@charset "utf-8";
/* ==========================================================================
   덩크버거 — P5 키네틱 볼드 / 아키타입 B: 풀스크린 스냅 챕터
   명세서: AIPM v2.5 / 프리셋 P5 / 히어로 A안

   구조: .chapter 6개가 각각 100svh. scroll-snap-type:y proximity (데스크톱만).
   ★ 핀이 걸린 .ch-stack 은 scroll-snap-align:none — 스냅이 핀을 방해하면 안 된다.
   ⚠ scroll-behavior:smooth 전역 금지 (Lenis 충돌) — 모바일에서만
   ⚠ 애시드 그린 단일 액센트 금지 (AI-티 조합)
   ========================================================================== */

:root{
  --carbon:#101010;
  --carbon-2:#181818;
  --paper:#F4F2ED;
  --accent:#FF5A1F;
  --accent-dk:#E04512;
  --line:rgba(244,242,237,.14);
  --line-dk:rgba(16,16,16,.12);

  --display:'Anton',Impact,'Pretendard Variable',sans-serif;
  --sans:'Pretendard Variable',Pretendard,-apple-system,'Noto Sans KR',sans-serif;
  --mono:'IBM Plex Mono','SF Mono',Consolas,monospace;

  --wrap:1320px;
  --gut:clamp(20px,4vw,48px);
  --board-w:clamp(96px,10vw,150px);
}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);background:var(--carbon);color:var(--paper);
  font-size:16px;line-height:1.7;word-break:keep-all;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:#fff}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.mono{font-family:var(--mono)}
.pc-br{display:none}
@media(min-width:768px){.pc-br{display:inline}}

/* 사진 톤 통일 — 명세서 §03 */
.hero-fig img,.mitem figure img,.combo-fig img,.shake-fig img,.store-media img{
  filter:contrast(1.12) saturate(1.06);
}

/* ---------- 로딩 커튼 ---------- */
.curtain{position:fixed;inset:0;z-index:200;background:var(--carbon);display:grid;place-items:center}
.curtain-word{
  font-family:var(--display);font-size:clamp(56px,14vw,180px);line-height:1;
  letter-spacing:.02em;color:var(--paper);
}
.curtain-bar{width:min(240px,50vw);height:3px;background:rgba(244,242,237,.18);margin:22px auto 0}
.curtain-bar span{display:block;height:100%;width:0;background:var(--accent)}

/* ---------- 타이포 ---------- */
.h2{
  font-family:var(--display);font-weight:400;
  font-size:clamp(34px,6.2vw,86px);line-height:.98;letter-spacing:.005em;
}
.label{font-family:var(--mono);font-size:10.5px;letter-spacing:.34em;color:var(--accent);font-weight:600}
.sec-lead{margin-top:18px;color:rgba(244,242,237,.62);font-size:clamp(14.5px,1.6vw,17px);max-width:56ch}
.sec-head{margin-bottom:clamp(26px,4vw,54px)}
.sec-head .h2{margin-top:14px}

/* ---------- 버튼 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:16px 30px;border-radius:2px;font-size:14.5px;font-weight:800;
  letter-spacing:.01em;transition:background .2s,color .2s,border-color .2s;will-change:transform;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dk)}
.btn-ghost{border:2px solid rgba(244,242,237,.3);color:var(--paper)}
.btn-ghost:hover{border-color:var(--paper)}
.btn-naver{background:#03C75A;color:#fff}
.btn-naver:hover{background:#02A64B}
.btn-mini{padding:11px 18px;font-size:12.5px;background:var(--accent);color:#fff}

