@font-face{font-family:'Andika';src:url(fonts/andika-latin-700-normal.woff2);font-weight:700}
@font-face{font-family:'Fredoka';src:url(fonts/fredoka-latin-600-normal.woff2);font-weight:600}
:root{--ink:#1D1D1F;--sub:#6B7280;--line:#E9ECEF;--bg:#FFF8F1;--card:#fff;--c:#2F7DE1;--pale:#EAF3FF;--ok:#22A565;--no:#E5484D;
  --ko:-apple-system,'Apple SD Gothic Neo','Malgun Gothic','Noto Sans KR',sans-serif}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--ko);-webkit-font-smoothing:antialiased}
body{min-height:100vh;padding-bottom:env(safe-area-inset-bottom)}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
.en{font-family:'Andika',sans-serif;font-weight:700}
.fr{font-family:'Fredoka',var(--ko);font-weight:600}
.wrap{max-width:980px;margin:0 auto;padding:16px 16px 40px}
/* top bar */
.top{position:sticky;top:0;z-index:5;background:rgba(255,248,241,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);padding:calc(10px + env(safe-area-inset-top)) 16px 10px}
.top-in{max-width:980px;margin:0 auto;display:flex;align-items:center;gap:12px}
.back{width:44px;height:44px;border-radius:14px;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.08);font-size:22px;display:flex;align-items:center;justify-content:center;flex:none}
.top h1{margin:0;font-size:19px;line-height:1.2;flex:1;min-width:0}
.top h1 small{display:block;font-size:12px;color:var(--sub);font-weight:600}
.badge{font-family:'Fredoka';font-size:13px;color:#fff;border-radius:999px;padding:5px 11px;background:var(--c);white-space:nowrap}
/* gate */
.gate{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:linear-gradient(160deg,#FFF3EC,#EAF3FF 60%,#F3ECFF)}
.gate-box{width:100%;max-width:420px;background:#fff;border-radius:28px;padding:32px 26px;box-shadow:0 12px 40px rgba(31,59,120,.12);text-align:center}
.logo{font-family:'Fredoka';font-size:15px;letter-spacing:3px;color:var(--c)}
.gate h2{font-family:'Fredoka';font-size:40px;margin:6px 0 2px;line-height:1}
.gate p{color:var(--sub);font-size:14px;line-height:1.6;margin:10px 0 20px}
.gate input{width:100%;font-size:20px;text-align:center;padding:14px;border:2px solid var(--line);border-radius:16px;letter-spacing:2px;text-transform:uppercase;outline:none}
.gate input:focus{border-color:var(--c)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--c);color:#fff;font-weight:800;font-size:17px;border-radius:16px;padding:14px 22px;min-height:52px}
.btn.full{width:100%;margin-top:12px}
.btn.ghost{background:#fff;color:var(--ink);box-shadow:0 1px 4px rgba(0,0,0,.1)}
.err{color:var(--no);font-size:14px;min-height:20px;margin-top:10px}
.gate small{display:block;margin-top:18px;color:var(--sub);font-size:12px;line-height:1.6}
/* home */
.hero{border-radius:28px;padding:26px 22px;background:linear-gradient(140deg,#2F7DE1,#7B4DDB);color:#fff;margin-bottom:18px}
.hero .logo{color:#fff;opacity:.9}
.hero h2{font-family:'Fredoka';font-size:34px;margin:4px 0}
.hero p{margin:0;opacity:.92;font-size:14px;line-height:1.6}
.books{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.book{background:#fff;border-radius:24px;padding:18px;display:flex;gap:16px;align-items:center;box-shadow:0 2px 10px rgba(0,0,0,.06);text-align:left;border:2px solid transparent}
.book:active{transform:scale(.98)}
.book .num{width:64px;height:64px;border-radius:20px;color:#fff;font-family:'Fredoka';font-size:34px;display:flex;align-items:center;justify-content:center;flex:none}
.book b{display:block;font-family:'Fredoka';font-size:20px}
.book span{font-size:13px;color:var(--sub)}
.prog{height:8px;background:#F1F2F4;border-radius:99px;margin-top:8px;overflow:hidden}
.prog i{display:block;height:100%;border-radius:99px}
.prog-t{font-size:12px;color:var(--sub);margin-top:4px}
/* units */
.units{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.unit{background:#fff;border-radius:22px;padding:16px;text-align:left;box-shadow:0 2px 10px rgba(0,0,0,.06);border-top:6px solid var(--c)}
