/* whosup.dev — 최종안 (시안 C "전후 이야기" 다듬기)
   흑백 + 주황 하나. 위계는 괘선, 굵기, 잉크 농도, 여백으로만. */

:root{
  color-scheme: light dark;
  --paper:#ffffff;
  --ink:#111111;
  --text:#2b2b2b;
  --muted:#595959;
  --faint:#6e6e6e;
  --rule:rgba(17,17,17,.24);
  --rule-2:rgba(17,17,17,.12);
  --dash:rgba(17,17,17,.42);
  --tone:#f1f1f0;
  --accent:#F97703;
  --on-accent:#111111;
  --fail:#C4281C;
  --sans:"Avenir Next","Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic","Segoe UI",system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono","Pretendard Variable",Pretendard,monospace;
  --gap:clamp(80px,10vw,144px);
}
@media (prefers-color-scheme: dark){
  :root{
    --paper:#1e1e1e;
    --ink:#ffffff;
    --text:#dadada;
    --muted:#a8a8a8;
    --faint:#8e8e8e;
    --rule:rgba(255,255,255,.26);
    --rule-2:rgba(255,255,255,.13);
    --dash:rgba(255,255,255,.42);
    --tone:#2a2a2a;
    --fail:#FF6E61;
  }
}

/* 한국어 화면: 라틴 글자와 숫자만 Avenir Next로, 문장부호는 Pretendard로 맞춘다 */
@font-face{font-family:"WU Latin";font-weight:400;src:local("Avenir Next Regular"),local("AvenirNext-Regular");unicode-range:U+30-39,U+41-5A,U+61-7A}
@font-face{font-family:"WU Latin";font-weight:500;src:local("Avenir Next Medium"),local("AvenirNext-Medium");unicode-range:U+30-39,U+41-5A,U+61-7A}
@font-face{font-family:"WU Latin";font-weight:600;src:local("Avenir Next Demi Bold"),local("AvenirNext-DemiBold");unicode-range:U+30-39,U+41-5A,U+61-7A}
@font-face{font-family:"WU Latin";font-weight:700;src:local("Avenir Next Bold"),local("AvenirNext-Bold");unicode-range:U+30-39,U+41-5A,U+61-7A}
@font-face{font-family:"WU Latin";font-weight:800 900;src:local("Avenir Next Heavy"),local("AvenirNext-Heavy");unicode-range:U+30-39,U+41-5A,U+61-7A}
html[lang="ko"]{--sans:"WU Latin","Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic","Segoe UI",system-ui,sans-serif}
/* 한국어 제목은 라틴 글자도 Pretendard로 써서 한글과 굵기를 맞춘다 */
html[lang="ko"] h1,html[lang="ko"] .scene-head h3,html[lang="ko"] .scene-head h2,html[lang="ko"] .closing{font-weight:900;font-family:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic","Segoe UI",system-ui,sans-serif}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:24px}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:var(--sans);font-size:17px;line-height:1.68;
  word-break:keep-all;overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
html[lang="en"] body{line-height:1.56}
html[lang="ko"] [data-l="en"],html[lang="en"] [data-l="ko"]{display:none !important}

img,svg{max-width:100%}
p{margin:0}
a{color:var(--ink);text-decoration-thickness:1px;text-underline-offset:.22em}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
::selection{background:var(--ink);color:var(--paper)}
code,kbd{font-family:var(--mono);font-variant-ligatures:none}
html[lang="ko"] .term,html[lang="ko"] .win,html[lang="ko"] .spec .m,html[lang="ko"] .arw > span,html[lang="ko"] .node .m,html[lang="ko"] .back .lbl.m{word-spacing:-.28em}

[hidden]{display:none !important}
.vh{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:16px;top:-80px;z-index:10;background:var(--ink);color:var(--paper);padding:10px 14px;font-size:14px}
.skip:focus{top:12px}

.wrap{max-width:1440px;margin-inline:auto;padding-inline:clamp(20px,5.55vw,80px)}

/* ───── 화살표 (도식 공용) ───── */
.arw{position:relative;display:block;height:1px;min-width:24px;background:var(--ink);font-style:normal}
.arw::after{content:"";position:absolute;right:1px;top:50%;width:9px;height:9px;border-top:1px solid var(--ink);border-right:1px solid var(--ink);transform:translateY(-50%) rotate(45deg)}
.arw > span{position:absolute;left:50%;bottom:11px;transform:translateX(-50%);font:12px/1.4 var(--mono);color:var(--muted);text-align:center;white-space:nowrap}

/* ───── 헤더 ───── */
.top{border-bottom:1px solid var(--ink)}
.top-in{display:flex;align-items:center;gap:32px;height:68px}
.brand{display:inline-flex;align-items:center;flex:none}
.brand img{display:block;height:27px;width:auto}
.nav{display:flex;gap:28px;margin-left:auto;font-size:14.5px}
.nav a{text-decoration:none;color:var(--muted);padding:6px 0}
.nav a:hover{color:var(--ink);text-decoration:underline}
.top-end{display:flex;align-items:center;gap:22px;font-size:14.5px}
.lang{display:flex;border:1px solid var(--rule)}
.lang button{font:inherit;font-size:13px;line-height:1;padding:8px 11px;border:0;background:transparent;color:var(--muted);cursor:pointer}
.lang button[aria-pressed="true"]{background:var(--ink);color:var(--paper);font-weight:700}
.gh{font-weight:700;text-decoration:none;border:1px solid var(--ink);padding:6px 14px;line-height:1.3}
.gh:hover{background:var(--ink);color:var(--paper)}

