*{box-sizing:border-box}
:root{--c:#22a06b;--ink:#2b2140;--bg:#fff7ec;--card:#fff;--sun:#ffc94d;--coral:#ff8a5b;--sky:#5aa9f0;--mint:#5cc8a8;--pink:#ff7aa8}
body[data-lv=y]{--c:#22a06b;--c2:#e6f7ef}body[data-lv=b]{--c:#2f6fe0;--c2:#e7efff}body[data-lv=t]{--c:#8a3fd1;--c2:#f2e8fc}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Rubik","Heebo","Assistant",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55;font-size:17px;min-height:100vh;display:flex;flex-direction:column}
main{flex:1;width:100%;max-width:760px;margin:0 auto;padding:12px 14px 24px}
a{color:inherit}
.top{position:sticky;top:0;z-index:20;background:linear-gradient(90deg,var(--c),#ff8a5b);color:#fff;display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:8px 12px;box-shadow:0 3px 12px #0002}
.brand{font-weight:900;font-size:20px;text-decoration:none;flex:1;white-space:nowrap}
.sharebtn{border:0;border-radius:999px;background:#ffffff33;color:#fff;font:inherit;font-weight:800;font-size:15px;padding:7px 14px;min-height:40px;cursor:pointer}
.lvl{display:flex;gap:6px;flex:1 1 100%}
.lvl button{flex:1;border:0;border-radius:999px;padding:8px 6px;font:inherit;font-weight:800;font-size:15px;background:#ffffff2e;color:#fff;cursor:pointer;min-height:42px}
.lvl button.on{background:#fff;color:var(--c);box-shadow:0 2px 8px #0003}
.trsel{flex:1 1 100%;border:0;border-radius:999px;padding:8px 14px;font:inherit;font-size:15px;font-weight:700;background:#fff;color:var(--ink);min-height:40px}
.hero{position:relative;overflow:hidden;text-align:center;background:radial-gradient(circle at 30% 20%,#fff6c9,transparent 60%),linear-gradient(160deg,var(--c2),#ffe3d3);border-radius:28px;padding:22px 14px 16px;margin:6px 0 14px;box-shadow:0 6px 18px #0000000f}
.hero h1{margin:4px 0;font-size:38px;line-height:1.15;color:var(--c)}
.hero .lead{margin:4px 0;font-size:19px;font-weight:700}
.hero .tip{margin:8px 0 0;font-size:14px;opacity:.8}
.key{font-size:54px;animation:bob 2.4s ease-in-out infinite;display:inline-block}
.qm{position:absolute;font-weight:900;color:var(--c);opacity:.18;font-size:70px;animation:float 6s ease-in-out infinite}
.q1{top:-6px;right:10px}.q2{bottom:-10px;left:16px;font-size:90px;animation-delay:-2s}.q3{top:30%;left:38%;font-size:40px;animation-delay:-4s}
@keyframes bob{50%{transform:translateY(-8px) rotate(-8deg)}}@keyframes float{50%{transform:translateY(-12px) rotate(12deg)}}
.lvcards{display:grid;grid-template-columns:1fr;gap:8px;margin-bottom:14px}
.lvc{display:block;text-decoration:none;background:#fff;border-radius:22px;padding:10px 16px;border:3px solid transparent;box-shadow:0 3px 10px #0000000d}
.lvc b{display:block;font-size:18px;color:var(--c)}.lvc small{opacity:.75}
.lvc.on{border-color:var(--c);background:var(--c2)}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tile{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:2px;background:#fff;border-radius:24px;padding:14px 8px;min-height:118px;text-decoration:none;box-shadow:0 4px 14px #0000000f;border-bottom:5px solid var(--c);transition:transform .15s}
.tile:active{transform:scale(.97)}
.tile .te{font-size:36px}.tile b{font-size:16px;line-height:1.3}.tile small{font-size:12.5px;opacity:.7}
.tile.done{background:var(--c2)}.ck{position:absolute;top:8px;left:10px;background:var(--c);color:#fff;border-radius:50%;width:24px;height:24px;font-style:normal;font-weight:900;display:grid;place-items:center;font-size:14px}
.sh{font-size:18px;margin:18px 0 8px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:0;border-radius:999px;background:#fff;padding:8px 14px;font:inherit;font-weight:800;font-size:17px;box-shadow:0 2px 8px #0000000f;cursor:pointer;min-height:44px}
.chip i{display:block;font-style:normal;font-weight:500;font-size:12px;opacity:.7;direction:ltr}
.back:focus{outline:none}.back:focus-visible{outline:3px solid var(--c)}.back{display:inline-block;margin:2px 0 8px;font-weight:800;color:var(--c);text-decoration:none;font-size:16px;padding:6px 0}
