/* Study Lab features (drawer, Test Zone, hub views, tour). Shell + base tokens: app.css. */
:root{
  --m:#2f55d4; --m-soft:#e6ecff; --m-ink:#1b358f;      /* ink blue */
  --sun:#ffc23d;                                       /* highlighter yellow: rewards */
  --mint:#10a37a; --mint-soft:#dcf5ec; --rose:#e5484d; --rose-soft:#fde5e5;
  --kid:var(--display);
}

.stars-row{color:var(--sun)}
.stars-row .off{color:#d6dbe8}

/* ── drawer ── */
.lab{width:420px;flex:0 0 420px;border-left:1px solid var(--line);background:var(--panel);display:flex;flex-direction:column;min-height:0}
.lab-h{display:flex;align-items:center;gap:8px;padding:12px 14px 0;font-family:var(--kid)}
.lab-h b{font-size:18px}
.lab-h small{color:var(--muted);font-size:12px}
.lab-h .x{margin-left:auto;border:0;background:none;font-size:20px;cursor:pointer;color:var(--muted)}
.lab-tabs{display:flex;gap:4px;padding:10px 12px;border-bottom:1px solid var(--line)}
.lab-tabs button{flex:1;font:600 13px var(--kid);padding:7px 4px;border-radius:10px;border:1px solid transparent;background:none;cursor:pointer;color:var(--muted)}
.lab-tabs button:hover{background:var(--hover)}
.lab-tabs button.on{background:var(--m-soft);color:var(--m-ink);border-color:color-mix(in srgb,var(--m) 28%,var(--line))}
.lab-body{flex:1;overflow:auto;padding:14px}
.lab-pane{display:flex;flex-direction:column;gap:12px;min-height:100%}
.lab-sec{display:flex;flex-direction:column;gap:6px}
.lab-lbl{font:600 14px var(--kid)}
.lab-lbl b{color:var(--m)}
.lab-in{font:inherit;width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}
.lab-in:focus,.ask textarea:focus,.answer textarea:focus{outline:2px solid color-mix(in srgb,var(--m) 35%,transparent);border-color:var(--m)}
.age{accent-color:var(--m);width:100%}
.age-ticks{display:flex;justify-content:space-between;font-size:17px;padding:0 2px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font:600 13px var(--kid);padding:5px 11px;border-radius:999px;border:1px solid var(--line);background:var(--panel);cursor:pointer;color:var(--text);text-align:left}
.chip:hover{border-color:var(--m)}
.chip.on{background:var(--m);color:#fff;border-color:var(--m)}
.chip.ghost{font-weight:500;background:var(--m-soft);border-color:transparent;color:var(--m-ink)}
.row{display:flex;align-items:center;gap:8px}
.row.center{justify-content:center}
.row.wrap{flex-wrap:wrap}
.row .sp{flex:1}
.btn{font:600 14px var(--kid);padding:8px 16px;border-radius:12px;border:1px solid var(--line);background:var(--panel);cursor:pointer;color:var(--text);transition:transform .1s}
.btn:hover{background:var(--hover)}
.btn:active{transform:scale(.97)}
.btn:disabled{opacity:.45;cursor:default}
.btn.primary{background:var(--m);border-color:var(--m);color:#fff;box-shadow:0 3px 0 var(--m-ink)}
.btn.primary:hover{background:var(--m-ink)}
.row .go{margin-left:auto}
.mini{font:12px var(--kid);border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:2px 9px;cursor:pointer}
.mini.on{background:var(--sun);border-color:var(--sun)}
.mini:disabled{cursor:default}
/* studio-voice Read aloud: "⏳ Preparing audio…" while the server makes the MP3 */
.mini.wait{background:var(--m-soft);border-color:transparent;color:var(--m-ink);opacity:1;animation:pulse 1.1s ease-in-out infinite alternate}
@media (prefers-reduced-motion:reduce){.mini.wait{animation:none}}
/* studio-voice Read aloud: the daily read-alouds note under it, and the "🔇 used up" state */
