:root{
  /* 양피지/종이 */
  --paper:#fbf4e6; --paper-deep:#f4e9d2; --paper-edge:#ece0c4; --card:#fffdf7;
  /* 잉크 텍스트 */
  --ink:#3d2c1d; --ink-soft:#6b5640; --ink-faint:#9a866d;
  /* 브랜드 포인트 — 부기 주황(기존 서재 톤으로 통일) */
  --brand:#f08a24; --brand-deep:#d9760a; --brand-soft:#ffe6c2;
  --grad-sun:linear-gradient(135deg,#ffc83d 0%,#ff7a45 100%);
  --grad-cream:#fbf4e6;
  --surface:#ffffff; --surface-soft:#fff8ef; --line:#f0e5d8; --muted:#9a866d;
  --c-green:#3f9d52; --c-orange:#f08a24;
  /* 학년 6색 (라이트/메인/딥) — 흙·식물·하늘 계열 유지 */
  --g1-l:#f0b49b; --g1:#cf7150; --g1-d:#a9532f;
  --g2-l:#f1cd8d; --g2:#d59a3a; --g2-d:#a9741f;
  --g3-l:#bcd0a6; --g3:#82a35e; --g3-d:#5f7e3e;
  --g4-l:#9ccfc9; --g4:#479b94; --g4-d:#2f736d;
  --g5-l:#a9c3da; --g5:#5d87ab; --g5-d:#3e6488;
  --g6-l:#c4aacb; --g6:#8c6193; --g6-d:#6a4570;
  --radius:18px; --r-md:18px; --r-pill:999px;
  --shadow:0 14px 34px -18px rgba(61,44,29,.45);
  --shadow-sm:0 6px 16px -10px rgba(61,44,29,.4);
  --header-h:64px; --ease:cubic-bezier(.4,0,.2,1);
  --serif:'Noto Serif KR','Pretendard','Pretendard Variable',serif; --display:'Cormorant Garamond',serif;
  --sans:'Pretendard','Pretendard Variable',-apple-system,sans-serif;
  --font:var(--sans);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 58px)}
body{margin:0;font-family:var(--sans);color:var(--ink);line-height:1.6;word-break:keep-all;overflow-wrap:break-word;
  background:radial-gradient(1200px 600px at 80% -10%,#fff8ea 0,transparent 60%),radial-gradient(900px 500px at 0% 10%,#fdf6e6 0,transparent 55%),var(--paper)}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.045'/%3E%3C/svg%3E")}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
.wrap{width:min(1180px,92vw);margin-inline:auto;position:relative;z-index:1}
/* 헤더 */
header.site{position:sticky;top:0;z-index:50;height:var(--header-h);background:#fbf4e6;border-bottom:1px solid var(--paper-edge)}
.header-in{height:100%;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand .mascot{width:44px;height:44px;border-radius:50%;background:radial-gradient(circle at 32% 30%,#fff,var(--brand-soft) 70%);border:2px solid #fff;box-shadow:var(--shadow-sm);display:grid;place-items:center;overflow:hidden;flex-shrink:0}
.brand .mascot img{width:100%;height:100%;object-fit:contain;padding:3px}
.brand .names{display:flex;flex-direction:column;line-height:1.05}
.brand .nm{font-family:var(--serif);font-weight:700;font-size:20px;letter-spacing:-.01em}
.brand .sl{font-size:12px;font-weight:600;color:var(--ink-soft)}
.search{margin-left:auto;display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--paper-edge);border-radius:999px;padding:8px 14px;min-width:0;box-shadow:inset 0 1px 2px rgba(61,44,29,.05)}
.search svg{width:17px;height:17px;color:var(--ink-faint);flex-shrink:0}
.search input{border:none;background:none;outline:none;font-size:14px;color:var(--ink);width:200px;max-width:30vw;font-family:inherit}
.search input::placeholder{color:var(--ink-faint)}
.search input::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}
.btn-app{flex-shrink:0;display:inline-flex;align-items:center;gap:8px;padding:8px 16px 8px 8px;border-radius:999px;background:var(--grad-sun);color:#fff;font-weight:800;font-size:14px;box-shadow:0 8px 20px rgba(245,124,40,.32);transition:transform .15s var(--ease),box-shadow .15s}