/* ───── 히어로 ───── */
.hero{padding-top:clamp(22px,2.9vw,42px)}
.hero-head{display:grid;grid-template-columns:minmax(0,1fr);gap:clamp(16px,1.8vw,26px)}
.hero-side{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(24px,4vw,64px);align-items:start}
.premise{font-size:14.5px;font-weight:600;color:var(--muted);margin-bottom:clamp(10px,1.1vw,16px)}
.premise a{color:inherit}
h1{margin:0;color:var(--ink);font-weight:800;font-size:clamp(44px,8.33vw,120px);line-height:1.04;letter-spacing:-.04em}
html[lang="en"] h1{font-size:clamp(36px,6.4vw,92px);line-height:1;letter-spacing:-.035em}
.br-m{display:none}
.sub{font-size:clamp(17px,1.45vw,21px);line-height:1.5;font-weight:500;color:var(--ink);max-width:28em}
.fine{font-size:14px;line-height:1.6;color:var(--muted);margin-top:11px}
.fine a{color:var(--text)}
.fine .hero-gh{font-weight:700;color:var(--ink);white-space:nowrap}
.nb{white-space:nowrap}
@media (min-width:1280px){
  html[lang="ko"] .hero-head{grid-template-columns:max-content minmax(0,1fr);gap:48px;align-items:end}
  html[lang="ko"] .hero-side{display:block;padding-bottom:6px}
  html[lang="ko"] .hero-say{margin-bottom:20px}
}

.cmd{display:flex;align-items:stretch;border:1px solid var(--ink);max-width:100%}
.cmd code{flex:1;min-width:0;display:block;padding:13px 14px;font-size:13.5px;line-height:1.5;color:var(--ink);white-space:normal;overflow-wrap:anywhere}
.cmd .ps{color:var(--faint);user-select:none}
.copy{flex:none;font:inherit;font-size:14px;font-weight:700;line-height:1;min-width:84px;padding:0 16px;border:0;border-left:1px solid var(--ink);background:var(--ink);color:var(--paper);cursor:pointer}
.copy:hover{background:var(--paper);color:var(--ink)}
.copy .c1{display:none}
.copy.is-copied .c0{display:none}
.copy.is-copied .c1{display:inline}
.copy:focus-visible{outline-offset:2px}
/* 한국어 2단 히어로가 좁은 구간: 설치 명령이 한 줄에 들어가게 사이를 조인다 */
@media (min-width:1280px) and (max-width:1439px){
  html[lang="ko"] .hero-head{gap:24px}
  html[lang="ko"] .hero .cmd code{padding-inline:12px;font-size:13px}
  html[lang="ko"] .hero .copy{min-width:76px}
}

/* 전 / 후 */
.ba{margin:clamp(22px,2.6vw,38px) 0 0;display:grid;grid-template-columns:minmax(0,3.5fr) 84px minmax(0,8.5fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}
.ba > figcaption{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.ba-half{display:flex;flex-direction:column;min-width:0;padding:12px 0 22px}
.ba-top{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:28px;margin-bottom:10px}
.ba-label{font-size:14.5px;font-weight:700;line-height:28px;color:var(--ink)}
.ba-label small{margin-left:8px;font-size:13px;font-weight:400;color:var(--muted)}
.ba-before .ba-label{color:var(--muted);margin-bottom:10px}
.ba-note{margin-top:12px;font-size:13.5px;line-height:1.5;color:var(--muted)}
.hb-toggle{flex:none;font:inherit;font-size:12.5px;line-height:1;padding:6px 10px;border:1px solid var(--rule);background:transparent;color:var(--muted);cursor:pointer}
.hb-toggle:hover{border-color:var(--ink);color:var(--ink)}
.hb-toggle .p1,.hb-toggle[aria-pressed="true"] .p0{display:none}
.hb-toggle[aria-pressed="true"] .p1{display:inline}
.ba-mid{position:relative;display:grid;place-items:center}
.ba-mid::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:var(--rule)}
.go{position:relative;display:block;width:46px;height:46px;background:var(--ink)}
.go::before{content:"";position:absolute;left:12px;right:13px;top:50%;height:2px;margin-top:-1px;background:var(--paper)}
.go::after{content:"";position:absolute;right:13px;top:50%;width:11px;height:11px;border-top:2px solid var(--paper);border-right:2px solid var(--paper);transform:translateY(-50%) rotate(45deg)}

/* 켜기 전: 겹쳐 쌓인 창 여덟 개 (기울이지 않고 괘선으로만) */
.pile{position:relative;width:100%;aspect-ratio:100 / 89;container-type:inline-size}
.win{position:absolute;left:calc(var(--x) * 1cqw);top:calc(var(--y) * 1cqw);width:60cqw;height:32cqw;overflow:hidden;
  background:var(--paper);border:1px solid var(--dash);
  font-family:var(--mono);font-size:clamp(9.5px,3.3cqw,12.5px);line-height:1.35;color:var(--faint)}
.wt{padding:.42em .9em .4em;border-bottom:1px solid var(--rule-2);font-weight:600;white-space:nowrap}
.wl{padding:.6em .9em 0;white-space:nowrap;overflow:hidden}
.win .bar{margin:.7em .9em 0}
.win.i2{border-color:var(--muted);color:var(--text)}
.win.i2 .wt{border-bottom-color:var(--rule)}
.win.i2 .wl{color:var(--ink)}
.win.i3{border:1px solid var(--ink);box-shadow:inset 0 0 0 1px var(--ink);color:var(--ink)}
.win.i3 .wt{border-bottom-color:var(--ink)}
.bar{display:block;height:.42em;width:72%;margin-top:.7em;background:currentColor;opacity:.26}
.bar.s{width:44%}

