/* ===================================================================
   DeckFlip — "고민말고 DeckFlip 하세요"
   Light Editorial × Modern Product · Paper + Ink + Signal Orange
   =================================================================== */

:root{
  --paper:#FBFAF6;
  --paper2:#F3F0E8;
  --paper3:#EAE6DB;
  --card:#FFFFFF;
  --ink:#14161A;
  --ink-soft:#2C3038;
  --sub:#565B63;
  --muted:#8D9099;
  --line:#E5E1D7;
  --line2:#D3CDBE;
  --accent:#DD5B2B;
  --accent-deep:#B8431A;
  --accent-wash:#FBEAE1;
  --teal:#1F6F5C;
  --teal-wash:#E4EFEB;
  --navy:#20293A;

  --fs-hero:clamp(56px,7.2vw,138px);
  --fs-div:clamp(42px,5vw,84px);
  --fs-title:clamp(30px,3.4vw,58px);
  --fs-lead:clamp(17px,1.55vw,25px);
  --fs-body:clamp(15px,1.12vw,19px);
  --fs-small:clamp(14px,0.92vw,15px);
  --fs-micro:clamp(14px,0.8vw,13px);

  --pad-y:clamp(46px,4.6vw,88px);
  --pad-x:clamp(26px,6.4vw,124px);

  --ease:cubic-bezier(.22,1,.36,1);
  --font:'Pretendard','Pretendard Variable',-apple-system,'Helvetica Neue',sans-serif;
  --serif:'Noto Serif KR',Georgia,serif;
  --mono:'Space Grotesk','Pretendard',sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}

html,body{
  width:100%;height:100%;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font);
  font-weight:400;
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
  letter-spacing:-0.014em;
  word-break:keep-all;
  overflow-wrap:break-word;
  font-variant-numeric:tabular-nums;
}

/* ---------- 3D background (behind everything, non-interactive) ---------- */
#three-canvas-container{
  position:fixed;inset:0;z-index:0;pointer-events:none;
}
#three-canvas{width:100%;height:100%;display:block}

/* ---------- stage ---------- */
.presentation{
  position:relative;z-index:1;
  width:100vw;height:100vh;
  overflow-y:auto;
  scroll-snap-type:y mandatory;
  scroll-behavior:smooth;
  scrollbar-width:none;
}
.presentation::-webkit-scrollbar{display:none}

.slide{
  position:relative;
  width:100vw;height:100vh;
  scroll-snap-align:start;
  scroll-snap-stop:always;
  padding:var(--pad-y) var(--pad-x);
  display:flex;flex-direction:column;justify-content:center;
  background:var(--paper);
  overflow:hidden;
}
/* slides that let the 3D scene through */
.slide-cover,.slide-divider,.slide-close,.slide-clear{background:transparent}
.slide-tinted{background:var(--paper2)}
/* 3D 씬 위에 얹는 반투명 패널 (씬이 보이는 슬라이드에서만) */
.card-glass{
  background:rgba(255,253,248,.74);
  border:1px solid rgba(255,255,255,.9);
  border-radius:16px;
  backdrop-filter:blur(14px) saturate(118%);
  -webkit-backdrop-filter:blur(14px) saturate(118%);
  box-shadow:0 14px 40px rgba(20,22,26,.09);
  padding:clamp(20px,2vw,34px);
}

/* ---------- header / footer ---------- */
.slide-header{
  position:absolute;top:clamp(26px,3vw,54px);left:var(--pad-x);right:var(--pad-x);
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  font-size:var(--fs-micro);color:var(--muted);
  letter-spacing:.16em;font-weight:600;
  padding-bottom:14px;border-bottom:1px solid var(--line);
}
.slide-header .hdr-label{color:var(--sub)}
.slide-header .hdr-mark{color:var(--accent);letter-spacing:.24em}

.slide-footer{
  position:absolute;bottom:clamp(22px,2.6vw,46px);left:var(--pad-x);right:var(--pad-x);
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  font-size:var(--fs-micro);color:var(--muted);
  letter-spacing:.12em;padding-top:12px;border-top:1px solid var(--line);
}
.slide-footer .page-num{color:var(--sub);font-weight:600;font-family:var(--mono)}
.slide-footer .foot-note{text-align:right}

