/* ═══════════════ ARC METRICS — Design System ═══════════════ */
:root{
  --bg:#04060a;
  --bg-2:#070b13;
  --panel:#0a0f1a;
  --ink:#eef1f7;
  --muted:#98a1b3;
  --dim:#5c6577;
  --accent:#5b8cff;
  --accent-deep:#2f5fe0;
  --line:rgba(255,255,255,.08);
  --line-soft:rgba(255,255,255,.05);
  --serif:'Cormorant Garamond', serif;
  --sans:'Pretendard Variable', Pretendard, -apple-system, sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  line-height:1.7;
  letter-spacing:-.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:rgba(91,140,255,.35)}

/* ─── Typography primitives ─── */
.eyebrow{
  font-size:12px;font-weight:600;letter-spacing:.42em;text-transform:uppercase;
  color:var(--accent);margin-bottom:26px;
}
.eyebrow.center{text-align:center}
h1{font-size:clamp(38px,6vw,76px);font-weight:700;line-height:1.16;letter-spacing:-.03em}
h1 em,h2 em,.cta h2 em{font-family:var(--serif);font-style:italic;font-weight:400;letter-spacing:0}
h2{font-size:clamp(30px,4.2vw,54px);font-weight:700;line-height:1.2;letter-spacing:-.03em}
h3{font-weight:600;letter-spacing:-.01em}
.section-lead{margin-top:22px;font-size:17px;color:var(--muted);font-weight:300}
.section-lead em{color:var(--ink);font-style:normal;font-weight:500}
.pc-only{display:inline}
@media(max-width:720px){.pc-only{display:none}}

/* ─── Layout ─── */
.container{max-width:1180px;margin:0 auto;padding:0 32px}
.section{padding:150px 0}
@media(max-width:720px){.section{padding:96px 0}}

/* ─── Reveal animation ─── */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s cubic-bezier(.16,1,.3,1),transform .9s cubic-bezier(.16,1,.3,1)}
.reveal.d1{transition-delay:.12s}
.reveal.d2{transition-delay:.24s}
.reveal.d3{transition-delay:.36s}
.reveal.in{opacity:1;transform:none}

/* ─── Buttons ─── */
.btn{
  display:inline-block;padding:16px 38px;font-size:14px;font-weight:600;letter-spacing:.08em;
  border-radius:2px;transition:all .35s ease;
}
.btn-solid{background:var(--ink);color:#0a0d13}
.btn-solid:hover{background:var(--accent);color:#fff;transform:translateY(-2px)}
.btn-line{border:1px solid rgba(255,255,255,.3);color:var(--ink)}
.btn-line:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}

/* ═══════════════ NAV ═══════════════ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .4s ease,border-color .4s ease;
  border-bottom:1px solid transparent;
}
.nav.scrolled{background:rgba(4,6,10,.82);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-color:var(--line-soft)}
.nav-inner{max-width:1320px;margin:0 auto;padding:0 32px;height:76px;display:flex;align-items:center;justify-content:space-between}
.brand{font-size:16px;font-weight:800;letter-spacing:.22em}
.brand sup{font-size:8px;font-weight:400;letter-spacing:0}
.nav-links{display:flex;align-items:center;gap:38px}
.nav-links a{font-size:13.5px;font-weight:500;letter-spacing:.06em;color:var(--muted);transition:color .3s}
.nav-links a:hover{color:var(--ink)}
.nav-cta{
  border:1px solid rgba(255,255,255,.25);padding:9px 22px;border-radius:2px;color:var(--ink)!important;
}
.nav-cta:hover{border-color:var(--accent);color:var(--accent)!important}
.nav-right{display:flex;align-items:center;gap:22px}
.lang{display:flex;align-items:center;gap:2px;border:1px solid var(--line);border-radius:2px;padding:3px}
.lang button{
  background:none;border:0;cursor:pointer;color:var(--dim);
  font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.08em;
  padding:5px 9px;border-radius:1px;transition:color .3s,background .3s;
}
.lang button:hover{color:var(--ink)}
.lang button.on{background:rgba(255,255,255,.1);color:var(--ink)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:30px;height:22px;position:relative}
.nav-toggle span{position:absolute;left:0;width:100%;height:1.5px;background:var(--ink);transition:all .3s}
.nav-toggle span:first-child{top:5px}
.nav-toggle span:last-child{bottom:5px}
@media(max-width:860px){
  .nav-toggle{display:block}
  .nav-links{
    position:fixed;inset:76px 0 auto 0;flex-direction:column;gap:0;
    background:rgba(4,6,10,.97);backdrop-filter:blur(20px);
    padding:12px 0 28px;border-bottom:1px solid var(--line);
    transform:translateY(-12px);opacity:0;pointer-events:none;transition:all .35s ease;
  }
  .nav-links.open{transform:none;opacity:1;pointer-events:auto}
  .nav-links a{padding:14px 32px;width:100%;text-align:center;font-size:15px}
  .nav-cta{border:0;padding:14px 32px}
}

