:root{
  color-scheme:dark;
  --navy:#0b1f44; --navy-2:#102a5c; --navy-3:#163672; --ink:#071331; --bg:#060e24;
  --gold:#d4a72c; --gold-2:#f0c75e; --cream:#f7f3e8; --muted:#aab4cc; --line:#24407a;
  --green:#2fa36b; --green-bg:rgba(47,163,107,.18); --red:#d9534f; --red-bg:rgba(217,83,79,.18);
  --font:"Inter","Noto Sans Devanagari",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{background:var(--bg);color:var(--cream);font-family:var(--font);line-height:1.5;-webkit-font-smoothing:antialiased}
button{font:inherit;cursor:pointer}
.hidden{display:none !important}

.top{display:flex;align-items:center;gap:16px;padding:10px 18px;background:linear-gradient(90deg,var(--ink),var(--navy) 55%,var(--ink));border-bottom:2px solid var(--gold);position:sticky;top:env(safe-area-inset-top,0px);z-index:20;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px}
.logo{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:8px;background:var(--gold);color:var(--ink);font-weight:800;letter-spacing:.5px}
.brand-t{font-weight:800;letter-spacing:.3px}
.brand-s{font-size:.78rem;color:var(--muted)}
.day-pill{margin-left:auto;background:rgba(212,167,44,.14);border:1px solid var(--gold);color:var(--gold-2);padding:5px 12px;border-radius:999px;font-size:.8rem;font-weight:700}
.pills{display:flex;gap:6px;flex-wrap:wrap}
.pill{background:var(--navy-2);border:1px solid var(--line);color:var(--muted);padding:4px 10px;border-radius:999px;font-size:.75rem;font-weight:700}
.pill.done{border-color:var(--green);color:#9ee3bf}
.pill.cur{border-color:var(--gold);color:var(--gold-2);background:rgba(212,167,44,.12)}
.pill.locked{opacity:.55;cursor:not-allowed}
.pill.open{cursor:pointer}

main{max-width:1380px;margin:0 auto;padding:16px}
.screen{display:none}.screen.active{display:block}

.kicker{color:var(--gold-2);font-weight:800;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase}
.landing-card,.test-card{background:var(--navy);border:1px solid var(--line);border-radius:16px;padding:28px;max-width:960px;margin:24px auto}
h1{font-size:1.7rem;line-height:1.25;margin:8px 0 12px}
h2{font-size:1.35rem;margin:4px 0}
.lead{color:#dfe5f3;max-width:70ch}
.stats{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}
.stat{background:var(--navy-2);border:1px solid var(--line);border-radius:10px;padding:10px 14px;min-width:120px}
.stat b{display:block;font-size:1.3rem;color:var(--gold-2)}
.stat span{font-size:.78rem;color:var(--muted)}
.landing-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:10px}
.fine{font-size:.78rem;color:var(--muted);margin-top:14px}

.btn{border:none;border-radius:10px;padding:10px 18px;font-weight:800;transition:.15s;color:var(--ink);background:var(--gold)}
.btn:hover{background:var(--gold-2)}
.btn.big{font-size:1.05rem;padding:14px 26px}
.btn.ghost{background:transparent;color:var(--cream);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--gold);color:var(--gold-2)}
.btn:disabled{opacity:.5;cursor:not-allowed}

.stage{display:grid;grid-template-columns:1.55fr 1fr;gap:14px}
.board-wrap{position:relative;container-type:inline-size;aspect-ratio:16/9;background:var(--navy);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.board{position:absolute;inset:0;padding:3.2cqw 3.6cqw;overflow:auto;animation:fade .35s;font-size:clamp(.6rem,1.55cqw,1.15rem)}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.card{position:absolute;left:3%;right:3%;bottom:4%;background:rgba(7,19,49,.96);border-left:.45em solid var(--gold);border-radius:.5em;padding:.7em 1em;font-weight:700;font-size:clamp(.66rem,1.8cqw,1.2rem);z-index:2;box-shadow:0 10px 30px rgba(0,0,0,.45);animation:fade .3s}
.card .l2{display:block;font-weight:500;color:#dfe5f3;font-size:.9em;margin-top:.15em}
.full{position:absolute;inset:0;background:var(--ink);padding:4cqw 5cqw;display:flex;flex-direction:column;justify-content:center;gap:.45em;animation:fade .3s;font-size:clamp(.66rem,1.9cqw,1.3rem);z-index:2;overflow:auto}
.full .fh{color:var(--gold-2);font-weight:800;font-size:1.35em;margin-bottom:.4em;border-bottom:2px solid var(--gold);padding-bottom:.4em}
.full .fl{font-weight:600;padding:.2em 0;line-height:1.4}
.ribbon{position:absolute;top:8px;right:8px;background:rgba(217,83,79,.92);color:#fff;font-size:.62rem;font-weight:800;padding:3px 9px;border-radius:999px;letter-spacing:.05em;box-shadow:0 2px 8px rgba(0,0,0,.4);z-index:3}