/* 칸 (상황판 공용) */
.cells{display:grid;border-top:1px solid var(--rule);border-left:1px solid var(--rule)}
.cell{position:relative;min-width:0;padding:.85em 1em 1em;border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);color:var(--muted)}
.cell .hd{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.15em .8em}
.cell .lab{font-weight:700;color:var(--ink);letter-spacing:.01em}
.cell .st{font-size:.86em;white-space:nowrap}
.cell .st em{font-style:normal;font-family:var(--mono);font-weight:700}
.cell .ln{margin-top:.55em;font-size:.93em;line-height:1.45}
.cell.wait{background:var(--tone);color:var(--text)}
.cell.wait .st{color:var(--ink);font-weight:700}
.cell.idle .lab{color:var(--muted)}
.cell.fail .st{color:var(--fail);font-weight:700}
.cell.next{background:var(--accent);color:var(--on-accent)}
.cell.next .lab,.cell.next .st{color:var(--on-accent);font-weight:700}
.cell.next .ln{font-weight:600}
.cell.pressed{background:var(--ink);color:var(--paper)}
.cell.pressed .lab,.cell.pressed .st{color:var(--paper);font-weight:700}
.cell.pressed .ln{font-weight:600}
.cell.pressed:has(.nxtag){padding-bottom:2.5em}
.nxtag{position:absolute;right:.9em;bottom:.75em;border:1px solid currentColor;font-size:.78em;font-weight:700;line-height:1;padding:.28em .5em}
.cell.next:has(.nxtag){padding-bottom:2.5em}
.ftag{display:inline-block;margin-top:.6em;padding:.12em .5em;border:1px solid var(--fail);font-size:.82em;line-height:1.35;font-weight:600;color:var(--fail)}

/* 켠 뒤: 예시 판 */
.hboard{border:1px solid var(--ink);font-size:13.5px}
.hb-bar{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;padding:8px 12px 0;border-bottom:1px solid var(--rule)}
.hb-url{padding-bottom:7px;font:12px/1.4 var(--mono);color:var(--muted)}
.hb-next{display:flex;align-items:baseline;gap:14px;min-height:46px;padding:12px 14px 11px;border-bottom:1px solid var(--ink);font-size:15px;line-height:1.4}
.hb-next .nx{flex:none;font-size:12.5px;color:var(--muted)}
.nl{display:flex;flex:1;min-width:0;align-items:baseline;gap:12px}
.nl b{flex:none;color:var(--ink)}
.nl .q{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:600;color:var(--ink)}
.nl .t{flex:none;font:400 17px/1 var(--mono);color:var(--ink)}
.nl .t small{margin-left:2px;font:11px/1 var(--sans);color:var(--muted)}
.nl.none .q{font-weight:400;color:var(--muted)}
.hero-cells{grid-template-columns:repeat(4,minmax(0,1fr));border-top:0;border-left:0}
.hero-cells .cell{min-height:7.75em;padding:.75em .95em .9em;transition:background-color .3s,color .3s}
.hero-cells .cell:nth-child(4n){border-right:0}
.hero-cells .cell:nth-last-child(-n+4){border-bottom:0}
.hero-cells .hd{flex-wrap:nowrap}
.tm{flex:none;font-family:var(--mono);font-size:.93em}
.tm small{margin-left:1px;font-family:var(--sans);font-size:.82em}
.hero-cells .st{font-size:.86em;line-height:1.4}
.hero-cells .ln{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden;margin-top:.45em}
.cell .r,.cell .nxs,.cell.ran .w{display:none}
.cell.next .nxs,.cell.ran span.r{display:inline}
.cell.ran p.r{display:-webkit-box}
.cell.wait.ran{background:transparent;color:var(--muted)}
.cell.wait.ran .st{color:inherit;font-weight:400}
.hboard .cell.next::after{content:"";position:absolute;z-index:1;inset:-1px;border:2px solid var(--accent);opacity:0;pointer-events:none;animation:ring 1.3s ease-out .2s 1}
@keyframes ring{0%{inset:-1px;opacity:1}100%{inset:-14px;opacity:0}}

/* ───── 이야기 ───── */
.story{padding-top:var(--gap)}
.flow{list-style:none;margin:0 0 clamp(48px,6vw,88px);padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--ink);border-bottom:1px solid var(--rule)}
.flow li{position:relative;min-width:0}
.flow li:not(:last-child)::after{content:"";position:absolute;right:26px;top:50%;width:9px;height:9px;border-top:1px solid var(--ink);border-right:1px solid var(--ink);transform:translateY(-50%) rotate(45deg)}
.flow a{display:grid;grid-template-columns:auto minmax(0,1fr);column-gap:14px;align-items:center;padding:18px 44px 18px 0;text-decoration:none;color:inherit}
.flow .n{grid-row:1 / span 2;display:grid;place-items:center;width:30px;height:30px;border:1px solid var(--ink);font:600 13px/1 var(--mono);color:var(--ink)}
.flow b{font-size:17px;line-height:1.3;color:var(--ink)}
.flow small{font-size:13.5px;line-height:1.35;color:var(--muted)}
.flow a:hover b{text-decoration:underline;text-underline-offset:.22em}

.scene{display:grid;grid-template-columns:72px minmax(0,1fr);scroll-margin-top:24px}
.rail{display:flex;flex-direction:column;align-items:flex-start}
.num{display:grid;place-items:center;flex:none;width:40px;height:40px;border:1px solid var(--ink);font:600 15px/1 var(--mono);color:var(--ink)}
.wire{position:relative;flex:1;width:1px;min-height:40px;margin:0 0 7px 19.5px;background:var(--ink)}
.wire::after{content:"";position:absolute;left:50%;bottom:1px;width:9px;height:9px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);transform:translateX(-50%) rotate(45deg)}
.wire.end{margin-bottom:0}
.wire.end::after{bottom:0;width:9px;height:9px;border:0;background:var(--ink);transform:translateX(-50%)}
.scene-body{min-width:0;padding-bottom:clamp(64px,7.5vw,112px)}
#s4 .scene-body{padding-bottom:0}