.ph{font-size:22px;margin:4px 0 10px;color:var(--c)}
.w{cursor:pointer;border-radius:6px;transition:background .2s}@media(hover:hover){.w:hover{background:#ffef9f}}.w.hl{background:#ffd84d}
.spk{border:0;background:var(--c2);border-radius:999px;font-size:17px;min-width:38px;min-height:38px;cursor:pointer;vertical-align:middle;margin-inline-start:4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:0;border-radius:999px;background:var(--c);color:#fff;font:inherit;font-weight:800;font-size:17px;padding:10px 20px;min-height:50px;cursor:pointer;text-decoration:none;box-shadow:0 3px 0 #0002}
.btn.alt{background:var(--coral)}.btn.ok{background:#22a06b}.btn.warn{background:#f08c2e}
.btn.ghost{background:#fff;color:var(--c);box-shadow:inset 0 0 0 2px var(--c)}
.btn.small{min-height:40px;font-size:15px;padding:6px 14px}.btn.big{font-size:21px;padding:12px 30px;min-height:58px}.btn.wide{width:100%;margin-top:12px}
.btn:disabled{opacity:.4}
.row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:12px 0}.row .btn{flex:1;min-width:130px}.row.small .btn{flex:0 1 auto;min-width:0}
.hint{text-align:center;font-size:14px;opacity:.75}
.inst{background:#fff;border-radius:18px;padding:10px 14px;font-weight:600;box-shadow:0 2px 8px #0000000a}
.panel{background:#fff;border-radius:24px;padding:14px;box-shadow:0 4px 14px #0000000f}.panel.center{text-align:center}
.prog{font-size:13px;font-weight:800;color:var(--c);text-align:left;direction:ltr}
.sent{font-size:23px;font-weight:800;text-align:center;margin:8px 0;line-height:1.6}
.answ{text-align:center;font-size:18px;background:var(--c2);border-radius:16px;padding:8px 12px;margin:6px 0}.answ.big{font-size:21px;font-weight:700}
mark{background:#ffd84d;border-radius:6px;padding:0 4px}
.blank{display:inline-block;min-width:74px;border-bottom:4px dashed var(--c);color:var(--c);padding:0 6px}.blank.full{border-bottom-style:solid;background:var(--c2);border-radius:8px 8px 0 0}
.opts{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:12px 0}.opts.col{flex-direction:column}
.opt{border:0;border-radius:999px;background:#f3eefc;background:var(--c2);color:var(--ink);font:inherit;font-weight:800;font-size:19px;padding:10px 20px;min-height:52px;cursor:pointer;transition:transform .12s,background .2s;box-shadow:0 2px 0 #0001}
.opt:active{transform:scale(.97)}.opt.ok{background:#bdf0d2!important;box-shadow:inset 0 0 0 3px #22a06b}.opt.no{background:#ffd9d2;opacity:.6}.opt.sel{box-shadow:inset 0 0 0 3px var(--c);background:#fff6c9}
.shake{animation:shake .4s}@keyframes shake{25%{transform:translateX(6px)}75%{transform:translateX(-6px)}}
.fb{min-height:26px;text-align:center;font-weight:700;margin-top:6px;border-radius:14px;padding:4px 8px}.fb.good{background:#e3f8ec;color:#11683f}.fb.bad{background:#fff1e6;color:#a4501c}
#mt .col{display:flex;flex-direction:column;gap:8px}#mt .opt{border-radius:22px;font-size:17px;text-align:right;padding:10px 16px}#mt .opt.q{background:#fff;box-shadow:inset 0 0 0 2px var(--c)}
#mt .sep{text-align:center;margin:6px 0}
.opt.m0.ok{background:#c9f2d9!important}.opt.m1.ok{background:#d6e7ff!important}.opt.m2.ok{background:#ffe7b8!important}.opt.m3.ok{background:#f3d9ff!important}.opt.m4.ok{background:#ffd6e5!important}.opt.m5.ok{background:#d9f7f4!important}
.line{min-height:62px;border:3px dashed var(--c);border-radius:20px;padding:8px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;background:var(--c2)}
.bank{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:12px 0;min-height:56px}
.bank .wt,.line .wt{display:inline-block;border:0;border-radius:999px;background:var(--sun);font:inherit;font-weight:800;font-size:20px;padding:8px 16px;cursor:pointer;box-shadow:0 3px 0 #0002;border-bottom:0}
.line .wt{background:#fff}.line .wt.ok{background:#bdf0d2}