/* board content vocabulary */
.bd-k{color:var(--gold-2);font-weight:800;font-size:clamp(.55rem,1.2cqw,.85rem);letter-spacing:.14em;text-transform:uppercase}
.bd-h{font-size:clamp(.9rem,2.5cqw,1.7rem);font-weight:800;line-height:1.2;margin:.3em 0 .6em;color:#fff}
.bd-tbl{width:100%;border-collapse:collapse;font-size:clamp(.58rem,1.45cqw,1.05rem)}
.bd-tbl th,.bd-tbl td{border:1px solid var(--line);padding:.45em .65em;text-align:left;vertical-align:top;line-height:1.35}
.bd-tbl th{background:var(--navy-3);color:var(--gold-2);font-size:.9em;letter-spacing:.04em}
.bd-tbl tr:nth-child(even) td{background:rgba(255,255,255,.03)}
.bd-steps{list-style:none;display:grid;gap:.5em;margin-top:.4em;font-size:clamp(.62rem,1.6cqw,1.1rem)}
.bd-steps li{background:var(--navy-2);border:1px solid var(--line);border-radius:.7em;padding:.55em .8em;display:flex;gap:.7em;align-items:flex-start;line-height:1.4}
.bd-steps .n{flex:0 0 1.9em;height:1.9em;border-radius:50%;background:var(--gold);color:var(--ink);font-weight:800;display:grid;place-items:center;font-size:.9em}
.bd-quote{background:var(--navy-2);border-left:.4em solid var(--gold);padding:.7em .9em;border-radius:.5em;font-size:clamp(.66rem,1.7cqw,1.15rem);font-style:italic;color:#fff;margin:.5em 0;line-height:1.45}
.bd-note{margin-top:.7em;font-size:clamp(.58rem,1.4cqw,1rem);color:var(--muted)}
.bd-trap{display:inline-block;background:var(--red-bg);border:1px solid var(--red);color:#ffb3b0;padding:.1em .6em;border-radius:.4em;font-size:.85em;font-weight:800;letter-spacing:.06em}
.bd-ok{display:inline-block;background:var(--green-bg);border:1px solid var(--green);color:#b9f0d2;padding:.1em .6em;border-radius:.4em;font-size:.85em;font-weight:800}
.bd-grid{display:grid;grid-template-columns:1fr 1fr;gap:.8em;margin-top:.4em;font-size:clamp(.62rem,1.55cqw,1.1rem)}
.bd-box{background:var(--navy-2);border:1px solid var(--line);border-radius:.7em;padding:.65em .85em;line-height:1.45}
.bd-box b{color:var(--gold-2)}
.bd-flow{display:flex;align-items:center;gap:.5em;flex-wrap:wrap;margin:.6em 0;font-size:clamp(.6rem,1.45cqw,1.05rem)}
.bd-flow .fb{background:var(--navy-2);border:1px solid var(--gold);border-radius:.5em;padding:.45em .8em;font-weight:700}
.bd-flow .ar{color:var(--gold-2);font-size:1.4em}
.hl{color:var(--gold-2);font-weight:800}
.bd-opener{position:absolute;inset:0;font-size:clamp(.55rem,1.5cqw,1.05rem)}
.bd-opener img{width:100%;height:100%;object-fit:cover;filter:brightness(.78)}
.bubble{position:absolute;max-width:34%;background:rgba(247,243,232,.96);color:var(--ink);border-radius:.9em;padding:.6em .8em;font-size:clamp(.55rem,1.5cqw,1.05rem);line-height:1.35;box-shadow:0 8px 24px rgba(0,0,0,.45)}
.bubble b{display:block;color:var(--navy);font-size:.85em;letter-spacing:.06em;text-transform:uppercase;margin-bottom:.15em}
.bd-caption{position:absolute;left:0;right:0;bottom:0;padding:.8em 1.2em;background:linear-gradient(transparent,rgba(7,19,49,.95));font-weight:700;font-size:clamp(.6rem,1.6cqw,1.1rem)}

