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<!DOCTYPE html>
<html lang="gu">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no">
<title>Yuval's Lab ๐ฌ</title>
<link href="https://fonts.googleapis.com/css2?family=Fredoka+One&family=Baloo+2:wght@700;800&family=Noto+Sans+Gujarati:wght@400;700;800&family=Nunito:wght@700;800&display=swap" rel="stylesheet">
<style>
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
CSS VARIABLES
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
:root{
--bg:#0d1117;--card:#161b22;--card2:#1f2937;
--border:rgba(255,255,255,0.07);
--text:#f0f6fc;--muted:#8b949e;
--blue:#58a6ff;--green:#3fb950;--yellow:#f0c040;
--red:#f85149;--purple:#bc8cff;--orange:#ffa657;--teal:#39d0d8;
--font-gu:'Noto Sans Gujarati',sans-serif;
--font-num:'Fredoka One',cursive;
--font-en:'Nunito',sans-serif;
--fs:1;
}
html{font-size:calc(16px * var(--fs))}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}
html,body{height:100%;overflow:hidden;background:var(--bg);color:var(--text)}
body{font-family:var(--font-gu),sans-serif;display:flex;flex-direction:column}
/* โโ SCREEN BASE โโ */
.screen{flex:1;overflow-y:auto;display:none;padding:0 0 90px}
.screen.active{display:block}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
TOPBAR
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.topbar{display:flex;align-items:center;padding:10px 14px;background:var(--card);border-bottom:1px solid var(--border);gap:10px;flex-shrink:0;z-index:50}
.logo{font-family:var(--font-num),cursive;font-size:1.1rem;color:var(--blue);cursor:pointer;flex-shrink:0}
.logo span{font-size:.6rem;display:block;color:var(--muted);letter-spacing:1px;font-family:var(--font-en),sans-serif}
.xp-col{flex:1;margin:0 8px}
.xp-track{background:rgba(255,255,255,.07);border-radius:50px;height:7px;overflow:hidden}
.xp-fill{height:100%;background:linear-gradient(90deg,var(--blue),var(--purple));border-radius:50px;transition:width .7s cubic-bezier(.34,1.56,.64,1)}
.xp-row{display:flex;justify-content:space-between;font-size:.62rem;color:var(--muted);font-weight:700;font-family:var(--font-en),sans-serif;margin-top:2px}
.streak-badge{font-size:.82rem;font-weight:800;color:var(--orange);font-family:var(--font-en),sans-serif;flex-shrink:0}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
HOME
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.welcome-strip{background:linear-gradient(135deg,rgba(88,166,255,.1),rgba(188,140,255,.08));border-bottom:1px solid var(--border);padding:14px 16px;display:flex;align-items:center;gap:12px}
.welcome-avatar{font-size:2rem}
.welcome-gu{font-size:.95rem;font-weight:700}
.welcome-en{font-size:.7rem;color:var(--muted);font-family:var(--font-en),sans-serif}
.name-btn{margin-left:auto;background:rgba(255,255,255,.06);border:1px solid var(--border);border-radius:8px;padding:5px 10px;color:var(--muted);font-size:.68rem;cursor:pointer;font-family:var(--font-en),sans-serif;white-space:nowrap}
.trophy-shelf{background:var(--card);border-radius:16px;padding:12px 16px;margin:12px 14px 0;border:1px solid var(--border)}
.trophy-head{font-size:.65rem;letter-spacing:1.5px;text-transform:uppercase;color:var(--yellow);font-weight:800;font-family:var(--font-en),sans-serif;margin-bottom:8px}
.trophy-row{display:flex;flex-wrap:wrap;gap:8px}
.trophy-item{font-size:1.5rem;opacity:.25;transition:opacity .3s}
.trophy-item.earned{opacity:1}
.section-wrap{padding:0 14px 4px}
.section-head{display:flex;align-items:center;gap:8px;padding:14px 0 8px}
.section-icon{font-size:1.4rem}
.section-name-gu{font-size:1rem;font-weight:800}
.section-name-en{font-family:var(--font-num),cursive;font-size:.7rem;opacity:.4;margin-left:2px}
.section-line{flex:1;height:1px;background:var(--border)}
.section-progress{font-size:.65rem;color:var(--muted);font-family:var(--font-en),sans-serif;font-weight:800}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
CATEGORY CARDS
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.cat-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:6px}
.cat-card{background:var(--card);border:2px solid var(--border);border-radius:18px;padding:14px 10px 12px;text-align:center;cursor:pointer;position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;transition:transform .18s,box-shadow .18s,border-color .18s}
.cat-card:active{transform:scale(.94)}
.cat-card.locked{opacity:.4;cursor:not-allowed}
.cat-icon{font-size:1.9rem;line-height:1}
.cat-name-gu{font-size:.82rem;font-weight:800;line-height:1.3}
.cat-name-en{font-family:var(--font-num),cursive;font-size:.6rem;opacity:.4}
.cat-prog-bar{height:3px;background:rgba(255,255,255,.08);border-radius:4px;width:100%;margin:4px 0 2px;overflow:hidden}
.cat-prog-fill{height:100%;border-radius:4px;transition:width .5s ease}
.cat-prog-label{font-size:.58rem;color:var(--muted);font-family:var(--font-en),sans-serif}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
CHALLENGE LIST
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
#challengeScreen{padding:0 14px 90px}
.ch-header{padding:14px 0;border-bottom:1px solid var(--border);margin-bottom:14px}
.ch-back{background:none;border:none;color:var(--muted);font-size:.8rem;cursor:pointer;padding:0;font-family:var(--font-en),sans-serif;display:flex;align-items:center;gap:4px;margin-bottom:10px}
.ch-title-gu{font-size:1.2rem;font-weight:800}
.ch-title-en{font-family:var(--font-num),cursive;font-size:.75rem;opacity:.4}
.ch-card{background:var(--card);border:2px solid var(--border);border-radius:18px;padding:16px;margin-bottom:10px;display:flex;align-items:center;gap:14px;cursor:pointer;transition:border-color .18s,transform .18s;position:relative}
.ch-card:active{transform:scale(.97)}
.ch-card.locked{opacity:.4;cursor:not-allowed}
.ch-num{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-family:var(--font-num),cursive;font-size:1.1rem;flex-shrink:0}
.ch-info{flex:1}
.ch-name-gu{font-size:.9rem;font-weight:800;margin-bottom:2px}
.ch-name-en{font-family:var(--font-en),sans-serif;font-size:.65rem;color:var(--muted)}
.ch-stars{font-size:.85rem;letter-spacing:1px}
.ch-xp{font-family:var(--font-num),cursive;font-size:.8rem;color:var(--yellow);margin-top:2px}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
GAME SCREEN
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
#gameScreen{display:none;flex-direction:column;overflow:hidden}
#gameScreen.active{display:flex}
.g-header{display:flex;align-items:center;padding:10px 14px;background:var(--card);border-bottom:1px solid var(--border);gap:10px;flex-shrink:0}
.g-back{background:rgba(255,255,255,.07);border:none;color:var(--text);width:36px;height:36px;border-radius:10px;cursor:pointer;font-size:1.1rem;display:flex;align-items:center;justify-content:center}
.g-titles{flex:1}
.g-title-gu{font-size:.9rem;font-weight:800}
.g-title-en{font-family:var(--font-en),sans-serif;font-size:.62rem;opacity:.4}
.g-dots{display:flex;gap:4px}
