:root{
  --ink:#0d0e12; --ink-2:#15171d; --ink-3:#1e2129; --line:#2a2e38;
  --paper:#f3efe6; --paper-2:#e8e2d3; --paper-ink:#17181c; --muted:#8b90a0; --muted-p:#5d5f68;
  --accent:#ff5a36; --accent-2:#ff8a6b; --onion:#4fd6ff; --lime:#c8f169;
  --r:14px; --max:1160px;
  --sans:"Pretendard","Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono","Menlo","D2Coding",Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ink);color:#e9eaf0;font-family:var(--sans);font-size:17px;line-height:1.65;word-break:keep-all;overflow-wrap:anywhere}
a{color:inherit}
img,canvas,svg{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
:focus-visible{outline:2px solid var(--onion);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#000;padding:8px 14px;border-radius:8px;z-index:99}
.skip:focus{left:12px}

/* header */
.hdr{position:sticky;top:0;z-index:20;background:rgba(13,14,18,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:62px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;letter-spacing:-.01em;font-size:18px}
.brand svg{width:30px;height:30px;flex:none}
.brand small{font-family:var(--mono);font-weight:500;color:var(--muted);font-size:12px;margin-left:2px}
.nav{display:flex;gap:6px;align-items:center}
.nav a{text-decoration:none;color:#b9bdca;padding:8px 12px;border-radius:999px;font-size:15px}
.nav a:hover{color:#fff;background:var(--ink-3)}
.nav .pill{background:var(--accent);color:#1a0904;font-weight:700}
.nav .pill:hover{background:var(--accent-2);color:#1a0904}

/* hero */
.hero{position:relative;overflow:hidden;padding:72px 0 88px;background:
  radial-gradient(900px 480px at 82% 8%,rgba(255,90,54,.16),transparent 62%),
  radial-gradient(700px 420px at 4% 92%,rgba(79,214,255,.10),transparent 60%),var(--ink)}
.hero::before{content:"";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;opacity:.28;-webkit-mask-image:radial-gradient(ellipse 80% 70% at 60% 40%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse 80% 70% at 60% 40%,#000 20%,transparent 75%);pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);gap:52px;align-items:center}
.status{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px;letter-spacing:.02em;color:var(--lime);border:1px solid rgba(200,241,105,.35);padding:6px 12px;border-radius:999px;background:rgba(200,241,105,.06)}
.status i{width:7px;height:7px;border-radius:50%;background:var(--lime);box-shadow:0 0 0 0 rgba(200,241,105,.7);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 9px rgba(200,241,105,0)}100%{box-shadow:0 0 0 0 rgba(200,241,105,0)}}
h1{font-size:clamp(40px,5.6vw,72px);line-height:1.08;letter-spacing:-.035em;margin:22px 0 20px;font-weight:900;color:#fff}
h1 em{font-style:normal;color:var(--accent);position:relative;white-space:nowrap}
h1 em::after{content:"";position:absolute;left:-2%;right:-2%;bottom:.06em;height:.14em;background:var(--onion);opacity:.55;border-radius:2px;transform:skewX(-14deg)}
.lede{color:#b5b9c7;font-size:clamp(17px,1.5vw,20px);max-width:30em;margin:0 0 30px}
.cta{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:700;font-size:16px;padding:14px 22px;border-radius:12px;border:1px solid transparent;cursor:pointer;font-family:inherit;transition:transform .12s,background .15s}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);color:#1a0904;box-shadow:0 8px 28px -8px rgba(255,90,54,.7)}
.btn.primary:hover{background:var(--accent-2)}
.btn.ghost{border-color:var(--line);color:#e9eaf0;background:var(--ink-2)}
.btn.ghost:hover{border-color:#444a58}
.facts{display:flex;flex-wrap:wrap;gap:8px 22px;margin:34px 0 0;padding:0;list-style:none;color:var(--muted);font-size:14.5px}
.facts li::before{content:"";display:inline-block;width:6px;height:6px;margin:0 9px 2px 0;background:var(--accent);transform:rotate(45deg)}