.accent-line{width:38px;height:2px;background:var(--accent);margin-bottom:22px}
.eyebrow{
  font-family:var(--mono);
  font-size:clamp(14px,.9vw,13px);letter-spacing:.42em;text-transform:uppercase;
  color:var(--accent);font-weight:600;
}

.slide-title{
  font-size:var(--fs-title);font-weight:800;line-height:1.14;letter-spacing:-.035em;
  color:var(--ink);
}
.slide-title em{font-style:normal;color:var(--accent)}
.slide-lead{
  margin-top:14px;font-size:var(--fs-lead);color:var(--sub);
  line-height:1.55;font-weight:400;max-width:1080px;
}
.body-wrap{margin-top:clamp(22px,2.6vw,44px)}

/* ---------- reveal ---------- */
.slide .anim{
  opacity:0;transform:translateY(22px);
  transition:opacity .9s var(--ease),transform .9s var(--ease);
}
.slide.in-view .anim{opacity:1;transform:none}
.slide.in-view .anim-1{transition-delay:.10s}
.slide.in-view .anim-2{transition-delay:.20s}
.slide.in-view .anim-3{transition-delay:.30s}
.slide.in-view .anim-4{transition-delay:.40s}
.slide.in-view .anim-5{transition-delay:.50s}
.slide.in-view .anim-6{transition-delay:.60s}
.slide.in-view .anim-7{transition-delay:.70s}
.slide.in-view .anim-8{transition-delay:.80s}
.slide.in-view .anim-9{transition-delay:.90s}

/* ---------- deck chrome ---------- */
.aura-follower{
  position:fixed;top:0;left:0;width:200px;height:200px;border-radius:50%;
  background:radial-gradient(circle,rgba(221,91,43,.22) 0%,rgba(221,91,43,0) 68%);
  mix-blend-mode:multiply;pointer-events:none;z-index:60;
  transform:translate(-50%,-50%);transition:opacity .4s ease;opacity:0;
}
.progress-bar{
  position:fixed;top:0;left:0;right:0;height:3px;background:rgba(20,22,26,.07);z-index:70;
}
.progress-bar .progress{height:100%;width:0;background:var(--accent);transition:width .5s var(--ease)}
.slide-indicator{
  position:fixed;right:clamp(14px,2vw,34px);bottom:clamp(14px,2vw,30px);z-index:70;
  font-family:var(--mono);font-size:13px;letter-spacing:.16em;color:var(--muted);
  background:rgba(251,250,246,.86);border:1px solid var(--line);
  padding:7px 12px;border-radius:999px;
}
.slide-indicator .current{color:var(--accent);font-weight:700}

/* ===================================================================
   STANDARD CAPABILITY UNITS (드라이버는 앱이 주입 — 여기는 표시만)
   =================================================================== */
.sw{display:flex;flex-direction:column;gap:clamp(16px,1.8vw,26px)}
.sw-tabs{display:flex;flex-wrap:wrap;gap:10px}
.sw-tab{
  font-family:var(--font);font-size:var(--fs-small);font-weight:600;letter-spacing:-.01em;
  color:var(--sub);background:var(--card);border:1px solid var(--line2);
  padding:11px 20px;border-radius:999px;cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.sw-tab:hover{border-color:var(--accent);color:var(--accent)}
.sw-tab .tab-num{font-family:var(--mono);opacity:.55;margin-right:8px}
.sw-tab.active,.sw-tab.std-on,.sw-tab[data-active],.sw-tab[aria-selected="true"]{
  background:var(--ink);color:#fff;border-color:var(--ink);box-shadow:0 6px 18px rgba(20,22,26,.16);
}
.sw-tab.active .tab-num,.sw-tab.std-on .tab-num,.sw-tab[data-active] .tab-num{color:var(--accent);opacity:1}
/* no-driver floor: nothing marked active ⇒ the default tab reads as active */
.sw-tabs:not(:has(> .sw-tab.active)):not(:has(> .sw-tab.std-on)):not(:has(> .sw-tab[data-active])) .sw-tab[data-default]{
  background:var(--ink);color:#fff;border-color:var(--ink);
}
.sw-tabs:not(:has(> .sw-tab.active)):not(:has(> .sw-tab.std-on)):not(:has(> .sw-tab[data-active])) .sw-tab[data-default] .tab-num{
  color:var(--accent);opacity:1;
}

