:root{
  --bg:#07090f; --bg2:#0d111b; --panel:rgba(255,255,255,.045); --panel-b:rgba(255,255,255,.09);
  --text:#e9edf6; --muted:#98a3b8; --line:rgba(255,255,255,.1);
  --a:#7c5cff; --b:#19d3c5; --c:#ff7ab6; --ok:#4ade80; --bad:#fb7185;
  --grad:linear-gradient(100deg,var(--a),var(--b));
  --r:18px; --shadow:0 20px 60px -20px rgba(0,0,0,.6);
  color-scheme:dark;
}
@media (prefers-color-scheme:light){
  :root{--bg:#f6f7fb;--bg2:#eceef6;--panel:rgba(255,255,255,.75);--panel-b:rgba(20,24,40,.1);--text:#12162a;--muted:#5a6479;--line:rgba(20,24,40,.12);--shadow:0 20px 50px -25px rgba(30,40,90,.35);color-scheme:light}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Pretendard","Noto Sans KR","Segoe UI",system-ui,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
code{font:.88em ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--panel);border:1px solid var(--panel-b);padding:.1em .45em;border-radius:6px}
b{font-weight:650}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* background */
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:radial-gradient(1200px 700px at 50% -10%,var(--bg2),var(--bg))}
.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;animation:float 22s ease-in-out infinite}
.o1{width:520px;height:520px;background:var(--a);top:-140px;left:-120px}
.o2{width:460px;height:460px;background:var(--b);top:22%;right:-160px;animation-delay:-8s;opacity:.35}
.o3{width:380px;height:380px;background:var(--c);bottom:-140px;left:30%;animation-delay:-14s;opacity:.22}
.grid{position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse at 50% 20%,#000 20%,transparent 70%);opacity:.5}
@keyframes float{50%{transform:translate(40px,30px) scale(1.08)}}

/* nav */
.nav{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:14px max(20px,calc((100vw - 1120px)/2));backdrop-filter:blur(14px) saturate(1.4);background:color-mix(in srgb,var(--bg) 60%,transparent);border-bottom:1px solid transparent;transition:border-color .3s}
.nav.scrolled{border-color:var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;font-size:18px;letter-spacing:-.01em}
.nav nav{display:flex;gap:6px;align-items:center}
.nav nav a{padding:7px 12px;border-radius:99px;color:var(--muted);font-size:14.5px;transition:.2s}
.nav nav a:hover,.nav nav a.on{color:var(--text);background:var(--panel)}
.nav nav a.cta-sm{background:var(--grad);color:#fff;font-weight:600;margin-left:6px}
@media (max-width:720px){.nav nav a:not(.cta-sm){display:none}}

/* hero */
main{max-width:1120px;margin:0 auto;padding:0 20px}
.hero{padding:88px 0 40px;text-align:center}
.badge{display:inline-flex;align-items:center;gap:8px;margin:0 0 26px;padding:7px 14px;border-radius:99px;background:var(--panel);border:1px solid var(--panel-b);color:var(--muted);font-size:13.5px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 rgba(74,222,128,.6);animation:ping 2s infinite}
@keyframes ping{70%{box-shadow:0 0 0 10px rgba(74,222,128,0)}100%{box-shadow:0 0 0 0 rgba(74,222,128,0)}}
h1{font-size:clamp(38px,7vw,76px);line-height:1.08;letter-spacing:-.035em;margin:0 0 22px;font-weight:800}
.lead{max-width:680px;margin:0 auto 34px;color:var(--muted);font-size:clamp(16px,2vw,19px)}
.lead b{color:var(--text)}
.actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.actions.center{margin-top:30px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:14px;font-weight:650;font-size:15.5px;border:1px solid var(--panel-b);cursor:pointer;color:var(--text);background:var(--panel);transition:transform .15s,box-shadow .2s,border-color .2s;font-family:inherit}
.btn:hover{transform:translateY(-2px);border-color:var(--a)}
.btn.primary{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 12px 30px -10px var(--a)}
.btn.primary:hover{box-shadow:0 16px 36px -8px var(--a)}
.btn.sm{padding:9px 16px;font-size:14px;border-radius:11px}

