:root{
  --bg:#FFF6E6; --ink:#1F2A5C; --muted:#9A93A8; --paper:#fff;
  --orange:#E8553A; --yellow:#FFC93C; --green:#2FB67A; --blue:#3E86E0; --purple:#7A5CE0; --pink:#FF7FB0;
  --accent:var(--orange);
  --font: ui-rounded, "SF Pro Rounded", "Arial Rounded MT Bold", "Nunito", "PingFang SC", system-ui, sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-user-select:none;user-select:none;touch-action:manipulation}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;padding:0}
.zh{color:var(--muted);font-weight:500;font-family:"PingFang SC",system-ui,sans-serif}
#rotate{display:none;position:fixed;inset:0;background:var(--bg);z-index:999;place-items:center;text-align:center;font-size:64px}
#rotate p{font-size:22px;margin:12px 0 0}
@media (orientation:portrait) and (max-width:1100px){#rotate{display:grid}}

/* ---------- top bar ---------- */
.bar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:16px;padding:14px 22px;padding-top:max(14px,env(safe-area-inset-top));background:linear-gradient(var(--bg) 80%,transparent)}
.bar h1{flex:1;margin:0;font-size:30px;font-weight:800;letter-spacing:.2px}
.logo{font-size:38px}
.round{width:60px;height:60px;border-radius:50%;background:#fff;box-shadow:0 4px 0 #E9DCC3;font-size:38px;line-height:1;font-weight:800;color:var(--ink);display:grid;place-items:center;flex:none}
.round:active{transform:translateY(3px);box-shadow:0 1px 0 #E9DCC3}
.round.ghost{font-size:26px;opacity:.45;box-shadow:none;background:transparent}
.score{display:flex;align-items:center;gap:12px;background:#fff;border-radius:40px;padding:8px 20px;box-shadow:0 4px 0 #E9DCC3;font-weight:800;flex:none;transition:transform .2s}
.score.bump{transform:scale(1.18)}
.s-today{font-size:28px;color:#E08A00}
.s-total{font-size:17px;color:var(--muted)}

/* ---------- maps ---------- */
.view-map{min-height:100vh;background:
  radial-gradient(circle at 12% 18%,#FFE3B8 0 90px,transparent 91px),
  radial-gradient(circle at 88% 40%,#D9F3E6 0 120px,transparent 121px),
  radial-gradient(circle at 20% 78%,#DCE9FB 0 110px,transparent 111px),var(--bg);background-attachment:fixed}
.map{position:relative;max-width:1000px;margin:0 auto}
.path{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.path polyline{fill:none;stroke:#F3B562;stroke-width:14;stroke-linecap:round;stroke-linejoin:round;opacity:.75}
.node{position:absolute;transform:translate(-50%,-50%);width:150px;text-align:center}
.disc{position:relative;width:130px;height:130px;border-radius:50%;background:var(--c,var(--purple));box-shadow:0 8px 0 rgba(0,0,0,.18), inset 0 -10px 0 rgba(0,0,0,.08);display:grid;place-items:center;transition:transform .12s}
.disc:active{transform:translateY(5px) scale(.97)}
.disc .ic{font-size:58px;filter:drop-shadow(0 2px 0 rgba(0,0,0,.15))}
.node.level{--c:var(--purple)} .node.words{--c:var(--purple)} .node.practise{--c:var(--orange)} .node.real{--c:var(--green)}
.node:nth-child(3n).level{--c:var(--blue)} .node:nth-child(3n+1).level{--c:var(--orange)}
.node.locked .disc{background:#D9D2C4;box-shadow:0 8px 0 #C4BBAA} .node.locked .disc .ic{font-size:40px;opacity:.6} .node.locked .lab{opacity:.45}
.node.done .disc{outline:6px solid var(--yellow);outline-offset:3px}
.tickstar{position:absolute;right:-6px;top:-10px;font-size:44px;color:var(--yellow);-webkit-text-stroke:2px #C98A00}
.prog{position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);background:#fff;border-radius:20px;padding:2px 10px;font-size:15px;font-weight:800;color:var(--ink);box-shadow:0 2px 0 rgba(0,0,0,.12)}
.lab{margin-top:14px;line-height:1.15} .lab b{display:block;font-size:22px;font-weight:800} .lab span{display:block;font-size:17px;font-weight:700;opacity:.7}
.info{position:absolute;left:-2px;top:-6px;width:26px;height:26px;border-radius:50%;background:#fff;color:var(--muted);font-weight:800;font-size:15px;box-shadow:0 2px 0 rgba(0,0,0,.12);opacity:.75}
.flag{position:absolute;left:50%;top:138px;width:7px;height:7px;margin-left:-3.5px;border-radius:50%;background:#B9B1C6}
.note{position:absolute;left:50%;top:-58px;transform:translateX(-50%);white-space:nowrap;background:var(--ink);color:#fff;border-radius:14px;padding:8px 14px;font-size:15px;z-index:5;line-height:1.35}
.note b{display:block} .note span{opacity:.75;font-size:13px}
.wig{animation:wig .4s}
@keyframes wig{25%{transform:translate(-50%,-50%) rotate(-5deg)}75%{transform:translate(-50%,-50%) rotate(5deg)}}