.btn-app .te-ic{width:30px;height:30px;border-radius:50%;object-fit:cover;object-position:center;background:#fff;box-shadow:0 1px 3px rgba(120,80,20,.25)}
.btn-app:hover{transform:translateY(-1px);box-shadow:0 12px 26px rgba(245,124,40,.42)}
/* 히어로 */
.hero{padding:66px 0 52px;position:relative;overflow:hidden;display:grid;grid-template-columns:1.15fr .85fr;gap:30px;align-items:center}
.hero::after{content:"";position:absolute;right:-8%;top:-30%;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(240,138,36,.14),transparent 65%);pointer-events:none}
.hero .eyebrow{font-family:var(--display);font-style:italic;font-size:22px;color:var(--brand);letter-spacing:.01em;margin-bottom:14px}
.hero h1{font-family:var(--serif);font-weight:700;font-size:clamp(32px,5.2vw,56px);line-height:1.18;margin:0 0 8px;letter-spacing:-.015em;max-width:16ch}
.hero h1 .accent{color:var(--brand-deep)}
.hero p.lead{font-size:17px;color:var(--ink-soft);max-width:46ch;margin:0 0 30px}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.btn-primary{display:inline-flex;align-items:center;gap:10px;padding:15px 28px;border-radius:999px;font-size:16.5px;font-weight:700;background:var(--grad-sun);color:#fff;box-shadow:0 12px 26px -12px rgba(245,124,40,.8);transition:transform .15s var(--ease),box-shadow .15s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 30px -14px rgba(245,124,40,.85)}
.btn-primary svg{width:18px;height:18px}
.btn-ghost{padding:14px 22px;border-radius:999px;font-weight:700;font-size:15px;color:var(--brand-deep);border:1.5px solid var(--brand-soft);background:var(--card);transition:background .15s,transform .15s}
.btn-ghost:hover{background:var(--brand-soft);transform:translateY(-2px)}
.hero-stats{display:flex;gap:34px;margin-top:42px;flex-wrap:wrap}
.hero-stats .st{display:flex;flex-direction:column}
.hero-stats .st b{font-family:var(--serif);font-size:28px;color:var(--ink);white-space:nowrap}
.hero-stats .st span{font-size:13px;color:var(--ink-faint)}
.hero-art{position:relative;min-height:300px;display:grid;place-items:center}
.book-stack{position:relative;width:240px;height:300px}
.book-stack .bk{position:absolute;left:50%;border-radius:6px 12px 12px 6px;box-shadow:var(--shadow);transform-origin:center}
.bk1{width:150px;height:204px;background:linear-gradient(135deg,var(--g6-l),var(--g6));top:54px;transform:translateX(-58%) rotate(-9deg)}
.bk2{width:150px;height:204px;background:linear-gradient(135deg,var(--g4-l),var(--g4));top:46px;transform:translateX(-44%) rotate(5deg)}
.bk3{width:150px;height:204px;background:linear-gradient(135deg,var(--g2-l),var(--g2));top:36px;transform:translateX(-50%) rotate(-2deg);border-left:8px solid rgba(0,0,0,.12)}
.hero-art .big-mascot{position:absolute;right:0;bottom:6px;width:120px;height:120px;border-radius:50%;background:radial-gradient(circle at 34% 30%,#fff,var(--brand-soft) 72%);border:4px solid #fff;box-shadow:var(--shadow);display:grid;place-items:center;overflow:hidden}
.hero-art .big-mascot img{width:100%;height:100%;object-fit:contain;padding:7px}