/* ═══════════════ HERO ═══════════════ */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:center}
.hero-bg{position:absolute;inset:0;overflow:hidden}
.hero-bg img{width:100%;height:100%;object-fit:cover;transform:scale(1.06);animation:heroZoom 14s ease-out forwards}
@keyframes heroZoom{to{transform:scale(1)}}
.hero-veil{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(4,6,10,.55) 0%,rgba(4,6,10,.28) 40%,rgba(4,6,10,.82) 88%,var(--bg) 100%),
    radial-gradient(ellipse at 20% 60%,rgba(4,6,10,.55),transparent 60%);
}
.hero-content{position:relative;max-width:1180px;margin:0 auto;padding:140px 32px 0;width:100%}
.hero h1{margin:0 0 30px}
.hero-sub{font-size:clamp(15px,1.6vw,18px);color:rgba(238,241,247,.82);font-weight:300;line-height:1.9;margin-bottom:48px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-foot{position:relative;margin-top:auto;padding:0 32px}
.hero-stats{
  max-width:1180px;margin:90px auto 0;padding:34px 0 44px;
  border-top:1px solid rgba(255,255,255,.14);
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.hs strong{font-size:clamp(26px,3vw,40px);font-weight:700;letter-spacing:-.02em;display:block;line-height:1.1}
.hs span{font-size:12.5px;color:rgba(238,241,247,.6);letter-spacing:.04em}
@media(max-width:820px){.hero-stats{grid-template-columns:repeat(2,1fr);gap:28px 16px}}

/* ═══════════════ MARKET ═══════════════ */
.market{position:relative;background:var(--bg)}
.market-bg{position:absolute;inset:0;opacity:.5}
.market-bg img{width:100%;height:100%;object-fit:cover}
.market-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,var(--bg) 0%,rgba(4,6,10,.72) 30%,rgba(4,6,10,.72) 70%,var(--bg) 100%)}
.market .container{position:relative}
.market-grid{margin-top:70px;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.m-stat{background:rgba(4,6,10,.78);backdrop-filter:blur(6px);padding:42px 32px 38px}
.m-stat strong{font-size:clamp(30px,3.4vw,46px);font-weight:700;letter-spacing:-.02em;display:block;background:linear-gradient(120deg,#fff 30%,var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.m-stat em{display:block;margin-top:12px;font-style:normal;font-size:13.5px;font-weight:600;letter-spacing:.05em;color:var(--ink)}
.m-stat span{display:block;margin-top:6px;font-size:12px;color:var(--dim);line-height:1.6}
.market-note{margin-top:44px;font-size:14px;color:var(--muted);font-weight:300;max-width:820px;line-height:2}
@media(max-width:960px){.market-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:540px){.market-grid{grid-template-columns:1fr}}

