:root {
  --bg: #e9e6e0;
  --panel: rgba(250, 249, 247, 0.96);
  --ink: #141414;
  --muted: #76716a;
  --line: rgba(20, 20, 20, 0.14);
  --accent: #ef7f1d;
  --page-ratio: 0.70695667;
  --safe-bottom: max(18px, env(safe-area-inset-bottom));
}

* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; }
body {
  overflow: hidden;
  color: var(--ink);
  background: var(--bg);
  font-family: Inter, Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; color: inherit; }

.app { width: 100%; height: 100dvh; min-height: 100%; position: relative; overflow: hidden; }


/* 전체화면에서도 기존의 밝은 이북 배경을 그대로 유지합니다. */
.app:fullscreen,
.app:-webkit-full-screen {
  background: var(--bg);
}
.app:fullscreen::backdrop { background: var(--bg); }
.app:-webkit-full-screen { background: var(--bg); }

.topbar {
  position: absolute;
  z-index: 80;
  left: 28px;
  right: 28px;
  top: max(18px, env(safe-area-inset-top));
  height: 54px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
  pointer-events: none;
}
.topbar__brand { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.topbar__eyebrow { color: var(--muted); font-size: 9px; font-weight: 700; letter-spacing: .19em; }
.topbar__brand strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 12px; letter-spacing: .055em; font-weight: 700; }
.topbar__status { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 10px; font-weight: 700; letter-spacing: .12em; }
.topbar__status b { color: var(--ink); font-weight: 800; }
.topbar__divider { display: inline-block; width: 1px; height: 12px; background: var(--line); }
.topbar__right { display: flex; justify-content: flex-end; align-items: center; min-width: 0; }
.brand-logo { display: block; max-width: 116px; max-height: 30px; object-fit: contain; }

.reader {
  position: absolute;
  inset: 78px 0 84px;
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr) 70px;
  align-items: center;
}
.edge-nav--prev { grid-column: 1; }
.book-stage { grid-column: 2; }
.edge-nav--next { grid-column: 3; }
.book-stage {
  position: relative;
  width: 100%; height: 100%; min-width: 0;
  display: grid; place-items: center;
  perspective: 1800px;
  overflow: hidden;
  cursor: default;
  touch-action: pan-y;
}
.book-sizing {
  --zoom-scale: 1;
  --pan-x: 0px;
  --pan-y: 0px;
  --cover-shift-x: 0px;
  position: relative;
  display: grid;
  place-items: center;
  transform: translate3d(calc(var(--pan-x) + var(--cover-shift-x)), var(--pan-y), 0) scale(var(--zoom-scale));
  transform-origin: 50% 50%;
  transition: transform .24s cubic-bezier(.2,.72,.24,1), opacity .12s ease;
  will-change: auto;
}
.book-sizing.no-zoom-transition { transition: none !important; }
.book-sizing.no-cover-transition { transition: none !important; }
.flip-book { width: 100%; height: 100%; position: relative; overflow: visible; }

.cover-hit-area {
  position: absolute;
  z-index: 70;
  display: none;
  border: 0;
  padding: 0;
  margin: 0;
  background: transparent;
  cursor: pointer;
  touch-action: manipulation;
}
.cover-hit-area.is-visible { display: block; }

.page {
  position: relative;
  overflow: hidden;
  background: #fff;
  border: 0;
  box-shadow: none;
  user-select: none;
  -webkit-user-select: none;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.page__image { width: 100%; height: 100%; display: block; object-fit: fill; image-rendering: auto; -webkit-user-drag: none; }
.page--cover { cursor: pointer; }
.page--cover .page__image { background: var(--accent); }
.page--blank { background: var(--accent); }
.page--multimedia { background: var(--accent); }
.page--end { background: var(--accent); }
.page--site { background: var(--accent); }
.page--cta { background: var(--accent); }

.page2-placeholder {
  position: absolute;
  inset: 0;
  background: var(--accent);
}