/* stage */
.stage{position:relative;background:var(--ink-2);border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:0 40px 80px -30px rgba(0,0,0,.8),0 0 0 1px rgba(255,255,255,.02) inset}
.stage .bar{display:flex;align-items:center;justify-content:space-between;font-family:var(--mono);font-size:12px;color:var(--muted);padding:2px 4px 12px}
.stage .dots{display:flex;gap:6px}.stage .dots b{width:9px;height:9px;border-radius:50%;background:var(--ink-3);border:1px solid var(--line)}
.canvas-box{position:relative;border-radius:10px;overflow:hidden;background:#111319;aspect-ratio:8/5;cursor:ew-resize;touch-action:pan-y}
.canvas-box canvas{display:block;width:100%;height:100%}
.reg{position:absolute;width:16px;height:16px;border:0 solid rgba(255,255,255,.35);pointer-events:none}
.reg.a{left:10px;top:10px;border-left-width:1.5px;border-top-width:1.5px}.reg.b{right:10px;top:10px;border-right-width:1.5px;border-top-width:1.5px}
.reg.c{left:10px;bottom:10px;border-left-width:1.5px;border-bottom-width:1.5px}.reg.d{right:10px;bottom:10px;border-right-width:1.5px;border-bottom-width:1.5px}
.tc{position:absolute;left:18px;top:16px;font-family:var(--mono);font-size:12px;color:#fff;background:rgba(0,0,0,.55);padding:3px 8px;border-radius:6px;pointer-events:none}
.chint{position:absolute;right:18px;bottom:16px;font-size:12px;color:#fff;background:rgba(0,0,0,.55);padding:3px 9px;border-radius:6px;pointer-events:none;transition:opacity .4s}
.strip{position:relative;display:flex;gap:6px;margin:12px 0 0;padding:16px 8px;background:#0a0b0e;border-radius:8px;overflow-x:auto;scrollbar-width:none}
.strip::-webkit-scrollbar{display:none}
.strip::before,.strip::after{content:"";position:absolute;left:0;right:0;height:5px;background:repeating-linear-gradient(90deg,#2a2e38 0 8px,transparent 8px 16px);opacity:.9;pointer-events:none}
.strip::before{top:5px}.strip::after{bottom:5px}
.thumb{flex:none;width:66px;aspect-ratio:8/5;border-radius:3px;border:2px solid transparent;padding:0;background:#111319;cursor:pointer;overflow:hidden;opacity:.62;transition:opacity .15s,border-color .15s}
.thumb canvas{display:block;width:100%;height:100%}
.thumb:hover{opacity:.95}.thumb[aria-current="true"]{opacity:1;border-color:var(--accent)}
.ctrls{display:flex;align-items:center;flex-wrap:wrap;gap:10px 18px;margin-top:12px;font-size:14px;color:#b5b9c7}
.ctrls button.play{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:50%;border:0;background:var(--accent);color:#1a0904;cursor:pointer}
.ctrls button.play svg{width:18px;height:18px}
.ctrls label{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px}
.ctrls input[type=range]{accent-color:var(--accent);width:110px}
.ctrls input[type=checkbox]{accent-color:var(--onion);width:17px;height:17px}
.ctrls .fc{margin-left:auto;font-family:var(--mono);font-size:12.5px;color:var(--muted)}

/* sections */
section{position:relative}
.sec{padding:92px 0}
.sec.paper{background:var(--paper);color:var(--paper-ink)}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 14px}
h2{font-size:clamp(30px,3.8vw,46px);line-height:1.15;letter-spacing:-.03em;margin:0 0 16px;font-weight:850}
.sub{max-width:36em;color:var(--muted-p);font-size:18px;margin:0 0 46px}
.sec:not(.paper) .sub{color:#aeb2c0}
.ticker{background:var(--accent);color:#1a0904;overflow:hidden;white-space:nowrap;border-block:1px solid #000}
.ticker div{display:inline-block;padding:13px 0;font-family:var(--mono);font-weight:700;font-size:15px;letter-spacing:.06em;animation:tick 34s linear infinite}
.ticker span{margin:0 22px}.ticker span:nth-child(even){opacity:.55}
@keyframes tick{to{transform:translateX(-50%)}}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:#fff;border:1px solid #ddd6c4;border-radius:var(--r);padding:28px 26px;position:relative;box-shadow:0 1px 0 #fff inset,0 18px 30px -24px rgba(23,24,28,.35)}
.card .n{font-family:var(--mono);font-size:12.5px;color:var(--accent);font-weight:700}
.card h3{margin:10px 0 8px;font-size:21px;letter-spacing:-.02em}
.card p{margin:0;color:var(--muted-p);font-size:16px}
.card svg{width:44px;height:44px;margin-bottom:6px}

.tools{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.tm{border:1px solid var(--line);background:var(--ink-2);border-radius:12px;padding:16px 16px 14px;transition:border-color .15s,transform .15s}
.tm:hover{border-color:#4a505f;transform:translateY(-2px)}
.tm .t{display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.tm b{font-size:16.5px;letter-spacing:-.01em}.tm .c{font-family:var(--mono);font-size:12px;color:var(--muted)}
.tm p{margin:6px 0 0;color:#98a0b2;font-size:14px;line-height:1.55}
.tm.first{grid-column:span 2;background:linear-gradient(135deg,rgba(255,90,54,.14),rgba(255,90,54,.02));border-color:rgba(255,90,54,.5)}
.tm.first .tag{display:inline-block;margin-top:10px;font-family:var(--mono);font-size:11.5px;color:#1a0904;background:var(--accent);padding:2px 8px;border-radius:5px;font-weight:700}
.note{margin:26px 0 0;color:var(--muted);font-size:14px}