/* ═══════════════ PROBLEM ═══════════════ */
.problem{background:var(--bg-2)}
.problem h2 em{color:var(--accent)}
.problem-grid{margin-top:70px;display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.p-card{
  border:1px solid var(--line);border-radius:4px;padding:44px 36px;
  background:linear-gradient(160deg,rgba(255,255,255,.025),transparent 55%);
  transition:border-color .4s,transform .4s;
}
.p-card:hover{border-color:rgba(91,140,255,.4);transform:translateY(-6px)}
.p-tag{font-size:11px;font-weight:600;letter-spacing:.28em;text-transform:uppercase;color:var(--dim)}
.p-card strong{display:block;font-size:clamp(40px,4.4vw,58px);font-weight:700;letter-spacing:-.03em;margin:18px 0 10px;color:var(--ink)}
.p-card h3{font-size:18px;margin-bottom:12px}
.p-card p{font-size:14px;color:var(--muted);font-weight:300}
.problem-foot{margin-top:52px;font-size:14.5px;color:var(--dim);border-left:2px solid var(--accent);padding-left:20px}
@media(max-width:860px){.problem-grid{grid-template-columns:1fr}}

/* ═══════════════ SOLUTION ═══════════════ */
.sol-grid{margin-top:80px;display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.sol-card{position:relative}
.sol-img{overflow:hidden;border-radius:4px;aspect-ratio:4/3}
.sol-img img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s cubic-bezier(.16,1,.3,1)}
.sol-card:hover .sol-img img{transform:scale(1.06)}
.sol-num{
  display:block;margin:26px 0 8px;font-family:var(--serif);font-style:italic;
  font-size:15px;color:var(--accent);letter-spacing:.1em;
}
.sol-card h3{font-size:20px;margin-bottom:10px}
.sol-card p{font-size:14.5px;color:var(--muted);font-weight:300}
@media(max-width:860px){.sol-grid{grid-template-columns:1fr;gap:52px}}

/* ═══════════════ TECHNOLOGY ═══════════════ */
.tech{background:var(--bg-2);padding-top:0}
.tech-banner{position:relative;height:520px;overflow:hidden}
.tech-banner img{width:100%;height:100%;object-fit:cover}
.tech-banner::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,var(--bg-2) 0%,transparent 35%,rgba(7,11,19,.55) 75%,var(--bg-2) 100%)}
.tech-banner-text{position:absolute;left:0;right:0;bottom:60px;text-align:center;z-index:2}
.tech-banner-text .eyebrow{margin-bottom:18px}
.tech-banner-sub{margin-top:14px;color:var(--muted);font-weight:300;font-size:16px}
.layer-strip{
  margin-top:90px;display:grid;grid-template-columns:repeat(5,1fr);
  gap:1px;background:var(--line);border:1px solid var(--line);
}
.layer{background:var(--panel);padding:34px 26px 30px;transition:background .4s}
.layer:hover{background:#0d1424}
.layer span{font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:var(--accent);font-weight:600}
.layer h4{margin:12px 0 10px;font-size:15.5px;letter-spacing:.04em}
.layer p{font-size:12.5px;color:var(--dim);line-height:1.75;font-weight:300}
@media(max-width:1000px){.layer-strip{grid-template-columns:repeat(2,1fr)}.layer:last-child{grid-column:1/-1}}
@media(max-width:540px){.layer-strip{grid-template-columns:1fr}}
.tech-duo{margin-top:34px;display:grid;grid-template-columns:1fr 1fr;gap:30px}
.td-card{border:1px solid var(--line);border-radius:4px;overflow:hidden;background:var(--panel);transition:border-color .4s,transform .4s}
.td-card:hover{border-color:rgba(91,140,255,.4);transform:translateY(-6px)}
.td-img{aspect-ratio:16/9;overflow:hidden}
.td-img img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s cubic-bezier(.16,1,.3,1)}
.td-card:hover .td-img img{transform:scale(1.05)}
.td-body{padding:36px 36px 40px}
.td-body h3{font-size:21px;letter-spacing:.02em}
.td-body h3 span{font-family:var(--serif);font-style:italic;font-weight:400;color:var(--accent);font-size:19px}
.td-body p{margin-top:14px;font-size:14.5px;color:var(--muted);font-weight:300}
@media(max-width:860px){.tech-duo{grid-template-columns:1fr}}