.gdot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.1);transition:background .3s}
.gdot.done{background:var(--green)}
.gdot.cur{background:var(--yellow);box-shadow:0 0 6px var(--yellow)}
.g-body{flex:1;overflow-y:auto;padding:16px 14px 100px;display:flex;flex-direction:column;align-items:center}
.q-card{background:var(--card);border:1px solid var(--border);border-radius:22px;padding:20px 16px;width:100%;max-width:560px;margin-bottom:14px;animation:fadeUp .35s cubic-bezier(.34,1.56,.64,1)}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px) scale(.97)}to{opacity:1;transform:none}}
.ql{font-size:.58rem;letter-spacing:2px;text-transform:uppercase;font-weight:800;font-family:var(--font-en),sans-serif;opacity:.5;margin-bottom:8px}
.qt-gu{font-size:1.2rem;font-weight:700;line-height:1.7;margin-bottom:3px}
.qt-en{font-family:var(--font-en),sans-serif;font-size:.88rem;color:var(--muted);margin-bottom:14px;line-height:1.5}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
QUESTION TYPES
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
/* shared visual box */
.vis-box{background:var(--card2);border:2px solid var(--border);border-radius:16px;padding:12px 14px;display:flex;flex-wrap:wrap;gap:4px;justify-content:center}
/* emoji count */
.emoji-groups-wrap{display:flex;align-items:center;gap:10px;justify-content:center;flex-wrap:wrap;margin:12px 0}
.plus-sign{font-family:var(--font-num),cursive;font-size:2rem;color:var(--green)}
.equals-sign{font-family:var(--font-num),cursive;font-size:2rem;color:var(--yellow)}
.result-box{width:56px;height:56px;border:3px dashed var(--yellow);border-radius:14px;display:flex;align-items:center;justify-content:center;font-family:var(--font-num),cursive;font-size:1.6rem;color:var(--yellow)}
.eg-emoji{font-size:1.6rem;line-height:1}
/* emoji remove */
.emoji-remove-wrap{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin:12px 0;padding:12px;background:var(--card2);border-radius:14px}
.er-emoji{font-size:1.8rem;transition:opacity .3s,transform .3s}
.er-emoji.removed{opacity:.15;transform:scale(.7)}
/* share visual */
.share-wrap{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:12px 0}
.share-group{background:var(--card2);border:2px solid var(--border);border-radius:14px;padding:10px 12px;display:flex;flex-wrap:wrap;gap:4px;min-width:70px;justify-content:center}
.share-label{font-size:.65rem;color:var(--muted);font-family:var(--font-en),sans-serif;text-align:center;margin-top:4px;font-weight:700}
/* multiplication groups */
.mult-groups{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:12px 0}
.mult-group{background:var(--card2);border:2px dashed var(--border);border-radius:14px;padding:10px;display:flex;flex-wrap:wrap;gap:3px;justify-content:center;min-width:60px}
/* tap / mcq options โ shared */
.opts-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;width:100%;max-width:500px}
.opt{background:var(--card2);border:2px solid var(--border);border-radius:16px;padding:16px 10px;color:var(--text);cursor:pointer;transition:all .15s;text-align:center;margin-bottom: 1em;}
.opt:active{transform:scale(.94)}
.opt.correct{background:rgba(63,185,80,.2);border-color:var(--green)}
.opt.wrong{background:rgba(248,81,73,.2);border-color:var(--red)}
.opt-num{font-family:var(--font-num),cursive;font-size:1.7rem}
.opt-gu{font-size:.95rem;font-weight:700;line-height:1.5}
.opt-en{font-family:var(--font-en),sans-serif;font-size:.62rem;color:var(--muted);margin-top:2px}
/* input */
.input-wrap{display:flex;gap:1em;width:100%;margin-top:1em;align-items:stretch}
.ans-inp{flex:1;min-width:0;background:var(--card2);border:2px solid var(--border);border-radius:14px;padding:14px 10px;color:var(--text);font-family:var(--font-num),cursive;font-size:1.8rem;text-align:center;outline:none;transition:border-color .2s;-webkit-appearance:none}
.ans-inp:focus{border-color:var(--blue)}
.go-btn{background:var(--blue);border:none;border-radius:14px;padding:14px 20px;color:white;font-family:var(--font-num),cursive;font-size:1.1rem;cursor:pointer;transition:transform .15s;flex-shrink:0}
.go-btn:active{transform:scale(.95)}
/* missing number */
.missing-wrap{display:flex;align-items:center;gap:8px;justify-content:center;margin:12px 0;flex-wrap:wrap}
.missing-part{font-family:var(--font-num),cursive;font-size:2rem}
.missing-blank{width:56px;height:56px;border:3px dashed var(--yellow);border-radius:14px;display:flex;align-items:center;justify-content:center;font-family:var(--font-num),cursive;font-size:1.8rem;color:var(--yellow)}
/* drag sum */
.drag-pool{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:10px 0}
.drag-num{width:52px;height:52px;background:var(--card2);border:2px solid var(--border);border-radius:14px;display:flex;align-items:center;justify-content:center;font-family:var(--font-num),cursive;font-size:1.4rem;cursor:pointer;transition:all .2s}
.drag-num.selected{border-color:var(--blue);background:rgba(88,166,255,.15);color:var(--blue)}
.drag-num.used{opacity:.25;pointer-events:none}
.drag-slots{display:flex;align-items:center;gap:10px;justify-content:center;margin:10px 0}
.drag-slot{width:56px;height:56px;border:3px dashed rgba(255,255,255,.2);border-radius:14px;display:flex;align-items:center;justify-content:center;font-family:var(--font-num),cursive;font-size:1.6rem;color:var(--muted)}
.drag-slot.filled{border-color:var(--purple);background:rgba(188,140,255,.1);color:var(--text)}
.drag-target{font-family:var(--font-num),cursive;font-size:1.2rem;color:var(--yellow);text-align:center;margin:4px 0}
/* visual sort */
.vsort-pool{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:8px 0}
.vsort-card{width:72px;height:72px;background:var(--card2);border:2px solid var(--border);border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;transition:all .15s}
.vsort-card:active{transform:scale(.9)}
.vsort-card.selected{border-color:var(--yellow);background:rgba(240,192,64,.12)}
.vsort-card.placed{opacity:.25;pointer-events:none}
.vsort-icon{font-size:2rem}
.vsort-label{font-size:.55rem;color:var(--muted);font-family:var(--font-en),sans-serif;font-weight:700;margin-top:2px;text-align:center}
.vsort-slots{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;padding:10px;border:2px dashed rgba(255,255,255,.1);border-radius:16px;min-height:88px;align-items:center;margin:8px 0}
.vsort-slot{width:72px;height:72px;border:2px dashed rgba(255,255,255,.15);border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(255,255,255,.02)}
.vsort-slot.filled{border-color:var(--purple);background:rgba(188,140,255,.08)}
.slot-num{font-size:.65rem;color:var(--muted);font-family:var(--font-en),sans-serif;font-weight:700}
/* binary */
.binary-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:14px 0}
.bit{width:58px;height:58px;border-radius:14px;border:3px solid rgba(255,255,255,.1);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;transition:all .15s;background:var(--card2)}
