.section-shell { width: min(calc(100% - 48px), var(--content)); margin-inline: auto; }
main section[id] { scroll-margin-top: var(--header); }
.eyebrow { margin: 0 0 18px; font-size: 12px; font-weight: 600; letter-spacing: .16em; color: rgba(255,255,255,.7); text-transform: uppercase; }
.eyebrow::before { content: ""; display: inline-block; width: 26px; height: 1px; margin: 0 10px 3px 0; background: linear-gradient(90deg, var(--red), var(--blue)); }
.section-heading h2 { margin: 0; font-size: clamp(2.25rem, 4.2vw, 3.4rem); line-height: 1.13; letter-spacing: -.045em; font-weight: 500; }
.section-heading > p:last-child { margin: 24px 0 0; color: var(--muted); line-height: 1.75; font-size: 16px; }
.section-heading--center { text-align: center; }
.section-heading--center .eyebrow::before { display: none; }

.hero { min-height: 100svh; position: relative; display: grid; place-items: center; isolation: isolate; overflow: hidden; }
.hero-video { position: absolute; inset: 0; z-index: -4; width: 100%; height: 100%; object-fit: cover; opacity: var(--hero-video-opacity, .54); transform: scale(var(--hero-video-scale, 1.04)); filter: saturate(1.12) contrast(1.08); transition: opacity .18s linear; }
#twin-core { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; opacity: .62; mix-blend-mode: screen; }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(circle at 50% 50%, transparent 0 16%, rgba(1,1,5,.2) 43%, var(--bg) 82%), linear-gradient(180deg, rgba(1,1,5,.18), transparent 30%, rgba(1,1,5,.42)); }
.hero-glow { position: absolute; width: 44vw; height: 44vw; filter: blur(100px); border-radius: 50%; opacity: .18; z-index: -3; }
.hero-glow--red { left: -24vw; bottom: -9vw; background: var(--red); }
.hero-glow--blue { right: -22vw; top: -13vw; background: var(--blue); }
.hero-copy { text-align: center; width: min(900px, calc(100% - 36px)); transform: translateY(-1vh); }
.hero-copy h1 { margin: 0; font-weight: 500; font-size: clamp(2.7rem, 5.5vw, 4.75rem); line-height: 1.05; letter-spacing: -.055em; text-wrap: balance; }
.hero-description { color: rgba(255,255,255,.72); line-height: 1.7; margin: 28px 0 0; }
.hero-actions { display: flex; justify-content: center; gap: 10px; margin-top: 34px; }
.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 11px 20px; border-radius: 9px; border: 1px solid; color: #fff; font-size: 14px; cursor: pointer; transition: transform .25s, background .25s, border .25s; }
.button:hover { transform: translateY(-2px); }
.button--primary { position: relative; background: rgba(0,0,0,.54); border-color: var(--red); box-shadow: 0 0 28px rgba(255,26,26,.18), inset 0 0 18px rgba(255,26,26,.06); }
.button--primary::before { content: ""; position: absolute; width: 70px; height: 14px; top: -8px; border-radius: 50%; background: var(--red); filter: blur(11px); opacity: .45; }
.button--ghost { border-color: rgba(255,255,255,.32); background: rgba(1,1,5,.35); }
.scroll-cue { position: absolute; left: 32px; bottom: 30px; display: flex; align-items: center; gap: 12px; font-size: 9px; letter-spacing: .18em; color: rgba(255,255,255,.45); writing-mode: vertical-rl; }
.scroll-cue i { height: 50px; width: 1px; background: linear-gradient(#fff, transparent); animation: scrollCue 1.8s infinite; transform-origin: top; }
.reveal { opacity: 0; transform: translateY(18px); animation: enter .9s forwards; }
.hero h1.reveal { animation-delay: .12s; }
.hero-description.reveal { animation-delay: .24s; }
.hero-actions.reveal { animation-delay: .36s; }