/* ---------- 헤더 ---------- */
.site-head{position:fixed;top:0;left:0;right:0;z-index:90;
  border-bottom:1px solid transparent;transition:background .35s,border-color .35s}
.site-head.is-stuck{background:rgba(16,16,16,.92);border-bottom-color:var(--line);backdrop-filter:blur(8px)}
.head-inner{display:flex;align-items:center;gap:24px;height:72px}
.logo{display:flex;align-items:center;gap:9px}
.logo-badge{width:26px;height:26px;border-radius:50%;background:var(--accent);color:#fff;
  display:grid;place-items:center;flex-shrink:0}
.logo-txt{font-family:var(--display);font-size:19px;letter-spacing:.04em}
.gnb{display:none;gap:28px;margin-left:auto;font-family:var(--mono);font-size:12px;
  letter-spacing:.14em;color:rgba(244,242,237,.66)}
@media(min-width:900px){.gnb{display:flex}}
.gnb a:hover{color:var(--accent)}
@media(max-width:899px){.btn-mini{margin-left:auto}}

/* ==========================================================================
   ★ 아키타입 B — 스냅 챕터
   ========================================================================== */
.chapters{position:relative;z-index:2}

/* 스냅은 데스크톱에서만. proximity라 답답하지 않다. */
@media(min-width:1024px) and (prefers-reduced-motion:no-preference){
  html{scroll-snap-type:y proximity}
  .chapter{scroll-snap-align:start;scroll-snap-stop:normal}
  /* ★ 핀 구간은 스냅 제외 — 스냅이 핀 스크럽을 튕겨내면 시그니처가 깨진다 */
  .ch-stack{scroll-snap-align:none}
  /* 마지막 장은 푸터 때문에 100svh를 넘으므로 시작점 정렬 */
  .ch-store{scroll-snap-align:start}
}

.chapter{
  position:relative;
  min-height:100svh;
  display:flex;flex-direction:column;justify-content:center;
  padding:clamp(96px,11vh,132px) 0 clamp(52px,7vh,88px);
  /* ⚠ overflow:hidden 금지 — 핀 구간과 내용이 100svh를 넘는 장에서 잘린다 */
}
.ch-inner{position:relative;z-index:3;width:100%}
@media(min-width:1024px){
  .chapter{padding-right:var(--board-w)}
}

/* 장 배경 — 장이 바뀌면 교체된다 */
.stage-bgs{position:fixed;inset:0;z-index:0;pointer-events:none;background:var(--carbon)}
.sbg{position:absolute;inset:0;opacity:0;transition:opacity .85s cubic-bezier(.16,1,.3,1)}
.sbg.is-on{opacity:1}
.sbg[data-bg="0"]{
  background:
    radial-gradient(70% 60% at 78% 42%,rgba(255,90,31,.22) 0%,transparent 62%),
    radial-gradient(50% 50% at 12% 78%,rgba(255,90,31,.10) 0%,transparent 60%),
    var(--carbon);
}
/* THE STACK: 레이어가 screen 블렌드로 지워지려면 배경이 순수 검정이어야 한다 */
.sbg[data-bg="1"]{background:#000}
.sbg[data-bg="2"]{background:var(--paper)}
.sbg[data-bg="3"]{
  background:
    radial-gradient(60% 55% at 22% 30%,rgba(255,90,31,.16) 0%,transparent 64%),
    var(--carbon);
}
.sbg[data-bg="4"]{
  background:
    radial-gradient(56% 60% at 82% 66%,rgba(255,90,31,.13) 0%,transparent 62%),
    var(--carbon-2);
}
.sbg[data-bg="5"]{background:#0B0B0B}

/* ★ GSAP 실패 시 .sbg 교체가 일어나지 않는다 → 각 장이 자기 배경을 직접 갖는다 (함정 5) */
html:not(.js-anim) .stage-bgs{display:none}
html:not(.js-anim) .ch-hero{background:
  radial-gradient(70% 60% at 78% 42%,rgba(255,90,31,.22) 0%,transparent 62%),var(--carbon)}
html:not(.js-anim) .ch-stack{background:#000}
html:not(.js-anim) .ch-menu{background:var(--paper)}
html:not(.js-anim) .ch-combo{background:var(--carbon)}
html:not(.js-anim) .ch-shake{background:var(--carbon-2)}
html:not(.js-anim) .ch-store{background:#0B0B0B}