.sw-panels{position:relative}
.sw-panel{display:none}
.sw-panel.active,.sw-panel.std-on,.sw-panel[data-active],.sw-panel[data-state-active]{
  display:block;animation:swIn .34s var(--ease) both;
}
.sw-panels:not(:has(> .sw-panel.active)):not(:has(> .sw-panel.std-on)):not(:has(> .sw-panel[data-active])) .sw-panel[data-default]{
  display:block;
}
@keyframes swIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

.sw-hint{
  display:inline-flex;align-items:center;gap:9px;
  font-size:var(--fs-micro);color:var(--muted);letter-spacing:.02em;
}
.sw-hint::before{
  content:'';width:9px;height:9px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 0 rgba(221,91,43,.5);animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(221,91,43,.45)}
  70%{box-shadow:0 0 0 12px rgba(221,91,43,0)}
  100%{box-shadow:0 0 0 0 rgba(221,91,43,0)}
}

/* ===================================================================
   1 · COVER
   =================================================================== */
.slide-cover{align-items:flex-start;justify-content:center}
.cover-inner{max-width:1280px}
.cover-mark{
  display:flex;align-items:center;gap:14px;margin-bottom:clamp(26px,3vw,48px);
}
.cover-mark .glyph{
  width:44px;height:44px;border-radius:11px;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:20px;
  box-shadow:0 10px 26px rgba(20,22,26,.2);
}
.cover-mark .word{font-family:var(--mono);font-size:19px;letter-spacing:.3em;font-weight:600;color:var(--ink)}
.cover-title{
  font-size:var(--fs-hero);font-weight:900;line-height:.94;letter-spacing:-.055em;color:var(--ink);
}
.cover-title .flip{
  color:var(--accent);display:inline-block;
}
.cover-sub{
  margin-top:clamp(20px,2.2vw,34px);font-size:clamp(18px,1.8vw,30px);
  color:var(--sub);line-height:1.5;font-weight:400;max-width:820px;
}
.cover-rule{width:120px;height:2px;background:var(--accent);margin:clamp(28px,3vw,48px) 0}
.cover-meta{display:flex;flex-wrap:wrap;gap:clamp(28px,4vw,72px)}
.cover-meta .blk .label{
  font-family:var(--mono);font-size:14px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--muted);margin-bottom:9px;font-weight:600;
}
.cover-meta .blk .value{font-size:var(--fs-small);color:var(--ink);font-weight:600}
.cover-eyebrow{margin-bottom:18px}
.cover-cta{
  margin-top:clamp(26px,3vw,44px);display:inline-flex;align-items:center;gap:12px;
  background:var(--accent);color:#fff;border:none;cursor:pointer;
  font-family:var(--font);font-size:var(--fs-small);font-weight:700;letter-spacing:.01em;
  padding:15px 26px;border-radius:999px;
  box-shadow:0 12px 30px rgba(221,91,43,.28);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);
}
.cover-cta:hover{transform:translateY(-2px);background:var(--accent-deep);box-shadow:0 16px 38px rgba(221,91,43,.34)}
.cover-cta .arrow{font-family:var(--mono)}

/* ===================================================================
   2 · TOC
   =================================================================== */
.toc-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;flex-wrap:wrap}
.toc-title{font-size:clamp(34px,4vw,68px);font-weight:900;letter-spacing:-.045em;line-height:1.05}
.toc-note{font-size:var(--fs-small);color:var(--muted);max-width:340px;line-height:1.6}
.toc-grid{
  margin-top:clamp(24px,3vw,48px);
  display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(12px,1.2vw,20px);
}
.toc-tile{
  display:block;width:100%;text-align:left;cursor:pointer;
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:clamp(18px,1.8vw,28px);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
  font-family:var(--font);
}
.toc-tile:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 14px 34px rgba(20,22,26,.09)}
.toc-tile .num{
  font-family:var(--mono);font-size:clamp(28px,2.6vw,40px);font-weight:700;color:var(--accent);
  line-height:1;letter-spacing:-.03em;
}
.toc-tile .ko{margin-top:12px;font-size:clamp(17px,1.4vw,22px);font-weight:800;color:var(--ink);letter-spacing:-.03em}
.toc-tile .desc{margin-top:8px;font-size:var(--fs-small);color:var(--sub);line-height:1.55}
.toc-tile .pages{margin-top:14px;font-family:var(--mono);font-size:13px;color:var(--muted);letter-spacing:.1em}