/* 섹션 공통 */
section.block{padding:54px 0}
.sec-head{text-align:center;margin-bottom:38px}
.sec-kicker{font-family:var(--display);font-style:italic;font-size:18px;color:var(--brand);letter-spacing:.06em;text-transform:uppercase}
.sec-head h2{font-family:var(--serif);font-weight:700;font-size:clamp(26px,3.6vw,38px);margin:6px 0 8px}
.sec-head p{color:var(--ink-soft);max-width:50ch;margin:0 auto}
/* 3대 기능 */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature{background:var(--card);border:1px solid var(--paper-edge);border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow-sm);position:relative;overflow:hidden;transition:transform .2s var(--ease),box-shadow .2s;text-align:left;width:100%;cursor:pointer;display:block;font:inherit;color:inherit}
.feature:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.feature .ico{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;background:var(--paper-deep);border:1px solid var(--paper-edge);margin-bottom:16px}
.feature .ico svg{width:30px;height:30px;color:var(--brand-deep)}
.feature h3{font-family:var(--serif);font-weight:700;font-size:21px;margin:0 0 8px}
.feature p{color:var(--ink-soft);font-size:14.5px;margin:0 0 16px}
.feature .more{font-weight:700;font-size:14px;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.feature .more svg{width:15px;height:15px;transition:transform .2s var(--ease)}
.feature:hover .more svg{transform:translateX(4px)}
.feature .tag{position:absolute;top:18px;right:18px;font-family:var(--display);font-style:italic;font-size:40px;color:var(--paper-deep);line-height:1;user-select:none}
/* 학년별 도서관 */
.library{background:linear-gradient(180deg,transparent,rgba(244,233,210,.55) 14%,rgba(244,233,210,.55) 92%,transparent);padding-bottom:50px}
.grade-nav-wrap{position:sticky;top:var(--header-h);z-index:40;background:#fbf4e6;border-block:1px solid var(--paper-edge)}
.grade-nav{display:flex;gap:8px;padding:11px 0;overflow-x:auto;scrollbar-width:none}
.grade-nav::-webkit-scrollbar{display:none}
.gn-btn{flex-shrink:0;padding:8px 17px;border-radius:999px;font-size:14.5px;font-weight:700;color:var(--ink-soft);border:1.5px solid transparent;background:transparent;transition:all .18s var(--ease);white-space:nowrap}
.gn-btn:hover{background:var(--card);color:var(--ink)}
.gn-btn.is-on{color:#fff;box-shadow:var(--shadow-sm)}
.gn-btn.nav-all.is-on{background:var(--brand)}
.gn-btn.g1.is-on{background:var(--g1)}
.gn-btn.g2.is-on{background:var(--g2)}
.gn-btn.g3.is-on{background:var(--g3)}
.gn-btn.g4.is-on{background:var(--g4)}
.gn-btn.g5.is-on{background:var(--g5)}
.gn-btn.g6.is-on{background:var(--g6)}
.grades{padding-top:28px}
.grade{border-top:1px solid var(--paper-edge)}
.grade:last-child{border-bottom:1px solid var(--paper-edge)}
.grade-head{width:100%;display:flex;align-items:center;gap:18px;padding:22px 6px;text-align:left;background:transparent;transition:background .18s;cursor:pointer}
.grade-head:hover{background:rgba(255,253,247,.6)}
.tile{width:54px;height:54px;border-radius:16px;flex-shrink:0;display:grid;place-items:center;color:#fff;font-family:var(--serif);font-weight:700;font-size:25px;background:linear-gradient(155deg,var(--tl),var(--tm) 55%,var(--td));box-shadow:0 8px 16px -8px rgba(61,44,29,.5),inset 0 2px 3px rgba(255,255,255,.5),inset 0 -3px 5px rgba(0,0,0,.18);text-shadow:0 1px 2px rgba(0,0,0,.25)}