.bit.on{background:var(--blue);border-color:var(--blue);box-shadow:0 0 18px rgba(88,166,255,.5)}
.bit-v{font-family:var(--font-num),cursive;font-size:1.4rem}
.bit-p{font-size:.52rem;color:var(--muted);font-family:var(--font-en),sans-serif;font-weight:700;margin-top:2px}
.bit.on .bit-p{color:rgba(255,255,255,.7)}
.encode-total{text-align:center;font-family:var(--font-num),cursive;font-size:1.1rem;color:var(--yellow);margin:4px 0}
/* logic gate */
.gate-row{display:flex;align-items:center;gap:10px;justify-content:center;flex-wrap:wrap;margin:14px 0}
.gate-in{width:58px;height:58px;border-radius:14px;border:3px solid rgba(255,255,255,.1);display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--card2);transition:all .15s}
.gate-in.on{background:var(--green);border-color:var(--green);box-shadow:0 0 16px rgba(63,185,80,.4)}
.gi-v{font-family:var(--font-num),cursive;font-size:1.5rem}
.gi-l{font-size:.5rem;color:rgba(255,255,255,.5);font-family:var(--font-en),sans-serif;font-weight:700}
.gate-sym{background:var(--card2);border:2px solid var(--border);border-radius:12px;padding:8px 14px;font-family:var(--font-num),cursive;font-size:1rem;color:var(--yellow)}
.gate-arr{font-size:1.2rem;color:var(--muted)}
.gate-out{width:58px;height:58px;border-radius:14px;border:3px solid var(--purple);background:rgba(188,140,255,.1);display:flex;flex-direction:column;align-items:center;justify-content:center}
.go-v{font-family:var(--font-num),cursive;font-size:1.5rem;color:var(--purple)}
.go-l{font-size:.5rem;color:rgba(188,140,255,.6);font-family:var(--font-en),sans-serif;font-weight:700}
/* pattern */
.visual-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:14px 0}
.vis-card{width:60px;height:60px;background:var(--card2);border:2px solid var(--border);border-radius:14px;display:flex;align-items:center;justify-content:center;font-family:var(--font-num),cursive;font-size:1.4rem}
.vis-card.unknown{border:2px dashed var(--yellow);background:rgba(240,192,64,.08);color:var(--yellow);font-size:1.8rem}
/* data bars */
.bar-chart{display:flex;align-items:flex-end;gap:8px;height:120px;justify-content:center;margin:12px 0;padding:0 6px}
.bar-col{display:flex;flex-direction:column;align-items:center;gap:4px}
.bar{width:36px;border-radius:6px 6px 0 0;min-height:4px;transition:height .5s cubic-bezier(.34,1.56,.64,1)}
.bar-lbl{font-size:.6rem;color:var(--muted);font-weight:700;font-family:var(--font-en),sans-serif}
.bar-num{font-size:.65rem;font-weight:800;font-family:var(--font-num),cursive}
/* speed round */
.speed-wrap{width:100%;max-width:420px;text-align:center}
.speed-timer{font-family:var(--font-num),cursive;font-size:2.5rem;color:var(--yellow);margin-bottom:8px;transition:color .3s}
.speed-timer.urgent{color:var(--red);animation:pulse .5s ease infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.speed-sum{font-family:var(--font-num),cursive;font-size:2.5rem;margin:12px 0}
.speed-inp{width:120px;background:var(--card2);border:3px solid var(--border);border-radius:14px;padding:12px;color:var(--text);font-family:var(--font-num),cursive;font-size:1.8rem;text-align:center;outline:none;margin:0 auto;display:block;transition:border-color .2s}
.speed-inp:focus{border-color:var(--blue)}
.speed-score{font-family:var(--font-num),cursive;font-size:1rem;color:var(--muted);margin-top:8px}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
FEEDBACK + NEXT
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.fb{width:100%;max-width:520px;border-radius:16px;padding:13px 16px;font-weight:700;font-size:.9rem;line-height:1.6;display:none;animation:fadeUp .3s ease}
.fb.show{display:block}
.fb.ok{background:rgba(63,185,80,.12);border:2px solid var(--green);color:var(--green)}
.fb.bad{background:rgba(248,81,73,.12);border:2px solid var(--red);color:var(--red)}
.fb.warning{background:rgba(255,166,87,.12);border:2px solid var(--orange);color:var(--orange)}
.fb-en{font-family:var(--font-en),sans-serif;font-size:.75rem;opacity:.75;display:block;margin-top:3px}
.nxt-btn{background:linear-gradient(135deg,var(--blue),var(--purple));border:none;border-radius:16px;padding:13px 28px;color:white;font-family:var(--font-num),cursive;font-size:1rem;cursor:pointer;display:none;width:100%;max-width:520px;margin-top:12px;transition:transform .15s}
.nxt-btn.show{display:block}
.nxt-btn:active{transform:scale(.97)}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
ATTEMPTS DOTS
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.attempts-row{display:flex;gap:6px;justify-content:center;margin-bottom:10px}
.attempt-dot{width:12px;height:12px;border-radius:50%;background:var(--yellow);transition:background .3s}
.attempt-dot.used{background:rgba(255,255,255,.15)}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
COMPLETE
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.complete{display:none;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px 20px;flex:1}
.complete.show{display:flex}
.c-big{font-size:4.5rem;margin-bottom:12px;animation:bounce .6s ease}
@keyframes bounce{0%,100%{transform:scale(1)}50%{transform:scale(1.2)}}
.c-stars{font-size:2rem;letter-spacing:4px;margin-bottom:6px}
.c-msg-gu{font-size:.92rem;color:var(--muted);max-width:320px;line-height:1.7;margin-bottom:4px}
.c-msg-en{font-family:var(--font-en),sans-serif;font-size:.72rem;color:var(--muted);max-width:320px;line-height:1.6;margin-bottom:16px;opacity:.6}
.c-trophy{background:rgba(240,192,64,.12);border:2px solid var(--yellow);border-radius:16px;padding:12px 24px;font-size:1.8rem;margin-bottom:6px}
.c-trophy-name{font-family:var(--font-num),cursive;font-size:1rem;color:var(--yellow);margin-bottom:14px}
.c-xp{font-family:var(--font-num),cursive;font-size:1.3rem;color:var(--yellow);margin-bottom:18px}
.c-btns{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.c-btn{border:none;border-radius:14px;padding:12px 24px;font-family:var(--font-num),cursive;font-size:.95rem;cursor:pointer;transition:transform .15s}
.c-btn:active{transform:scale(.95)}
.c-btn.primary{background:linear-gradient(135deg,var(--blue),var(--purple));color:white}
.c-btn.secondary{background:var(--card2);color:var(--text);border:2px solid var(--border)}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
SPEAK BUTTON
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.speak-btn{background:rgba(88,166,255,.12);border:2px solid rgba(88,166,255,.25);border-radius:50px;padding:7px 14px;color:var(--blue);font-family:var(--font-en),sans-serif;font-size:.82rem;font-weight:800;cursor:pointer;display:flex;align-items:center;gap:5px;transition:all .2s;white-space:nowrap;max-width:220px;overflow:hidden}
.speak-btn:active{transform:scale(.94)}
.speak-btn.speaking{background:rgba(88,166,255,.25);border-color:var(--blue);animation:pulse .8s ease infinite}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
TEACHER GUIDE