/* ===================================================================
   3 · DIVIDER
   =================================================================== */
.slide-divider{justify-content:center}
.div-bgnum{
  position:absolute;right:calc(var(--pad-x) - 10px);top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:clamp(220px,40vw,480px);font-weight:700;
  color:rgba(221,91,43,.075);line-height:.78;letter-spacing:-.06em;user-select:none;pointer-events:none;
}
.div-inner{position:relative;max-width:1100px}
.div-num{
  font-family:var(--mono);font-size:clamp(28px,2.6vw,44px);color:var(--accent);
  font-weight:600;margin:14px 0 18px;letter-spacing:-.02em;
}
.div-title{font-size:var(--fs-div);font-weight:900;letter-spacing:-.05em;line-height:1.06;color:var(--ink)}
.div-sub{
  margin-top:22px;font-family:var(--serif);font-size:clamp(17px,1.5vw,24px);
  color:var(--sub);line-height:1.65;max-width:760px;
}
.div-nav{display:flex;flex-wrap:wrap;gap:8px;margin-top:clamp(28px,3.2vw,52px)}
.div-nav-item{
  font-size:var(--fs-micro);letter-spacing:.06em;color:var(--muted);
  border:1px solid var(--line);border-radius:999px;padding:8px 15px;background:rgba(255,255,255,.66);
  cursor:pointer;font-family:var(--font);
  transition:color .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease);
}
.div-nav-item:hover{color:var(--accent);border-color:var(--accent)}
.div-nav-item.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.div-nav-item .n{font-family:var(--mono);margin-right:7px;opacity:.6}

/* ===================================================================
   공통 레이아웃 블록
   =================================================================== */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,2.4vw,44px);align-items:start}
.split-6040{display:grid;grid-template-columns:1.35fr 1fr;gap:clamp(20px,2.4vw,44px);align-items:start}
.split-4060{display:grid;grid-template-columns:1fr 1.4fr;gap:clamp(20px,2.4vw,44px);align-items:start}
.cols-3{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,1.4vw,24px)}
.cols-4{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(12px,1.2vw,20px)}
.cols-2{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(14px,1.5vw,26px)}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:clamp(18px,1.8vw,30px);
}
.card-tint{background:var(--paper2);border-color:var(--line2)}
.card-ink{background:var(--ink);border-color:var(--ink);color:#F4F2EC}
.card-ink .c-title{color:#fff}
.card-ink .c-desc{color:rgba(244,242,236,.74)}
.card .c-kicker{
  font-family:var(--mono);font-size:13px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin-bottom:12px;
}
.card .c-title{font-size:clamp(18px,1.5vw,24px);font-weight:800;letter-spacing:-.03em;line-height:1.3;color:var(--ink)}
.card .c-desc{margin-top:10px;font-size:var(--fs-body);color:var(--sub);line-height:1.62}

.note{font-size:var(--fs-micro);color:var(--muted);line-height:1.6;margin-top:12px}
.hl{color:var(--accent);font-weight:700}
.hl-ink{color:var(--ink);font-weight:700}
.mark{background:linear-gradient(transparent 62%,var(--accent-wash) 62%);padding:0 2px}

/* 리스트 */
.list-plain{display:flex;flex-direction:column;gap:14px}
.list-plain li{list-style:none;display:flex;gap:14px;align-items:flex-start;font-size:var(--fs-body);color:var(--sub);line-height:1.6}
.list-plain li .bullet{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--accent-wash);color:var(--accent-deep);
  font-family:var(--mono);font-size:12px;font-weight:700;display:grid;place-items:center;margin-top:2px;
}
.list-plain li b{color:var(--ink);font-weight:700}

/* 칩 */
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{
  font-size:var(--fs-micro);color:var(--sub);background:var(--card);
  border:1px solid var(--line2);border-radius:999px;padding:8px 15px;letter-spacing:-.01em;
}
.chip.on{background:var(--accent-wash);border-color:var(--accent);color:var(--accent-deep);font-weight:600}