.grade-head .gtxt{display:flex;flex-direction:column}
.grade-head .gtxt .t{font-family:var(--serif);font-weight:700;font-size:22px}
.grade-head .gtxt .d{font-size:13.5px;color:var(--ink-faint)}
.grade-head .count{margin-left:auto;font-size:13px;color:var(--ink-faint);display:flex;align-items:center;gap:14px}
.chev{width:26px;height:26px;color:var(--ink-soft);transition:transform .45s var(--ease)}
.grade.open .chev{transform:rotate(180deg)}
.panel{height:0;overflow:hidden}
.grade.open .panel{height:auto}
.panel-inner{min-height:0}
@keyframes panelExpand{from{height:0}to{height:var(--ph,2000px)}}
@media(prefers-reduced-motion:no-preference){.grade.open .panel{animation:panelExpand .52s var(--ease) 24ms}}
.books{display:grid;gap:20px;padding:6px 6px 34px;grid-template-columns:repeat(auto-fill,minmax(186px,1fr))}
.book{transition:transform .22s var(--ease)}
@keyframes bookWipe{from{clip-path:inset(0 100% 0 0);opacity:0;transform:translateY(6px)}to{clip-path:inset(0 0 0 0);opacity:1;transform:translateY(0)}}
@media(prefers-reduced-motion:no-preference){.grade.open .book{animation:bookWipe .5s var(--ease)}}
.book.has-text .cover,.book.has-text .bt{cursor:pointer}
.cover{position:relative;aspect-ratio:3/4;border-radius:10px;overflow:hidden;background:linear-gradient(150deg,var(--bl),var(--bm) 58%,var(--bd));box-shadow:var(--shadow-sm);border-left:7px solid rgba(0,0,0,.16)}
.cover::after{content:"";position:absolute;left:0;top:0;bottom:0;width:7px;background:linear-gradient(90deg,rgba(255,255,255,.35),transparent);z-index:2}
.cover.has-img>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 22%}
.cover .plate{position:absolute;inset:16px 14px;border:1.5px solid rgba(255,255,255,.55);border-radius:6px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:10px;gap:7px}
.cover .plate .ct{font-family:var(--serif);font-weight:700;color:#fff;font-size:17px;line-height:1.3;text-shadow:0 1px 3px rgba(0,0,0,.3)}
.cover .plate .ca{font-size:11.5px;color:rgba(255,255,255,.82)}
.cover .cmeta{position:absolute;top:9px;right:9px;background:rgba(0,0,0,.5);color:#fff;font-size:10px;font-weight:800;padding:3px 9px;border-radius:999px;backdrop-filter:blur(4px);letter-spacing:.04em;z-index:3}
.cover .ccountry{position:absolute;bottom:9px;left:9px;background:rgba(255,255,255,.92);font-size:10px;font-weight:800;padding:3px 8px;border-radius:999px;color:var(--ink);z-index:3;display:inline-flex;align-items:center;gap:5px}
.cover .ccountry .flag{width:14px;height:10px;object-fit:cover;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.12)}
.cover:hover{box-shadow:var(--shadow)}
.book .meta{padding:11px 4px 0}
.book .meta .bt{font-family:var(--serif);font-weight:700;font-size:16px;line-height:1.3}
.book .meta .ba{font-size:12.5px;color:var(--ink-faint);margin-top:2px}
.book .meta .ba span{opacity:.8}
.book .meta .desc{font-size:13px;font-weight:500;color:var(--ink-soft);margin-top:7px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.6em}