/* terminal */
.term{max-width:760px;margin:56px auto 0;text-align:left;border-radius:var(--r);background:#0b0f19;border:1px solid var(--panel-b);box-shadow:var(--shadow);overflow:hidden}
.term-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.08);color:#7f8aa3;font-size:12.5px}
.term-bar i{width:11px;height:11px;border-radius:50%;background:#ff5f57}.term-bar i:nth-child(2){background:#febc2e}.term-bar i:nth-child(3){background:#28c840}
.term-bar span{margin-left:10px;font-family:ui-monospace,Menlo,monospace}
.term pre{margin:0;padding:20px 22px;min-height:190px;font:13.5px/1.85 ui-monospace,SFMono-Regular,Menlo,monospace;color:#d6deef;white-space:pre-wrap}
.term .p{color:#19d3c5}.term .o{color:#8b96ad}.term .k{color:#4ade80}
.caret{display:inline-block;width:8px;height:1.1em;background:#19d3c5;vertical-align:-.15em;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* overview */
.overview{margin:70px 0 30px}
.arch .br{fill:none;stroke:var(--c);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.arch .lb2{fill:var(--text);font:700 15px -apple-system,"Apple SD Gothic Neo",sans-serif}
.arch .lb{fill:var(--muted);font:500 12.5px -apple-system,"Apple SD Gothic Neo",sans-serif}

/* sections */
.section{padding:96px 0 10px}
.head{text-align:center;max-width:720px;margin:0 auto 46px}
.eyebrow{margin:0 0 12px;color:var(--b);font-weight:700;font-size:13px;letter-spacing:.14em;text-transform:uppercase}
h2{font-size:clamp(28px,4.4vw,44px);line-height:1.18;letter-spacing:-.03em;margin:0 0 14px;font-weight:780}
.head p:last-child{color:var(--muted);margin:0}
h3{margin:0 0 8px;font-size:18.5px;letter-spacing:-.01em}

/* cards */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:1000px){.cards{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.cards{grid-template-columns:1fr}}
.card{position:relative;padding:24px 22px 26px;border-radius:var(--r);background:var(--panel);border:1px solid var(--panel-b);transition:transform .25s,border-color .25s,background .25s;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;background:radial-gradient(400px 140px at var(--mx,50%) -20%,rgba(124,92,255,.22),transparent 70%);opacity:0;transition:.3s}
.card:hover{transform:translateY(-4px);border-color:rgba(124,92,255,.5)}
.card:hover::before{opacity:1}
.card h3{font-size:16.5px}
.card p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.6}
.card p b{color:var(--text)}
.ic{display:grid;place-items:center;width:44px;height:44px;margin-bottom:16px;border-radius:13px;font-style:normal;font-size:22px;background:linear-gradient(135deg,rgba(124,92,255,.28),rgba(25,211,197,.2));border:1px solid var(--panel-b)}

/* stepper */
.stepper{border-radius:var(--r);background:var(--panel);border:1px solid var(--panel-b);overflow:hidden}
.steps{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}
.steps button{all:unset;cursor:pointer;padding:18px 16px;text-align:center;color:var(--muted);font-weight:650;border-bottom:2px solid transparent;transition:.2s;display:flex;gap:9px;justify-content:center;align-items:center}
.steps button b{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--panel-b);font-size:12.5px}
.steps button:hover{color:var(--text)}
.steps button[aria-selected=true]{color:var(--text);border-color:var(--b);background:linear-gradient(180deg,transparent,rgba(25,211,197,.07))}
.steps button[aria-selected=true] b{background:var(--grad);color:#fff}
.steps button:focus-visible{outline:2px solid var(--a);outline-offset:-4px}
.step-body{padding:30px 32px;min-height:170px;display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:center}
.step-body p{margin:0;color:var(--muted)}
.step-body h3{font-size:22px;margin-bottom:10px}
.mini{font:13px/1.8 ui-monospace,Menlo,monospace;background:#0b0f19;color:#cdd6ea;padding:16px 18px;border-radius:14px;border:1px solid var(--panel-b);white-space:pre-wrap}
.mini .g{color:#4ade80}.mini .m{color:#8b96ad}.mini .y{color:#febc2e}
@media (max-width:760px){.steps button{font-size:13px;padding:14px 4px;flex-direction:column;gap:4px}.step-body{grid-template-columns:1fr;padding:22px}}