/* 5~8: 같은 레일을 잇되 흐름 화살표는 없다 */
.refs{padding-top:var(--gap)}
.wire.plain{margin-bottom:0;background:var(--rule)}
.wire.plain::after{display:none}
.wire.plain.end::after{display:block;bottom:0;width:7px;height:7px;border:0;background:var(--muted);transform:translateX(-50%)}
.ref .scene-body{padding-bottom:var(--gap)}
.ref:last-child .scene-body{padding-bottom:0}

.scene-head{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(16px,4vw,64px);align-items:end}
.step{font-size:15px;font-weight:700;line-height:40px;color:var(--ink);margin-bottom:clamp(8px,1vw,14px)}
.scene-head h3,.scene-head h2{margin:0;color:var(--ink);font-weight:800;font-size:clamp(30px,4.3vw,62px);line-height:1.1;letter-spacing:-.032em}
html[lang="en"] .scene-head h3,html[lang="en"] .scene-head h2{font-size:clamp(29px,4vw,58px);letter-spacing:-.028em;line-height:1.05}
.lede{max-width:33em;padding-bottom:.35em}
.lede p{font-size:17px}

.plate{margin:clamp(28px,3.2vw,48px) 0 0;border-top:1px solid var(--ink);padding-top:clamp(20px,2.6vw,36px)}
.plate > figcaption,.shot > figcaption{margin-top:clamp(18px,2.2vw,30px);padding-top:12px;border-top:1px solid var(--rule);font-size:14px;line-height:1.6;color:var(--muted)}

/* 터미널 창 */
.term{border:1px solid var(--ink);padding:14px 16px 16px;min-height:168px;font-family:var(--mono);font-size:13px;line-height:1.6;color:var(--text)}
.term.ghost{border:1px dashed var(--dash);color:var(--muted)}
.tl{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.term .bar{height:5px;margin:9px 0}
.term.focus{border-width:2px}
.term.focus .tl{white-space:normal;overflow-wrap:anywhere}
.tbar{display:flex;justify-content:space-between;gap:12px;margin:-14px -16px 12px;padding:7px 16px;border-bottom:1px solid var(--rule);font-family:var(--sans);font-size:13px;font-weight:600;color:var(--muted);word-spacing:normal}
.term.focus .tbar{font-family:var(--mono);font-size:12px;font-weight:400}
.term.ghost .tbar{border-bottom-style:dashed;border-bottom-color:var(--dash)}
.see .tbar{color:var(--ink);font-weight:700;border-bottom-color:var(--ink)}
.tl.strong,.tl.sel{color:var(--ink);font-weight:700}
.note{position:relative;margin-top:8px;font-size:14px;line-height:1.45;font-weight:600;color:var(--text)}
.note::before{content:"";display:block;width:1px;height:14px;margin:0 0 6px 14px;background:currentColor}

/* 1 문제 */
.lost{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(12px,2vw,28px)}
.see .note{color:var(--ink);font-weight:700}
/* 칸이 좁아 한 줄에 안 들어가면 자르지 않고 접는다 */
.lost .tl{white-space:normal;overflow-wrap:anywhere}

/* 2 모으기 */
.gather{display:grid;grid-template-columns:minmax(0,4fr) clamp(120px,13vw,176px) minmax(0,7fr);row-gap:18px;align-items:center}
.who{align-self:start}
.who.w1{grid-column:1;grid-row:1}
.who.w2{grid-column:3;grid-row:1}
.sessions{grid-column:1;grid-row:2}
.join{grid-column:2;grid-row:2}
.page{grid-column:3;grid-row:2}
.who-k{font-size:14.5px;font-weight:700;line-height:1.4;color:var(--ink)}
.who-d{margin-top:4px;font-size:14px;line-height:1.55;color:var(--muted);max-width:31em}
.sessions{display:grid;gap:16px}
.sess{display:flex;flex-direction:column;height:104px;padding:9px 12px 12px;border:1px solid var(--ink)}
.sname{font:12px/1.4 var(--mono);color:var(--muted);margin-bottom:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.panes{flex:1;display:flex;border:1px solid var(--rule)}
.panes > i{flex:1;display:block;padding:9px 10px;border-right:1px solid var(--rule)}
.panes > i:last-child{border-right:0}
.panes b{display:block;height:4px;width:70%;margin-bottom:6px;background:var(--ink);opacity:.3}
.panes b.s{width:42%}
.join{display:flex;align-items:center;align-self:stretch}
.brace{position:relative;flex:none;align-self:stretch;width:22px;margin-block:52px;border:1px solid var(--ink);border-left:0}
.brace::before{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:var(--ink)}
.join .arw{flex:1}

.page,.board{position:relative;border:1px solid var(--ink)}
.url{font:12px/1.4 var(--mono);color:var(--muted);padding:9px 14px;border-bottom:1px solid var(--rule)}
.dh{margin:0;padding:9px 14px;font-size:12px;font-weight:700;letter-spacing:.09em;color:var(--ink)}
.dh span{margin-left:8px;font-weight:400;letter-spacing:0;color:var(--muted)}
.page .cells,.board .cells{border-left:0;font-size:14px}
.desk:last-child .cells{border-bottom:0}
.desk:last-child .cell{border-bottom:0}
.cells.c3{grid-template-columns:repeat(3,minmax(0,1fr))}
.cells.c3 .cell:nth-child(3n){border-right:0}

