@font-face{font-family:"ONE Mobile Title";src:url("assets/ONEMobileTitle.woff2") format("woff2");font-display:swap}
@font-face{font-family:"Pretendard";font-weight:400;src:url("assets/Pretendard-Regular.woff2") format("woff2");font-display:swap}
@font-face{font-family:"Pretendard";font-weight:500;src:url("assets/Pretendard-Medium.woff2") format("woff2");font-display:swap}
@font-face{font-family:"Pretendard";font-weight:600;src:url("assets/Pretendard-SemiBold.woff2") format("woff2");font-display:swap}
@font-face{font-family:"Pretendard";font-weight:700;src:url("assets/Pretendard-Bold.woff2") format("woff2");font-display:swap}

/* 올케어 브랜드 컬러 (브랜드키트 03_컬러 기준) */
:root{
  --navy:#171D3A; --navy-l:#2B3358; --white:#FFFFFF; --cream:#FBF8EF;
  --blue:#3A86D1; --blue-t:#E6F0FA;
  --g700:#4A5068; --g500:#7C8196; --g300:#C5C8D3; --g100:#ECEDF1;
  --stage:#E9EAEE;
  --top-h:60px; --bar-h:64px; --toc-w:300px;
  --ease:cubic-bezier(.45,.05,.25,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden}
body{position:fixed;inset:0}
body{
  font-family:"Pretendard",system-ui,sans-serif;color:var(--navy);background:var(--stage);
  letter-spacing:-0.01em;word-break:keep-all;overflow:hidden;
  -webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;
}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px}

/* ── 상단 바 ───────────────────────── */
.top{
  height:var(--top-h);background:var(--navy);color:var(--white);
  display:flex;align-items:center;gap:20px;padding:0 20px;position:relative;z-index:30;
}
.brand{display:flex;align-items:center;height:100%}
.brand img{height:30px;width:auto;display:block}
.doc-title{display:flex;align-items:baseline;gap:10px;padding-left:20px;border-left:1px solid #3A4266;line-height:1}
.doc-title .t{font-family:"ONE Mobile Title",sans-serif;font-size:20px;letter-spacing:-0.02em}
.doc-title .s{font-size:12px;font-weight:600;letter-spacing:.18em;color:#B9BED0}
.top-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.seg{display:flex;background:var(--navy-l);border-radius:999px;padding:4px}
.seg button{display:flex;align-items:center;gap:6px;height:34px;padding:0 14px;border-radius:999px;font-size:14px;font-weight:600;color:#C9CDDA;transition:background .2s,color .2s}
.seg button svg{width:18px;height:18px}
.seg button[aria-pressed="true"]{background:var(--white);color:var(--navy)}
.icon-btn{width:40px;height:40px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;gap:6px;color:#D6D9E4;transition:background .2s,color .2s}
.icon-btn:hover{background:var(--navy-l);color:var(--white)}
.icon-btn.dark{color:var(--g700)}
.icon-btn.dark:hover{background:var(--g100);color:var(--navy)}
.icon-btn:disabled{opacity:.3;pointer-events:none}

/* ── 본문 레이아웃 ───────────────────── */
.wrap{position:absolute;top:var(--top-h);bottom:var(--bar-h);left:0;right:0;display:flex}