/* release demo */
.demo{display:grid;grid-template-columns:1fr 1.3fr;gap:24px;margin-top:22px;padding:28px;border-radius:var(--r);background:var(--panel);border:1px solid var(--panel-b)}
.demo p{color:var(--muted);margin:0 0 18px;font-size:14.5px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.hint{margin:16px 0 0!important;font:13px ui-monospace,Menlo,monospace;color:var(--b)!important}
.tree{font:13.5px/1 ui-monospace,Menlo,monospace;background:#0b0f19;border-radius:14px;border:1px solid var(--panel-b);padding:16px;color:#cdd6ea;min-height:250px;display:flex;flex-direction:column;gap:8px}
.tree .t{color:#8b96ad;padding:2px 4px}
.rel{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;border:1px solid rgba(255,255,255,.07);background:rgba(255,255,255,.03);transition:.35s;animation:pop .4s}
.rel.cur{border-color:var(--b);background:rgba(25,211,197,.1);box-shadow:0 0 0 1px rgba(25,211,197,.3),0 8px 24px -12px var(--b)}
.rel .ptr{margin-left:auto;font-size:12px;color:#0b0f19;background:var(--grad);padding:3px 9px;border-radius:99px;font-weight:700;opacity:0;transform:translateX(-8px);transition:.35s}
.rel.cur .ptr{opacity:1;transform:none}
@keyframes pop{from{opacity:0;transform:translateY(-8px) scale(.98)}}
@media (max-width:820px){.demo{grid-template-columns:1fr}}

/* tabs */
.tabs{border-radius:var(--r);background:var(--panel);border:1px solid var(--panel-b);overflow:hidden}
.tab-list{display:flex;gap:6px;padding:10px;border-bottom:1px solid var(--line);overflow-x:auto}
.tab-list button{all:unset;cursor:pointer;padding:10px 18px;border-radius:12px;color:var(--muted);font-weight:650;white-space:nowrap;transition:.2s}
.tab-list button:hover{color:var(--text);background:var(--panel)}
.tab-list button[aria-selected=true]{background:var(--grad);color:#fff}
.tab-list button:focus-visible{outline:2px solid var(--a)}
.tab-panel{padding:32px}
.tab-panel[hidden]{display:none}
.two{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}
@media (max-width:820px){.two{grid-template-columns:1fr}.tab-panel{padding:22px}}
.two p{color:var(--muted)}
.two p b{color:var(--text)}
.ticks{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:8px}
.ticks li{padding-left:28px;position:relative;font-size:14.5px}
.ticks li::before{content:"✓";position:absolute;left:0;top:1px;width:19px;height:19px;border-radius:50%;background:var(--grad);color:#fff;font-size:11.5px;display:grid;place-items:center;font-weight:800}
.mock{background:#0b0f19;border:1px solid var(--panel-b);border-radius:16px;padding:18px;display:grid;gap:12px;font-size:14px}
.bubble{padding:10px 14px;border-radius:14px;max-width:88%;color:#dfe6f5}
.bubble.u{justify-self:end;background:var(--a)}
.bubble.a{background:rgba(255,255,255,.07)}
.diff{display:grid;font:12.5px/1.7 ui-monospace,Menlo,monospace;border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,.08)}
.diff span{padding:4px 12px;white-space:pre-wrap;color:#cdd6ea}
.diff .hd{background:rgba(255,255,255,.06);color:#8b96ad}
.diff .del{background:rgba(251,113,133,.14);color:#fda4af}
.diff .add{background:rgba(74,222,128,.13);color:#86efac}
.pill{padding:6px 13px;border-radius:99px;font-size:12.5px;border:1px solid rgba(255,255,255,.14);color:#cdd6ea}
.pill.ok{background:rgba(74,222,128,.15);border-color:rgba(74,222,128,.4);color:#86efac}
.pill.bad{color:#fda4af;border-color:rgba(251,113,133,.4)}
.code{position:relative;background:#0b0f19;border:1px solid var(--panel-b);border-radius:16px;overflow:hidden}
.code pre{margin:0;padding:22px 22px;font:13.5px/1.85 ui-monospace,SFMono-Regular,Menlo,monospace;color:#d6deef;overflow-x:auto}
.code .c{color:#6f7b95}
.copy{position:absolute;top:10px;right:10px;padding:5px 12px;font:600 12px inherit;font-family:inherit;color:#cdd6ea;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:8px;cursor:pointer;transition:.2s}
.copy:hover{background:rgba(255,255,255,.16)}
.copy.done{color:#4ade80;border-color:#4ade80}