/* 3 다음 칸 */
.tabbar{display:flex;align-items:flex-end;gap:10px;padding:9px 14px 0;border-bottom:1px solid var(--rule)}
.tab{display:inline-flex;align-items:center;gap:8px;margin-bottom:-1px;padding:6px 16px 7px 10px;border:1px solid var(--rule);border-bottom-color:var(--paper);background:var(--paper);font-size:13px;line-height:1.3;color:var(--ink);white-space:nowrap}
.tab img{display:block;width:14px;height:14px}
.band{position:relative;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-bottom:1px solid var(--rule)}
.stat{min-width:0;padding:14px 16px 16px;border-right:1px solid var(--rule-2);color:var(--muted)}
.stat:nth-child(5){border-right:0}
.stat .k{display:block;font-size:12.5px;line-height:1.3;white-space:nowrap}
.stat .nn{display:block;margin:4px 0 2px;font:400 38px/1.1 var(--mono);letter-spacing:-.02em;color:var(--muted)}
.stat .who{display:block;font-size:12px;line-height:1.3;white-space:nowrap}
.stat.on .k,.stat.on .nn{color:var(--ink)}
.stat.on .nn{font-weight:700}
.nextline{position:relative;display:flex;align-items:baseline;gap:6px 16px;padding:15px 16px;border-bottom:1px solid var(--ink);font-size:16px;line-height:1.4}
.nextline .nx{font-size:12.5px;color:var(--muted)}
.nextline b{color:var(--ink)}
.nextline .q{flex:1;min-width:0;font-weight:600;color:var(--ink)}
.nextline .t{font:400 20px/1 var(--mono);color:var(--ink)}
.nextline .t small{font-size:11px;margin-left:2px;color:var(--muted);font-family:var(--sans)}

.key,.anat-list dt{display:inline-grid;place-items:center;flex:none;width:22px;height:22px;border-radius:50%;border:1px solid var(--ink);background:var(--paper);color:var(--ink);font:600 12px/1 var(--mono)}
.band .key,.nextline .key{position:absolute;right:-11px;top:50%;transform:translateY(-50%)}
.cell .key{position:absolute;left:-11px;top:50%;transform:translateY(-50%)}
.k-tab{margin-bottom:6px}
.keys{list-style:none;margin:clamp(20px,2.4vw,32px) 0 0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px clamp(16px,2.4vw,36px)}
.keys li{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;align-items:start}
.keys p{font-size:14px;line-height:1.55;color:var(--muted)}
.keys b{color:var(--ink)}

/* 4 답하기 */
.act{display:grid;grid-template-columns:minmax(0,1fr) clamp(64px,8vw,112px) minmax(0,1.25fr) clamp(64px,8vw,112px) minmax(0,1fr);align-items:center}
.act > .arw{transform:translateY(-22px)}
.cells.solo{grid-template-columns:minmax(0,1fr);font-size:14.5px}
.act .solo .cell{padding:1em 1.1em 1.2em;min-height:112px}
.ptr{position:absolute;right:22%;bottom:-15px;width:30px;height:30px;fill:var(--paper);stroke:var(--ink);stroke-width:1.5;stroke-linejoin:round}

/* ───── 5 상황판 ───── */
.anat{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(20px,4vw,64px);align-items:start}
.anat-fig .who-k{margin-bottom:14px}
.cells.big{font-size:clamp(15px,1.55vw,21px)}
.big .cell{padding:1.15em 1.25em 1.5em}
.big .cell .hd{align-items:center}
.h1{display:inline-flex;align-items:baseline}
.br{margin-left:.7em;font-family:var(--mono);font-size:.8em;color:var(--muted)}
.tm2{margin-left:.9em;font-family:var(--mono)}
.cell sup{display:inline-grid;place-items:center;width:15px;height:15px;margin-left:3px;border:1px solid var(--ink);border-radius:50%;background:var(--paper);color:var(--ink);font:600 10px/1 var(--mono);vertical-align:.75em;letter-spacing:0}
.big .cell .ln{margin-top:.8em;font-size:1em;font-weight:600;color:var(--ink)}
.anat-list{margin:0}
.anat-list > div{display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;align-items:start;padding:11px 0 12px;border-bottom:1px solid var(--rule)}
.anat-list > div:first-child{padding-top:0}
.anat-list dd{margin:0;font-size:15px;line-height:1.55;color:var(--muted)}
.anat-list b{color:var(--ink)}

.states{margin:clamp(32px,3.6vw,52px) 0 0;border-top:1px solid var(--ink)}
.srow{display:grid;grid-template-columns:clamp(110px,12vw,168px) minmax(0,1fr);gap:16px;align-items:start;padding:16px 0;border-bottom:1px solid var(--rule)}
.states dt,.states dd{margin:0}
.srow dt{font-size:19px;line-height:1.45;letter-spacing:-.01em}
.srow dd{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,360px);gap:14px clamp(20px,4vw,64px);align-items:start}
.srow dd p{font-size:15.5px;line-height:1.6;padding-top:2px}
.s-wait dt,.s-next dt{font-weight:800;color:var(--ink)}
.s-fail dt{font-weight:800;color:var(--fail)}
.s-done dt{font-weight:700;color:var(--ink)}
.s-run dt{font-weight:500;color:var(--text)}
.s-idle dt{font-weight:400;color:var(--faint)}
.cells.sample{font-size:13px}
.sample .cell{padding:.7em .95em .85em}
.sample .cell .ln{margin-top:.35em;padding-top:0;font-size:.95em;line-height:1.45}
.legend-foot{display:flex;align-items:flex-start;justify-content:space-between;gap:20px 48px;margin-top:20px}
.aside{font-size:15px;color:var(--muted);max-width:44em}
.slogan{flex:none;font-size:15px;font-weight:800;line-height:1.2;letter-spacing:.02em;text-align:right;color:var(--ink)}