/* Native video is intentionally rendered outside STPageFlip's 3D-transformed page DOM.
   This keeps Chrome/Edge/Safari controls fully clickable and prevents flip-state pauses. */
.video-portal {
  position: absolute;
  z-index: 60;
  display: block;
  padding: 0;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity .12s ease;
}
.video-portal.is-visible {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

.page2-video {
  position: absolute;
  left: 15%;
  top: 5.5%;
  width: 70.02%;
  height: 88%;
  object-fit: cover;
  background: var(--accent);
  border: 1px solid rgba(255,255,255,.24);
  box-shadow: 0 16px 42px rgba(40,22,7,.20);
  pointer-events: auto;
}
.page2-caption {
  position: absolute;
  left: 10%;
  right: 10%;
  bottom: 1.5%;
  color: rgba(255,255,255,.92);
  text-align: center;
  pointer-events: none;
}
.page2-caption strong { font-size: clamp(9px, .9vw, 13px); letter-spacing: .18em; font-weight: 700; }

.video-center-play {
  position: absolute;
  z-index: 6;
  left: 50%;
  top: 49.5%;
  width: 66px;
  height: 66px;
  padding: 0;
  border: 1px solid rgba(255,255,255,.66);
  border-radius: 50%;
  background: rgba(10,10,10,.54);
  box-shadow: 0 12px 30px rgba(0,0,0,.24), inset 0 0 0 1px rgba(255,255,255,.10);
  backdrop-filter: blur(8px);
  transform: translate(-50%, -50%) scale(.92);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: opacity .18s ease, transform .18s ease, background .18s ease;
}
.video-center-play.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}
.video-center-play:hover { background: rgba(10,10,10,.68); transform: translate(-50%, -50%) scale(1.045); }
.video-center-play span {
  display: block;
  width: 0;
  height: 0;
  margin-left: 4px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 16px solid #fff;
}

.video-page-nav {
  position: absolute;
  z-index: 5;
  top: 0;
  bottom: 0;
  width: 14%;
  padding: 0;
  border: 0;
  background: transparent;
  color: rgba(255,255,255,.5);
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: color .16s ease, background .16s ease;
}
.video-page-nav--prev { left: 0; justify-content: flex-start; padding-left: 3.5%; }
.video-page-nav--next { right: 0; justify-content: flex-end; padding-right: 3.5%; }
.video-page-nav span { font: 300 34px/1 Georgia, serif; opacity: .46; transition: opacity .16s ease, transform .16s ease; }
.video-page-nav:hover { color: #fff; background: rgba(255,255,255,.035); }
.video-page-nav:hover span { opacity: .9; }
.video-page-nav--prev:hover span { transform: translateX(-2px); }
.video-page-nav--next:hover span { transform: translateX(2px); }

.cta-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 20px;
  text-align: center;
  color: #fff;
  padding: 11%;
}
.cta-kicker { font-size: clamp(7px, .7vw, 11px); font-weight: 700; letter-spacing: .23em; opacity: .82; }
.cta-title { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(24px, 3.1vw, 48px); font-weight: 500; letter-spacing: .06em; line-height: 1.05; }
.cta-rule { width: 44px; height: 1px; background: rgba(255,255,255,.72); }
.cta-copy { margin: 0; font-size: clamp(10px, 1vw, 14px); line-height: 1.7; opacity: .86; }
.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 172px;
  height: 48px;
  padding: 0 22px;
  color: #111;
  background: #fff;
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 2px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .04em;
  text-decoration: none;
  box-shadow: 0 12px 28px rgba(88,40,0,.14);
  transition: transform .18s ease, box-shadow .18s ease;
}
.cta-button:hover { transform: translateY(-2px); box-shadow: 0 17px 34px rgba(88,40,0,.19); }