/* 목차 */
.toc{
  width:var(--toc-w);flex:none;background:var(--white);border-right:1px solid var(--g300);
  display:flex;flex-direction:column;overflow:hidden;z-index:20;
  transition:transform .3s var(--ease);
}
.toc-head{padding:26px 24px 14px;position:relative}
.eyebrow{display:block;font-size:12px;font-weight:600;letter-spacing:.2em;color:var(--blue);margin-bottom:6px}
.toc-head h2{font-family:"ONE Mobile Title",sans-serif;font-weight:400;font-size:28px;letter-spacing:-0.02em}
.toc-close{position:absolute;top:18px;right:14px;display:none}
#tocList{flex:1;overflow-y:auto;padding:4px 12px 16px;overscroll-behavior:contain}
.chap{margin-top:10px}
.chap-btn{
  width:100%;display:flex;align-items:baseline;gap:10px;padding:10px 12px;border-radius:8px;text-align:left;
}
.chap-btn .no{font-size:15px;font-weight:700;color:var(--blue);min-width:22px;font-variant-numeric:tabular-nums}
.chap-btn .nm{font-family:"ONE Mobile Title",sans-serif;font-size:18px;letter-spacing:-0.02em}
.chap-btn:hover{background:var(--g100)}
.case{
  width:100%;display:grid;grid-template-columns:30px 1fr;gap:6px;align-items:start;
  padding:8px 12px 8px 12px;border-radius:8px;text-align:left;font-size:14px;line-height:1.45;color:var(--g700);
}
.case .pn{font-size:12px;font-weight:600;color:var(--g500);padding-top:2px;font-variant-numeric:tabular-nums}
.case:hover{background:var(--g100);color:var(--navy)}
.case.on{background:var(--blue-t);color:var(--navy);font-weight:600}
.case.on .pn{color:var(--blue)}
.toc-foot{padding:14px 24px 18px;font-size:12px;line-height:1.55;color:var(--g500);border-top:1px solid var(--g100)}
.scrim{display:none}

/* 무대 */
.stage{flex:1;position:relative;overflow:hidden;min-width:0}

/* ── 책으로 보기 ─────────────────────── */
.flip-view{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.book{
  --pw:400px;--ph:566px;
  position:relative;width:calc(var(--pw) * 2);height:var(--ph);
  perspective:2600px;transition:transform .7s var(--ease);
}
.book.single{width:var(--pw)}
.slot{
  position:absolute;top:0;width:var(--pw);height:var(--ph);background:var(--cream) center/cover no-repeat;
  cursor:zoom-in;overflow:hidden;
}
.slot img,.face img{width:100%;height:100%;display:block;object-fit:cover;user-select:none;-webkit-user-drag:none}
.slot.left{left:0;box-shadow:-6px 10px 28px rgba(23,29,58,.16)}
.slot.right{left:var(--pw);box-shadow:6px 10px 28px rgba(23,29,58,.16)}
.book.single .slot.right{left:0;box-shadow:0 10px 30px rgba(23,29,58,.18)}
.book.single .slot.left,.book.single .spine{display:none}
.slot.empty{visibility:hidden}
/* 가운데 접힘 그늘 */
.spine{
  position:absolute;top:0;left:calc(var(--pw) - 40px);width:80px;height:var(--ph);pointer-events:none;z-index:2;
  background:linear-gradient(90deg,rgba(23,29,58,0) 0%,rgba(23,29,58,.07) 40%,rgba(23,29,58,.16) 50%,rgba(23,29,58,.07) 60%,rgba(23,29,58,0) 100%);
}
.spine.off{display:none}
/* 넘어가는 종이 */
.leaf{
  position:absolute;top:0;width:var(--pw);height:var(--ph);z-index:5;display:none;
  transform-style:preserve-3d;
}
.leaf.on{display:block}
.leaf.to-left{left:var(--pw);transform-origin:left center}
.leaf.to-right{left:0;transform-origin:right center}
.leaf.anim{transition:transform .7s var(--ease)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--cream) center/cover no-repeat;overflow:hidden}
.face.back{transform:rotateY(180deg)}
.face .shade{position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .35s ease}
.leaf.to-left .front .shade{background:linear-gradient(90deg,rgba(23,29,58,.28),rgba(23,29,58,0) 60%)}
.leaf.to-left .back .shade{background:linear-gradient(270deg,rgba(23,29,58,.28),rgba(23,29,58,0) 60%)}
.leaf.to-right .front .shade{background:linear-gradient(270deg,rgba(23,29,58,.28),rgba(23,29,58,0) 60%)}
.leaf.to-right .back .shade{background:linear-gradient(90deg,rgba(23,29,58,.28),rgba(23,29,58,0) 60%)}
.leaf.mid .shade{opacity:1}