.prompter-wrap{background:var(--navy);border:1px solid var(--line);border-radius:14px;display:flex;flex-direction:column;min-height:0}
.prompter-head{display:flex;justify-content:space-between;padding:10px 14px;border-bottom:1px solid var(--line);font-size:.8rem;color:var(--gold-2);font-weight:700}
.prompter{padding:14px 16px;overflow-y:auto;font-size:1.06rem;line-height:1.85;flex:1;max-height:62vh;scroll-behavior:smooth}
.w{color:#8f9bbd;transition:color .15s;border-radius:4px;padding:0 1px}
.w.done{color:#dfe5f3}
.w.cur{background:var(--gold);color:var(--ink);font-weight:700}
.w.cue{border-bottom:1px dotted var(--gold)}

.controls{display:flex;align-items:center;gap:14px;margin-top:12px;background:var(--navy);border:1px solid var(--line);border-radius:12px;padding:10px 14px;flex-wrap:wrap}
.bar{flex:1;height:10px;background:var(--navy-2);border-radius:999px;cursor:pointer;min-width:160px;overflow:hidden}
.bar-fill{height:100%;width:0;background:linear-gradient(90deg,var(--gold),var(--gold-2))}
.time{font-variant-numeric:tabular-nums;color:var(--muted);font-size:.9rem}
.lock-tag{font-size:.78rem;color:#ffb3b0;background:var(--red-bg);border:1px solid var(--red);padding:3px 9px;border-radius:999px;font-weight:700}

.modal{position:fixed;inset:0;background:rgba(3,8,22,.9);display:grid;place-items:center;padding:18px;z-index:50}
.modal-card{background:var(--navy);border:2px solid var(--gold);border-radius:16px;padding:24px 26px;max-width:820px;width:100%;max-height:92vh;overflow:auto;box-shadow:0 30px 80px rgba(0,0,0,.7)}
.modal-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.role{background:rgba(212,167,44,.14);border:1px solid var(--gold);color:var(--gold-2);padding:3px 10px;border-radius:999px;font-size:.78rem;font-weight:800}
.locked{color:#ffb3b0;font-size:.78rem;font-weight:800;letter-spacing:.08em}
.scenario{background:var(--ink);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:10px 0;color:#e6ebf7}
.question{font-weight:800;margin:10px 0}
.options{display:grid;gap:8px}
.opt{display:flex;gap:10px;text-align:left;background:var(--navy-2);color:var(--cream);border:1px solid var(--line);border-radius:10px;padding:11px 13px;transition:.15s}
.opt:hover{border-color:var(--gold)}
.opt .k{flex:0 0 26px;height:26px;border-radius:50%;background:var(--navy-3);display:grid;place-items:center;font-weight:800;font-size:.8rem}
.opt.correct{background:var(--green-bg);border-color:var(--green)}
.opt.correct .k{background:var(--green);color:#fff}
.opt.wrong{background:var(--red-bg);border-color:var(--red);opacity:.85}
.opt.wrong .k{background:var(--red);color:#fff}
.opt:disabled{cursor:default}
.feedback{margin-top:12px;padding:12px 14px;border-radius:10px;font-size:.95rem}
.feedback.good{background:var(--green-bg);border:1px solid var(--green)}
.feedback.bad{background:var(--red-bg);border:1px solid var(--red)}
.modal-actions{text-align:right;margin-top:14px}

.test-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}
.score{font-size:1.4rem;font-weight:800;color:var(--gold-2);font-variant-numeric:tabular-nums}
.mcq{background:var(--ink);border:1px solid var(--line);border-radius:12px;padding:16px}
.mcq .q{font-weight:700;margin-bottom:12px;white-space:pre-line}
.mcq .tag{font-size:.72rem;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:6px}
.test-nav{display:flex;justify-content:space-between;align-items:center;margin-top:14px;gap:10px}
.review .item{border-top:1px solid var(--line);padding:12px 0;font-size:.92rem}
.review .item.ok .v{color:#9ee3bf}.review .item.no .v{color:#ffb3b0}
.weak{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.weak span{background:var(--red-bg);border:1px solid var(--red);padding:3px 10px;border-radius:999px;font-size:.8rem;font-weight:700}