/* 초대형 타이포 — 장 전환 시 밀려 들어온다 */
.mega{
  position:absolute;z-index:1;pointer-events:none;user-select:none;
  font-family:var(--display);font-weight:400;line-height:.78;
  letter-spacing:-.01em;white-space:nowrap;
}
.mega-hero{
  left:calc(var(--gut) * -.4);bottom:-2vh;
  font-size:clamp(120px,26vw,420px);
  color:rgba(244,242,237,.045);
}
.mega-menu{
  right:2vw;top:6vh;
  font-size:clamp(90px,20vw,320px);
  color:rgba(16,16,16,.055);
}
.mega-combo{
  left:-1vw;top:4vh;
  font-size:clamp(90px,19vw,300px);
  color:rgba(255,90,31,.075);
}
.mega-shake{
  right:-3vw;bottom:2vh;
  font-size:clamp(80px,16vw,260px);
  color:rgba(244,242,237,.05);
}

/* ---------- ★ 챕터 인디케이터 — 스코어보드 ---------- */
.board{
  position:fixed;right:clamp(12px,1.6vw,26px);top:50%;transform:translateY(-50%);
  z-index:80;display:none;flex-direction:column;gap:12px;
  background:rgba(8,8,8,.82);border:2px solid rgba(244,242,237,.16);
  padding:12px 12px 10px;border-radius:3px;backdrop-filter:blur(6px);
  box-shadow:0 0 0 1px rgba(0,0,0,.5),0 12px 40px rgba(0,0,0,.5);
}
/* ★ 스코어보드는 JS가 구동한다 — GSAP 실패 시(js-anim 제거) 숨긴다 */
@media(min-width:1024px) and (prefers-reduced-motion:no-preference){
  html.js-anim .board{display:flex}
}
.board-top{display:flex;align-items:baseline;justify-content:space-between;gap:10px;
  border-bottom:1px solid rgba(244,242,237,.16);padding-bottom:8px}
.board-lbl{font-size:8.5px;letter-spacing:.28em;color:rgba(244,242,237,.4)}
.board-seg{
  font-family:var(--mono);font-size:22px;font-weight:600;line-height:1;
  color:var(--accent);letter-spacing:.02em;
  text-shadow:0 0 12px rgba(255,90,31,.55);
}
.board-list{list-style:none;display:flex;flex-direction:column;gap:7px}
.brd{display:grid;grid-template-columns:auto 16px 1fr;align-items:center;gap:8px;
  color:rgba(244,242,237,.34);transition:color .4s}
.brd-num{font-size:9.5px;letter-spacing:.14em;font-weight:600}
.brd-bar{display:block;height:3px;width:10px;background:rgba(244,242,237,.2);
  transition:width .5s cubic-bezier(.16,1,.3,1),background .4s;justify-self:start}
.brd-name{font-family:var(--mono);font-size:8.5px;letter-spacing:.1em;white-space:nowrap;
  opacity:.4;transition:opacity .4s}
.brd:hover{color:rgba(244,242,237,.8)}
.brd.is-on{color:var(--accent)}
.brd.is-on .brd-bar{width:16px;background:var(--accent);box-shadow:0 0 8px rgba(255,90,31,.7)}
.brd.is-on .brd-name{opacity:1}
.board-clock{border-top:1px solid rgba(244,242,237,.16);padding-top:8px;
  font-size:10px;letter-spacing:.16em;color:rgba(244,242,237,.45);text-align:right}