.shot{margin:clamp(32px,3.6vw,52px) 0 0}
.shot-scroll{border:1px solid var(--rule);overflow:hidden}
.shot picture{display:block}
.shot img{display:block;width:100%;height:auto;aspect-ratio:1920 / 730;object-fit:cover;object-position:left top}
.shot > figcaption{border-top:0;padding-top:0;margin-top:12px}
.swipe{display:none}

/* ───── 6 구조도 ───── */
.arch{display:grid;grid-template-columns:minmax(0,1fr) minmax(176px,.85fr) minmax(0,1.55fr) minmax(176px,.85fr) minmax(0,1fr)}
.arch > .arw{align-self:center}
.arch .only-v{display:none}
.node{display:flex;flex-direction:column;min-width:0;min-height:164px;padding:16px 18px 18px;border:1px solid var(--ink)}
.nt{display:flex;flex-direction:column;gap:3px;min-width:0}
.node b{font-size:17px;line-height:1.35;color:var(--ink)}
.node .m{font:12.5px/1.5 var(--mono);color:var(--muted)}
.node.core{box-shadow:inset 0 0 0 1px var(--ink)}
.inner{margin-top:auto;padding-top:16px;display:flex;align-items:center;font-size:13px;line-height:1.3;color:var(--text)}
.inner > span{flex:none;padding:6px 9px;border:1px solid var(--rule);white-space:nowrap}
.inner .arw{flex:1;min-width:14px}
.inner .arw::after{width:7px;height:7px}
.panes.mini{flex:none;height:46px;margin-top:auto}
.node .panes.mini{margin-inline:auto;width:min(100%,168px)}
.panes.mini > i{padding:0}
.panes.mini .hit{box-shadow:inset 0 0 0 2px var(--ink)}
.panes.mini.grid .hit{background:var(--accent);box-shadow:none}
.back{position:relative;grid-column:1 / -1;height:58px;margin-inline:9.52%;border:1px solid var(--ink);border-top:0;display:flex;flex-direction:row-reverse;align-items:flex-end;justify-content:space-around}
.back::before{content:"";position:absolute;left:-5px;top:1px;width:9px;height:9px;border-left:1px solid var(--ink);border-top:1px solid var(--ink);transform:rotate(45deg)}
.back .lbl{transform:translateY(50%);padding:0 12px;background:var(--paper);font-size:14px;font-weight:600;line-height:1.3;color:var(--ink);white-space:nowrap}
.back .lbl.m{font-family:var(--mono);font-size:13px;font-weight:400}
.back .chev{flex:none;width:9px;height:9px;margin-bottom:-5px;border-left:1px solid var(--ink);border-bottom:1px solid var(--ink);transform:rotate(45deg)}
.arch + figcaption{margin-top:clamp(40px,4vw,56px)}

/* ───── 7 기능 ───── */
.why{list-style:none;margin:clamp(28px,3.2vw,44px) 0 0;padding:0;border-top:1px solid var(--ink)}
.why li{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,5fr) minmax(0,3fr);gap:12px clamp(16px,3.4vw,56px);align-items:start;padding:22px 0 24px;border-bottom:1px solid var(--rule)}
.why h3{margin:0;font-size:20px;line-height:1.4;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.why .d p{font-size:15.5px;line-height:1.65}
.spec{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:8px 10px;padding-top:2px}
.spec .m{font:12.5px/1.4 var(--mono);color:var(--muted)}
.spec .tab{margin:0;border-bottom-color:var(--rule)}
.spec .tab.off{color:var(--muted);padding-left:14px}
.ui{padding:4px 11px;border:1px solid var(--ink);font-size:13px;font-weight:700;line-height:1.3;color:var(--ink);white-space:nowrap}
.ui.thin{border-color:var(--rule);font-weight:500;color:var(--text)}
.ui.thin + .ui.thin{margin-left:-11px}
.ui.mono{font-family:var(--mono);font-size:12.5px}

/* ───── 8 설치 ───── */
.install{margin:clamp(28px,3.2vw,44px) 0 0;border-top:1px solid var(--ink);display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:0 clamp(24px,5vw,80px);align-items:start}
.steps{list-style:none;margin:0;padding:0}
.steps li{display:grid;grid-template-columns:48px minmax(0,1fr);padding:22px 0 26px;border-bottom:1px solid var(--rule)}
.steps li:last-child{border-bottom:0;padding-bottom:0}
.sn{grid-row:1 / span 2;font:500 13px/30px var(--mono);color:var(--muted)}
.steps h3{grid-column:2;margin:0;font-size:20px;line-height:30px;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.steps .do{grid-column:2;min-width:0;margin-top:10px}
.steps .do p{font-size:15px;color:var(--text);max-width:40em}
.steps .do p + .cmd,.steps .do .cmd ~ p{margin-top:12px}
.steps code{font-size:.92em}
.steps .cmd code{font-size:13.5px}
.reqs{padding-top:22px}
.reqs h3{margin:0 0 10px;font-size:14.5px;line-height:30px;font-weight:700;color:var(--ink)}
.req{margin:0;border-top:1px solid var(--rule)}
.req > div{display:grid;grid-template-columns:96px minmax(0,1fr);gap:12px;padding:11px 0;border-bottom:1px solid var(--rule);font-size:15px;line-height:1.5}
.req dt{font-weight:700;color:var(--ink)}
.req dd{margin:0;text-wrap:balance}
.first{margin-top:14px;font-size:14.5px;color:var(--muted)}