.unit .u{font-family:'Fredoka';font-size:14px}
.unit .t{font-family:'Fredoka';font-size:22px;margin:2px 0 8px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-family:'Andika';font-weight:700;font-size:15px;border-radius:10px;padding:2px 10px 4px;background:var(--pale)}
.stars{margin-top:10px;font-size:14px;color:#E0A100;letter-spacing:1px}
/* steps */
.steps{display:flex;gap:8px;overflow-x:auto;padding:12px 16px;scrollbar-width:none;max-width:980px;margin:0 auto}
.steps::-webkit-scrollbar{display:none}
.step{flex:none;border-radius:999px;padding:9px 14px;background:#fff;font-weight:800;font-size:14px;box-shadow:0 1px 4px rgba(0,0,0,.08);display:flex;gap:6px;align-items:center}
.step.on{background:var(--c);color:#fff}
.step i{font-style:normal;font-size:12px}
.panel{background:#fff;border-radius:26px;padding:20px;box-shadow:0 2px 12px rgba(0,0,0,.06);margin-bottom:14px}
.ph{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.ph h2{margin:0;font-size:19px;flex:1}
.ph .tip{font-size:13px;color:var(--sub);font-weight:600}
.howto{background:var(--pale);border-radius:16px;padding:12px 14px;font-size:14px;line-height:1.6;margin-bottom:14px}
/* learn */
.learn{display:flex;gap:16px;align-items:flex-start;flex-wrap:wrap}
.big{min-width:120px;border-radius:24px;border:4px solid var(--c);text-align:center;padding:10px 16px;background:#fff}
.big b{display:block;font-family:'Andika';font-size:60px;line-height:1.05;color:var(--c)}
.big em{font-style:normal;color:var(--sub);font-size:16px}
.learn-t{flex:1;min-width:240px}
.learn-t p{font-size:16px;line-height:1.7;margin:0 0 12px}
.play{display:inline-flex;align-items:center;gap:8px;border-radius:14px;background:var(--c);color:#fff;font-weight:800;padding:11px 16px;font-size:15px;min-height:46px}
.play.sm{padding:8px 12px;min-height:38px;font-size:13px}
.play.on{background:var(--ok)}
.exrow{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.ex{display:flex;align-items:center;gap:8px;border:2px solid var(--line);border-radius:16px;padding:6px 12px 6px 6px;background:#fff}
.ex img{width:44px;height:44px}
.ex span{font-family:'Andika';font-weight:700;font-size:20px}
.w-t b{color:var(--c)}
.w-t .e2{color:#22A565}
/* words */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.wc{background:#fff;border:2px solid var(--line);border-radius:22px;padding:12px 8px 10px;text-align:center;position:relative}
.wc.on{border-color:var(--c);box-shadow:0 0 0 4px var(--pale)}
.wc img{width:96px;height:96px}
.wc .w{font-family:'Andika';font-weight:700;font-size:26px;line-height:1.2}
.wc .ko{font-size:13px;color:var(--sub);font-weight:700}
.wc .parts{font-family:'Andika';font-weight:700;font-size:14px;color:var(--sub);margin-top:2px}
.wc .only{position:absolute;right:8px;top:8px;font-size:12px;font-weight:800;background:var(--pale);border-radius:10px;padding:4px 8px}
/* quiz */
.qtop{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.qbar{flex:1;height:10px;background:#F1F2F4;border-radius:99px;overflow:hidden}
.qbar i{display:block;height:100%;background:var(--c);transition:width .3s}
.qn{font-family:'Fredoka';font-size:16px;color:var(--sub)}
.speaker{width:96px;height:96px;border-radius:50%;background:var(--c);color:#fff;font-size:40px;display:flex;align-items:center;justify-content:center;margin:4px auto 18px;box-shadow:0 8px 20px rgba(47,125,225,.3)}
.speaker:active{transform:scale(.95)}
.opts{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;max-width:560px;margin:0 auto}
.opt{background:#fff;border:3px solid var(--line);border-radius:22px;padding:12px;display:flex;flex-direction:column;align-items:center;gap:4px;min-height:84px;justify-content:center}
.opt img{width:90px;height:90px}
.opt .l{font-family:'Andika';font-weight:700;font-size:34px}