.book .acts{display:flex;gap:7px;margin-top:10px}
.book .acts button{flex:1;padding:7px 0;border-radius:9px;font-size:12.5px;font-weight:700;border:1.5px solid var(--paper-edge);background:var(--card);color:var(--ink-soft);transition:all .15s var(--ease)}
.book .acts .quiz:hover:not([disabled]){background:var(--brand-soft);border-color:var(--brand);color:var(--brand-deep)}
.book .acts .quiz[disabled]{opacity:.45;cursor:default}
.book .acts .plan:hover{background:#eef3ee;border-color:var(--g3);color:var(--g3-d)}
/* 푸터 */
footer.site{background:#33271a;color:#d9cbb6;padding:42px 0 34px;position:relative;z-index:1;margin-top:10px}
.foot-top{display:flex;gap:40px;flex-wrap:wrap;align-items:flex-start;justify-content:space-between}
.foot-brand{display:flex;align-items:center;gap:12px}
.foot-brand .mascot{width:42px;height:42px;border-radius:50%;background:radial-gradient(circle at 32% 30%,#fff,var(--brand-soft) 70%);border:2px solid #4a3a28;display:grid;place-items:center;overflow:hidden}
.foot-brand .mascot img{width:100%;height:100%;object-fit:contain;padding:3px}
.foot-brand .nm{font-family:var(--serif);font-weight:700;font-size:19px;color:#f4e9d2}
.foot-links{display:flex;gap:46px;flex-wrap:wrap}
.foot-col h4{font-size:13px;color:#fff;margin:0 0 12px;font-weight:600}
.foot-col a{display:block;font-size:13.5px;color:#c2b39c;margin-bottom:8px;transition:color .15s;cursor:pointer}
.foot-col a:hover{color:#fff}
.foot-note{border-top:1px solid #4a3a28;margin-top:30px;padding-top:20px;font-size:12.5px;color:#a8987f;line-height:1.7}
/* 독후 퀴즈 모달 */
.qmodal{position:fixed;inset:0;z-index:120;background:rgba(40,28,16,.66);backdrop-filter:blur(4px);display:grid;place-items:center;padding:22px}
.qmodal[hidden]{display:none}
.qbox{background:var(--paper);border-radius:20px;box-shadow:0 30px 70px -20px rgba(0,0,0,.6);width:min(540px,96vw);max-height:92vh;overflow:auto;animation:qpop .28s var(--ease)}
@keyframes qpop{from{transform:scale(.94);opacity:0}to{transform:scale(1);opacity:1}}
.qhead{display:flex;align-items:flex-start;gap:12px;padding:20px 22px 14px;border-bottom:1px solid var(--paper-edge)}
.qhead .qbook{font-family:var(--serif);font-weight:700;font-size:18px}
.qhead .qstep{font-size:12.5px;color:var(--ink-faint);margin-top:3px}
.qhead .qx{margin-left:auto;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;color:var(--ink-soft);font-size:18px}
.qhead .qx:hover{background:var(--paper-deep)}
.qbody{padding:20px 22px 24px}
.qq{font-size:16px;font-weight:700;line-height:1.5;margin-bottom:16px}
.qchoices{display:flex;flex-direction:column;gap:10px}
.qchoice{text-align:left;padding:13px 16px;border-radius:12px;border:1.5px solid var(--paper-edge);background:var(--card);font-size:14.5px;font-weight:600;color:var(--ink);transition:all .14s var(--ease);display:flex;gap:10px;align-items:center}
.qchoice .qci{width:24px;height:24px;flex-shrink:0;border-radius:50%;background:var(--paper-deep);display:grid;place-items:center;font-size:12.5px;font-weight:800;color:var(--ink-soft)}
.qchoice:hover:not(:disabled){border-color:var(--brand);background:var(--brand-soft)}
.qchoice.correct{border-color:#3f9d52;background:#e7f6e9;color:#1f7a34}