/* 표 */
.tbl{width:100%;border-collapse:collapse;font-size:var(--fs-body)}
.tbl th,.tbl td{padding:clamp(11px,1.1vw,17px) clamp(10px,1vw,18px);text-align:left;border-bottom:1px solid var(--line)}
.tbl thead th{
  font-size:var(--fs-micro);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);
  font-weight:700;border-bottom:1px solid var(--line2);
}
.tbl tbody tr:last-child td{border-bottom:none}
.tbl td.k{color:var(--ink);font-weight:700;white-space:nowrap}
.tbl td.v{color:var(--sub);line-height:1.55}
.tbl td.good{color:var(--accent-deep);font-weight:600}
.tbl tbody tr{transition:background .25s var(--ease)}
.tbl tbody tr:hover{background:var(--paper2)}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--card)}

/* 차트 박스 */
.chart-box{position:relative;width:100%;height:clamp(230px,32vh,360px)}
.chart-cap{margin-top:12px;font-size:var(--fs-micro);color:var(--muted);line-height:1.55}

/* 목업 (슬라이드 미니어처) */
.mock{
  background:var(--card);border:1px solid var(--line2);border-radius:12px;overflow:hidden;
  aspect-ratio:16/9;display:flex;flex-direction:column;
  width:100%;max-width:600px;
  box-shadow:0 10px 28px rgba(20,22,26,.07);
}
.mock-bar{
  height:26px;background:var(--paper2);border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:5px;padding:0 10px;flex:0 0 auto;
}
.mock-bar i{width:7px;height:7px;border-radius:50%;background:var(--line2);display:block}
.mock-body{flex:1;padding:clamp(12px,1.3vw,22px);display:flex;flex-direction:column;justify-content:center;gap:9px}
.mock-line{height:9px;border-radius:3px;background:var(--paper3)}
.mock-line.t{height:16px;width:62%;background:var(--ink);opacity:.85}
.mock-line.s{width:44%;background:var(--accent);opacity:.75;height:7px}
.mock-line.w80{width:80%}
.mock-line.w66{width:66%}
.mock-line.w52{width:52%}
.mock-blocks{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:6px}
.mock-blocks span{height:34px;border-radius:5px;background:var(--paper2);border:1px solid var(--line)}
.mock-blocks span.a{background:var(--accent-wash);border-color:var(--accent-wash)}
.mock.empty .mock-body{align-items:center;justify-content:center}
.mock .empty-cursor{
  width:2px;height:30px;background:var(--ink);opacity:.6;animation:blink 1.1s steps(2) infinite;
}
@keyframes blink{0%,49%{opacity:.6}50%,100%{opacity:0}}
.mock-tag{
  font-size:var(--fs-micro);color:var(--muted);margin-top:10px;letter-spacing:.02em;text-align:center;
}

/* 흐름 */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(10px,1vw,18px);align-items:stretch}
.flow-step{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:13px;
  padding:clamp(16px,1.6vw,26px);
}
.flow-step .fn{font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.18em;font-weight:700}
.flow-step .ft{margin-top:10px;font-size:clamp(16px,1.35vw,21px);font-weight:800;letter-spacing:-.03em}
.flow-step .fd{margin-top:8px;font-size:var(--fs-small);color:var(--sub);line-height:1.55}
.flow-step::after{
  content:'→';position:absolute;right:-14px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);color:var(--line2);font-size:17px;z-index:2;
}
.flow-step:last-child::after{display:none}

/* 타임라인 */
.tl{position:relative;padding-left:26px}
.tl::before{content:'';position:absolute;left:6px;top:6px;bottom:6px;width:1px;background:var(--line2)}
.tl-item{position:relative;padding:0 0 clamp(16px,1.7vw,26px) 0}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:'';position:absolute;left:-24px;top:7px;width:11px;height:11px;border-radius:50%;
  background:var(--paper);border:2px solid var(--line2);
}
.tl-item.hot::before{border-color:var(--accent);background:var(--accent)}
.tl-time{font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.14em;font-weight:700}
.tl-title{margin-top:5px;font-size:clamp(17px,1.4vw,22px);font-weight:800;letter-spacing:-.03em}
.tl-desc{margin-top:6px;font-size:var(--fs-small);color:var(--sub);line-height:1.6}