.twin-story { position: relative; min-height: 400vh; background: linear-gradient(180deg, #010105 0%, #02030a 45%, #010105 100%); }
.story-sticky { position: sticky; top: 0; height: 100svh; width: min(calc(100% - 48px), var(--content)); margin: 0 auto; display: grid; grid-template-columns: .85fr 1fr .95fr; align-items: center; gap: 50px; }
.story-heading h2 { font-size: clamp(2.4rem, 4.2vw, 4rem); }
.story-core { position: relative; width: min(32vw, 360px); aspect-ratio: 1; place-self: center; transform: scale(var(--story-scale, .72)); transition: filter .4s; }
.core-ring { position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(255,255,255,.1); }
.core-ring--outer { background: conic-gradient(from 90deg, transparent, rgba(255,26,26,.8), transparent 36%, rgba(24,107,232,.9), transparent 75%); mask: radial-gradient(transparent 62%, #000 64%); animation: spin 13s linear infinite; box-shadow: 0 0 80px rgba(255,26,26,.15); }
.core-ring--inner { inset: 18%; border-color: rgba(255,255,255,.22); animation: spinReverse 9s linear infinite; }
.core-node { position: absolute; inset: 32%; border-radius: 50%; background: radial-gradient(circle at 36% 32%, #fff 0 2%, #286fd9 9%, #060b1d 32%, #020204 60%, #cf150a 85%, #010105); box-shadow: 0 0 35px rgba(24,107,232,.4), 0 0 70px rgba(255,26,26,.24); }
.core-signal { position: absolute; width: 4px; height: 4px; border-radius: 50%; background: white; box-shadow: 0 0 12px 3px var(--blue); animation: orbit 6s linear infinite; }
.core-signal--a { left: 10%; top: 48%; transform-origin: 145px 10px; }
.core-signal--b { right: 15%; top: 29%; box-shadow: 0 0 12px 3px var(--red); animation-delay: -2.7s; }
.story-steps { display: grid; gap: 26px; }
.story-step { padding: 4px 0 4px 24px; border-left: 1px solid var(--line); opacity: .3; transform: translateX(12px); transition: opacity .45s, transform .45s, border .45s; }
.story-step.is-active { opacity: 1; transform: none; border-left-color: var(--red); }
.story-step span, .solution-index, .engine-card > span { color: var(--red); font-size: 11px; letter-spacing: .16em; }
.story-step h3 { margin: 10px 0 8px; font-size: 21px; font-weight: 500; }
.story-step p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.story-progress { position: absolute; bottom: 38px; left: 0; right: 0; height: 1px; background: var(--line); }
.story-progress i { display: block; width: var(--story-progress, 0%); height: 100%; background: linear-gradient(90deg, var(--red), var(--blue)); }

.solutions { padding-block: 180px; }
.solution-list { display: grid; gap: 54px; margin-top: 100px; }
.solution-card { min-height: 420px; display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; padding: 16px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: linear-gradient(120deg, rgba(255,255,255,.025), transparent); }
.solution-card--reverse .solution-copy { order: 2; }
.solution-copy { align-self: center; padding: 50px 54px; }
.solution-copy h3 { margin: 14px 0 18px; font-size: clamp(2rem, 3.4vw, 2.75rem); letter-spacing: -.04em; font-weight: 500; }
.solution-copy > p { color: var(--muted); line-height: 1.65; font-size: 15px; }
.solution-copy ul { list-style: none; padding: 0; margin: 30px 0 0; display: grid; gap: 12px; color: rgba(255,255,255,.8); font-size: 14px; }
.solution-copy li::before { content: ""; display: inline-block; width: 6px; height: 6px; border: 1px solid var(--blue); border-radius: 2px; margin-right: 12px; box-shadow: 0 0 8px rgba(24,107,232,.5); }
.solution-visual { margin: 0; border: 1px solid rgba(255,255,255,.08); border-radius: 9px; overflow: hidden; min-height: 390px; position: relative; background: #020409; }
.solution-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, transparent 60%, rgba(255,26,26,.08)); pointer-events: none; }
.solution-visual img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s cubic-bezier(.2,.7,.2,1), filter .6s; }
.solution-card:hover .solution-visual img { transform: scale(1.055); filter: saturate(1.15); }

.engines { min-height: 900px; position: relative; overflow: hidden; padding: 170px 0; background: #02030a; }
.engine-wave { position: absolute; width: 72vw; max-width: none; pointer-events: none; opacity: .65; }
.engine-wave--red { left: -33vw; bottom: -13%; transform: rotate(12deg); }
.engine-wave--blue { right: -30vw; top: -8%; transform: rotate(-13deg); }
.engine-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 70px; border: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.08); position: relative; z-index: 1; }
.engine-card { min-height: 250px; padding: 38px; background: rgba(4,7,16,.8); backdrop-filter: blur(20px); }
.engine-card h3 { font-size: 24px; font-weight: 500; margin: 28px 0 14px; }
.engine-card p { max-width: 390px; color: var(--muted); line-height: 1.7; margin: 0; font-size: 14px; }