.qchoice.correct .qci{background:#3f9d52;color:#fff}
.qchoice.wrong{border-color:#d9534f;background:#fbe9e8;color:#a23330}
.qchoice.wrong .qci{background:#d9534f;color:#fff}
.qchoice:disabled{cursor:default}
.qexplain{margin-top:14px;padding:13px 15px;border-radius:12px;background:var(--paper-deep);font-size:13.5px;color:var(--ink-soft);line-height:1.6}
.qexplain b{color:var(--brand-deep)}
.qnext{margin-top:16px;width:100%;padding:13px;border-radius:12px;background:var(--grad-sun);color:#fff;font-weight:800;font-size:15px;box-shadow:0 8px 20px -8px rgba(245,124,40,.7)}
.qresult{text-align:center;padding:14px 0 4px}
.qresult .qscore{font-family:var(--serif);font-size:40px;font-weight:700;color:var(--brand-deep)}
.qresult .qmsg{font-size:15px;color:var(--ink-soft);margin:6px 0 18px}
.qresult .qbtns{display:flex;gap:10px}
.qresult .qbtns button{flex:1;padding:12px;border-radius:12px;font-weight:800;font-size:14.5px}
.qresult .qretry{background:var(--card);border:1.5px solid var(--paper-edge);color:var(--ink-soft)}
.qresult .qclose{background:var(--grad-sun);color:#fff}
/* 인트로 오버레이: 기본 숨김('지금 읽기 시작' 클릭 시에만 재생) */
.intro-overlay[hidden]{display:none}
/* 페이지 전환 페이드(서재↔메인): 들어올 때 크림에서 페이드인, 나갈 때 크림으로 덮은 뒤 이동 → 이전 페이지 안 보임. 양방향 모두 트랜지션 기반(동작 줄이기에서도 동일) */
.page-fade{position:fixed;inset:0;z-index:200;background:#fbf4e6;pointer-events:none;opacity:0;transition:opacity .45s ease}
.page-fade.cover{opacity:1;animation:pfSafety 0s linear 2.5s forwards}
@keyframes pfSafety{to{opacity:0}}
/* 반응형 */
@media(max-width:880px){
  .hero{grid-template-columns:1fr;padding:44px 0 32px}
  .hero-art{display:none}
  .feature-grid{grid-template-columns:1fr}
  .books{grid-template-columns:repeat(2,1fr);gap:14px}
  .brand .sl{display:none}
  .search{display:none}
}
@media(min-width:881px) and (max-width:1100px){.feature-grid{grid-template-columns:1fr 1fr}}
@media(prefers-reduced-motion:reduce){*{animation:none !important}}
/* 전자책 뷰어 (밀리의 서재 풍) */
.reader{position:fixed;inset:0;background:rgba(28,22,18,.72);backdrop-filter:blur(5px);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}
.reader[hidden]{display:none}
.ebook{position:relative;width:min(980px,96vw);height:min(740px,93vh);display:flex;flex-direction:column;background:#fbf4e6;border-radius:14px;box-shadow:0 30px 90px rgba(0,0,0,.55);overflow:hidden;transform-origin:center center}
/* 오프닝: 닫힌 책(표지 2장)이 본문을 덮었다가 중앙→바깥으로 펼쳐지며 열림 */
/* perspective(원근) 제거 → 평면 rotateY 펼침. 표지 잎이 화면 앞으로 못 튀어나와 모달 경계를 절대 못 넘음(브라우저 무관). */
.book-fold{position:absolute;inset:0;z-index:20;display:none;border-radius:14px;overflow:hidden;pointer-events:none;transform-style:flat}
.book-fold .leaf{position:absolute;top:0;height:100%;width:50%;backface-visibility:hidden;overflow:hidden}
/* 카드의 실제 표지 그림을 좌/우 절반으로 입힘(모달 전체 크기로 cover 후 절반씩 클립 → 매끄럽게 이어짐) */
.book-fold .leaf .leaf-cover{position:absolute;top:0;height:100%;width:200%;object-fit:cover;object-position:center 22%;backface-visibility:hidden;display:none}
.book-fold .leaf.l .leaf-cover{left:0}
.book-fold .leaf.r .leaf-cover{left:-100%}
/* 표지: 살짝 따뜻한 양피지 톤(본문 크림색과 구분) + 책등(중앙) 쪽 음영 */
.book-fold .leaf.l{left:0;transform-origin:left center;background:linear-gradient(90deg,#e7d7b2 0%,#f4ecd6 90%);box-shadow:inset -16px 0 26px -12px rgba(78,56,24,.55)}