/* ---------- run view ---------- */
.view-run{min-height:100vh;display:flex;flex-direction:column}
.k-words{--accent:var(--purple)} .k-practise{--accent:var(--orange)} .k-real{--accent:var(--green)}
.view-run{background:linear-gradient(color-mix(in srgb,var(--accent) 16%,var(--bg)),var(--bg) 240px)}
.dots{flex:1;display:flex;gap:7px;justify-content:center;flex-wrap:wrap}
.dot{position:relative;width:28px;height:28px;border-radius:50%;background:#fff;box-shadow:inset 0 0 0 3px #E9DCC3;font-size:22px;line-height:28px;color:var(--yellow);-webkit-text-stroke:1px #C98A00}
.dot.ok{background:transparent;box-shadow:none}
.dot.now{box-shadow:inset 0 0 0 4px var(--accent);transform:scale(1.15)}
.dot.p::after{content:"";position:absolute;left:50%;bottom:-7px;width:4px;height:4px;margin-left:-2px;border-radius:50%;background:#B9B1C6}
#stage{flex:1;display:flex;flex-direction:column;align-items:center;padding:6px 40px 110px;gap:18px;position:relative}
#stage.nudge{animation:nudge .35s}
@keyframes nudge{30%{transform:translateX(-10px)}70%{transform:translateX(10px)}}

.stem{text-align:center;max-width:1100px}
.stem h2{margin:0;font-size:46px;font-weight:800;line-height:1.2;display:flex;gap:16px;align-items:center;justify-content:center;flex-wrap:wrap}
.stem .zh{margin:6px 0 0;font-size:20px}
.w{border-radius:8px;padding:0 2px} .w:active{background:var(--yellow)}
.play{width:56px;height:56px;flex:none;border-radius:50%;background:var(--accent);color:#fff;font-size:24px;padding-left:4px;box-shadow:0 5px 0 rgba(0,0,0,.2);display:inline-grid;place-items:center}
.play.sm{width:42px;height:42px;font-size:18px;box-shadow:0 4px 0 rgba(0,0,0,.18)}
.play:active{transform:translateY(4px);box-shadow:0 1px 0 rgba(0,0,0,.2)}
.work{flex:1;display:flex;align-items:center;justify-content:center;gap:50px;width:100%;min-height:230px}
.work.pulse{animation:pulse .9s 2}
@keyframes pulse{50%{transform:scale(1.06)}}

/* ten frame */
.frame{display:grid;grid-template-columns:repeat(5,92px);grid-template-rows:repeat(2,92px);border:5px solid var(--ink);border-radius:10px;background:#fff;overflow:hidden}
.cell{border:2.5px solid var(--ink);display:grid;place-items:center}
.frame.tapme .cell{cursor:pointer} .frame.tapme .cell:active{background:#FFF1C9}
.ctr{display:block;width:66px;height:66px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#FF8C78,var(--orange) 60%);box-shadow:inset 0 -5px 0 rgba(0,0,0,.14);animation:pop .25s}
.ctr.y{background:radial-gradient(circle at 35% 30%,#FFE58A,#F5B800 60%)}
.em{font-size:60px;line-height:1;display:inline-block}
.hop{animation:hop .4s}
@keyframes hop{50%{transform:translateY(-16px) scale(1.2)}}
@keyframes pop{from{transform:scale(.3)}}
.loose{display:flex;gap:16px}
.scatter{position:relative;width:520px;height:250px} .scatter .em{position:absolute;font-size:64px}
.tally,.tl{font-size:40px;font-weight:800;color:var(--accent);min-width:60px;text-align:center}
.two{gap:70px} .fwrap{display:flex;flex-direction:column;align-items:center;gap:8px}
.two .frame{grid-template-columns:repeat(5,80px);grid-template-rows:repeat(2,80px)} .two .ctr{width:58px;height:58px}