.process { padding-block: 180px; }
.process-intro { max-width: 650px; }
.process-intro h2 { font-size: clamp(2.6rem, 5vw, 4.6rem); font-weight: 500; letter-spacing: -.055em; line-height: 1.05; margin: 0; }
.process-intro > p:last-child { color: var(--muted); line-height: 1.7; max-width: 540px; }
.process-layout { margin-top: 100px; display: grid; grid-template-columns: 2px minmax(350px, .9fr) 1.2fr; gap: 46px; align-items: start; }
.process-rail { width: 2px; height: 100%; min-height: 620px; background: var(--line); position: relative; }
.process-rail i { position: absolute; top: 0; width: 100%; height: var(--process-progress, 0%); background: linear-gradient(var(--red), var(--blue)); box-shadow: 0 0 12px var(--red); }
.process-list { display: grid; gap: 32px; }
.process-step { display: grid; grid-template-columns: 42px 1fr; gap: 14px; padding: 18px 0; opacity: .3; transition: opacity .4s, transform .4s; }
.process-step.is-active { opacity: 1; transform: translateX(8px); }
.process-step > span { color: var(--red); font-size: 12px; padding-top: 6px; }
.process-step h3 { margin: 0 0 8px; font-size: 26px; font-weight: 500; }
.process-step p { margin: 0; color: var(--muted); line-height: 1.65; font-size: 14px; }
.process-stage { position: sticky; top: 18vh; aspect-ratio: 1.15; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: radial-gradient(circle at 50% 45%, rgba(24,107,232,.14), transparent 38%), #03050a; perspective: 800px; }
.stage-grid { position: absolute; inset: 42% -20% -25%; background-image: linear-gradient(rgba(24,107,232,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(24,107,232,.12) 1px, transparent 1px); background-size: 34px 34px; transform: rotateX(67deg); transform-origin: center top; }
.stage-cube { position: absolute; left: 50%; top: 46%; width: 135px; height: 135px; transform-style: preserve-3d; transform: translate(-50%,-50%) rotateX(-18deg) rotateY(36deg); animation: cube 12s linear infinite; }
.stage-cube span { position: absolute; inset: 0; border: 1px solid rgba(255,255,255,.34); background: linear-gradient(135deg, rgba(255,26,26,.14), rgba(24,107,232,.08)); box-shadow: inset 0 0 30px rgba(24,107,232,.15); }
.stage-cube span:nth-child(1) { transform: translateZ(68px); }
.stage-cube span:nth-child(2) { transform: rotateY(90deg) translateZ(68px); }
.stage-cube span:nth-child(3) { transform: rotateX(90deg) translateZ(68px); }
.stage-label { position: absolute; left: 26px; right: 26px; bottom: 24px; display: flex; justify-content: space-between; align-items: flex-end; }
.stage-label small { color: var(--muted); font-size: 9px; letter-spacing: .18em; }
.stage-label strong { font-size: 14px; font-weight: 500; color: var(--red); }

.about-vision { padding: 190px max(24px, calc((100vw - var(--content))/2)); border-top: 1px solid var(--line); overflow: hidden; }
.vision-line { display: flex; align-items: center; gap: .18em; white-space: nowrap; font-size: clamp(3.3rem, 8.4vw, 9.2rem); line-height: .95; letter-spacing: -.065em; }
.vision-line--reverse { justify-content: flex-end; margin-top: 24px; }
.vision-window { width: clamp(120px, 16vw, 260px); height: .62em; border-radius: .15em; overflow: hidden; transition: width .8s cubic-bezier(.2,.8,.2,1); }
.vision-line:hover .vision-window { width: clamp(180px, 28vw, 440px); }
.vision-window img { width: 100%; height: 100%; object-fit: cover; }
.about-vision > p { max-width: 680px; margin: 70px 0 0 auto; color: var(--muted); line-height: 1.7; }

.contact { position: relative; min-height: 820px; display: flex; align-items: center; overflow: hidden; border-top: 1px solid var(--line); }
.contact-glow { position: absolute; inset: 0; background: radial-gradient(circle at 8% 100%, rgba(24,107,232,.5), transparent 37%), radial-gradient(circle at 94% 98%, rgba(255,26,26,.5), transparent 38%); opacity: .6; }
.contact-grid { position: relative; display: grid; grid-template-columns: 1fr .8fr; gap: 90px; align-items: start; }
.contact-copy h2 { font-size: clamp(2.8rem, 5vw, 4.5rem); line-height: 1.06; letter-spacing: -.055em; margin: 0; font-weight: 500; }
.contact-copy > p:not(.eyebrow) { color: var(--muted); margin: 28px 0 50px; }
.contact-details { display: grid; gap: 12px; font-size: 14px; color: rgba(255,255,255,.75); }
.contact-details a { color: #fff; }
.contact-form { display: grid; gap: 24px; padding: 36px; border: 1px solid var(--line); border-radius: 12px; background: rgba(1,1,5,.55); backdrop-filter: blur(22px); }
.contact-form label { display: grid; gap: 10px; }
.contact-form label span { font-size: 12px; color: rgba(255,255,255,.6); }
.contact-form input, .contact-form textarea { width: 100%; border: 0; border-bottom: 1px solid rgba(255,255,255,.2); border-radius: 0; color: #fff; background: transparent; padding: 12px 0; outline: none; resize: vertical; }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--red); }
.contact-form .button { justify-self: start; }
.form-note { margin: 0; color: rgba(255,255,255,.48); font-size: 11px; }
.site-footer { min-height: 160px; width: min(calc(100% - 48px), var(--content)); margin: auto; display: grid; grid-template-columns: 1fr auto auto; gap: 40px; align-items: center; border-top: 1px solid var(--line); color: rgba(255,255,255,.42); font-size: 11px; }