.site-page-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10%;
}
.site-link-button {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  width: 58%;
  min-height: 92px;
  padding: 18px 28px;
  color: var(--accent);
  background: #fff;
  border: 1px solid rgba(255,255,255,.95);
  border-radius: 999px;
  text-decoration: none;
  text-align: center;
  box-shadow: 0 15px 34px rgba(88,40,0,.14);
  transition: transform .18s ease, box-shadow .18s ease;
}
.site-link-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(88,40,0,.20);
}
.site-link-button span {
  font-size: clamp(15px, 1.35vw, 20px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: .04em;
}
.site-link-button small {
  color: #6f6256;
  font-size: clamp(9px, .82vw, 12px);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: .03em;
}

.edge-nav {
  width: 44px; height: 64px;
  justify-self: center;
  border: 1px solid rgba(20,20,20,.13);
  border-radius: 2px;
  background: rgba(250,249,247,.74);
  color: #1a1a1a;
  display: grid; place-items: center;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: background .18s ease, transform .18s ease, opacity .18s ease;
}
.edge-nav span { font: 300 35px/1 Georgia, serif; transform: translateY(-1px); }
.edge-nav:hover:not(:disabled) { background: #fff; transform: translateY(-1px); }
.edge-nav:disabled { opacity: .2; cursor: default; }

.dock-wrap {
  position: absolute;
  z-index: 85;
  left: 50%; bottom: var(--safe-bottom);
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.progress-track { width: 330px; max-width: 70vw; height: 1px; background: rgba(20,20,20,.13); overflow: hidden; }
.progress-track span { display: block; width: 0; height: 100%; background: var(--ink); transition: width .25s ease; }
.dock {
  height: 48px;
  display: flex;
  align-items: center;
  padding: 0 6px;
  background: rgba(20,20,20,.96);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 3px;
  box-shadow: 0 12px 34px rgba(0,0,0,.18);
}
.dock__btn {
  border: 0; background: transparent; color: #fff; cursor: pointer;
  height: 38px; display: inline-flex; align-items: center; justify-content: center;
}
.dock__btn { width: 40px; }
.dock__btn svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: square; stroke-linejoin: miter; }
.dock__btn:hover:not(:disabled) { background: rgba(255,255,255,.08); }
.dock__btn:disabled { opacity: .28; cursor: default; }
.dock__jump {
  height: 38px; min-width: 90px; display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  color: #fff; font-size: 10px; font-weight: 700; letter-spacing: .08em;
}
.dock__jump-input {
  width: 34px; height: 28px; margin: 0; padding: 0 3px; border: 1px solid rgba(255,255,255,.17);
  border-radius: 2px; outline: none; background: rgba(255,255,255,.06); color: #fff;
  text-align: center; font: 800 10px/1 Inter, Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  appearance: textfield; -moz-appearance: textfield;
}
.dock__jump-input::-webkit-outer-spin-button, .dock__jump-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.dock__jump-input:focus { border-color: rgba(255,255,255,.55); background: rgba(255,255,255,.12); }
.dock__jump i { width: 18px; height: 1px; background: rgba(255,255,255,.32); }
.dock__separator { width: 1px; height: 18px; margin: 0 4px; background: rgba(255,255,255,.16); }
.audio-btn .audio-icon--off { display: none; }
.audio-btn.is-muted .audio-icon--on { display: none; }
.audio-btn.is-muted .audio-icon--off { display: block; }
.audio-btn.is-unavailable { opacity: .28; }