/* number sentence + pad */
.sent{font-size:40px;font-weight:800;display:flex;align-items:center;gap:14px}
.slot{display:inline-grid;place-items:center;width:84px;height:84px;border:5px solid var(--ink);border-radius:16px;background:#fff;font-size:52px}
.slot.right{border-color:var(--green);background:#E3F8EE;animation:pop .3s}
.slot.bounce,.opt.bounce{animation:bounce .5s}
@keyframes bounce{20%{transform:translateY(-8px)}50%{transform:translateY(4px)}80%{transform:translateY(-3px)}}
.pad{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.pad button{width:84px;height:84px;border-radius:22px;background:#fff;font-size:42px;font-weight:800;box-shadow:0 6px 0 #E3D5BA}
.pad button:active{transform:translateY(5px);box-shadow:0 1px 0 #E3D5BA;background:#FFF1C9}

/* done + hint */
.donebtn{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);width:170px;height:84px;border-radius:44px;background:var(--green);color:#fff;font-size:50px;font-weight:800;box-shadow:0 8px 0 #1D8A5A}
.donebtn:active{transform:translateX(-50%) translateY(6px);box-shadow:0 2px 0 #1D8A5A}
.bulb{position:fixed;right:26px;bottom:26px;width:84px;height:84px;border-radius:50%;background:var(--yellow);font-size:44px;box-shadow:0 7px 0 #D9A200;z-index:15}
.bulb small{position:absolute;right:8px;top:4px;font-size:22px;font-weight:800;color:var(--ink)}
.bulb:active{transform:translateY(5px);box-shadow:0 2px 0 #D9A200}
.hintbox{position:fixed;right:22px;top:150px;max-width:330px;background:#fff;border:4px solid var(--yellow);border-radius:22px;padding:14px 20px;z-index:15;box-shadow:0 8px 24px rgba(0,0,0,.12)}
.hintbox .en{margin:0;font-size:26px;font-weight:700;line-height:1.3} .hintbox .zh{margin:6px 0 0;font-size:16px}

/* pick */
.picks{flex-direction:column;gap:26px} .grp{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;max-width:900px}
.it{width:96px;height:96px;border-radius:50%;display:grid;place-items:center;border:5px dashed transparent;transition:transform .1s}
.it svg{width:76px;height:70px} .it polygon{fill:#fff;stroke:var(--ink);stroke-width:5;stroke-linejoin:round}
.it:active{transform:scale(.92)}
.circle .it.on{border:6px solid var(--orange);background:#FFE9E3;animation:pop .2s}
.colour .it.on polygon{fill:var(--blue)} .colour .it.on{animation:pop .2s}

/* sort */
.pile{min-height:120px;display:flex;gap:18px;flex-wrap:wrap;justify-content:center;align-items:center;padding:10px 30px;width:100%}
.drag{touch-action:none;cursor:grab;font-size:72px;transition:transform .1s} .drag.lift{transform:scale(1.25);filter:drop-shadow(0 10px 8px rgba(0,0,0,.25))}
.rings{display:flex;gap:60px;flex:1;align-items:center}
.ring{width:390px;min-height:230px;border:7px dashed var(--accent);border-radius:50% / 46%;background:rgba(255,255,255,.7);display:flex;flex-wrap:wrap;gap:6px;align-items:center;justify-content:center;padding:26px 44px}
.ring .drag{font-size:58px}

/* find */
.opts{flex:1;display:flex;gap:34px;align-items:center;justify-content:center;width:100%}
.opt{width:350px;height:290px;background:#fff;border-radius:34px;box-shadow:0 9px 0 #E3D5BA;display:grid;place-items:center;padding:14px;border:6px solid transparent}
.opt:active{transform:translateY(6px);box-shadow:0 3px 0 #E3D5BA}
.opt.right{border-color:var(--green);background:#E3F8EE;animation:pop .3s}
.opt .frame{grid-template-columns:repeat(5,54px);grid-template-rows:repeat(2,54px);border-width:4px} .opt .ctr{width:38px;height:38px} .opt .cell{border-width:2px}
.opt .loose{flex-wrap:wrap;justify-content:center;gap:10px} .opt .loose .ctr{width:50px;height:50px}