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.t-fab{position:fixed;bottom:22px;right:16px;width:50px;height:50px;border-radius:50%;background:linear-gradient(135deg,var(--purple),var(--blue));border:none;color:white;font-size:1.3rem;cursor:pointer;box-shadow:0 4px 18px rgba(188,140,255,.4);z-index:100;display:flex;align-items:center;justify-content:center;transition:transform .2s}
.t-fab:active{transform:scale(.88)}
.t-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;display:none;flex-direction:column}
.t-overlay.show{display:flex}
.t-backdrop{flex:1;background:rgba(0,0,0,.65);backdrop-filter:blur(3px)}
.t-panel{background:var(--card);border-top:2px solid var(--purple);border-radius:24px 24px 0 0;max-height:78vh;display:flex;flex-direction:column}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:none}}
.t-panel{animation:slideUp .3s cubic-bezier(.34,1.56,.64,1)}
.t-ph{display:flex;align-items:center;padding:14px 16px 0;gap:10px}
.t-ptitle{font-size:.95rem;font-weight:800;color:var(--purple);flex:1}
.t-ptitle-en{font-family:var(--font-num),cursive;font-size:.62rem;opacity:.35}
.t-close{background:rgba(255,255,255,.07);border:none;color:var(--text);width:32px;height:32px;border-radius:8px;cursor:pointer;font-size:.9rem}
.t-body{overflow-y:auto;padding:12px 16px 28px}
.t-sec{margin-bottom:16px}
.t-sec-h{font-size:.65rem;letter-spacing:1.5px;text-transform:uppercase;font-weight:800;color:var(--yellow);font-family:var(--font-en),sans-serif;margin-bottom:7px}
.t-gu{font-size:.9rem;line-height:1.8}
.t-story{background:rgba(240,192,64,.07);border:1px solid rgba(240,192,64,.18);border-radius:12px;padding:12px 14px;margin-top:6px}
.t-script{background:rgba(88,166,255,.07);border:1px solid rgba(88,166,255,.18);border-radius:12px;padding:12px 14px;margin-top:6px}
.t-vocab{display:flex;flex-wrap:wrap;gap:7px;margin-top:7px}
.t-voc{background:var(--card2);border:1px solid var(--border);border-radius:9px;padding:6px 11px}
.t-voc-gu{font-size:.78rem;font-weight:700;display:block;line-height:1.4}
.t-voc-en{font-family:var(--font-en),sans-serif;font-size:.6rem;color:var(--muted)}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
SETTINGS
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.s-fab{position:fixed;bottom:22px;left:16px;width:50px;height:50px;border-radius:50%;background:var(--card2);border:2px solid var(--border);color:var(--muted);font-size:1.3rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .2s;z-index:100}
.s-fab:active{transform:scale(.88)}
.s-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;display:none;flex-direction:column}
.s-overlay.show{display:flex}
.s-backdrop{flex:1;background:rgba(0,0,0,.65);backdrop-filter:blur(3px)}
.s-panel{background:var(--card);border-top:2px solid var(--border);border-radius:24px 24px 0 0;max-height:60vh;display:flex;flex-direction:column;animation:slideUp .3s cubic-bezier(.34,1.56,.64,1)}
.s-ph{display:flex;align-items:center;padding:16px 18px;gap:10px;border-bottom:1px solid var(--border)}
.s-ptitle{font-size:1rem;font-weight:800;flex:1}
.s-close{background:rgba(255,255,255,.07);border:none;color:var(--text);width:34px;height:34px;border-radius:10px;cursor:pointer;font-size:1rem}
.s-body{padding:20px 18px 30px;overflow-y:auto}
.s-row{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.s-label{font-size:.9rem;font-weight:700;flex:1}
.s-label-en{font-family:var(--font-en),sans-serif;font-size:.65rem;color:var(--muted);display:block;margin-top:2px}
.fs-btns{display:flex;gap:8px}
.fs-btn{width:44px;height:44px;border-radius:12px;background:var(--card2);border:2px solid var(--border);color:var(--text);font-family:var(--font-num),cursive;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}
.fs-btn.active{background:var(--blue);border-color:var(--blue);color:white}
.s-toggle{width:52px;height:28px;border-radius:50px;background:var(--card2);border:2px solid var(--border);cursor:pointer;position:relative;transition:background .2s}
.s-toggle.on{background:var(--green);border-color:var(--green)}
.s-toggle::after{content:'';position:absolute;top:2px;left:2px;width:20px;height:20px;border-radius:50%;background:white;transition:transform .2s}
.s-toggle.on::after{transform:translateX(24px)}
.s-reset{background:rgba(248,81,73,.1);border:2px solid rgba(248,81,73,.3);border-radius:12px;padding:10px 18px;color:var(--red);font-family:var(--font-en),sans-serif;font-size:.82rem;font-weight:800;cursor:pointer;width:100%;margin-top:6px}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
STREAK / MODALS
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.streak-modal,.pin-overlay,.modal{position:fixed;top:0;right:0;bottom:0;left:0;z-index:400;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,.8);backdrop-filter:blur(6px);padding:20px}
.streak-modal.show,.pin-overlay.show,.modal.show{display:flex}
.streak-box{background:var(--card);border:2px solid var(--orange);border-radius:28px;padding:36px 30px;text-align:center;max-width:320px;animation:bounce .5s ease}
.streak-fire{font-size:5rem;margin-bottom:10px}
.streak-title{font-family:var(--font-num),cursive;font-size:2rem;color:var(--orange);margin-bottom:8px}
.streak-sub{font-size:.95rem;color:var(--muted);line-height:1.7;margin-bottom:20px}
.streak-ok{background:linear-gradient(135deg,var(--orange),var(--yellow));border:none;border-radius:14px;padding:13px 32px;color:white;font-family:var(--font-num),cursive;font-size:1.1rem;cursor:pointer;width:100%}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
REVIEW SCREEN
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.review-screen{display:none;flex-direction:column;align-items:center;justify-content:center;padding:24px 16px 80px;flex:1;overflow-y:auto}
.review-screen.show{display:flex}
.review-title{font-family:var(--font-num),cursive;font-size:1.6rem;color:var(--red);margin-bottom:6px;text-align:center}
.review-sub{font-size:.85rem;color:var(--muted);margin-bottom:20px;text-align:center}
.review-card{background:var(--card);border:2px solid rgba(248,81,73,.3);border-radius:18px;padding:18px 20px;width:100%;max-width:480px;margin-bottom:12px}
.review-q{font-size:.95rem;font-weight:700;margin-bottom:8px}
.review-ans{display:flex;gap:12px;align-items:center}
.review-wrong{font-family:var(--font-num),cursive;font-size:1.3rem;color:var(--red);text-decoration:line-through;opacity:.6}
.review-right{font-family:var(--font-num),cursive;font-size:1.3rem;color:var(--green)}
.review-done{background:linear-gradient(135deg,var(--blue),var(--purple));border:none;border-radius:16px;padding:14px 32px;color:white;font-family:var(--font-num),cursive;font-size:1.1rem;cursor:pointer;margin-top:8px;width:100%;max-width:480px}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
PIN
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.pin-box,.modal-box{background:var(--card);border:1px solid var(--border);border-radius:22px;padding:26px 22px;width:100%;max-width:300px;text-align:center}