.thumb-panel {
  position: absolute;
  z-index: 120;
  right: 0; top: 0; bottom: 0;
  width: min(390px, 88vw);
  background: var(--panel);
  border-left: 1px solid var(--line);
  box-shadow: -20px 0 50px rgba(0,0,0,.12);
  transform: translateX(103%);
  transition: transform .28s cubic-bezier(.22,.61,.36,1);
  display: flex; flex-direction: column;
  backdrop-filter: blur(18px);
}
.thumb-panel.is-open { transform: translateX(0); }
.thumb-panel__head { height: 86px; flex: 0 0 86px; padding: 22px 20px 18px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; }
.thumb-panel__head div { display: flex; flex-direction: column; gap: 4px; }
.thumb-panel__head span { color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .18em; }
.thumb-panel__head strong { font-size: 14px; }
.thumb-panel__head button { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 2px; background: #fff; cursor: pointer; font-size: 21px; font-weight: 300; }
.thumb-grid { overflow: auto; padding: 18px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px 10px; overscroll-behavior: contain; }
.thumb-item { border: 0; background: transparent; padding: 0; text-align: left; cursor: pointer; }
.thumb-card { position: relative; aspect-ratio: 2480/3508; background: #fff; border: 1px solid rgba(0,0,0,.08); box-shadow: 0 6px 16px rgba(0,0,0,.06); overflow: hidden; }
.thumb-card img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb-card.is-orange { background: var(--accent); }
.thumb-card.is-video { display: grid; place-items: center; }
.thumb-play {
  width: 34px; height: 34px; border-radius: 999px;
  display: inline-grid; place-items: center;
  background: rgba(255,255,255,.18); color: #fff;
  border: 1px solid rgba(255,255,255,.42);
  font-size: 14px; font-weight: 700; text-indent: 2px;
}
.thumb-card.is-site { display: grid; place-items: center; }
.thumb-site {
  width: 34px; height: 34px; border-radius: 999px;
  display: inline-grid; place-items: center;
  background: #fff; color: var(--accent);
  font-size: 18px; font-weight: 800;
}
.thumb-no { display: block; margin-top: 6px; color: var(--muted); font-size: 9px; font-weight: 700; letter-spacing: .07em; }
.thumb-item.is-current .thumb-card { outline: 2px solid var(--ink); outline-offset: 2px; }
.thumb-item.is-current .thumb-no { color: var(--ink); }
.panel-scrim { position: absolute; z-index: 110; inset: 0; background: rgba(10,10,10,.18); opacity: 0; visibility: hidden; transition: opacity .2s ease, visibility .2s ease; }
.panel-scrim.is-open { opacity: 1; visibility: visible; }

.toast { position: absolute; z-index: 150; left: 50%; bottom: 92px; transform: translate(-50%, 12px); padding: 10px 14px; background: rgba(20,20,20,.94); color: #fff; border-radius: 2px; font-size: 11px; opacity: 0; pointer-events: none; transition: opacity .18s ease, transform .18s ease; }
.toast.is-show { opacity: 1; transform: translate(-50%,0); }


.app.is-zoomed .book-stage { cursor: grab; touch-action: none; }
.app.is-panning .book-stage { cursor: grabbing; }
.app.is-zoomed .book-sizing { z-index: 12; }
.app.is-zoomed .flip-book { pointer-events: none; }
.app.is-zoomed .edge-nav { opacity: .14; pointer-events: none; }
.app.is-layout-refreshing .book-sizing { opacity: .72; }

/* StPageFlip가 계산한 좌표/transform은 건드리지 않습니다.
   바깥 컨테이너를 정수 픽셀로 고정해 좌우 페이지의 기준선이 동일하게 계산되도록 합니다. */
.flip-book.stf__parent,
.flip-book .stf__wrapper,
.flip-book .stf__block,
.flip-book .stf__item {
  box-sizing: border-box;
}