/* art for cards */
.bignum{font-size:130px;font-weight:800;line-height:1;color:var(--ink)} .bignum.word{font-size:84px;color:var(--purple)}
.pair{display:flex;align-items:center;gap:30px} .pair em{font-style:normal;font-size:60px;color:var(--muted)}
.track{display:flex;border:5px solid var(--ink);border-radius:10px;overflow:hidden;background:#fff}
.track div{width:86px;height:86px;display:grid;place-items:center;font-size:46px;font-weight:800;border-right:4px solid var(--ink)} .track div:last-child{border:0}
.track .q{background:#FFF1C9;color:var(--orange)}
.opt .track div{width:66px;height:66px;font-size:34px}
.nline{display:flex;align-items:flex-start;padding-top:10px}
.tick{position:relative;width:62px;text-align:center;font-size:26px;font-weight:800}
.tick b{display:block;height:26px;border-left:4px solid var(--ink);margin-left:29px} .tick::before{content:"";position:absolute;left:0;right:0;top:11px;border-top:4px solid var(--ink)}
.tick:first-child::before{left:50%} .tick:last-child::before{right:50%}
.tick span{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:50%;margin-top:4px}
.tick.mark span{box-shadow:0 0 0 5px var(--orange);background:#FFE9E3} .tick.from span{background:#DCE9FB}
.nline.mini .tick{width:27px;font-size:13px} .nline.mini .tick b{margin-left:12px;height:18px;border-left-width:3px} .nline.mini .tick span{width:24px;height:24px} .nline.mini .tick::before{top:8px;border-top-width:3px}
.rows{display:flex;flex-direction:column;gap:12px} .rows div{display:flex;align-items:center;gap:18px;padding:6px 18px;border-radius:18px;font-size:46px;border:5px solid transparent}
.rows b{font-size:44px} .rows .hi{border-color:var(--orange);background:#FFE9E3}
.nums{display:flex;gap:24px} .nums div{width:120px;height:120px;border-radius:26px;background:#fff;display:grid;place-items:center;font-size:74px;font-weight:800;border:6px solid #E9DCC3}
.nums .hi{border-color:var(--orange);background:#FFE9E3;transform:scale(1.12)}
.emoji{font-size:84px;letter-spacing:10px} .setring{border:7px dashed var(--purple);border-radius:50%;padding:30px 50px} .setring .emoji{font-size:64px;letter-spacing:4px}

/* word card */
.wordcard{position:relative;width:min(980px,94vw);background:#fff;border-radius:40px;box-shadow:0 12px 0 #E9DCC3;padding:26px 40px 28px;display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center}
.tag{position:absolute;left:28px;top:-16px;background:var(--accent);color:#fff;font-weight:800;border-radius:20px;padding:6px 18px;font-size:18px}
.pic{min-height:210px;display:grid;place-items:center}
.term{display:flex;align-items:center;gap:18px;font-size:68px;font-weight:800;color:var(--accent)}
.wordcard .zh{margin:0;font-size:20px}
.eg{margin-top:12px;display:flex;align-items:center;gap:14px;font-size:36px;font-weight:700}
.saidit{margin-top:16px;background:var(--green);color:#fff;font-size:32px;font-weight:800;border-radius:44px;padding:14px 38px;box-shadow:0 8px 0 #1D8A5A;white-space:nowrap}
.saidit b{margin-left:8px} .saidit:active{transform:translateY(6px);box-shadow:0 2px 0 #1D8A5A}

/* parent-led screens */
.teach{width:min(1200px,96vw);background:#fff;border-radius:36px;box-shadow:0 12px 0 #E9DCC3;padding:22px 34px;display:flex;flex-direction:column;gap:12px}
.thead{display:flex;align-items:baseline;gap:18px;flex-wrap:wrap} .thead h2{margin:0;font-size:34px;color:var(--accent)} .thead .zh{font-size:17px}
.teach .en{margin:0;font-size:33px;font-weight:800;line-height:1.25} .teach .zh{margin:2px 0 0;font-size:17px}
.lsteps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px 26px;counter-reset:s}
.lsteps li,.tq,.think,.stemline{display:flex;align-items:center;gap:16px;padding:8px 14px;border-radius:20px;border:4px solid transparent}
.lsteps li{background:#F7F3EA} .lsteps li.heard{opacity:.6} .lsteps li.now{opacity:1;border-color:var(--accent);background:#EAF8F1}
.think{background:#FFF4D6} .think .en{font-size:25px}
.stems{display:grid;grid-template-columns:1fr 1fr;gap:10px} .stemline{background:#F1EDFC} .stemline .en{font-size:27px}
.chip{display:inline-block;background:var(--purple);color:#fff;border-radius:16px;padding:0 12px;font-size:21px;margin-left:6px}
.tfoot{display:flex;align-items:center;justify-content:space-between;gap:20px} .tfoot .saidit{margin:0}
.btnarea{display:flex;align-items:center;gap:22px}
.btns{flex:1;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:center;min-height:96px}
.btns.grouped{gap:34px} .btns .g{display:flex;gap:8px;align-items:center;padding:8px 14px;border:4px dashed #D9D2C4;border-radius:40px}
.bt{display:grid;place-items:center;border-radius:50%;box-shadow:inset 0 -5px 0 rgba(0,0,0,.18), inset 0 0 0 5px rgba(255,255,255,.3)}
.bt.big{width:74px;height:74px} .bt.sm{width:48px;height:48px}
.bt u{width:38%;height:38%;border-radius:50%;background:radial-gradient(circle,rgba(0,0,0,.4) 0 22%,transparent 24%) 0 0/50% 50%}
.sorters{display:flex;flex-direction:column;gap:8px} .sorters button{background:#F1EDFC;border-radius:18px;padding:6px 18px;font-weight:800;font-size:20px;color:var(--purple)}