/* 한 쪽 보기 전환 */
.book.single .slot.right.swap{animation:fadeIn .38s var(--ease)}
@keyframes fadeIn{from{opacity:0;transform:translateX(var(--dx,24px))}to{opacity:1;transform:none}}

.nav-arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:8;
  width:52px;height:52px;border-radius:50%;background:var(--white);color:var(--navy);
  display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(23,29,58,.14);
  transition:opacity .2s,background .2s,color .2s;
}
.nav-arrow svg{width:26px;height:26px;stroke-width:2}
.nav-arrow:hover{background:var(--navy);color:var(--white)}
.nav-arrow.prev{left:20px}.nav-arrow.next{right:20px}
.nav-arrow:disabled{opacity:0;pointer-events:none}

.hint{
  position:absolute;left:50%;bottom:18px;transform:translateX(-50%);
  background:rgba(23,29,58,.86);color:var(--white);font-size:13px;font-weight:500;
  padding:8px 16px;border-radius:999px;pointer-events:none;transition:opacity .6s;white-space:nowrap;
}
.hint.off{opacity:0}

/* ── 크게 읽기 ───────────────────────── */
.scroll-view{position:absolute;inset:0;overflow-y:auto;padding:28px 16px 40px;display:none;scroll-behavior:smooth;overscroll-behavior:contain}
.sheet{
  width:min(920px,100%);margin:0 auto 22px;aspect-ratio:1800/2548;
  background:var(--cream) center/cover no-repeat;box-shadow:0 8px 26px rgba(23,29,58,.13);
  position:relative;cursor:zoom-in;scroll-margin-top:20px;
}
.sheet img{width:100%;height:100%;display:block;opacity:0;transition:opacity .35s}
.sheet img.ready{opacity:1}
.sheet .tag{
  position:absolute;top:-1px;right:16px;transform:translateY(-50%);
  background:var(--navy);color:var(--white);font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;
  font-variant-numeric:tabular-nums;
}
.sheet-chap{width:min(920px,100%);margin:34px auto 12px;display:flex;align-items:baseline;gap:10px}
.sheet-chap:first-child{margin-top:0}
.sheet-chap .no{font-size:15px;font-weight:700;color:var(--blue)}
.sheet-chap .nm{font-family:"ONE Mobile Title",sans-serif;font-size:22px;letter-spacing:-0.02em}

body.mode-scroll .flip-view{display:none}
body.mode-scroll .scroll-view{display:block}
body.mode-scroll #btnPrev,body.mode-scroll #btnNext{display:none}

/* ── 하단 바 ─────────────────────────── */
.bar{
  position:absolute;left:0;right:0;bottom:0;height:var(--bar-h);background:var(--white);border-top:1px solid var(--g300);
  display:flex;align-items:center;gap:16px;padding:0 16px;z-index:25;
}
.bar .icon-btn{width:auto;min-width:40px;padding:0 10px}
.bar .lbl{font-size:14px;font-weight:600}
.pager{display:flex;align-items:center;gap:4px}
.where{min-width:120px;text-align:center;line-height:1.2}
.where-text{font-size:16px;font-variant-numeric:tabular-nums;color:var(--g700)}
.where-text b{color:var(--navy);font-weight:700}
.where-chapter{font-size:12px;color:var(--g500);margin-top:2px}
#range{flex:1;min-width:60px;accent-color:var(--navy);height:24px;cursor:pointer}
.bar-right{display:flex;gap:4px}
#btnToc{display:none}