.seg{display:flex;background:var(--c2);border-radius:999px;padding:4px;margin:8px 0}.seg button{flex:1;border:0;border-radius:999px;background:transparent;font:inherit;font-weight:800;padding:8px;min-height:44px}.seg button.on{background:#fff;color:var(--c);box-shadow:0 2px 6px #0001}
textarea{width:100%;font:inherit;font-size:17px;border-radius:16px;border:2px solid #ddd;padding:10px;margin-top:6px;background:#fffdf8}
textarea:focus{outline:none;border-color:var(--c)}
.play{display:flex;flex-direction:column;align-items:center;margin:8px auto;border:0;border-radius:50%;width:150px;height:150px;justify-content:center;background:radial-gradient(circle,#fff6c9,var(--sun));font-size:52px;cursor:pointer;box-shadow:0 6px 0 #0002;animation:pulse 2s infinite}
.play span{font-size:14px;font-weight:800}
@keyframes pulse{50%{transform:scale(1.04)}}
#rv{display:flex;margin:6px auto}.hide{display:none!important}
/* deck */
.deck{background:#fff;border-radius:28px;box-shadow:0 6px 18px #0000001a;overflow:hidden;display:flex;flex-direction:column;min-height:min(560px,calc(100vh - 200px))}
.deck:fullscreen{border-radius:0;min-height:100vh;background:var(--bg)}.deck.pseudo{position:fixed;inset:0;z-index:50;border-radius:0;background:var(--bg)}
.sbarw{height:7px;background:var(--c2)}#sbar{height:100%;background:var(--c);transition:width .3s}
.stage{flex:1;display:flex;align-items:center;justify-content:center;padding:16px}
.sl{text-align:center;width:100%;animation:pop .35s ease}
@keyframes pop{from{opacity:0;transform:scale(.94) translateY(10px)}}
.sem{font-size:76px;line-height:1.1;animation:bob 3s ease-in-out infinite;display:inline-block}
.scat{display:inline-block;background:var(--c);color:#fff;border-radius:999px;padding:2px 14px;font-weight:800;font-size:15px;margin:4px 0}
.sbig{font-size:40px;font-weight:900;color:var(--c);line-height:1.3;margin:6px 0}
.deck:fullscreen .sbig,.deck.pseudo .sbig{font-size:64px}.deck:fullscreen .sem{font-size:120px}.deck:fullscreen .ssub,.deck:fullscreen .sex{font-size:30px}
.ssub{font-size:20px;font-weight:600;margin:8px 0}
.sex{font-size:20px;background:var(--c2);border-radius:20px;padding:10px 12px;margin-top:10px;line-height:1.8}.sex .ans{color:#a4501c;font-weight:700}
.tr{direction:ltr;font-size:15px;font-weight:700;color:#6b5a85;background:#f6f1ff;border-radius:999px;display:inline-block;padding:2px 12px;margin:2px 0}
.dctl{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px;border-top:2px solid var(--c2)}
.dctl .btn{min-width:64px;font-size:24px}#scount,#wcnt{font-weight:800;direction:ltr;unicode-bidi:isolate}
.guess{display:flex;flex-direction:column;gap:10px;margin-top:10px}.gq{border:0;border-radius:20px;background:var(--c2);font:inherit;font-size:19px;font-weight:700;padding:10px;min-height:54px;cursor:pointer}.gq b{display:none;color:var(--c);font-size:22px}.gq.on b{display:block}
/* flip cards */
.piles{display:flex;justify-content:center;gap:8px;margin-bottom:10px}.piles span{background:#fff;border-radius:999px;padding:4px 14px;font-weight:800;box-shadow:0 2px 6px #0000000f}
.fcwrap{display:flex;justify-content:center}
.flip{width:100%;max-width:400px;height:400px;perspective:1100px;cursor:pointer;outline:none}
.flip .inner{position:relative;width:100%;height:100%;transition:transform .7s cubic-bezier(.3,1.4,.5,1);transform-style:preserve-3d}
.flip.on .inner{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:30px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:18px;text-align:center;box-shadow:0 10px 24px #0002}
.front{background:linear-gradient(150deg,#fff,var(--c2));border:5px solid var(--c)}
.front small{opacity:.6;margin-top:10px}
.fback{background:linear-gradient(150deg,#fff8e1,#ffe3d3);transform:rotateY(180deg);border:5px solid var(--coral);gap:6px}
.fem{font-size:84px;line-height:1.1}.fw{font-size:44px;font-weight:900;color:var(--c);line-height:1.25}