/* 인용 */
.quote{
  background:var(--paper2);border-left:3px solid var(--accent);border-radius:0 14px 14px 0;
  padding:clamp(22px,2.2vw,38px);
}
.quote p{font-family:var(--serif);font-size:clamp(19px,1.75vw,30px);line-height:1.62;color:var(--ink);letter-spacing:-.02em}
.quote cite{display:block;margin-top:16px;font-style:normal;font-size:var(--fs-micro);color:var(--muted);letter-spacing:.06em}

/* 메가 스테이트먼트 */
.mega{max-width:1300px}
.mega-line{
  font-size:clamp(34px,4.6vw,86px);font-weight:900;line-height:1.1;letter-spacing:-.05em;color:var(--ink);
}
.mega-line .sub{display:block;font-size:clamp(17px,1.5vw,24px);font-weight:400;color:var(--sub);letter-spacing:-.02em;margin-top:24px;line-height:1.6}
.mega-num{
  font-family:var(--mono);font-size:clamp(72px,10vw,180px);font-weight:700;color:var(--accent);
  line-height:.9;letter-spacing:-.05em;
}

/* KPI/사실 카드 */
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,1.4vw,24px)}
.fact{border-top:2px solid var(--ink);padding-top:16px}
.fact .fv{font-family:var(--mono);font-size:clamp(30px,3.2vw,52px);font-weight:700;letter-spacing:-.04em;color:var(--ink);line-height:1}
.fact .fv small{font-size:.42em;color:var(--sub);margin-left:6px;font-weight:600}
.fact .fl{margin-top:10px;font-size:var(--fs-small);color:var(--sub);line-height:1.55}
.fact.accent{border-top-color:var(--accent)}
.fact.accent .fv{color:var(--accent)}

/* 체크리스트 */
.checklist{display:flex;flex-direction:column;gap:11px}
.check{
  display:flex;gap:14px;align-items:flex-start;background:var(--card);
  border:1px solid var(--line);border-radius:11px;padding:14px 18px;
}
.check .box{
  flex:0 0 auto;width:20px;height:20px;border-radius:6px;border:1.5px solid var(--accent);
  display:grid;place-items:center;color:var(--accent);font-size:12px;font-weight:700;margin-top:1px;
}
.check .ct{font-size:var(--fs-body);color:var(--ink);font-weight:700}
.check .cd{font-size:var(--fs-small);color:var(--sub);margin-top:4px;line-height:1.55}

/* 대화 버블 */
.chat{display:flex;flex-direction:column;gap:12px}
.bubble{max-width:86%;padding:14px 18px;border-radius:14px;font-size:var(--fs-body);line-height:1.6}
.bubble.me{align-self:flex-end;background:var(--ink);color:#F6F4EE;border-bottom-right-radius:4px}
.bubble.app{align-self:flex-start;background:var(--card);border:1px solid var(--line);color:var(--sub);border-bottom-left-radius:4px}
.bubble.app b{color:var(--ink)}

/* 키캡 */
.keycaps{display:flex;flex-wrap:wrap;gap:10px}
.key{
  font-family:var(--mono);font-size:var(--fs-small);font-weight:600;color:var(--ink);
  background:var(--card);border:1px solid var(--line2);border-bottom-width:3px;border-radius:8px;
  padding:9px 14px;min-width:44px;text-align:center;
}
.key .kd{display:block;font-family:var(--font);font-size:12px;color:var(--muted);margin-top:3px;font-weight:400}

/* 폰 목업 */
.phone{
  width:min(230px,100%);margin:0 auto;aspect-ratio:9/19;
  border:8px solid var(--ink);border-radius:30px;background:var(--card);
  padding:12px 10px;display:flex;flex-direction:column;gap:8px;overflow:hidden;
  box-shadow:0 18px 40px rgba(20,22,26,.16);
}
.phone .p-line{height:8px;border-radius:3px;background:var(--paper3)}
.phone .p-line.t{height:14px;width:76%;background:var(--ink);opacity:.85}
.phone .p-line.a{background:var(--accent);opacity:.7;width:40%}
.phone .p-block{height:60px;border-radius:7px;background:var(--paper2);border:1px solid var(--line)}