.book-fold .leaf.r{right:0;transform-origin:right center;background:linear-gradient(270deg,#e7d7b2 0%,#f4ecd6 90%);box-shadow:inset 16px 0 26px -12px rgba(78,56,24,.55)}
/* 표지 면에 비스듬한 음영 — 열리며 빛을 받는 입체감 */
.book-fold .leaf::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(60,42,16,.20),transparent 62%)}
.book-fold .leaf.r::after{background:linear-gradient(270deg,rgba(60,42,16,.20),transparent 62%)}
/* 닫힌 책 표지(제목·저자·부기) — 갈라지지 않는 단일 오버레이 */
.book-fold .cover-art{position:absolute;inset:0;z-index:30;display:flex;align-items:center;justify-content:center;border-radius:14px;background:radial-gradient(120% 120% at 50% 30%,#e6d3a6 0%,#d6bd88 70%,#cbb079 100%);box-shadow:inset 0 0 0 1px rgba(120,90,40,.35),inset 0 0 60px rgba(90,62,22,.18)}
.book-fold .cv-inner{display:flex;flex-direction:column;align-items:center;gap:16px;padding:44px 52px;margin:26px;border:2px double rgba(108,78,32,.6);border-radius:10px;max-width:80%}
.book-fold .cv-mascot{width:104px;height:104px;object-fit:contain;filter:drop-shadow(0 5px 12px rgba(90,60,20,.28))}
.book-fold .cv-title{font-family:'Noto Serif KR','Pretendard',serif;font-size:34px;font-weight:700;color:#41310d;text-align:center;word-break:keep-all;line-height:1.32;letter-spacing:.01em}
.book-fold .cv-rule{width:46px;height:2px;background:rgba(108,78,32,.55)}
.book-fold .cv-author{font-family:'Noto Serif KR','Pretendard',serif;font-size:15px;font-weight:400;color:#735b2c;letter-spacing:.02em}
.ebook-bar{display:flex;align-items:center;gap:12px;padding:10px 14px 10px 16px;background:#f2e7cf;border-bottom:1px solid #e4d5b4}
.eb-mascot{width:54px;height:54px;object-fit:contain;flex:none;margin-right:-2px}
.eb-title{flex:1;min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.eb-title b{font-size:16px;font-weight:800;color:#3a3120}
.eb-title span{font-size:11.5px;color:#9a895f;margin-left:8px}
.eb-tabs{display:flex;gap:6px;flex:0 0 auto}
.eb-tabs button{padding:7px 14px;border:1.5px solid #ddcca6;background:#fff;border-radius:999px;font-size:12.5px;font-weight:800;color:#8a7647;cursor:pointer;font-family:inherit;transition:all .15s}
.eb-tabs button.on{background:linear-gradient(135deg,#ffc83d,#ff7a45);color:#fff;border-color:transparent}
.eb-size{display:flex;gap:5px;flex:0 0 auto}
.eb-size button{width:34px;height:30px;border:1.5px solid #ddcca6;background:#fff;border-radius:8px;color:#8a7647;font-weight:800;cursor:pointer;font-family:inherit;line-height:1;white-space:nowrap}
.eb-size button:hover{background:#fff7e6}
.eb-size button:first-child{font-size:11px}
.eb-size button:last-child{font-size:14px}
.eb-x{flex:0 0 auto;width:32px;height:32px;border:none;border-radius:50%;background:rgba(80,60,30,.1);cursor:pointer;font-size:14px;color:#5a4a2a;line-height:1}
.eb-x:hover{background:rgba(80,60,30,.2)}
.ebook-stage{flex:1;position:relative;display:flex;align-items:center;justify-content:center;min-height:0}
.eb-arrow{flex:0 0 auto;width:50px;border:none;background:transparent;font-size:36px;color:#bfa46e;cursor:pointer;transition:color .15s,background .15s;z-index:2}