/* ═══════════════ PROCESS ═══════════════ */
.process-head{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.process-img{border-radius:4px;overflow:hidden;aspect-ratio:16/10}
.process-img img{width:100%;height:100%;object-fit:cover}
@media(max-width:860px){.process-head{grid-template-columns:1fr;gap:40px}}
.steps{
  list-style:none;margin-top:80px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);
}
.steps li{background:var(--bg);padding:40px 34px 38px;transition:background .4s}
.steps li:hover{background:var(--bg-2)}
.steps li span{font-family:var(--serif);font-style:italic;font-size:17px;color:var(--accent)}
.steps li h4{margin:14px 0 8px;font-size:16.5px}
.steps li p{font-size:13px;color:var(--dim);font-weight:300}
@media(max-width:860px){.steps{grid-template-columns:1fr}}
.process-bar{
  margin-top:34px;border:1px solid rgba(91,140,255,.3);border-radius:4px;
  background:linear-gradient(100deg,rgba(91,140,255,.1),transparent 70%);
  padding:26px 36px;text-align:center;
}
.process-bar p{font-size:15px;color:var(--muted);font-weight:300}
.process-bar strong{color:var(--ink);font-weight:600}

/* ═══════════════ TRACTION ═══════════════ */
.traction{background:var(--bg-2)}
.case-grid{margin-top:70px;display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.case{border:1px solid var(--line);border-radius:4px;overflow:hidden;background:var(--panel);transition:border-color .4s,transform .4s}
.case:hover{border-color:rgba(91,140,255,.4);transform:translateY(-6px)}
.case-img{aspect-ratio:16/10;overflow:hidden}
.case-img img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s cubic-bezier(.16,1,.3,1)}
.case:hover .case-img img{transform:scale(1.05)}
.case-body{padding:32px 32px 36px}
.case-region{font-size:11px;font-weight:700;letter-spacing:.3em;color:var(--accent)}
.case-body h3{font-size:19px;margin:10px 0 6px}
.case-metric{font-size:14px;color:var(--muted);margin-bottom:14px}
.case-metric strong{font-size:22px;color:var(--ink);font-weight:700;letter-spacing:-.02em}
.case-body p:last-child{font-size:13.5px;color:var(--dim);font-weight:300}
.traction-foot{margin-top:52px;font-size:14.5px;color:var(--dim);border-left:2px solid var(--accent);padding-left:20px}
@media(max-width:860px){.case-grid{grid-template-columns:1fr}}

/* ═══════════════ PORTFOLIO ═══════════════ */
.works-grid{margin-top:70px;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.work{background:var(--bg);padding:46px 36px 50px;transition:background .4s;position:relative;overflow:hidden}
.work::after{
  content:'';position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent);transition:width .5s cubic-bezier(.16,1,.3,1);
}
.work:hover{background:var(--bg-2)}
.work:hover::after{width:100%}
.work span{font-size:11px;font-weight:600;letter-spacing:.3em;color:var(--dim)}
.work h3{margin-top:16px;font-size:19px;font-weight:600}
@media(max-width:860px){.works-grid{grid-template-columns:1fr}}

/* ═══════════════ GALLERY ═══════════════ */
.gallery{padding:130px 0 150px;background:var(--bg)}
.gallery .eyebrow{margin-bottom:54px}
.marquee{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;gap:22px;width:max-content;animation:scroll 46s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee-track img{height:320px;width:auto;border-radius:4px;object-fit:cover}
@keyframes scroll{to{transform:translateX(calc(-50% - 11px))}}
@media(max-width:720px){.marquee-track img{height:210px}.gallery{padding:90px 0 100px}}