/* ---------- ★ 커스텀 커서 (데스크톱) ---------- */
.cursor{position:fixed;left:0;top:0;z-index:150;pointer-events:none;opacity:0;
  display:none;transform:translate(-50%,-50%)}
html.has-cursor .cursor{display:block}
.cursor-dot{
  display:block;width:26px;height:26px;border-radius:50%;
  background:var(--accent);
  transform:translate(-50%,-50%);
  transition:width .3s cubic-bezier(.16,1,.3,1),height .3s cubic-bezier(.16,1,.3,1),
             background .3s,opacity .3s;
}
.cursor-label{
  position:absolute;left:0;top:0;transform:translate(-50%,-50%);
  font-size:9px;letter-spacing:.18em;font-weight:600;color:#fff;
  opacity:0;transition:opacity .28s;white-space:nowrap;
}
.cursor.is-big .cursor-dot{width:82px;height:82px;background:rgba(255,90,31,.9)}
.cursor.is-big .cursor-label{opacity:1}
html.has-cursor,html.has-cursor a,html.has-cursor button{cursor:none}

/* ---------- 章 01 히어로 ---------- */
.ch-hero{overflow:hidden}
.hero-grid{display:grid;gap:clamp(28px,4vw,56px);align-items:center}
@media(min-width:960px){.hero-grid{grid-template-columns:6fr 5fr}}
.kicker{display:flex;align-items:center;gap:10px;font-size:11px;letter-spacing:.28em;
  color:var(--accent);margin-bottom:24px;font-weight:600}
.kicker .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);flex-shrink:0}
.hero-h1{font-family:var(--display);font-weight:400;
  font-size:clamp(46px,9.6vw,140px);line-height:.92;letter-spacing:.005em}
.hero-h1 .hl{display:block;overflow:hidden}
.hero-h1 .accent{color:var(--accent)}
.hero-lead{margin-top:26px;font-size:clamp(15px,1.8vw,18px);color:rgba(244,242,237,.68);max-width:44ch}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:34px}
.hero-fig{position:relative}
.hero-fig img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:3px;will-change:transform}
.ch-foot{position:relative;z-index:3;display:flex;justify-content:space-between;align-items:center;
  margin-top:clamp(24px,4vh,52px);padding-top:16px;border-top:1px solid var(--line);
  font-size:10.5px;letter-spacing:.22em;color:rgba(244,242,237,.45);width:100%}
@media(min-width:1024px){.ch-foot{padding-right:0}}
.scroll-tag{display:flex;align-items:center;gap:10px}
.scroll-tag i{display:block;width:36px;height:2px;background:rgba(244,242,237,.25);position:relative;overflow:hidden}
.scroll-tag i::after{content:"";position:absolute;inset:0;background:var(--accent);
  animation:sweep 1.9s cubic-bezier(.7,0,.3,1) infinite}
@keyframes sweep{0%{transform:translateX(-100%)}60%,100%{transform:translateX(100%)}}

/* ---------- 章 02 ★ THE STACK (분해도 · 핀) ---------- */
/* 핀 대상은 .stack-stage. 장 자체는 패딩 없이 스테이지가 100svh를 채운다. */
.ch-stack{padding:0;display:block}
.stack-stage{min-height:100svh;display:flex;align-items:center;
  padding:clamp(84px,10vh,120px) 0 clamp(40px,6vh,72px);overflow:hidden;
  background:#000;position:relative;z-index:3}
@media(min-width:1024px){.stack-stage{padding-right:var(--board-w)}}
.stack-inner{width:100%}
.stack-head{text-align:center;margin-bottom:clamp(14px,2vw,28px)}
.stack-title{font-family:var(--display);font-size:clamp(38px,7.4vw,96px);line-height:.92;
  margin-top:12px;letter-spacing:.01em}
.stack-sub{margin-top:12px;color:rgba(244,242,237,.55);font-size:14px}
.stack-body{display:grid;gap:clamp(20px,3vw,44px);align-items:center}
@media(min-width:900px){.stack-body{grid-template-columns:5fr 6fr}}

/* 분해 시 레이어가 위아래로 벌어지므로 컨테이너에 여유 높이를 준다 */
.layers{position:relative;width:min(320px,64vw);margin:0 auto;aspect-ratio:1/1}
/* 레이어 소스는 순수 검정 배경의 컷아웃 → screen 블렌드로 검정을 날린다.
   z-index: 열린박스(1) < 버거 레이어(2) — 버거가 박스 안쪽에 놓인 것처럼 보인다 */
.layer{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:contain;
  will-change:transform;mix-blend-mode:screen;z-index:2}