.pin-title,.modal-tgu{font-size:1.05rem;font-weight:800;margin-bottom:3px}
.pin-sub,.modal-ten{font-family:var(--font-en),sans-serif;font-size:.72rem;color:var(--muted);margin-bottom:16px}
.pin-dots{display:flex;gap:12px;justify-content:center;margin-bottom:20px}
.pin-dot{width:14px;height:14px;border-radius:50%;background:rgba(255,255,255,.15);transition:background .2s}
.pin-dot.filled{background:var(--purple)}
.pin-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.pin-btn{background:var(--card2);border:1px solid var(--border);border-radius:14px;padding:16px;font-family:var(--font-num),cursive;font-size:1.4rem;cursor:pointer;transition:all .15s;color:var(--text)}
.pin-btn:active{transform:scale(.92);background:var(--purple)}
.pin-error{color:var(--red);font-family:var(--font-en),sans-serif;font-size:.78rem;margin-top:8px;min-height:20px}
.modal-inp{width:100%;background:var(--card2);border:2px solid var(--border);border-radius:12px;padding:13px;color:var(--text);font-family:var(--font-num),cursive;font-size:1.3rem;text-align:center;outline:none;margin-bottom:12px}
.modal-inp:focus{border-color:var(--blue)}
.modal-save{width:100%;background:var(--blue);border:none;border-radius:12px;padding:12px;color:white;font-family:var(--font-num),cursive;font-size:1rem;cursor:pointer}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
NOTEBOOK
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.notebook-screen{display:none;flex:1;overflow-y:auto;padding:16px 14px 90px}
.notebook-screen.active{display:block}
.nb-back{background:none;border:none;color:var(--muted);font-size:.8rem;cursor:pointer;padding:0 0 12px;font-family:var(--font-en),sans-serif;display:flex;align-items:center;gap:4px}
.nb-section{margin-bottom:24px}
.nb-head{font-family:var(--font-num),cursive;font-size:1.1rem;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.xp-history{display:flex;align-items:flex-end;gap:6px;height:80px;padding:0 4px}
.xp-bar-day{display:flex;flex-direction:column;align-items:center;gap:4px;flex:1}
.xp-bar-fill{width:100%;border-radius:4px 4px 0 0;background:var(--blue);min-height:2px;transition:height .5s ease}
.xp-bar-lbl{font-size:.55rem;color:var(--muted);font-family:var(--font-en),sans-serif;font-weight:700}
.nb-stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.nb-stat{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px;text-align:center}
.nb-stat-val{font-family:var(--font-num),cursive;font-size:2rem;margin-bottom:4px}
.nb-stat-lbl{font-size:.75rem;color:var(--muted)}
.nb-trophy-grid{display:flex;flex-wrap:wrap;gap:10px}
.nb-trophy{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:12px 14px;display:flex;align-items:center;gap:10px;flex:1;min-width:140px}
.nb-trophy-icon{font-size:1.8rem}
.nb-trophy-name{font-family:var(--font-en),sans-serif;font-size:.75rem;font-weight:800}
.nb-trophy.locked{opacity:.3}
/* โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
CONFETTI
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ */
.confetti-piece{position:fixed;width:8px;height:8px;border-radius:2px;animation:fall 2.5s ease-in forwards;pointer-events:none;z-index:999}
@keyframes fall{0%{transform:translateY(-20px) rotate(0deg);opacity:1}100%{transform:translateY(100vh) rotate(720deg);opacity:0}}
</style>
</head>
<body>
<!-- TOPBAR -->
<div class="topbar">
<div class="logo" onclick="showNameModal()">
<span id="logoTxt">Yuval's Lab</span>
<span>๐ฌ COMPUTER SCIENTIST</span>
</div>
<button onclick="openNotebook()" style="background:rgba(255,255,255,.07);border:1px solid var(--border);border-radius:10px;padding:6px 10px;color:var(--muted);font-size:.75rem;cursor:pointer;font-family:var(--font-en),sans-serif;font-weight:800;flex-shrink:0">๐</button>
<div class="xp-col">
<div class="xp-track"><div class="xp-fill" id="xpFill"></div></div>
<div class="xp-row"><span id="xpLbl">0 XP</span><span id="lvlLbl">Lv 1</span></div>
</div>
<div class="streak-badge" id="streakBadge">๐ฅ0</div>
</div>
<!-- HOME SCREEN -->
<div class="screen active" id="homeScreen">
<div class="welcome-strip">
<div class="welcome-avatar">๐</div>
<div>
<div class="welcome-gu" id="wGu">เชจเชฎเชธเซเชคเซ, Yuval!</div>
<div class="welcome-en" id="wEn">Hello Yuval! Ready to learn?</div>
</div>
<button class="name-btn" onclick="showNameModal()">โ๏ธ เชจเชพเชฎ - Add Your Name</button>
</div>
<!-- Trophy shelf -->
<div class="trophy-shelf">
<div class="trophy-head">๐ เชเซเชฐเซเชซเซ เชเซเชฌเชฟเชจเซเช โ Trophy Cabinet</div>
<div class="trophy-row" id="trophyRow"></div>
</div>
<div id="sectionsWrap"></div>
</div>
<!-- CHALLENGE LIST SCREEN -->
<div class="screen" id="challengeScreen">
<div class="section-wrap">
<div class="ch-header">
<button class="ch-back" onclick="backToHome()">โ เชชเชพเชเชพ เชเชพเช / Back</button>
<div style="display:flex;align-items:center;gap:10px">
<span id="chCatIcon" style="font-size:2rem"></span>
<div>
<div class="ch-title-gu" id="chTitleGu"></div>
<div class="ch-title-en" id="chTitleEn"></div>
</div>
</div>
<div class="cat-prog-bar" style="margin-top:10px"><div class="cat-prog-fill" id="chProgFill"></div></div>
</div>
<div id="challengeList"></div>
</div>
</div>
<!-- GAME SCREEN -->
<div id="gameScreen">
<div class="g-header">
<button class="g-back" onclick="exitGame()">โ</button>
<div class="g-titles">
<div class="g-title-gu" id="gTitleGu"></div>
<div class="g-title-en" id="gTitleEn"></div>
</div>
<button class="speak-btn" id="replaySpeakBtn" onclick="speakCurrent()" title="Read aloud">๐</button>
<div class="g-dots" id="gDots"></div>
</div>
<div class="g-body" id="gBody">
<div class="attempts-row" id="attemptsRow">
<div class="attempt-dot" id="att0"></div>
<div class="attempt-dot" id="att1"></div>
</div>
<div class="q-card" id="qCard"></div>
<div class="fb" id="fb"></div>
<button class="nxt-btn" id="nxtBtn" onclick="nextQ()"></button>
</div>
<div class="complete" id="completeScreen"></div>
</div>
<!-- TEACHER FAB -->
<button class="t-fab" onclick="requirePIN('teacher')" id="tFab">๐</button>
<!-- SETTINGS FAB -->
<button class="s-fab" onclick="requirePIN('settings')">โ๏ธ</button>
<!-- SETTINGS OVERLAY -->
<div class="s-overlay" id="sOverlay">
<div class="s-backdrop" onclick="closeSettings()"></div>
<div class="s-panel">
<div class="s-ph">
<div class="s-ptitle">โ๏ธ เชธเซเชเชฟเชเชเซเชธ โ Settings</div>
<button class="s-close" onclick="closeSettings()">โ</button>
</div>
<div class="s-body">
<div class="s-row">
<div class="s-label">เช
เชเซเชทเชฐ เชจเซ size
<span class="s-label-en">Font Size</span>
</div>
<div class="fs-btns">
<button class="fs-btn" data-fs="0.9" onclick="setFS(0.9)" style="font-size:.75rem">A</button>
<button class="fs-btn active" data-fs="1.0" onclick="setFS(1.0)" style="font-size:.9rem">A</button>
<button class="fs-btn" data-fs="1.15" onclick="setFS(1.15)" style="font-size:1.05rem">A</button>
<button class="fs-btn" data-fs="1.3" onclick="setFS(1.3)" style="font-size:1.2rem">A</button>
</div>
</div>
<div class="s-row">