/* Offline fallback viewer */
.kmeta-fallback-book { position: relative; width: 100%; height: 100%; perspective: 1800px; filter: drop-shadow(0 16px 26px rgba(0,0,0,.14)); }
.kmeta-fallback-book .page { position: absolute; top: 0; width: 50%; height: 100%; display: none; }
.kmeta-fallback-book .page.is-visible { display: block; }
.kmeta-fallback-book .page.is-left { left: 0; transform-origin: right center; }
.kmeta-fallback-book .page.is-right { right: 0; transform-origin: left center; }
.kmeta-fallback-book.is-cover .page.is-right { right: 25%; }
.kmeta-fallback-book.is-portrait .page { left: 0 !important; right: auto !important; width: 100%; }
.kmeta-fallback-book.is-portrait.is-cover .page.is-right { right: auto; }
.kmeta-fallback-book.is-animating-next .page.is-right { animation: kmetaFlipNext .42s ease both; }
.kmeta-fallback-book.is-animating-prev .page.is-left,
.kmeta-fallback-book.is-animating-prev.is-portrait .page.is-right { animation: kmetaFlipPrev .42s ease both; }
@keyframes kmetaFlipNext { 0% { transform: rotateY(0); } 100% { transform: rotateY(-13deg); opacity: .2; } }
@keyframes kmetaFlipPrev { 0% { transform: rotateY(0); } 100% { transform: rotateY(13deg); opacity: .2; } }

@media (max-width: 760px) {
  html, body { overscroll-behavior: none; }
  .app { height: 100vh; }
  @supports (height: 100svh) { .app { height: 100svh; } }
  .book-stage { touch-action: pinch-zoom; }
  .book-sizing { transform: none !important; transition: none !important; will-change: auto; }
  .page__image { image-rendering: auto; }
  .page2-video { left: 13%; top: 4%; width: 74%; height: 92%; }
  .page2-caption { display: none; }
  .video-center-play { top: 51.5%; width: 58px; height: 58px; }
  .video-center-play span { border-top-width: 9px; border-bottom-width: 9px; border-left-width: 14px; }
  .video-page-nav { width: 20%; }
  .video-page-nav span { font-size: 30px; opacity: .38; }
  .video-page-nav--prev { padding-left: 2.5%; }
  .video-page-nav--next { padding-right: 2.5%; }
  .site-page-inner { padding: 9%; }
  .site-link-button { width: 72%; min-height: 78px; padding: 14px 20px; gap: 5px; }
  .topbar { display: none; }
  .reader {
    top: max(4px, env(safe-area-inset-top));
    right: 0;
    bottom: 72px;
    left: 0;
    grid-template-columns: 0 minmax(0,1fr) 0;
  }
  .edge-nav { display: none; }
  .dock { height: 46px; }
  .dock__btn { width: 38px; }
  .dock__separator { margin: 0 1px; }
  .progress-track { width: 260px; }
  .thumb-panel { top: auto; width: 100%; height: min(72vh, 610px); border-left: 0; border-top: 1px solid var(--line); transform: translateY(103%); }
  .thumb-panel.is-open { transform: translateY(0); }
  .thumb-grid { grid-template-columns: repeat(4, 1fr); padding-bottom: calc(20px + env(safe-area-inset-bottom)); }
  .cta-button { min-width: 152px; height: 44px; font-size: 11px; }
}

@media (max-width: 430px) {
  .dock__separator { display: none; }
  .dock__jump { min-width: 82px; }
  .dock__jump-input { width: 31px; }
  .thumb-grid { grid-template-columns: repeat(3,1fr); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* v1.20 mobile direct renderer: no STPageFlip on mobile. */
@media (max-width: 760px) {
  html.kmeta-mobile-direct .reader {
    top: max(2px, env(safe-area-inset-top));
    bottom: 70px;
  }
  html.kmeta-mobile-direct .book-stage {
    display: block;
    perspective: none;
    overflow: hidden;
    touch-action: none;
  }
  html.kmeta-mobile-direct .book-sizing { display: none !important; }

  .mobile-reader-direct {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    overflow: hidden;
    touch-action: none;
    background: transparent;
    user-select: none;
    -webkit-user-select: none;
  }
  .mobile-page-frame {
    position: relative;
    width: auto;
    height: auto;
    max-width: none;
    max-height: none;
    aspect-ratio: 620 / 877;
    overflow: visible;
    background: #fff;
    box-shadow: 0 12px 32px rgba(0,0,0,.12);
  }
  .mobile-zoom-layer {
    position: absolute;
    inset: 0;
    transform: none;
    transform-origin: 50% 50%;
  }
  .mobile-reader-direct.is-zoomed .mobile-zoom-layer { will-change: transform; }