/* ★ Physics2D — 안착 순간 튀는 참깨·부스러기 */
.crumbs{position:absolute;left:50%;top:62%;width:0;height:0;z-index:4;pointer-events:none}
.crumb{position:absolute;left:0;top:0;border-radius:50%;opacity:0;will-change:transform,opacity}
.crumb.c-seed{width:7px;height:5px;background:#E8C88A;border-radius:50%/60%}
.crumb.c-bit{width:5px;height:5px;background:#8A5A2B}
.crumb.c-hot{width:5px;height:5px;background:var(--accent)}

/* 마지막 장면: 합쳐진 버거를 받아내는 콤보 박스 */
/* 뚜껑 열린 박스 — 순수 검정 컷아웃이므로 screen 블렌드로 배경을 날린다. */
.stack-boxopen{
  position:absolute;left:50%;top:56%;height:96%;width:auto;
  transform:translate(-50%,-50%);object-fit:contain;
  opacity:0;pointer-events:none;will-change:transform,opacity;
  mix-blend-mode:screen;z-index:1;
}
/* 담긴 콤보 박스는 배경이 있는 사진 → 가장자리 페이드로 경계를 없앤다 */
.stack-box{
  position:absolute;left:50%;top:50%;width:124%;height:auto;
  transform:translate(-50%,-50%);object-fit:contain;
  opacity:0;pointer-events:none;will-change:transform,opacity;
  -webkit-mask-image:radial-gradient(ellipse 62% 62% at 50% 50%,#000 58%,transparent 92%);
  mask-image:radial-gradient(ellipse 62% 62% at 50% 50%,#000 58%,transparent 92%);
  z-index:3;
}
/* 라벨과 아웃트로가 같은 자리를 공유한다 */
.stack-side{position:relative;min-height:clamp(230px,32vh,310px);display:flex;align-items:center}
.stack-side .specs{width:100%}
.stack-outro{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;
  opacity:0;pointer-events:none}
.stack-outro .label{margin-bottom:10px}
.outro-h{font-family:var(--display);font-size:clamp(40px,6.4vw,86px);line-height:.95;letter-spacing:.02em}
.outro-sub{margin-top:12px;color:rgba(244,242,237,.6);font-size:14.5px}

.specs{list-style:none;display:grid;gap:clamp(10px,1.6vw,18px);position:relative}
.spec{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;align-items:baseline;
  padding-bottom:13px;border-bottom:1px solid var(--line)}
.spec .sp-no{grid-row:span 2;font-size:12px;color:var(--accent);font-weight:600;letter-spacing:.1em}
.spec b{font-family:var(--display);font-size:clamp(18px,2.4vw,28px);letter-spacing:.01em;font-weight:400}
.spec i{grid-column:2;font-style:normal;font-size:13.5px;color:rgba(244,242,237,.55)}

.stack-progress{max-width:220px;margin:clamp(20px,3vh,38px) auto 0;height:2px;background:rgba(244,242,237,.16)}
.stack-progress span{display:block;height:100%;width:0;background:var(--accent)}