@media (max-width:980px){
  .stage{grid-template-columns:1fr}
  .prompter{max-height:34vh}
  .top{gap:8px}
  .day-pill{margin-left:0}
  .bubble{max-width:46%}
}

.bubble.dim{opacity:.22;filter:grayscale(.6)}
.bubble.on{opacity:1;box-shadow:0 0 0 3px var(--gold),0 8px 24px rgba(0,0,0,.45);transform:scale(1.03)}
.bubble{transition:opacity .35s,transform .35s,box-shadow .35s}
.line{padding:.55em .8em;border-radius:.6em;margin-bottom:.5em;border:1px solid var(--line);color:#8f9bbd;transition:.25s}
.line b{display:block;color:var(--gold-2);font-size:.78em;letter-spacing:.08em;text-transform:uppercase;margin-bottom:.15em}
.line.on{background:var(--navy-2);color:#fff;border-color:var(--gold)}
.line.done{color:#dfe5f3}

.day-list{display:grid;gap:10px;margin-top:16px}
.day{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;background:var(--navy-2);border:1px solid var(--line);border-radius:12px;padding:12px 14px;text-decoration:none;color:var(--cream)}
.day:hover{border-color:var(--gold)}
.day.soon{opacity:.5;cursor:not-allowed}
.day .dn{grid-row:span 2;align-self:center;background:var(--gold);color:var(--ink);font-weight:800;border-radius:8px;padding:6px 10px;font-size:.85rem}
.day .dt{font-weight:700}
.day .dm{font-size:.8rem;color:var(--muted)}
#courseNav{cursor:pointer;margin-left:auto}
#courseNav + .day-pill{margin-left:0}

/* ---------- phone readability ---------- */
.fs-btn{padding:8px 12px;font-size:.85rem;white-space:nowrap}
.rotate-hint,.fs-hint{display:none}
@media (max-width:700px){
  main{padding:10px}
  .landing-card,.test-card{padding:18px 16px}
  .rotate-hint{display:block;margin-top:10px;background:rgba(212,167,44,.12);border:1px dashed var(--gold);color:var(--gold-2);border-radius:10px;padding:8px 12px;font-size:.88rem;font-weight:700}
  .modal{padding:10px}
  .modal-card{padding:16px 14px}
  .scenario{font-size:1.02rem;line-height:1.55}
  .question{font-size:1.08rem}
  .opt{font-size:1rem;padding:12px}
  .feedback{font-size:1rem}
  .mcq{padding:12px}
  .mcq .q{font-size:1.05rem}
}

/* ---------- full-screen (cinema) mode: board fills the screen, script and header hidden ---------- */
body.fs{overflow:hidden;background:#000}
body.fs .top,body.fs .prompter-wrap,body.fs .rotate-hint{display:none}
body.fs main{max-width:none;padding:0}
body.fs #lesson.active{position:fixed;inset:0;z-index:40;background:#000;display:grid;place-items:center}
body.fs .stage{display:block;gap:0;width:min(100vw,calc(100vh * 16 / 9));height:min(100vh,calc(100vw * 9 / 16))}
body.fs .stage{width:min(100vw,calc(100dvh * 16 / 9));height:min(100dvh,calc(100vw * 9 / 16))}
body.fs .board-wrap{width:100%;height:100%;aspect-ratio:auto;border:0;border-radius:0}
body.fs .controls{position:fixed;left:0;right:0;bottom:0;z-index:45;margin:0;border:0;border-radius:0;background:linear-gradient(transparent,rgba(3,8,22,.94) 40%);padding:16px 16px calc(10px + env(safe-area-inset-bottom,0px));transition:opacity .3s}
body.fs.hide-ctl .controls{opacity:0;pointer-events:none}
@media (max-width:1000px){ body.fs .lock-tag{display:none} }
@media (orientation:portrait) and (max-width:700px){
  body.fs .fs-hint{display:block;position:fixed;left:12px;right:12px;top:calc(12px + env(safe-area-inset-top,0px));z-index:46;text-align:center;background:rgba(212,167,44,.95);color:var(--ink);font-weight:800;border-radius:10px;padding:10px;font-size:.95rem}
}