/* 종이 목업 */
.sheet{
  background:#fff;border:1px solid var(--line2);border-radius:4px;
  aspect-ratio:16/9;padding:16px;display:flex;flex-direction:column;gap:7px;
  width:100%;max-width:520px;
  box-shadow:4px 6px 0 rgba(20,22,26,.05),0 10px 26px rgba(20,22,26,.07);
}
.sheet .s-line{height:7px;border-radius:2px;background:var(--paper3)}
.sheet .s-line.t{height:13px;width:58%;background:var(--ink);opacity:.8}
.sheet .s-line.a{background:var(--accent);opacity:.7;width:30%;height:5px}

/* SVG 다이어그램 */
.diagram{width:100%;height:auto;display:block}
.diagram .d-box{fill:#fff;stroke:#E5E1D7}
.diagram .d-box-tint{fill:#F3F0E8;stroke:#D3CDBE}
.diagram .d-box-ink{fill:#14161A;stroke:#14161A}
.diagram .d-accent{fill:#FBEAE1;stroke:#DD5B2B}
.diagram .d-t{fill:#14161A;font-family:'Pretendard',sans-serif;font-weight:700}
.diagram .d-t-sub{fill:#565B63;font-family:'Pretendard',sans-serif;font-weight:400}
.diagram .d-t-on{fill:#FFFFFF;font-family:'Pretendard',sans-serif;font-weight:700}
.diagram .d-t-acc{fill:#B8431A;font-family:'Pretendard',sans-serif;font-weight:700}
.diagram .d-arrow{stroke:#D3CDBE;stroke-width:1.5;fill:none}
.diagram .d-dash{stroke:#DD5B2B;stroke-width:1.5;fill:none;stroke-dasharray:5 5}

/* 팔레트 미리보기 */
.pal{display:flex;gap:10px;margin-bottom:16px}
.pal span{width:46px;height:46px;border-radius:10px;border:1px solid rgba(20,22,26,.08)}
.pal-demo{border-radius:12px;padding:clamp(18px,1.8vw,28px);border:1px solid var(--line)}
.pal-demo .pd-t{font-size:clamp(20px,1.8vw,28px);font-weight:900;letter-spacing:-.035em}
.pal-demo .pd-d{margin-top:8px;font-size:var(--fs-small);line-height:1.6}

/* 스텝(누적 공개) */
.steps{display:flex;flex-direction:column;gap:12px}
.step-row{
  display:grid;grid-template-columns:54px 1fr;gap:18px;align-items:start;
  background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;
}
.step-row .sn{
  font-family:var(--mono);font-size:20px;font-weight:700;color:#fff;background:var(--ink);
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
}
.step-row.on{border-color:var(--accent);background:var(--accent-wash)}
.step-row.on .sn{background:var(--accent)}
.step-row .st{font-size:clamp(16px,1.35vw,21px);font-weight:800;letter-spacing:-.03em}
.step-row .sd{margin-top:5px;font-size:var(--fs-small);color:var(--sub);line-height:1.55}
.step-row.ghost{opacity:.4}

/* Q&A */
.qna{display:flex;flex-direction:column;gap:14px}
.qa{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:clamp(16px,1.6vw,24px)}
.qa .q{font-size:clamp(16px,1.35vw,21px);font-weight:800;letter-spacing:-.03em;color:var(--ink);display:flex;gap:11px}
.qa .q .m{color:var(--accent);font-family:var(--mono)}
.qa .a{margin-top:10px;font-size:var(--fs-body);color:var(--sub);line-height:1.65;padding-left:26px}

/* 3D 컨트롤 */
.scene-ctl{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.scene-btn{
  font-family:var(--font);font-size:var(--fs-small);font-weight:600;color:var(--ink);
  background:var(--card);border:1px solid var(--line2);border-radius:999px;padding:11px 20px;cursor:pointer;
  transition:all .25s var(--ease);
}
.scene-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.scene-btn:active{transform:translateY(0)}

/* 참고문헌 */
.refs{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(12px,1.2vw,20px)}
.ref{border-top:1px solid var(--line2);padding-top:14px}
.ref .rn{font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.16em;font-weight:700}
.ref .rt{margin-top:7px;font-size:var(--fs-small);color:var(--ink);font-weight:700;line-height:1.45}
.ref .rd{margin-top:5px;font-size:var(--fs-micro);color:var(--sub);line-height:1.55}