/* ---------- 章 03 메뉴 ---------- */
.ch-menu{color:var(--carbon);overflow:hidden}
.ch-menu .label{color:var(--accent-dk)}
.ch-menu .sec-lead{color:rgba(16,16,16,.62)}
.menu-list{display:grid;gap:clamp(18px,2.4vw,30px)}
@media(min-width:900px){.menu-list{grid-template-columns:repeat(3,1fr)}}
/* ★ 3D 틸트 카드 — 원근을 부모에 준다 */
.tilt{perspective:900px}
.mitem{background:#fff;border:2px solid var(--carbon);display:flex;flex-direction:column;
  transform-style:preserve-3d;will-change:transform}
.mitem figure{overflow:hidden;border-bottom:2px solid var(--carbon)}
.mitem figure img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .8s cubic-bezier(.16,1,.3,1)}
.mitem:hover figure img{transform:scale(1.06)}
.mbody{padding:clamp(16px,2.2vw,26px);display:flex;flex-direction:column;flex:1}
.mno{font-size:11px;letter-spacing:.2em;color:var(--accent-dk);font-weight:600}
.mitem h3{font-family:var(--display);font-size:clamp(21px,2.8vw,32px);margin:8px 0 10px;
  letter-spacing:.01em;font-weight:400;line-height:1.05}
.mitem p{font-size:14px;color:rgba(16,16,16,.66);margin-bottom:18px}
.price{margin-top:auto;display:grid;gap:6px;border-top:2px solid var(--carbon);padding-top:14px}
.price>div{display:flex;justify-content:space-between;font-size:14px}
.price dt{color:rgba(16,16,16,.55)}
.price dd{font-weight:700;font-variant-numeric:tabular-nums}
.price-note{margin-top:22px;font-size:11px;letter-spacing:.06em;color:rgba(16,16,16,.45)}

/* ---------- 章 04 콤보 ---------- */
.ch-combo{overflow:hidden}
.combo-grid{display:grid;gap:clamp(28px,4vw,60px);align-items:center}
@media(min-width:900px){.combo-grid{grid-template-columns:5fr 6fr}}
.combo-list{list-style:none;margin:24px 0 30px;display:grid;gap:10px}
.combo-list li{position:relative;padding-left:20px;font-size:14.5px;color:rgba(244,242,237,.66)}
.combo-list li::before{content:"";position:absolute;left:0;top:11px;width:10px;height:2px;background:var(--accent)}
.combo-fig{transform-style:preserve-3d}
.combo-fig img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:3px;will-change:transform}

/* ---------- 章 05 셰이크 ---------- */
.ch-shake{overflow:hidden}
.shake-grid{display:grid;gap:clamp(28px,4vw,60px);align-items:center}
@media(min-width:900px){.shake-grid{grid-template-columns:4fr 6fr}}
.shake-fig{transform-style:preserve-3d}
.shake-fig img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:3px;
  max-height:60svh;will-change:transform}
.big-nums{display:grid;gap:clamp(14px,2vw,24px);margin:clamp(22px,3vw,36px) 0}
@media(min-width:600px){.big-nums{grid-template-columns:repeat(3,1fr)}}
/* 스코어보드 톤 — 숫자가 ScrambleText로 확정된다 */
.bn{border-top:2px solid var(--accent);padding-top:14px}
.bn b{display:block;font-family:var(--display);font-size:clamp(38px,5.8vw,72px);
  line-height:1;color:var(--paper);letter-spacing:.01em;font-variant-numeric:tabular-nums}
.bn span{display:block;margin-top:8px;font-size:12.5px;color:rgba(244,242,237,.55);letter-spacing:.04em}