.eb-arrow:hover:not(:disabled){color:#7a6532;background:rgba(120,90,40,.06)}
.eb-arrow:disabled{opacity:.22;cursor:default}
.ebook-paper{position:relative;flex:1;min-width:0;height:100%;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:8px}
#r-flip{margin:0 auto}
.page{background:#fbf4e6;overflow:hidden}
.pi{height:100%;box-sizing:border-box;padding:34px 36px;overflow:hidden;font-family:'Noto Serif KR','Pretendard','Pretendard Variable',serif;line-height:2.05;color:#39301d;word-break:keep-all;letter-spacing:0}
.pi p{margin:0;text-indent:1em}
.pi .ebsp{height:.6em;text-indent:0}
.page-measure{position:absolute;left:-99999px;top:0;visibility:hidden;height:auto;overflow:visible;padding:0}
.ebook-foot{padding:9px;text-align:center;font-size:12px;color:#9a895f;background:#f2e7cf;border-top:1px solid #e4d5b4;font-weight:700;letter-spacing:.03em}
@media(max-width:760px){.pi{padding:24px 22px;line-height:2}.eb-arrow{width:34px;font-size:26px}.eb-title span{display:none}.eb-tabs button{padding:7px 11px;font-size:12px}}
/* ── 인트로 영상 오버레이 (메인 진입 전 8초 스플래시) ── */
.intro-overlay{position:fixed;inset:0;z-index:99999;background:#fbf4e6;display:flex;align-items:center;justify-content:center;opacity:1;transition:opacity .6s ease}
.intro-overlay.hide{opacity:0;pointer-events:none}
/* 영상 가장자리를 부드럽게 페이드시켜 배경 크림색에 녹임(색 미세차 은폐). aspect-ratio로 레터박스 제거 후 4변 6% 페더 */
.intro-video{width:50%;height:auto;aspect-ratio:1080/608;object-fit:contain;background:transparent;
  -webkit-mask:linear-gradient(90deg,#0000,#000 6%,#000 94%,#0000),linear-gradient(#0000,#000 6%,#000 94%,#0000);
  -webkit-mask-composite:source-in;
  mask:linear-gradient(90deg,#0000,#000 6%,#000 94%,#0000),linear-gradient(#0000,#000 6%,#000 94%,#0000);
  mask-composite:intersect}
.intro-skip{position:fixed;top:max(16px,env(safe-area-inset-top));right:max(16px,env(safe-area-inset-right));z-index:100000;display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border:0;border-radius:999px;background:rgba(20,20,20,.55);color:#fff;font-size:14px;font-weight:700;letter-spacing:.02em;cursor:pointer;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);transition:background .2s ease,transform .2s ease}
.intro-skip:hover{background:rgba(20,20,20,.8);transform:scale(1.04)}
.intro-skip:focus-visible{outline:2px solid #fff;outline-offset:2px}
/* ── 부기 말풍선 (인트로 8초 타임라인에 맞춰 순차 등장) ── */
.intro-bubble{position:absolute;left:50%;top:9%;transform:translateX(-50%) scale(.85);z-index:100001;
  max-width:min(90vw,560px);padding:20px 32px;border-radius:24px;background:#fff;border:3px solid #f0e3c4;
  color:#39301d;font-weight:800;font-size:clamp(26px,4.6vw,46px);line-height:1.35;text-align:center;
  word-break:keep-all;box-shadow:0 14px 34px rgba(120,90,30,.18);opacity:0;pointer-events:none;
  transition:opacity .3s ease,transform .3s cubic-bezier(.34,1.56,.64,1)}
.intro-bubble b{color:#f08a24}
.intro-bubble::after{content:"";position:absolute;left:50%;bottom:-16px;transform:translateX(-50%);width:0;height:0;
  border:16px solid transparent;border-top-color:#fff;border-bottom:0}
.intro-bubble.show{opacity:1;transform:translateX(-50%) scale(1)}
@media(prefers-reduced-motion:reduce){.intro-overlay{transition:none}}