<div class="s-label">๐ Auto-speak question
<span class="s-label-en">Read question aloud automatically</span>
</div>
<div class="s-toggle on" id="autoSpeakToggle" onclick="toggleAutoSpeak()"></div>
</div>
<div class="s-row">
<div class="s-label">๐ฌ๐ง Speak English too
<span class="s-label-en">Read English text after Gujarati</span>
</div>
<div class="s-toggle on" id="speakEnToggle" onclick="toggleSpeakEn()"></div>
</div>
<div class="s-row" style="margin-bottom:8px">
<div class="s-label" style="font-size:.75rem">
<span id="voiceStatus" style="color:var(--muted);font-family:var(--font-en),sans-serif">Checking voices...</span>
</div>
<button style="background:rgba(88,166,255,.1);border:1px solid rgba(88,166,255,.2);border-radius:8px;padding:6px 12px;color:var(--blue);font-size:.72rem;cursor:pointer;font-family:var(--font-en),sans-serif;font-weight:800" onclick="checkVoices()">๐ Check</button>
</div>
<div class="s-row" style="margin-bottom:10px">
<div class="s-label">๐ Change PIN
<span class="s-label-en">Default is 1234</span>
</div>
<button style="background:rgba(188,140,255,.1);border:1px solid rgba(188,140,255,.3);border-radius:8px;padding:6px 12px;color:var(--purple);font-size:.72rem;cursor:pointer;font-family:var(--font-en),sans-serif;font-weight:800" onclick="changePIN()">Change</button>
</div>
<button class="s-reset" onclick="resetSettings()">๐ Reset to defaults</button>
</div>
</div>
</div>
<!-- TEACHER OVERLAY -->
<div class="t-overlay" id="tOverlay">
<div class="t-backdrop" onclick="closeTeacher()"></div>
<div class="t-panel">
<div class="t-ph">
<div>
<div class="t-ptitle">๐ เชถเชฟเชเซเชทเช เชฎเชพเชฐเซเชเชฆเชฐเซเชถเชฟเชเชพ</div>
<div class="t-ptitle-en">Teacher Guide โ Gujarati</div>
</div>
<button class="t-close" onclick="closeTeacher()">โ</button>
</div>
<div class="t-body" id="tBody"></div>
</div>
</div>
<!-- NOTEBOOK SCREEN -->
<div class="notebook-screen screen" id="notebookScreen">
<button class="nb-back" onclick="closeNotebook()">โ เชชเชพเชเชพ / Back</button>
<div class="nb-section">
<div class="nb-head">๐ XP History โ Last 7 Days</div>
<div class="xp-history" id="xpHistory"></div>
</div>
<div class="nb-section">
<div class="nb-head">๐
Stats</div>
<div class="nb-stat-grid" id="nbStats"></div>
</div>
<div class="nb-section">
<div class="nb-head">๐ Trophies</div>
<div class="nb-trophy-grid" id="nbTrophies"></div>
</div>
</div>
<!-- STREAK MODAL -->
<div class="streak-modal" id="streakModal">
<div class="streak-box">
<div class="streak-fire">๐ฅ</div>
<div class="streak-title" id="streakTitle">7 Day Streak!</div>
<div class="streak-sub" id="streakSub">Yuval, เชคเซเช 7 เชฆเชฟเชตเชธ consecutive เชฐเชฎเซเชฏเซ!<br>That's incredible dedication! ๐</div>
<button class="streak-ok" onclick="closeStreakModal()">Let's go! ๐</button>
</div>
</div>
<!-- REVIEW SCREEN (inside game) -->
<div class="review-screen" id="reviewScreen">
<div class="review-title">โ โ โ
Review Time!</div>
<div class="review-sub" id="reviewSub">เช เชเซเชเชพ เชนเชคเชพ โ let's review:</div>
<div id="reviewList"></div>
<button class="review-done" onclick="finishReview()">Done! Home โ</button>
</div>
<!-- PIN OVERLAY -->
<div class="pin-overlay" id="pinOverlay">
<div class="pin-box">
<div class="pin-title" id="pinTitle">๐ Teacher Mode</div>
<div class="pin-sub" id="pinSub">4-digit PIN เชฆเชพเชเชฒ เชเชฐเซ</div>
<div class="pin-dots" id="pinDots">
<div class="pin-dot" id="pd0"></div>
<div class="pin-dot" id="pd1"></div>
<div class="pin-dot" id="pd2"></div>
<div class="pin-dot" id="pd3"></div>
</div>
<div class="pin-grid">
<button class="pin-btn" onclick="pinTap('1')">1</button>
<button class="pin-btn" onclick="pinTap('2')">2</button>
<button class="pin-btn" onclick="pinTap('3')">3</button>
<button class="pin-btn" onclick="pinTap('4')">4</button>
<button class="pin-btn" onclick="pinTap('5')">5</button>
<button class="pin-btn" onclick="pinTap('6')">6</button>
<button class="pin-btn" onclick="pinTap('7')">7</button>
<button class="pin-btn" onclick="pinTap('8')">8</button>
<button class="pin-btn" onclick="pinTap('9')">9</button>
<button class="pin-btn" onclick="pinClear()" style="font-size:1rem">โซ</button>
<button class="pin-btn" onclick="pinTap('0')">0</button>
<button class="pin-btn" onclick="closePinOverlay()" style="font-size:.8rem;color:var(--muted)">โ</button>
</div>
<div class="pin-error" id="pinError"></div>
</div>
</div>
<!-- NAME MODAL -->
<div class="modal" id="nameModal" onclick="e=>e.target===this&&this.classList.remove('show')">
<div class="modal-box">
<div class="modal-tgu">เชจเชพเชฎ เชฌเชฆเชฒเซ ๐</div>
<div class="modal-ten">Change name โ saved on this device</div>
<input class="modal-inp" id="nameInp" placeholder="Yuval" maxlength="20">
<button class="modal-save" onclick="saveName()">เชธเชพเชเชตเซ โ</button>
</div>
</div>
<script>
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// STATE
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
const S = {
get name(){ return localStorage.getItem('yl2_name')||'Yuval' },
set name(v){ localStorage.setItem('yl2_name',v) },
get xp(){ return parseInt(localStorage.getItem('yl2_xp')||0) },
set xp(v){ localStorage.setItem('yl2_xp',v) },
get streak(){ return parseInt(localStorage.getItem('yl2_streak')||0) },
set streak(v){ localStorage.setItem('yl2_streak',v) },
getStars(cid){ return parseInt(localStorage.getItem('yl2_s_'+cid)||0) },
setStars(cid,v){ const cur=this.getStars(cid); if(v>cur) localStorage.setItem('yl2_s_'+cid,v) },
getTrophies(){ try{return JSON.parse(localStorage.getItem('yl2_trophies')||'[]')}catch{return[]} },
addTrophy(t){ const tr=this.getTrophies(); if(!tr.find(x=>x.nameEn===t.nameEn)){tr.push(t);localStorage.setItem('yl2_trophies',JSON.stringify(tr))} },
// Settings
get fs(){ return parseFloat(localStorage.getItem('yl2_fs')||1.0) },
set fs(v){ localStorage.setItem('yl2_fs',v) },
get autoSpeak(){ return localStorage.getItem('yl2_autoSpeak')!=='false' },
set autoSpeak(v){ localStorage.setItem('yl2_autoSpeak',v) },
get speakEn(){ return localStorage.getItem('yl2_speakEn')!=='false' },
set speakEn(v){ localStorage.setItem('yl2_speakEn',v) },
};
// โโ ATTEMPTS โโ
let attemptsLeft = 2;
let currentQText = {gu:'', en:''};
let registry = null;
let challengeData = {}; // path โ data
let currentCat = null;
let currentChallenge = null;
let questions = [];
let qIdx = 0;
let score = 0;
let answered = false;
// drag-sum state
let dragSelected = [];
// vsort state
let vsortSelected = null;
let vsortSlots = [];
// speed round
let speedTimer = null;
let speedTimeLeft = 0;
let speedIdx = 0;
let speedScore = 0;
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// AUDIO FEEDBACK (Web Audio API โ no files)
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
let _audioCtx = null;
function getAudioCtx(){ if(!_audioCtx) try{ _audioCtx = new (window.AudioContext||window.webkitAudioContext)(); }catch(e){} return _audioCtx; }
function playTone(freq, dur, type='sine', vol=0.3){