  .mobile-page {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #fff;
  }
  .mobile-page-image {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    image-rendering: auto;
    -webkit-user-drag: none;
  }
  .mobile-page--video,
  .mobile-page--site { background: var(--accent); }

  .mobile-page-frame {
    perspective: 1800px;
    perspective-origin: 50% 50%;
  }
  .mobile-page {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform-style: preserve-3d;
  }
  .mobile-page--incoming,
  .mobile-page--outgoing {
    transition: transform 430ms cubic-bezier(.22,.62,.25,1), box-shadow 430ms ease;
  }
  /* 다음 장: 현재 페이지가 실제 종이처럼 오른쪽에서 왼쪽으로 접힙니다. */
  .mobile-page--incoming.from-right {
    z-index: 3;
    transform: rotateY(0deg);
  }
  .mobile-page--incoming.from-right.is-active { transform: rotateY(0deg); }
  .mobile-page--outgoing.to-left {
    z-index: 5;
    transform-origin: 0% 50%;
    transform: rotateY(0deg);
    box-shadow: 0 8px 24px rgba(0,0,0,.10);
  }
  .mobile-page--outgoing.to-left.is-active {
    transform: rotateY(-82deg);
    box-shadow: 16px 8px 28px rgba(0,0,0,.18);
  }
  /* 이전 장: 이전 페이지가 왼쪽에서 다시 펼쳐집니다. */
  .mobile-page--incoming.from-left {
    z-index: 5;
    transform-origin: 0% 50%;
    transform: rotateY(-82deg);
    box-shadow: 16px 8px 28px rgba(0,0,0,.18);
  }
  .mobile-page--incoming.from-left.is-active {
    transform: rotateY(0deg);
    box-shadow: 0 8px 24px rgba(0,0,0,.10);
  }
  .mobile-page--outgoing.to-right {
    z-index: 3;
    transform: rotateY(0deg);
  }
  .mobile-page--outgoing.to-right.is-active { transform: rotateY(0deg); }

  .mobile-video-shell {
    position: absolute;
    left: 13%;
    top: 4%;
    width: 74%;
    height: 92%;
    overflow: hidden;
    background: #000;
    box-shadow: 0 14px 34px rgba(60,30,0,.20);
  }
  .mobile-page-video,
  .mobile-video-poster {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    background: #000;
  }
  .mobile-page-video {
    z-index: 1;
    pointer-events: none !important;
    -webkit-user-select: none;
    user-select: none;
  }
  .mobile-video-poster {
    z-index: 2;
    pointer-events: none;
    transition: opacity .12s ease;
  }
  .mobile-video-poster.is-hidden {
    opacity: 0;
    pointer-events: none;
  }
  .mobile-video-surface {
    position: absolute;
    z-index: 4;
    inset: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: #fff;
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }
  .mobile-video-play {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 60px;
    height: 60px;
    transform: translate(-50%, -50%);
    display: grid;
    place-items: center;
    padding: 0;
    border: 1px solid rgba(255,255,255,.76);
    border-radius: 50%;
    background: rgba(10,10,10,.54);
    color: #fff;
    box-shadow: 0 12px 30px rgba(0,0,0,.24), inset 0 0 0 1px rgba(255,255,255,.10);
    backdrop-filter: blur(7px);
    -webkit-backdrop-filter: blur(7px);
    pointer-events: none;
    transition: opacity .16s ease, transform .16s ease;
  }
  .mobile-video-play.is-hidden {
    opacity: 0;
    visibility: hidden;
  }
  .mobile-video-play span {
    width: 0;
    height: 0;
    margin-left: 4px;
    border-top: 9px solid transparent;
    border-bottom: 9px solid transparent;
    border-left: 15px solid currentColor;
  }