.road{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:r;position:relative}
.road li{position:relative;padding:34px 18px 0 0;counter-increment:r}
.road li::before{content:counter(r,decimal-leading-zero);position:absolute;top:0;left:0;font-family:var(--mono);font-weight:700;font-size:13px;color:#fff;background:var(--paper-ink);width:34px;height:24px;border-radius:6px;display:flex;align-items:center;justify-content:center;z-index:1}
.road li::after{content:"";position:absolute;left:34px;right:0;top:11px;border-top:2px dashed #b9b2a0}
.road li:last-child::after{display:none}
.road li:first-child::before{background:var(--accent);color:#1a0904}
.road b{display:block;font-size:17px;letter-spacing:-.01em;margin-bottom:4px}
.road span{color:var(--muted-p);font-size:14.5px;line-height:1.55;display:block}

.faq{max-width:780px}
.faq details{border-bottom:1px solid var(--line);padding:6px 0}
.faq summary{cursor:pointer;list-style:none;font-weight:700;font-size:18px;padding:14px 34px 14px 0;position:relative;letter-spacing:-.01em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:10px;font-size:26px;color:var(--accent);font-weight:400;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{margin:0 0 16px;color:#aeb2c0;font-size:16.5px}

.closing{padding:96px 0;text-align:center;background:radial-gradient(700px 320px at 50% 0,rgba(255,90,54,.18),transparent 70%),var(--ink-2);border-top:1px solid var(--line)}
.closing h2{margin-bottom:12px}.closing p{color:#aeb2c0;margin:0 auto 28px;max-width:30em}
.ftr{background:var(--ink);border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:14px}
.ftr .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px}
.ftr nav{display:flex;gap:18px;flex-wrap:wrap}.ftr a{text-decoration:none}.ftr a:hover{color:#fff}

/* doc pages */
.doc{max-width:760px;margin:0 auto;padding:64px 24px 96px}
.doc h1{font-size:clamp(32px,4vw,44px);margin:0 0 8px}
.doc .upd{font-family:var(--mono);color:var(--muted);font-size:13px;margin-bottom:34px}
.doc h2{font-size:22px;margin:38px 0 10px;letter-spacing:-.02em}
.doc p,.doc li{color:#c3c7d3;font-size:16.5px}
.doc a{color:var(--onion)}

@media (max-width:980px){
  .hero .wrap{grid-template-columns:minmax(0,1fr);gap:40px}
  .tools{grid-template-columns:repeat(2,1fr)}
  .cards{grid-template-columns:1fr}
  .road{grid-template-columns:1fr;gap:20px}
  .road li{padding:0 0 0 48px}.road li::after{display:none}
  .road li::before{top:2px}
}
@media (max-width:560px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .hero{padding:44px 0 60px}.sec{padding:64px 0}
  .tools{grid-template-columns:1fr}.tm.first{grid-column:auto}
  .ctrls .fc{margin-left:0;width:100%}
  .thumb{width:56px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* 열린 도구 카드 */
.open-tools{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.ot{display:flex;flex-direction:column;gap:6px;text-decoration:none;background:var(--ink-2);border:1px solid var(--line);border-radius:16px;padding:22px 20px;transition:transform .15s,border-color .15s,background .15s;position:relative}
.ot:hover{transform:translateY(-3px);border-color:var(--accent);background:#1a1d25}
.ot .no{font-family:var(--mono);font-size:12px;color:var(--accent);font-weight:700}
.ot b{font-size:20px;letter-spacing:-.02em;color:#fff}
.ot p{margin:0;color:#aeb2c0;font-size:15px;line-height:1.55}
.ot .go{margin-top:auto;padding-top:10px;font-weight:700;color:var(--accent-2);font-size:15px}
.chip{display:inline-block;font-family:var(--mono);font-size:11.5px;padding:2px 8px;border-radius:5px;font-weight:700;vertical-align:2px}
.chip.on{background:var(--lime);color:#14200a}.chip.part{background:#ffd37a;color:#2a1d00}.chip.plan{background:#2a2e38;color:#aeb2c0}
.tm .t b{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.tm.open{border-color:#3d4a2a}
@media (max-width:980px){.open-tools{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.open-tools{grid-template-columns:1fr}}