const ctx = getAudioCtx(); if(!ctx) return;
const o = ctx.createOscillator();
const g = ctx.createGain();
o.connect(g); g.connect(ctx.destination);
o.type = type; o.frequency.value = freq;
g.gain.setValueAtTime(vol, ctx.currentTime);
g.gain.exponentialRampToValueAtTime(0.001, ctx.currentTime + dur);
o.start(); o.stop(ctx.currentTime + dur);
}
function playCorrect(){ playTone(523,0.1); setTimeout(()=>playTone(659,0.1),100); setTimeout(()=>playTone(784,0.2),200); }
function playWrong(){ playTone(200,0.3,'sawtooth',0.2); }
function playLevelUp(){ [523,587,659,698,784].forEach((f,i)=>setTimeout(()=>playTone(f,0.15),i*80)); }
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// STREAK SYSTEM
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
function checkStreak(){
const today = new Date().toDateString();
const last = localStorage.getItem('yl2_lastDay') || '';
const yesterday = new Date(Date.now()-86400000).toDateString();
if(last === today) return; // already played today
if(last === yesterday){
S.streak++;
// XP bonus for streaks
if(S.streak >= 3) S.xp += S.streak * 5;
} else if(last !== today) {
S.streak = 1; // reset if gap
}
localStorage.setItem('yl2_lastDay', today);
// Record XP for this day
recordDayXP();
// Show celebration at milestone streaks
if([3,7,14,21,30].includes(S.streak)) showStreakModal(S.streak);
}
function showStreakModal(days){
const msgs = {
3: ['3 เชฆเชฟเชตเชธ! ๐ฅ','Yuval, 3 consecutive days! Great start!'],
7: ['7 Days! ๐','เชเช week! You played every single day!'],
14: ['2 Weeks! ๐','14 days straight! You are unstoppable!'],
21: ['21 Days! ๐','3 weeks! Habit fully formed! ๐ช'],
30: ['1 Month! ๐','30 DAYS! Yuval you are a LEGEND!'],
};
const [title, sub] = msgs[days] || [days+' Days!','Amazing streak!'];
document.getElementById('streakTitle').textContent = title;
document.getElementById('streakSub').textContent = sub;
document.getElementById('streakModal').classList.add('show');
spawnConfetti(80); playLevelUp();
}
function closeStreakModal(){ document.getElementById('streakModal').classList.remove('show'); }
// XP history (last 7 days)
function recordDayXP(){
const today = new Date().toDateString();
const hist = JSON.parse(localStorage.getItem('yl2_xphist')||'{}');
hist[today] = (hist[today]||0) + 1; // mark day active
localStorage.setItem('yl2_xphist', JSON.stringify(hist));
}
function recordXPEarned(amt){
const today = new Date().toDateString();
const hist = JSON.parse(localStorage.getItem('yl2_xphist')||'{}');
hist[today] = (hist[today]||0) + amt;
localStorage.setItem('yl2_xphist', JSON.stringify(hist));
}
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// WRONG ANSWERS TRACKER
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
let wrongAnswers = []; // [{q, wrongVal, correctVal}]
function trackWrong(q, wrongVal, correctVal){
// Only store unique questions
if(!wrongAnswers.find(w=>w.q.textGu===q.textGu))
wrongAnswers.push({q, wrongVal, correctVal});
}
function showReviewScreen(){
if(!wrongAnswers.length){ goHome(); return; }
document.getElementById('gBody').style.display='none';
document.getElementById('completeScreen').className='complete';
const rs = document.getElementById('reviewScreen');
rs.classList.add('show');
document.getElementById('reviewSub').textContent =
wrongAnswers.length + ' questions เชเซเชเชพ เชนเชคเชพ โ review karo!';
const list = document.getElementById('reviewList');
list.innerHTML = wrongAnswers.map(w=>`
<div class="review-card">
<div class="review-q">${w.q.textGu}</div>
<div class="review-q" style="font-family:var(--font-en),sans-serif;font-size:.75rem;opacity:.6">${w.q.textEn||''}</div>
<div class="review-ans">
<div class="review-wrong">${w.wrongVal}</div>
<div class="review-arrow">โ</div>
<div class="review-right">โ ${w.correctVal}</div>
</div>
</div>`).join('');
}
function finishReview(){
document.getElementById('reviewScreen').classList.remove('show');
goHome();
}
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// PIN SYSTEM
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
const DEFAULT_PIN = '1234';
let _pinBuffer = '';
let _pinCallback = null;
function requirePIN(action){
const savedPIN = localStorage.getItem('yl2_pin') || DEFAULT_PIN;
_pinBuffer = '';
_pinCallback = action;
document.getElementById('pinError').textContent = '';
updatePinDots();
document.getElementById('pinOverlay').classList.add('show');
}
function pinTap(d){
if(_pinBuffer.length >= 4) return;
_pinBuffer += d;
updatePinDots();
if(_pinBuffer.length === 4) setTimeout(checkPIN, 200);
}
function pinClear(){ _pinBuffer = _pinBuffer.slice(0,-1); updatePinDots(); }
function updatePinDots(){
for(let i=0;i<4;i++){
const d=document.getElementById('pd'+i);
if(d) d.className='pin-dot'+(_pinBuffer.length>i?' filled':'');
}
}
function checkPIN(){
if(_pinBuffer === (localStorage.getItem('yl2_pin') || DEFAULT_PIN)){
document.getElementById('pinOverlay').classList.remove('show');
if(_pinCallback === 'teacher') openTeacher();
else if(_pinCallback === 'settings') openSettings();
else if(typeof _pinCallback === 'function') _pinCallback();
_pinCallback = null;
} else {
document.getElementById('pinError').textContent = 'โ Wrong PIN! Try again.';
_pinBuffer = '';
updatePinDots();
playWrong();
}
}
function closePinOverlay(){ document.getElementById('pinOverlay').classList.remove('show'); _pinCallback=null; }
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// NOTEBOOK
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
function openNotebook(){
showScreen('notebookScreen');
renderNotebook();
}
function closeNotebook(){ showScreen('homeScreen'); renderHome(); }
function renderNotebook(){
// XP history chart
const hist = JSON.parse(localStorage.getItem('yl2_xphist')||'{}');
const days = [];
for(let i=6;i>=0;i--){
const d = new Date(Date.now()-i*86400000);
const key = d.toDateString();
const lbl = d.toLocaleDateString('en',{weekday:'short'});
days.push({key, lbl, xp: hist[key]||0});
}
const maxXP = Math.max(...days.map(d=>d.xp), 1);
document.getElementById('xpHistory').innerHTML = days.map(d=>{
const h = Math.round((d.xp/maxXP)*70)+4;
const active = d.xp > 0;
return `<div class="xp-bar-day">
<div style="font-size:.6rem;color:${active?'var(--yellow)':'var(--muted)'};font-family:var(--font-num),cursive">${d.xp||''}</div>
<div class="xp-bar-fill" style="height:${h}px;background:${active?'var(--blue)':'rgba(255,255,255,.07)'}"></div>
<div class="xp-bar-lbl">${d.lbl}</div>
</div>`;
}).join('');
// Stats
const doneCh = registry ? registry.sections.reduce((s,sec)=>s+sec.categories.reduce((s2,cat)=>
s2+cat.challenges.filter(ch=>S.getStars(challengeData[`content/category/${cat.id}/${ch}.json`]?.id||'')>0).length,0),0) : 0;
document.getElementById('nbStats').innerHTML = `
<div class="nb-stat"><div class="nb-stat-val" style="color:var(--yellow)">${S.xp}</div><div class="nb-stat-lbl">Total XP</div></div>