.reveal-on-scroll { opacity: 0; transform: translateY(32px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal-on-scroll.is-visible { opacity: 1; transform: none; }

@keyframes enter { to { opacity: 1; transform: none; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spinReverse { to { transform: rotate(-360deg); } }
@keyframes orbit { to { transform: rotate(360deg) translateX(30px); } }
@keyframes scrollCue { 0%,100% { transform: scaleY(.2); opacity: .2; } 50% { transform: scaleY(1); opacity: 1; } }
@keyframes cube { to { transform: translate(-50%,-50%) rotateX(342deg) rotateY(396deg); } }

@media (max-width: 900px) {
  .desktop-nav { display: none; }
  .menu-button { display: block; }
  .mobile-menu { display: grid; position: fixed; inset: 0; z-index: 25; background: rgba(1,1,5,.94); backdrop-filter: blur(24px); place-items: center; opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; }
  .mobile-menu.is-open { opacity: 1; visibility: visible; }
  .mobile-menu nav { display: grid; gap: 20px; text-align: center; font-size: 32px; }
  .story-sticky { grid-template-columns: 1fr; align-content: center; gap: 34px; }
  .story-heading { text-align: center; }
  .story-heading > p:last-child br { display: none; }
  .story-core { width: min(62vw, 300px); }
  .story-steps { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .story-step { padding: 12px; border-left: 0; border-top: 1px solid var(--line); }
  .story-step h3 { font-size: 15px; }
  .story-step p { display: none; }
  .solution-card { grid-template-columns: 1fr; }
  .solution-card--reverse .solution-copy { order: 0; }
  .solution-copy { padding: 34px 28px; }
  .solution-visual { min-height: 320px; }
  .process-layout { grid-template-columns: 2px 1fr; }
  .process-stage { grid-column: 1 / -1; position: relative; top: auto; width: 100%; }
  .contact-grid { grid-template-columns: 1fr; gap: 60px; }
  .contact { min-height: auto; padding: 120px 0; align-items: flex-start; }
  .site-footer { grid-template-columns: 1fr; gap: 16px; padding: 46px 0; }
}

@media (max-width: 600px) {
  :root { --header: 64px; }
  .site-header { width: calc(100% - 32px); }
  .site-header.is-scrolled { padding-inline: 16px; }
  .brand img { width: 96px; height: auto; }
  .section-shell { width: calc(100% - 32px); }
  .hero-copy h1 { font-size: clamp(2.35rem, 11vw, 3.25rem); }
  .hero-description br { display: none; }
  .hero-actions { flex-direction: column; align-items: center; }
  .button { width: min(260px, 100%); }
  .scroll-cue { display: none; }
  .story-sticky { width: calc(100% - 32px); }
  .story-heading h2 { font-size: 2.25rem; }
  .story-heading > p:last-child { font-size: 13px; }
  .story-core { width: 58vw; }
  .story-steps { grid-template-columns: 1fr; }
  .story-step { padding: 8px 12px; }
  .story-step:not(.is-active) { display: none; }
  .story-step p { display: block; }
  .solutions, .process { padding-block: 120px; }
  .section-heading--center br { display: none; }
  .solution-list { margin-top: 64px; gap: 28px; }
  .solution-visual { min-height: 220px; }
  .engine-grid { grid-template-columns: 1fr; }
  .engines { padding: 120px 0; }
  .process-layout { gap: 20px; margin-top: 60px; }
  .process-step { grid-template-columns: 34px 1fr; }
  .process-stage { aspect-ratio: 1; }
  .about-vision { padding-block: 120px; }
  .vision-line { font-size: 3rem; flex-wrap: wrap; }
  .vision-line--reverse { justify-content: flex-start; }
  .vision-window { width: 100%; height: 110px; order: 3; }
  .contact { padding: 110px 0; }
  .contact-form { padding: 26px 20px; }
  .contact-form .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal, .reveal-on-scroll { opacity: 1; transform: none; }
  .hero-video { transform: scale(1.04); }
}