/* ═══════════════ BUSINESS ═══════════════ */
.biz{position:relative;background:var(--bg-2)}
.biz-bg{position:absolute;inset:0;opacity:.24}
.biz-bg img{width:100%;height:100%;object-fit:cover}
.biz-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,var(--bg-2) 0%,rgba(7,11,19,.5) 40%,var(--bg-2) 100%)}
.biz .container{position:relative}
.biz-grid{margin-top:70px;display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.biz-card{
  border:1px solid var(--line);border-radius:4px;padding:44px 36px;
  background:rgba(4,6,10,.62);backdrop-filter:blur(8px);
  transition:border-color .4s,transform .4s;
}
.biz-card:hover{border-color:rgba(91,140,255,.4);transform:translateY(-6px)}
.biz-icon{font-size:26px;color:var(--accent);display:block;margin-bottom:22px}
.biz-card h3{font-size:18px}
.biz-card em{display:block;font-family:var(--serif);font-style:italic;color:var(--accent);font-size:15px;margin:6px 0 14px}
.biz-card p{font-size:14px;color:var(--muted);font-weight:300}
.target{margin-top:56px;border-top:1px solid var(--line);padding-top:36px;display:flex;gap:40px;align-items:baseline;flex-wrap:wrap}
.target span{font-size:11px;font-weight:600;letter-spacing:.3em;color:var(--accent);white-space:nowrap}
.target p{font-size:15px;color:var(--muted);font-weight:300}
@media(max-width:860px){.biz-grid{grid-template-columns:1fr}}

/* ═══════════════ TEAM ═══════════════ */
.team-grid{margin-top:80px;display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.member{border-top:1px solid var(--line);padding-top:34px;transition:border-color .4s}
.member:hover{border-color:var(--accent)}
.monogram{
  font-family:var(--serif);font-style:italic;font-size:44px;color:var(--accent);
  display:block;line-height:1;margin-bottom:24px;
}
.member h3{font-size:18px;letter-spacing:.02em}
.member em{display:block;font-style:normal;font-size:12.5px;color:var(--accent);letter-spacing:.06em;margin:8px 0 16px}
.member p{font-size:13px;color:var(--muted);font-weight:300;line-height:1.8}
@media(max-width:1000px){.team-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:540px){.team-grid{grid-template-columns:1fr}}

/* ═══════════════ CTA ═══════════════ */
.cta{position:relative;padding:190px 0;text-align:center;overflow:hidden}
.cta-bg{position:absolute;inset:0}
.cta-bg img{width:100%;height:100%;object-fit:cover}
.cta-veil{position:absolute;inset:0;background:linear-gradient(180deg,var(--bg) 0%,rgba(4,6,10,.68) 35%,rgba(4,6,10,.68) 70%,var(--bg) 100%)}
.cta-content{position:relative;max-width:860px;margin:0 auto;padding:0 32px}
.cta h2{font-size:clamp(36px,5.4vw,68px)}
.cta h2 em{color:var(--accent)}
.cta-content>p{margin-top:26px;color:rgba(238,241,247,.75);font-weight:300;line-height:2}
.cta-mails{margin-top:52px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
@media(max-width:720px){.cta{padding:130px 0}}

/* ═══════════════ FOOTER ═══════════════ */
.footer{border-top:1px solid var(--line-soft);padding:54px 0}
.footer-inner{
  max-width:1320px;margin:0 auto;padding:0 32px;
  display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
}
.footer-brand{font-size:14px;font-weight:800;letter-spacing:.22em}
.footer-brand sup{font-size:7px;font-weight:400}
.footer-tag{font-size:12px;color:var(--dim);margin-top:6px;letter-spacing:.04em}
.footer-copy{font-size:12px;color:var(--dim)}