/* ───── 푸터 ───── */
.foot{margin-top:var(--gap);border-top:1px solid var(--ink);padding:clamp(40px,6vw,88px) 0 36px}
.closing{color:var(--ink);font-weight:800;font-size:clamp(34px,5.6vw,82px);line-height:1.08;letter-spacing:-.035em;margin-bottom:clamp(44px,6vw,96px)}
.foot-row{display:flex;flex-wrap:wrap;align-items:center;gap:18px 36px;padding-top:24px;border-top:1px solid var(--rule)}
.foot .brand img{height:24px}
.tagline{font-size:14.5px;font-weight:800;letter-spacing:.03em;color:var(--ink)}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 28px;margin:0 0 0 auto;padding:0;list-style:none;font-size:14.5px;color:var(--muted)}

/* ───── 반응형 ───── */
@media (max-width:1180px){
  /* 구조도: 세로 흐름. 상자는 전체 폭, 마지막에 '그 칸' 상자로 고리를 닫는다 */
  .arch{grid-template-columns:minmax(0,1fr)}
  .node{min-height:0;flex-direction:row;align-items:center;justify-content:space-between;gap:16px 24px;padding:18px 20px}
  .node .panes.mini{margin:0;width:168px}
  .node .inner{margin:0;padding:0}
  .arch > .arw{width:1px;height:64px;min-width:0;margin:0 auto 7px 28px;justify-self:start}
  .arch > .arw::after{right:auto;left:50%;top:auto;bottom:1px;transform:translateX(-50%) rotate(135deg)}
  .arch > .arw > span{left:16px;bottom:auto;top:50%;transform:translateY(-50%);text-align:left}
  .back{display:none}
  .arch .only-v{display:flex}
  .arch > .arw.only-v{display:block;height:76px}
  .arch + figcaption{margin-top:clamp(18px,2.2vw,30px)}
}

@media (max-width:1100px){
  .nav{display:none}
  .top-end{margin-left:auto}
  .keys{grid-template-columns:repeat(2,minmax(0,1fr))}
  .why li{grid-template-columns:minmax(0,4fr) minmax(0,6fr)}
  .spec{grid-column:2;justify-content:flex-start}
  .srow dd{grid-template-columns:minmax(0,1fr) minmax(0,300px)}
  .ba{grid-template-columns:minmax(0,4.4fr) 64px minmax(0,7.6fr)}
  .hboard{font-size:12.5px}
}

@media (max-width:960px){
  .hero-side{grid-template-columns:minmax(0,1fr);gap:16px}
  .sub{max-width:32em}
}

@media (max-width:900px){
  body{font-size:16px}
  .top-in{height:60px;gap:14px}
  .brand img{height:22px}
  .top-end{gap:12px}
  .lang button{padding:8px 9px}
  .gh{padding:6px 10px}

  .scene-head{grid-template-columns:minmax(0,1fr);align-items:start}
  .lede{padding-bottom:0}

  .cmd{flex-direction:column}
  .copy{min-height:40px;border-left:0;border-top:1px solid var(--ink)}
  .cmd code{font-size:12.5px;padding:11px 12px}
  .steps .cmd code{font-size:12.5px}

  /* 전 / 후: 세로. 더미는 낮은 띠로 줄여 판이 첫 화면에 걸리게 한다 */
  .ba{grid-template-columns:minmax(0,1fr)}
  .ba-half{padding:10px 0 16px}
  .ba-before{padding-bottom:6px}
  .ba-before .ba-label{margin-bottom:6px}
  .pile{aspect-ratio:100 / 44;max-width:520px}
  .win{left:calc(var(--mx) * 1cqw);top:calc(var(--my) * 1cqw);width:34cqw;height:20cqw;font-size:clamp(9.5px,2.85cqw,13px)}
  .win .bar.s,.win .cur,.win.i1 .wl{display:none}
  .wt{padding:.3em .6em}
  .wl{padding:.4em .6em 0}
  .win .bar{margin:.55em .8em 0}
  .ba-note{margin-top:8px;font-size:13px}
  /* 넓은 세로 화면: 더미 옆 빈 자리에 설명을 둔다 */
  @media (min-width:740px){
    .ba-before{display:grid;grid-template-columns:minmax(0,520px) minmax(0,1fr);column-gap:28px;align-items:end}
    .ba-before .ba-label{grid-column:1 / -1}
    .ba-before .ba-note{margin:0 0 6px;font-size:15px;color:var(--text);max-width:11em}
  }
  .ba-mid{height:46px}
  .ba-mid::before{left:0;right:0;top:50%;bottom:auto;width:auto;height:1px}
  .go{width:38px;height:38px;transform:rotate(90deg)}
  .go::before{left:9px;right:10px}
  .go::after{right:10px;width:10px;height:10px}
  .hero-cells{grid-template-columns:repeat(2,minmax(0,1fr));font-size:13px}
  .hero-cells .cell:nth-child(4n){border-right:1px solid var(--rule)}
  .hero-cells .cell:nth-child(2n){border-right:0}
  .hero-cells .cell:nth-last-child(-n+4){border-bottom:1px solid var(--rule)}
  .hero-cells .cell:nth-last-child(-n+2){border-bottom:0}
  .hero-cells .cell{padding:.7em .8em .85em}
  .hb-next{flex-wrap:wrap;gap:2px 10px;padding:10px 12px;font-size:14px}
  .nl{flex-wrap:wrap;gap:2px 10px;min-height:calc(2.8em + 2px)}
  .nl .q{flex:1 0 100%;order:3;white-space:normal}
  .nl .t{margin-left:auto;font-size:15px}

  .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow li:nth-child(-n+2){border-bottom:1px solid var(--rule)}
  .flow li::after{display:none}
  .flow a{padding:14px 8px 14px 0;column-gap:10px}
  .flow b{font-size:16px}
  .flow small{font-size:12.5px}