/* end + rewards */
.endcard{margin:auto;text-align:center} .burst{font-size:120px;animation:pop .5s} .endcard h2{font-size:34px;margin:0;opacity:.6} .endcard .big{font-size:64px;font-weight:800;margin:6px 0}
.stars{font-size:40px;color:var(--yellow);-webkit-text-stroke:1.5px #C98A00;letter-spacing:4px;max-width:800px}
.go{margin-top:22px;width:130px;height:130px;border-radius:50%;background:#fff;color:var(--green);font-size:66px;padding-left:10px;box-shadow:0 9px 0 #E3D5BA}
.fly{position:fixed;z-index:80;font-size:64px;font-weight:800;color:#E08A00;transition:transform .7s cubic-bezier(.5,0,.3,1),opacity .7s;pointer-events:none;text-shadow:0 3px 0 #fff}
.confetti{position:fixed;left:50%;top:55%;z-index:70;pointer-events:none}
.confetti i{position:absolute;width:14px;height:20px;border-radius:4px;animation:conf 1.1s ease-out forwards}
@keyframes conf{to{transform:translate(var(--x),var(--y)) rotate(var(--r));opacity:0}}

/* word popup + settings */
.pop{position:fixed;z-index:90;background:var(--ink);color:#fff;border-radius:16px;padding:10px 16px;max-width:340px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.pop b{display:block;font-size:24px} .pop span{display:block;font-size:17px;opacity:.85;font-family:"PingFang SC",system-ui,sans-serif}
.sheet{position:fixed;inset:0;background:rgba(31,42,92,.45);z-index:100;display:grid;place-items:center}
.sheet .card{width:min(720px,92vw);background:#fff;border-radius:28px;padding:26px 30px;font-family:"PingFang SC",system-ui,sans-serif;-webkit-user-select:text;user-select:text}
.sheet h2{margin:0 0 14px} .sheet small{color:var(--muted);font-weight:500}
.sheet label{display:block;font-size:16px;color:var(--muted)} .sheet input{display:block;font:inherit;font-size:20px;padding:8px 12px;border:2px solid #E9DCC3;border-radius:12px;margin-top:6px;width:100%;color:var(--ink)}
.rowx{display:flex;align-items:center;gap:12px;margin-top:16px;font-size:17px} .rowx input{width:120px;margin:0} .rowx.end{justify-content:space-between;margin-top:24px}
.rowx button{background:#F1EDFC;color:var(--purple);border-radius:14px;padding:10px 20px;font-weight:700} .rowx .primary{background:var(--green);color:#fff} .rowx .danger{background:none;color:#C0392B;font-weight:500;font-size:15px}
.link{color:var(--blue);font-weight:700;text-decoration:none} .mark-help{color:var(--muted);font-size:15px;line-height:1.5}

/* shorter screens (11-inch iPad, laptops) */
@media (max-height:860px){
  .stem h2{font-size:38px} .frame{grid-template-columns:repeat(5,76px);grid-template-rows:repeat(2,76px)} .ctr{width:54px;height:54px} .em{font-size:50px}
  .pad button,.slot{width:70px;height:70px;font-size:36px} .sent{font-size:34px} .work{min-height:180px} .scatter{height:210px}
  .pic{min-height:170px} .term{font-size:56px} .eg{font-size:30px} .opt{height:240px;width:310px} .ring{min-height:190px;width:340px}
  .teach .en{font-size:28px} .bt.big{width:60px;height:60px} .bt.sm{width:40px;height:40px} #stage{gap:12px}
}