.bcat{font-weight:900;color:#a4501c;font-size:18px}.bm{font-size:18px;font-weight:700;margin:2px 0}.bq{font-size:19px;font-weight:800;color:var(--c)}.ba{font-size:18px;background:#fff;border-radius:14px;padding:4px 10px}
.fdone{text-align:center;background:#fff;border-radius:30px;padding:24px;width:100%}
.win{text-align:center;padding:10px}.win b{font-size:22px;display:block}
/* wheel */
.wheel{position:relative;width:300px;max-width:88vw;margin:8px auto;overflow:hidden;padding-top:22px}
.wsvg{width:100%;display:block;transition:transform 3.1s cubic-bezier(.17,.67,.12,1);filter:drop-shadow(0 6px 10px #0002)}
.ptr{position:absolute;top:-4px;left:50%;transform:translateX(-50%);font-size:30px;color:var(--ink);z-index:2}
.wcard{background:#fff;border-radius:26px;padding:14px;text-align:center;box-shadow:0 4px 14px #0000001a;border:4px solid var(--c);animation:pop .4s}
.ivq{font-size:21px;font-weight:800;margin:8px 0}.steps{text-align:right;font-weight:600}
.spinning{text-align:center;font-size:30px}
.nl{display:block;margin-top:14px;font-weight:700}
/* quiz */
.qtop{display:flex;justify-content:space-between;font-size:22px;font-weight:800}.tbar{height:12px;border-radius:99px;background:var(--c2);overflow:hidden;margin:6px 0 10px}#tb{height:100%;width:100%;background:linear-gradient(90deg,var(--coral),var(--sun));transition:width 1s linear}
.qwb{color:var(--c);font-size:28px}
/* read */
.story{background:#fffdf5;border-radius:24px;padding:14px 16px;box-shadow:0 4px 14px #0000000f;margin-bottom:12px;border-right:7px solid var(--sun)}
.story h3{margin:0 0 6px;color:var(--c)}.story p{font-size:19px;line-height:1.9;margin:0}
.rqi{border-bottom:2px dashed #eee;padding:10px 0}.rqq{font-weight:800;font-size:18px}.model{background:#e3f8ec;border-radius:14px;padding:8px 12px;margin-top:6px}
.gnoun{text-align:center;margin:10px 0}.gnoun>span{font-size:70px;display:block}.gnoun b{font-size:32px}
/* teacher */
.note{background:#fff6c9;border-radius:16px;padding:8px 12px;font-weight:700;font-size:15px}
.tnav{display:flex;gap:6px;margin:8px 0}.pill{flex:1;text-align:center;text-decoration:none;font-weight:800;border-radius:999px;padding:8px;background:#fff;box-shadow:0 2px 6px #0000000f}.pill.on{background:var(--c);color:#fff}
details{background:#fff;border-radius:20px;padding:4px 14px;margin:10px 0;box-shadow:0 3px 10px #0000000d}
summary{font-weight:900;font-size:18px;padding:10px 0;cursor:pointer;color:var(--c)}
.tl{list-style:none;padding:0;margin:0}.tl li{position:relative;padding:8px 54px 8px 0;border-right:3px solid var(--c2);margin-right:20px}
.mins{position:absolute;right:-22px;top:8px;background:var(--c);color:#fff;border-radius:999px;font-weight:900;font-size:14px;width:40px;height:40px;display:grid;place-items:center}
.tl p{margin:2px 0 0}.ol3d li{margin-bottom:10px}.ol3d p{margin:2px 0}.small{font-size:14px}
h4{margin:12px 0 4px;color:#a4501c}
.foot{display:flex;align-items:center;justify-content:center;gap:10px;padding:16px;font-weight:800;color:#6b3c1d;background:#fff1e0}.foot img{border-radius:50%}
.toast{position:fixed;bottom:18px;left:50%;transform:translate(-50%,120px);background:var(--ink);color:#fff;border-radius:999px;padding:10px 20px;font-weight:700;transition:transform .3s,opacity .3s;opacity:0;z-index:99;max-width:92vw;text-align:center}.toast.on{transform:translate(-50%,0);opacity:1}
@media(min-width:620px){.lvl{flex:0 1 auto}.trsel{flex:0 1 210px}.lvcards{grid-template-columns:repeat(3,1fr)}.grid{grid-template-columns:repeat(3,1fr)}.acts{grid-template-columns:repeat(3,1fr)}}
@media print{@page{size:A4;margin:15mm}body{background:#fff;font-size:12pt;display:block}.top,.toast,.back,.tnav,.btn,.spk,.note{display:none!important}main{max-width:none;padding:0}details{box-shadow:none;border:1px solid #ccc;break-inside:avoid-page}details>*{display:block}summary{color:#000}*{text-align:right}.foot{background:none}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}