.opt.ok{border-color:var(--ok);background:#EAF8F0}
.opt.no{border-color:var(--no);background:#FDECEC;animation:shake .3s}
@keyframes shake{25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.qpic{display:flex;flex-direction:column;align-items:center;gap:8px;margin-bottom:16px}
.qpic img{width:150px;height:150px}
.feedback{text-align:center;font-weight:800;font-size:18px;min-height:28px;margin-top:14px}
.feedback.ok{color:var(--ok)}.feedback.no{color:var(--no)}
/* spell / sentence */
.slots{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin:6px 0 18px;min-height:64px}
.slot{min-width:52px;height:64px;border-bottom:4px solid var(--c);font-family:'Andika';font-weight:700;font-size:40px;display:flex;align-items:center;justify-content:center;padding:0 4px}
.slot.w{min-width:auto;font-size:26px;border-bottom-width:3px;padding:0 8px}
.tiles{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.tile{min-width:56px;height:58px;border-radius:16px;background:#FFF4E5;border:2px solid #F6C68C;font-family:'Andika';font-weight:700;font-size:32px;padding:0 10px 4px}
.tile.w{font-size:22px;background:#F3F6FB;border-color:#C9D3E3;height:52px}
.tile.used{opacity:.25;pointer-events:none}
.acts{display:flex;justify-content:center;gap:10px;margin-top:18px;flex-wrap:wrap}
/* story */
.story h3{font-family:'Fredoka';font-size:26px;margin:0 0 12px;color:var(--c)}
.line{display:flex;align-items:center;gap:12px;padding:12px;border-radius:16px;border:2px solid var(--line);margin-bottom:10px;width:100%;text-align:left}
.line.on{border-color:var(--c);background:var(--pale)}
.line .n{width:30px;height:30px;border-radius:50%;background:var(--c);color:#fff;font-family:'Fredoka';display:flex;align-items:center;justify-content:center;flex:none}
.line .s{font-family:'Andika';font-weight:700;font-size:22px;line-height:1.35}
.done{text-align:center;padding:20px 10px}
.done .big-star{font-size:56px;color:#E0A100;letter-spacing:4px}
.done h3{font-family:'Fredoka';font-size:30px;margin:8px 0}
.foot-note{font-size:12px;color:var(--sub);text-align:center;margin-top:24px;line-height:1.6}
@media (max-width:560px){
  .big b{font-size:48px}.wc img{width:80px;height:80px}.wc .w{font-size:22px}
  .opt img{width:72px;height:72px}.qpic img{width:120px;height:120px}
  .tile{min-width:48px;height:52px;font-size:28px}.slot{min-width:42px;font-size:34px}
  .hero h2{font-size:28px}
}
/* 공부완료 · 교재 아이디 */
.who{font-size:13px;color:var(--sub);text-align:right;margin:4px 2px 8px}
.who b{color:#1F2A44;letter-spacing:1px}
.fin{color:var(--sub);font-weight:600}.fin.on{color:#16A34A}
.unit{position:relative}
.unit.fin{background:linear-gradient(180deg,#F0FDF4,#fff 60%)}
.fin-tag{position:absolute;top:12px;right:12px;background:#16A34A;color:#fff;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;box-shadow:0 2px 6px rgba(22,163,74,.3)}
.donebar{background:#DCFCE7;color:#166534;border:2px solid #86EFAC;border-radius:16px;padding:10px 14px;font-size:14px;margin:0 0 12px;text-align:center}
#toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,40px);opacity:0;background:#166534;color:#fff;padding:12px 18px;border-radius:16px;font-size:15px;box-shadow:0 8px 24px rgba(0,0,0,.25);transition:.3s;z-index:99;max-width:90vw;text-align:center;pointer-events:none}
#toast.show{transform:translate(-50%,0);opacity:1}
.book.locked{opacity:.75;background:#F7F7F9}
.book.locked .prog-t{color:var(--c);font-weight:700}
.link{color:var(--c);text-decoration:underline;font-size:13px}
.mine{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin:14px 0 8px}
.mine span{background:#EEF4FF;border-radius:999px;padding:5px 10px;font-size:12px;font-weight:700;color:#1F3B78}
.state{margin-top:6px;font-size:12px;font-weight:700;border-radius:10px;padding:5px 8px;display:inline-block}
.state.l{background:#E0F2FE;color:#0369A1}
.state.q{background:#FEF3C7;color:#B45309}