  /* 장면: 레일을 위로 눕힌다 */
  .scene{grid-template-columns:minmax(0,1fr)}
  .scene > .rail{flex-direction:row;align-items:center;margin-bottom:10px}
  .scene > .rail .num{width:34px;height:34px;font-size:14px}
  .scene > .rail .wire{flex:1;width:auto;height:1px;min-height:0;margin:0}
  .scene > .rail .wire::after{display:none}
  .step{line-height:1.4;margin-bottom:8px}
  .scene-body{padding-bottom:20px}
  .ref .scene-body{padding-bottom:72px}
  .story .scene:not(#s4) .scene-body::after{content:"";display:block;width:11px;height:56px;margin:28px 0 0 11.5px;background:var(--ink);
    -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='56' fill='none' stroke='black'%3E%3Cpath d='M5.5 0v55M1 50.5l4.5 4.5 4.5-4.5'/%3E%3C/svg%3E") no-repeat;
    mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='56' fill='none' stroke='black'%3E%3Cpath d='M5.5 0v55M1 50.5l4.5 4.5 4.5-4.5'/%3E%3C/svg%3E") no-repeat}

  .lost{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 12px}
  .term{min-height:136px;padding:12px 12px 14px;font-size:12px}
  .lost .tl{white-space:normal;overflow-wrap:anywhere}
  .tbar{margin:-12px -12px 10px;padding:6px 12px;font-size:12.5px}
  .note{font-size:13px}

  .gather{grid-template-columns:minmax(0,1fr);row-gap:0}
  .who.w1,.who.w2,.sessions,.join,.page{grid-column:1;grid-row:auto}
  .who{margin-bottom:12px}
  .sessions{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
  .sess{height:84px;padding:7px 8px 8px}
  .sname .pre{display:none}
  .panes > i{padding:7px 5px}
  .join{flex-direction:column;align-items:center;margin-bottom:8px}
  .brace{align-self:stretch;width:auto;height:18px;margin:0 16.66%;border:1px solid var(--ink);border-top:0}
  .brace::before{left:50%;right:auto;top:0;bottom:0;width:1px;height:auto}
  .join .arw{flex:none;width:1px;height:48px;min-width:0;margin-bottom:7px}
  .join .arw::after{right:auto;left:50%;top:auto;bottom:1px;transform:translateX(-50%) rotate(135deg)}
  .join .arw > span{left:14px;bottom:auto;top:50%;transform:translateY(-50%)}

  .page .cells,.board .cells{font-size:12.5px}
  /* 3칸 데스크는 2열로 접고, 남는 셋째 칸은 한 줄을 다 써서 구멍을 없앤다 */
  .board .cells.c3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .board .cells.c3 .cell{border-right:1px solid var(--rule);border-bottom:1px solid var(--rule)}
  .board .cells.c3 .cell:nth-child(2n){border-right:0}
  .board .cells.c3 .cell:nth-child(3):last-child{grid-column:1 / -1;border-right:0}
  .board .desk:last-child .cells.c3 .cell{border-bottom:0}
  .cell .key{top:0}
  .page .cells.c3{grid-template-columns:repeat(3,minmax(0,1fr));font-size:11.5px}
  .page .cell{padding:.7em .65em .8em}
  .page .cell .hd{display:block}
  .page .cell .st{display:block;margin-top:.15em}
  .cell{padding:.75em .8em .9em}
  .band .stat{padding:10px 8px 12px}
  .stat .k{font-size:10.5px;letter-spacing:-.02em}
  .stat .nn{font-size:26px}
  .stat .who{display:none}
  .nextline{flex-wrap:wrap;padding:12px 12px;font-size:14.5px}
  .nextline .q{flex:1 0 100%;order:5}
  .nextline .t{margin-left:auto;font-size:17px}
  .keys{grid-template-columns:minmax(0,1fr);gap:12px}

  .act{grid-template-columns:minmax(0,1fr)}
  .act > .arw{transform:none;width:1px;height:52px;min-width:0;margin:10px auto 17px 28px;justify-self:start}
  .act > .arw::after{right:auto;left:50%;top:auto;bottom:1px;transform:translateX(-50%) rotate(135deg)}
  .act > .arw > span{left:16px;bottom:auto;top:50%;transform:translateY(-50%)}

  .anat{grid-template-columns:minmax(0,1fr)}
  .srow{grid-template-columns:minmax(0,1fr);gap:6px;padding:14px 0 16px}
  .srow dd{grid-template-columns:minmax(0,1fr);gap:10px}
  .legend-foot{flex-direction:column}
  .slogan{text-align:left}
  /* 실제 화면은 줄이지 않고 옆으로 밀어 본다 */
  .shot-scroll{overflow-x:auto}
  .shot img{width:auto;max-width:none;height:330px}
  .swipe{display:inline}

  .node{flex-direction:column;align-items:flex-start}
  .why li{grid-template-columns:minmax(0,1fr);padding:18px 0 20px}
  .spec{grid-column:1}
  .why h3{font-size:18.5px}
  .install{grid-template-columns:minmax(0,1fr)}
  .steps li{grid-template-columns:36px minmax(0,1fr)}
  .steps .do{grid-column:1 / -1}
  .steps .cmd code{white-space:normal;overflow-wrap:anywhere;overflow-x:visible}
  .steps li:last-child{padding-bottom:26px;border-bottom:1px solid var(--rule)}
  .foot-links{margin-left:0;width:100%}
}

@media (max-width:700px){
  .br-m{display:inline}
}

@media (max-width:420px){
  .lang button{padding:8px 7px;font-size:12px}
  .stat .k{font-size:10px}
  .cmd code{font-size:12px}
  .cmd .ps{display:none}
}

@media (max-width:360px){
  .top-in{gap:8px}
  .top-end{gap:8px}
  .lang button{padding:8px 5px}
  .gh{padding:6px 8px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
}