/* 마무리 */
.slide-close{align-items:center;justify-content:center;text-align:center}
.close-inner{max-width:1000px}
.close-title{font-size:clamp(40px,5.6vw,104px);font-weight:900;letter-spacing:-.055em;line-height:1.02;color:var(--ink)}
.close-title em{font-style:normal;color:var(--accent)}
.close-sub{margin-top:26px;font-size:clamp(17px,1.6vw,25px);color:var(--sub);line-height:1.6}
.close-rule{width:90px;height:2px;background:var(--accent);margin:34px auto}
.close-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:8px}
.close-meta{margin-top:34px;font-family:var(--mono);font-size:13px;letter-spacing:.28em;color:var(--muted);text-transform:uppercase}

/* ===================================================================
   MOBILE (≤820px) — 데스크톱 레이아웃은 그대로, 좁은 화면만 세로 리플로우
   =================================================================== */
@media (max-width:820px){
  :root{
    --pad-y:80px;--pad-x:20px;
    --fs-hero:clamp(40px,12vw,64px);
    --fs-div:clamp(32px,9.5vw,48px);
    --fs-title:clamp(24px,6.6vw,34px);
    --fs-lead:clamp(16px,4.2vw,19px);
    --fs-body:clamp(15px,4vw,17px);
    --fs-small:14px;
    --fs-micro:14px;
  }
  .presentation{scroll-snap-type:y proximity}
  .slide{height:auto;min-height:100vh;padding:76px 20px 74px}
  .slide-header,.slide-footer{position:static;left:auto;right:auto}
  .slide-header{margin-bottom:20px;font-size:13px;letter-spacing:.1em}
  .slide-footer{margin-top:26px;font-size:13px}
  .slide-footer .foot-note{text-align:right;max-width:60%}
  .body-wrap{margin-top:20px}

  /* 다단 → 단일열 */
  .split,.split-6040,.split-4060,.cols-2,.cols-3,.cols-4,
  .flow,.facts,.refs,.toc-grid,.mock-blocks{
    grid-template-columns:1fr;gap:14px;
  }
  .flow-step::after{
    content:'↓';right:auto;left:50%;top:auto;bottom:-15px;transform:translateX(-50%);
  }
  .cover-meta{gap:20px}
  .div-bgnum{font-size:44vw;right:-6px;opacity:.8}
  .mega-line{font-size:clamp(28px,8.6vw,42px)}
  .mega-num{font-size:clamp(58px,20vw,96px)}
  .chart-box{height:250px}
  .sw-tabs{gap:8px}
  .sw-tab{padding:10px 15px}
  .step-row{grid-template-columns:40px 1fr;gap:12px;padding:13px 15px}
  .step-row .sn{width:32px;height:32px;font-size:16px}
  .tl{padding-left:20px}
  .phone{width:min(200px,72vw)}
  .quote p{font-size:19px}
  .close-title{font-size:clamp(30px,9vw,44px)}
  .slide-indicator{display:none}
  .tbl th,.tbl td{padding:10px 8px;font-size:14px}
}

/* 아주 낮은 가로 화면: 높이 고정 해제 */
@media (max-height:520px) and (orientation:landscape){
  .slide{height:auto;min-height:100vh;padding:56px var(--pad-x)}
  .presentation{scroll-snap-type:y proximity}
}

/* 모션 최소화 */
@media (prefers-reduced-motion:reduce){
  .slide .anim{opacity:1;transform:none;transition:none}
  .sw-panel.active,.sw-panel.std-on{animation:none}
  .sw-hint::before{animation:none}
}

/* ===================================================================
   PRINT / EXPORT
   =================================================================== */
@media print{
  @page{size:1920px 1080px;margin:0}
  html,body{width:1920px;height:auto;overflow:visible;background:#FBFAF6}
  .presentation{width:1920px;height:auto;overflow:visible;scroll-snap-type:none}
  .slide{
    width:1920px!important;height:1080px!important;
    overflow:hidden;page-break-after:always;break-after:page;
    padding:88px 124px;
  }
  .slide .anim{opacity:1!important;transform:none!important;transition:none!important}
  .sw-panel.active,.sw-panel.std-on,.sw-panel[data-active]{animation:none!important}
  .aura-follower,.progress-bar,.slide-indicator,#three-canvas-container{display:none!important}
  *{print-color-adjust:exact!important;-webkit-print-color-adjust:exact!important}
}