/* 전체 페이지 썸네일 */
.tray{
  position:absolute;left:0;right:0;bottom:var(--bar-h);z-index:24;background:var(--white);border-top:1px solid var(--g300);
  box-shadow:0 -10px 30px rgba(23,29,58,.1);transform:translateY(100%);visibility:hidden;
  transition:transform .3s var(--ease),visibility 0s .3s;
}
.tray.open{transform:none;visibility:visible;transition:transform .3s var(--ease)}
.tray-inner{display:flex;gap:14px;overflow-x:auto;padding:18px 20px 16px;overscroll-behavior:contain}
.thumb{flex:none;width:96px;text-align:center;font-size:12px;color:var(--g700);font-weight:600}
.thumb img{width:96px;height:136px;display:block;object-fit:cover;border:2px solid transparent;border-radius:3px;box-shadow:0 2px 8px rgba(23,29,58,.14);margin-bottom:6px;transition:border-color .2s}
.thumb:hover img{border-color:var(--g300)}
.thumb.on img{border-color:var(--blue)}
.thumb.on{color:var(--blue)}

/* ── 확대 보기 ───────────────────────── */
.zoom{position:fixed;inset:0;z-index:50;background:rgba(23,29,58,.96);display:none;touch-action:none}
.zoom.open{display:block}
.zoom-canvas{position:absolute;inset:0;overflow:hidden;cursor:grab}
.zoom-canvas.drag{cursor:grabbing}
.zoom-canvas img{position:absolute;left:0;top:0;transform-origin:0 0;user-select:none;-webkit-user-drag:none;box-shadow:0 10px 40px rgba(0,0,0,.35);background:var(--cream)}
.zoom-top{position:absolute;top:0;left:0;right:0;height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 14px 0 22px;color:var(--white);pointer-events:none}
.zoom-top>*{pointer-events:auto}
.zoom-page{font-size:15px;font-weight:600;font-variant-numeric:tabular-nums;background:rgba(43,51,88,.9);padding:6px 12px;border-radius:999px}
.nav-arrow.light{background:rgba(43,51,88,.9);color:var(--white);box-shadow:none}
.nav-arrow.light:hover{background:var(--white);color:var(--navy)}
.zoom-tools{
  position:absolute;left:50%;bottom:22px;transform:translateX(-50%);display:flex;align-items:center;gap:4px;
  background:rgba(43,51,88,.95);color:var(--white);border-radius:999px;padding:5px;
}
.zoom-tools button{height:38px;min-width:38px;border-radius:999px;display:flex;align-items:center;justify-content:center;padding:0 10px}
.zoom-tools button:hover{background:var(--navy)}
.zoom-tools .txt{font-size:13px;font-weight:600;white-space:nowrap}
#zoomPct{min-width:52px;text-align:center;font-size:13px;font-weight:600;font-variant-numeric:tabular-nums}

/* ── 반응형 ───────────────────────────── */
@media (max-width:1100px){
  .toc{position:absolute;top:0;bottom:0;left:0;transform:translateX(-100%);box-shadow:8px 0 30px rgba(23,29,58,.18)}
  body.toc-open .toc{transform:none}
  body.toc-open .scrim{display:block;position:absolute;inset:0;background:rgba(23,29,58,.35);z-index:15}
  .toc-close{display:inline-flex}
  #btnToc{display:inline-flex}
}
@media (max-width:760px){
  :root{--top-h:54px;--bar-h:60px}
  .top{gap:12px;padding:0 10px 0 16px}
  .brand img{height:24px}
  .doc-title{display:none}
  .seg button{padding:0 11px;font-size:13px;height:32px}
  .seg button svg{display:none}
  #btnFull{display:none}
  .bar{gap:6px;padding:0 8px}
  .bar .lbl{display:none}
  #range{display:none}
  .pager{flex:1;justify-content:center}
  .nav-arrow{width:42px;height:42px}
  .nav-arrow.prev{left:8px}.nav-arrow.next{right:8px}
  .scroll-view{padding:20px 0 30px}
  .sheet{margin-bottom:16px;box-shadow:0 4px 14px rgba(23,29,58,.12)}
  .sheet-chap{padding:0 16px}
  .zoom-tools .txt#zoomWidth{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms!important;animation-duration:.01ms!important}
}