/* architecture */
.arch{border-radius:var(--r);background:var(--panel);border:1px solid var(--panel-b);padding:26px 14px}
.arch svg{width:100%;height:auto;color:var(--muted)}
.arch .n rect{fill:var(--bg2);stroke:var(--line);stroke-width:1.5}
.arch .n text{fill:var(--text);font:600 16px -apple-system,"Apple SD Gothic Neo",sans-serif}
.arch .n .sub{fill:var(--muted);font-size:12.5px;font-weight:500}
.arch .n .big{font-size:22px;font-weight:800}
.arch .hub rect{stroke:url(#ag);stroke-width:2.5;fill:color-mix(in srgb,var(--a) 12%,var(--bg2))}
.arch .adm rect{stroke:var(--c);stroke-dasharray:5 4}
.arch .l path{fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-dasharray:6 6;animation:dash 1.4s linear infinite}
.arch .l .dash{stroke:var(--c);color:var(--c)}
@keyframes dash{to{stroke-dashoffset:-24}}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:16px}
.facts div{padding:18px;border-radius:14px;background:var(--panel);border:1px solid var(--panel-b);font-size:14px;display:grid;gap:4px}
.facts b{color:var(--b);font-size:13px;letter-spacing:.04em}
.facts span{color:var(--muted)}
@media (max-width:900px){.facts{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.facts{grid-template-columns:1fr}}

/* CTA */
.cta-box{position:relative;text-align:center;padding:64px 24px;border-radius:26px;background:linear-gradient(135deg,rgba(124,92,255,.22),rgba(25,211,197,.14));border:1px solid var(--panel-b);overflow:hidden}
.cta-box p{color:var(--muted);margin:0 0 26px}
.code.wide{max-width:560px;margin:0 auto;text-align:left}

/* footer */
.foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;max-width:1120px;margin:90px auto 0;padding:26px 20px 44px;border-top:1px solid var(--line);color:var(--muted);font-size:13.5px}
.dim{opacity:.7}

/* reveal on scroll */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js .reveal{opacity:1;transform:none}
}


/* ---- AI section (emphasised) ---- */
.nav nav a.ai-link{color:var(--text);background:linear-gradient(100deg,rgba(124,92,255,.25),rgba(25,211,197,.2));border:1px solid var(--panel-b)}
.ai-section{position:relative;margin-top:20px;padding:70px 34px 40px;border-radius:30px;border:1px solid rgba(124,92,255,.38);background:linear-gradient(180deg,rgba(124,92,255,.10),rgba(25,211,197,.05) 60%,transparent);box-shadow:0 0 80px -30px rgba(124,92,255,.55)}
@media (max-width:720px){.ai-section{padding:44px 14px 24px;border-radius:22px}}
.sub-h{font-size:22px;letter-spacing:-.02em;margin:0}
.aidemo{max-width:860px;margin:0 auto 34px;border-radius:var(--r);background:#0b0f19;border:1px solid var(--panel-b);box-shadow:var(--shadow);overflow:hidden}
.demo-tabs{display:flex;gap:6px;padding:10px;border-bottom:1px solid rgba(255,255,255,.08)}
.demo-tabs button{all:unset;cursor:pointer;padding:9px 16px;border-radius:11px;color:#8b96ad;font-weight:650;font-size:14px;transition:.2s}
.demo-tabs button:hover{color:#e6ebf7}.demo-tabs button[aria-selected=true]{background:var(--grad);color:#fff}
.demo-tabs button:focus-visible{outline:2px solid var(--a)}
.demo-body{padding:22px 24px 26px;min-height:300px;display:grid;gap:14px;align-content:start}
.chat-u{justify-self:end;max-width:88%;padding:11px 16px;border-radius:16px 16px 4px 16px;background:var(--a);color:#fff;font-size:15px}
.trace{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.trace li{display:flex;gap:12px;align-items:baseline;padding:9px 14px;border-radius:11px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);opacity:0;transform:translateY(6px);transition:.35s;color:#c4cde0;font-size:14px}
.trace li.on{opacity:1;transform:none}
.trace li code{background:rgba(25,211,197,.12);border-color:rgba(25,211,197,.35);color:#5eead4;white-space:nowrap}
.trace li::before{content:"✓";color:#4ade80;font-weight:800}
.chat-a{max-width:92%;padding:12px 16px;border-radius:16px 16px 16px 4px;background:rgba(74,222,128,.10);border:1px solid rgba(74,222,128,.35);color:#c9f7d8;font-size:14.5px;opacity:0;transform:translateY(6px);transition:.4s}
.chat-a.on{opacity:1;transform:none}
.hl-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:900px){.hl-cards{grid-template-columns:1fr}}

/* ---- routing modes ---- */
.modes{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:0 0 18px}
@media (max-width:820px){.modes{grid-template-columns:1fr}}
.mode{padding:22px 24px;border-radius:var(--r);background:var(--panel);border:1px solid rgba(74,222,128,.4)}
.mode.soon{border-style:dashed;border-color:var(--panel-b);opacity:.92}
.mode h3{margin:12px 0 8px}.mode p{margin:0;color:var(--muted);font-size:14.5px}
.mode .pill{display:inline-block}