/* ---------- 章 06 매장 ---------- */
.ch-store{overflow:hidden;justify-content:flex-start;padding-bottom:0}
.store-media{position:absolute;inset:-6% 0 0;z-index:1}
.store-media img{width:100%;height:100%;object-fit:cover;will-change:transform;opacity:.26}
.ch-store::after{content:"";position:absolute;inset:0;z-index:2;
  background:linear-gradient(180deg,rgba(16,16,16,.72),rgba(16,16,16,.95))}
.store-cap{position:relative;z-index:3;margin-top:clamp(20px,5vh,60px)}
.store-info{display:grid;gap:clamp(20px,3vw,40px);margin-top:clamp(22px,3.2vw,40px)}
@media(min-width:800px){.store-info{grid-template-columns:1fr auto;align-items:end}}
.store-info dl{display:grid;gap:12px}
.store-info dl>div{display:grid;grid-template-columns:70px 1fr;gap:14px;font-size:14.5px}
.store-info dt{color:rgba(244,242,237,.45);font-size:12px;letter-spacing:.1em;padding-top:2px}
.store-cta{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- 푸터 (章 06 안에 들어간다) ---------- */
.site-foot{position:relative;z-index:3;background:rgba(8,8,8,.72);color:rgba(244,242,237,.6);
  padding:clamp(34px,4vw,56px) 0 clamp(30px,4vw,48px);margin-top:clamp(28px,5vh,64px);
  border-top:1px solid var(--line);backdrop-filter:blur(4px)}
@media(min-width:1024px){.site-foot{padding-right:var(--board-w)}}
.foot-inner{display:grid;gap:22px}
@media(min-width:900px){.foot-inner{grid-template-columns:1fr 1fr;align-items:start}}
.foot-brand .logo-txt{font-size:22px}
.foot-brand .mono{font-size:10px;letter-spacing:.24em;color:rgba(244,242,237,.35);margin-top:8px}
.foot-info p{font-size:13px;line-height:1.9}
.foot-note{grid-column:1/-1;border-top:1px solid var(--line);padding-top:20px;display:grid;gap:9px}
.foot-note p{font-size:12px;color:rgba(244,242,237,.42);line-height:1.8}
.demo-badge{display:inline-block;border:1px solid var(--accent);color:var(--accent) !important;
  padding:9px 16px;font-size:12.5px !important}
.demo-badge b{color:#fff}
.made-by{letter-spacing:.2em;font-size:10px !important;color:rgba(244,242,237,.28) !important}

/* ---------- 모바일 고정 CTA ---------- */
.mobile-bar{display:none}
@media(max-width:768px){
  .mobile-bar{display:grid;grid-template-columns:1fr 1fr;gap:2px;position:fixed;
    left:0;right:0;bottom:0;z-index:95;background:var(--carbon)}
  .mobile-bar a{padding:17px 10px;text-align:center;font-size:14px;font-weight:800}
  .mb-call{background:var(--accent);color:#fff}
  .mb-naver{background:#03C75A;color:#fff}
  .site-foot{padding-bottom:120px}
  .head-inner{height:60px}
}

/* ---------- 애니메이션 초기 상태 (js-anim 하위에만) ---------- */
html.js-anim .fade-up{opacity:0}
html.js-anim .mitem{opacity:0}
html.js-anim .spec{opacity:0}
html.js-anim .bn{opacity:0}
html.js-anim .combo-list li{opacity:0}
html.js-anim .store-info dl>div{opacity:0}

@media(max-width:1023px){html{scroll-behavior:smooth}}

/* ---------- 접근성 ---------- */
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}

/* ==========================================================================
   모바일·태블릿 (<=1023px)
   ★ 함정 8 — 스냅 해제, 핀 해제, Observer 미부착. 네이티브 세로 스크롤을 절대 막지 않는다.
   ★ 함정 4 — 핀 의존 요소를 CSS로 살려 둔다.
   ========================================================================== */
@media(max-width:1023px){
  html{scroll-snap-type:none !important}
  .chapter{
    scroll-snap-align:none;
    min-height:0;                    /* 100svh 강제 해제 → 내용 길이만큼 */
    padding:clamp(72px,11vw,110px) 0;
    padding-right:0;
  }
  .ch-hero{min-height:100svh}
  .board{display:none !important}
  .cursor{display:none !important}
  /* 고정 배경은 모바일 주소창·성능 문제 → 장별 배경색을 각 장에 직접 준다 */
  .stage-bgs{position:absolute;top:0;left:0;right:0;height:100svh}
  .sbg{opacity:0}
  .sbg[data-bg="0"]{opacity:1}
  .ch-stack{background:#000}
  .ch-menu{background:var(--paper)}
  .ch-combo{background:var(--carbon)}
  .ch-shake{background:var(--carbon-2)}
  .ch-store{background:#0B0B0B}
  .mega{display:none}