  /* Hide every browser-native media control/overlay we can address. */
  .mobile-page-video::-webkit-media-controls,
  .mobile-page-video::-webkit-media-controls-enclosure,
  .mobile-page-video::-webkit-media-controls-panel,
  .mobile-page-video::-webkit-media-controls-play-button,
  .mobile-page-video::-webkit-media-controls-start-playback-button,
  .mobile-page-video::-webkit-media-controls-overlay-play-button,
  .mobile-page-video::-webkit-media-controls-current-time-display,
  .mobile-page-video::-webkit-media-controls-time-remaining-display,
  .mobile-page-video::-webkit-media-controls-timeline,
  .mobile-page-video::-webkit-media-controls-volume-slider,
  .mobile-page-video::-webkit-media-controls-mute-button,
  .mobile-page-video::-webkit-media-controls-fullscreen-button,
  .mobile-page-video::-webkit-media-controls-overlay-enclosure,
  .mobile-page-video::-webkit-media-controls-rewind-button,
  .mobile-page-video::-webkit-media-controls-return-to-realtime-button {
    display: none !important;
    -webkit-appearance: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
  }

  .mobile-site-inner {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 10%;
  }
  .mobile-site-button {
    width: 76%;
    min-height: 82px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    color: #1c1815;
    background: rgba(255,255,255,.94);
    border: 1px solid rgba(255,255,255,.72);
    border-radius: 3px;
    text-decoration: none;
    box-shadow: 0 14px 30px rgba(80,38,0,.14);
  }
  .mobile-site-button span { font-size: 16px; font-weight: 800; }
  .mobile-site-button small { font-size: 10px; color: #73675d; font-weight: 600; }

  /* The caption is not rendered in mobile direct mode at all. */
  html.kmeta-mobile-direct .page2-caption,
  html.kmeta-mobile-direct .video-center-play,
  html.kmeta-mobile-direct .video-page-nav,
  html.kmeta-mobile-direct .video-portal { display: none !important; }

  html.kmeta-mobile-direct .app:fullscreen,
  html.kmeta-mobile-direct .app:-webkit-full-screen,
  html.kmeta-mobile-direct .app:fullscreen::backdrop {
    background: var(--bg) !important;
  }
}


/* v1.23: real STPageFlip mobile + custom-only video controls */
.video-toggle-surface {
  position: absolute;
  z-index: 5;
  inset: 0;
  border: 0;
  padding: 0;
  margin: 0;
  background: transparent;
  cursor: pointer;
  opacity: 0;
}
.video-toggle-surface:disabled { pointer-events: none; }
.video-center-play { z-index: 7; }
.page2-video::-webkit-media-controls,
.page2-video::-webkit-media-controls-enclosure,
.page2-video::-webkit-media-controls-panel,
.page2-video::-webkit-media-controls-overlay-play-button,
.page2-video::-webkit-media-controls-start-playback-button { display: none !important; -webkit-appearance: none !important; }

@media (max-width: 760px) {
  .page2-video { pointer-events: none !important; }
  .page2-caption { display: none !important; visibility: hidden !important; }
  .video-toggle-surface { touch-action: manipulation; }
  .book-stage { touch-action: pinch-zoom; }
  .flip-book, .flip-book * { -webkit-tap-highlight-color: transparent; }
}

@media (max-width: 760px) {
  /* v1.25: 모바일 페이지 넘김 중 리사이즈/레이아웃 표시 변화로 인한 흰 번쩍임 방지 */
  .app.is-layout-refreshing .book-sizing { opacity: 1 !important; }
  .book-sizing { opacity: 1 !important; }
}

@media (max-width: 760px) {
  /* v1.26: STPageFlip의 자체 3D 레이어만 사용. 추가 translateZ/GPU 강제 합성 금지. */
  .app.is-page-flipping .book-sizing { transform: none !important; transition: none !important; }
}

@media (max-width: 760px) {
  .page2-caption { display:none !important; visibility:hidden !important; opacity:0 !important; }
  .page2-video { pointer-events:none !important; }
}