<div class="nb-stat"><div class="nb-stat-val" style="color:var(--orange)">๐ฅ${S.streak}</div><div class="nb-stat-lbl">Day Streak</div></div>
<div class="nb-stat"><div class="nb-stat-val" style="color:var(--green)">${doneCh}</div><div class="nb-stat-lbl">Challenges Done</div></div>
<div class="nb-stat"><div class="nb-stat-val" style="color:var(--blue)">${Math.floor(S.xp/300)+1}</div><div class="nb-stat-lbl">Level</div></div>`;
// Trophies
const earned = S.getTrophies();
const allT = [];
if(registry) registry.sections.forEach(s=>s.categories.forEach(cat=>cat.challenges.forEach(ch=>{
const d=challengeData[`content/category/${cat.id}/${ch}.json`];
if(d?.trophy) allT.push({...d.trophy, earned: !!earned.find(e=>e.nameEn===d.trophy.nameEn)});
})));
document.getElementById('nbTrophies').innerHTML = allT.map(t=>`
<div class="nb-trophy ${t.earned?'':'locked'}">
<div class="nb-trophy-icon">${t.icon}</div>
<div class="nb-trophy-name">${t.nameGu}<br><span style="opacity:.5;font-size:.65rem">${t.nameEn}</span></div>
</div>`).join('') || '<div style="color:var(--muted);font-size:.85rem">Complete challenges to earn trophies!</div>';
}
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// BOOT
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
async function boot(){
// Apply saved font scale immediately
applyFS(S.fs, false);
// Pre-warm speech synthesis voices (critical for iOS Safari)
initVoices();
updateTopbar();
updateWelcome();
// Check daily streak
checkStreak();
try {
const r = await fetch('content/registry.json');
registry = await r.json();
await preloadChallenges();
renderHome();
} catch(e) {
document.getElementById('sectionsWrap').innerHTML =
'<div style="padding:30px;text-align:center;color:var(--muted);font-family:\'Noto Sans Gujarati\',sans-serif">โ ๏ธ content/registry.json เชฎเชณเซเชฏเซ เชจเชนเซเช.<br><span style="font-family:\'Nunito\',sans-serif;font-size:.8rem">Deploy to GitHub Pages and the content/ folder will work.</span></div>';
}
}
async function preloadChallenges(){
const fetches = [];
registry.sections.forEach(sec => {
sec.categories.forEach(cat => {
cat.challenges.forEach(ch => {
const path = `content/category/${cat.id}/${ch}.json`;
fetches.push(
fetch(path).then(r=>r.json()).then(d=>{ challengeData[path]=d; }).catch(()=>{})
);
});
});
});
await Promise.allSettled(fetches);
}
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// TOPBAR / WELCOME
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
function updateTopbar(){
const lv = Math.floor(S.xp/300)+1;
const pct = (S.xp%300)/300*100;
document.getElementById('xpFill').style.width = pct+'%';
document.getElementById('xpLbl').textContent = S.xp+' XP';
document.getElementById('lvlLbl').textContent = 'Lv '+lv;
document.getElementById('streakBadge').textContent = '๐ฅ'+S.streak;
document.getElementById('logoTxt').textContent = S.name+"'s Lab";
}
function updateWelcome(){
document.getElementById('wGu').textContent = `เชจเชฎเชธเซเชคเซ, ${S.name}! ๐`;
document.getElementById('wEn').textContent = `Hello ${S.name}! Ready to learn?`;
}
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// HOME
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
function renderHome(){
renderTrophies();
const wrap = document.getElementById('sectionsWrap');
wrap.innerHTML = '';
registry.sections.forEach(sec => {
const totalCh = sec.categories.reduce((s,c)=>s+c.challenges.length,0);
const doneCh = sec.categories.reduce((s,c)=>s+c.challenges.filter(ch=>{
const path=`content/category/${c.id}/${ch}.json`;
return S.getStars(challengeData[path]?.id||'')>0;
}).length,0);
const pct = totalCh>0?Math.round(doneCh/totalCh*100):0;
let html = `<div class="section-wrap">
<div class="section-head">
<span class="section-icon">${sec.icon}</span>
<span class="section-name-gu">${sec.nameGu}</span>
<span class="section-name-en">${sec.nameEn}</span>
<div class="section-line"></div>
<span class="section-progress">${pct}%</span>
</div>
<div class="cat-grid">`;
sec.categories.forEach((cat) => {
const chCount = cat.challenges.length;
const chDone = cat.challenges.filter(ch=>{
const path=`content/category/${cat.id}/${ch}.json`;
return S.getStars(challengeData[path]?.id||'')>0;
}).length;
const cpct = chCount>0?Math.round(chDone/chCount*100):0;
const color = `rgb(${cat.colorRGB})`;
html += `<div class="cat-card" style="border-color:rgba(${cat.colorRGB},.25)"
onmouseenter="this.style.borderColor='rgb(${cat.colorRGB})';this.style.boxShadow='0 0 24px rgba(${cat.colorRGB},.2)'"
onmouseleave="this.style.borderColor='rgba(${cat.colorRGB},.25)';this.style.boxShadow='none'"
onclick="openCategory('${sec.id}','${cat.id}')">
<div class="cat-icon">${cat.icon}</div>
<div class="cat-name-gu" style="color:${color}">${cat.nameGu}</div>
<div class="cat-name-en">${cat.nameEn}</div>
<div class="cat-prog-bar"><div class="cat-prog-fill" style="width:${cpct}%;background:${color}"></div></div>
<div class="cat-prog-label">${chDone}/${chCount} challenges</div>
</div>`;
});
html += '</div></div>';
wrap.innerHTML += html;
});
}
function renderTrophies(){
const trophies = S.getTrophies();
const allTrophies = [];
if(registry) registry.sections.forEach(s=>s.categories.forEach(c=>c.challenges.forEach(ch=>{
const path=`content/category/${c.id}/${ch}.json`;
if(challengeData[path]?.trophy) allTrophies.push(challengeData[path].trophy);
})));
const row = document.getElementById('trophyRow');
if(!allTrophies.length){ row.innerHTML='<span style="font-size:.75rem;color:var(--muted);font-family:\'Nunito\',sans-serif">Complete challenges to earn trophies! ๐</span>'; return; }
row.innerHTML = allTrophies.map(t=>{
const earned = trophies.find(x=>x.nameEn===t.nameEn);
return `<span class="trophy-item ${earned?'earned':''}" title="${t.nameEn}">${t.icon}</span>`;
}).join('');
}
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
// CATEGORY โ CHALLENGE LIST
// โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
function openCategory(secId, catId){
const sec = registry.sections.find(s=>s.id===secId);
const cat = sec.categories.find(c=>c.id===catId);
currentCat = cat;
document.getElementById('chCatIcon').textContent = cat.icon;
document.getElementById('chTitleGu').textContent = cat.nameGu;
document.getElementById('chTitleEn').textContent = cat.nameEn;
const chDone = cat.challenges.filter(ch=>S.getStars(challengeData[`content/category/${cat.id}/${ch}.json`]?.id||'')>0).length;
const pct = Math.round(chDone/cat.challenges.length*100);
document.getElementById('chProgFill').style.width = pct+'%';
document.getElementById('chProgFill').style.background = `rgb(${cat.colorRGB})`;
const list = document.getElementById('challengeList');
list.innerHTML = '';
const color = `rgb(${cat.colorRGB})`;
cat.challenges.forEach((chId, i) => {
const path = `content/category/${cat.id}/${chId}.json`;
const ch = challengeData[path];
if(!ch){ return; }
const stars = S.getStars(ch.id);
const prevPath = i>0?`content/category/${cat.id}/${cat.challenges[i-1]}.json`:null;