  /* THE STACK — 핀이 없으므로 분해도는 정적으로 벌려 두고,
     박스는 겹치지 않게 별도 블록으로 아래에 둔다 */
  .ch-stack{padding:0}
  .stack-stage{min-height:0;padding:clamp(72px,11vw,110px) 0;padding-right:0}
  .stack-progress{display:none}
  .crumbs{display:none}
  .stack-boxopen{display:none}
  /* ★ 레이어는 absolute이고 JS가 yPercent ±30으로 벌린다.
     .layers가 1/1 상자(250px)만 차지하면 벌어진 레이어가 상자 밖으로 삐져나가고
     완성 박스가 그 위에 겹쳐 찍힌다(실측 버그).
     .layers를 flex 컬럼으로 바꿔 "분해도 자리(빈 상자) → 완성 박스" 순으로 흘린다. */
  .layers{aspect-ratio:auto;width:min(320px,64vw);
    display:flex;flex-direction:column;align-items:stretch}
  /* 분해도가 차지할 자리를 빈 공간으로 확보 (레이어는 absolute라 자리를 안 만든다) */
  .layers::before{content:"";display:block;height:min(400px,80vw);flex:none}
  /* 레이어는 그 빈 자리 안에만 머문다 — 아래 박스를 침범하면 안 된다 */
  .layer{height:min(400px,80vw)}
  /* 완성 박스는 그 아래, 별도 블록으로 온다 */
  .stack-box{position:relative;left:auto;top:auto;transform:none;width:100%;
    opacity:1;margin-top:24px;border-radius:3px;display:block;flex:none;
    -webkit-mask-image:none;mask-image:none}
  .stack-outro{position:relative;inset:auto;opacity:1;margin-top:26px;
    padding-top:22px;border-top:1px solid var(--line)}
  .stack-side{min-height:0;display:block}
  .shake-fig img{max-height:none}
  .site-foot{margin-top:clamp(28px,6vw,50px)}
  .ch-store{padding-bottom:0}
}

/* ==========================================================================
   reduced-motion — 스냅·핀·커서 전부 해제, 전 장면을 정적으로 표시
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important}
  html{scroll-snap-type:none !important;scroll-behavior:auto}
  .chapter{scroll-snap-align:none;min-height:0;display:block;
    padding:clamp(60px,8vw,100px) 0;padding-right:0}
  .ch-hero{min-height:100svh;display:flex}
  .board{display:none !important}
  .cursor{display:none !important}
  .mega{display:none}
  .stage-bgs{position:absolute;height:100svh}
  .sbg{opacity:0}
  .sbg[data-bg="0"]{opacity:1}
  .ch-stack{background:#000;padding:0}
  .ch-menu{background:var(--paper)}
  .ch-combo{background:var(--carbon)}
  .ch-shake{background:var(--carbon-2)}
  .ch-store{background:#0B0B0B}
  html.js-anim .fade-up,html.js-anim .mitem,html.js-anim .spec,
  html.js-anim .bn,html.js-anim .combo-list li,html.js-anim .store-info dl>div{opacity:1 !important}
  .curtain{display:none}
  .scroll-tag i::after{animation:none}
  .stack-stage{min-height:0;padding:clamp(60px,8vw,100px) 0;padding-right:0}
  .stack-progress{display:none}
  .crumbs{display:none}
  /* 분해도를 정적으로 벌려서 보여준다 */
  .layers{aspect-ratio:auto;height:auto;display:grid;gap:10px;width:min(320px,80vw)}
  .layer{position:relative;height:auto}
  .stack-boxopen{display:none}
  .stack-box{position:relative;left:auto;top:auto;transform:none;width:100%;opacity:1;margin-top:20px;
    -webkit-mask-image:none;mask-image:none}
  .stack-outro{position:relative;inset:auto;opacity:1;margin-top:24px}
  .stack-side{min-height:0;display:block}
  .shake-fig img{max-height:none}
}