.ra{display:inline-flex;flex-direction:column;align-items:flex-end;gap:3px;max-width:100%}
.ra-note{font:11.5px/1.35 var(--kid);color:var(--muted);text-align:right;max-width:230px}
.mini.audio.spent{background:var(--hover);border-color:var(--line);color:var(--muted);cursor:not-allowed}
.mini.audio.wait{cursor:progress}
/* the read-aloud player: a dock that sticks to the bottom of the drawer while an explanation is read (Play/Pause, "Part 3 of
   9 - section" over a progress line by characters, Follow the voice, Stop). Tokens only, so it follows the theme. */
.ra-dock{position:sticky;bottom:-14px;z-index:3;display:flex;align-items:center;gap:10px;margin:12px -6px 0;padding:8px 10px;
  background:var(--panel);border:1px solid color-mix(in srgb,var(--m) 30%,var(--line));border-radius:14px;box-shadow:0 -4px 14px rgba(24,32,58,.10);font:600 13px/1.3 var(--kid);color:var(--text)}
.ra-pp{flex:0 0 auto;width:40px;height:40px;border-radius:50%;border:0;background:var(--m);color:#fff;font-size:16px;line-height:1;cursor:pointer;display:grid;place-items:center;box-shadow:0 2px 0 var(--m-ink)}
.ra-pp:hover{background:var(--m-ink)}
.ra-pp:active{transform:translateY(1px)}
.ra-info{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;align-items:stretch;gap:5px}
.ra-now{overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow-wrap:anywhere}
.ra-row{display:flex;align-items:center;gap:10px}
.ra-row .ra-line{flex:1 1 auto;min-width:0}
.ra-time{flex:0 0 auto;font:600 12px/1 var(--body);color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.ra-line{height:4px;border-radius:9px;background:var(--hover);overflow:hidden}
.ra-line i{display:block;height:100%;width:0;background:var(--m);border-radius:9px;transition:width .4s linear}
.ra-follow{display:flex;margin:-2px 0 -4px}
.ra-follow .kar-follow{font-size:12.5px;padding:2px 0}
.ra-x{flex:0 0 auto;align-self:flex-start;width:32px;height:32px;border-radius:50%;border:1px solid var(--line);background:var(--panel);color:var(--muted);cursor:pointer;font-size:13px;line-height:1}
.ra-x:hover{color:var(--text);background:var(--hover)}
/* the part being read: its sections (padding on every section, so lighting one never moves a line) and their chips */
.md .sec-block{margin:0 -8px;padding:6px 8px 1px;border-radius:10px;transition:background-color .3s,box-shadow .3s}
.md .sec-block > .sec-h{margin-top:4px}
.md .sec-block.reading{background:color-mix(in srgb,var(--m-soft) 60%,transparent);box-shadow:inset 3px 0 0 var(--m)}
.sec-index .chip.reading{border-color:var(--m);box-shadow:inset 0 0 0 1px var(--m)}
.sec-index .chip.reading::before{content:"\1F50A\A0"}
.sec-index .chip.reading::before{content:"\1F50A\A0" / ""}   /* (not part of the chip's name for a screen reader) */
/* "This explanation is in Hindi. Explain it in English?" (the language swap bar) */
.lang-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;margin:0 0 10px;padding:9px 12px;border-radius:12px;background:var(--m-soft);color:var(--m-ink);font:600 13.5px/1.35 var(--kid)}
.lang-bar .lb-msg{flex:1 1 200px;min-width:0;overflow-wrap:anywhere}
.lang-bar .lb-acts{display:flex;flex-wrap:wrap;gap:6px}
.lang-bar .mini{font-size:13px;padding:4px 11px;color:var(--text)}
.lang-bar .lb-go{background:var(--m);border-color:var(--m);color:#fff}
.lang-bar .lb-go:hover{background:var(--m-ink)}
/* words only screen readers get (lab.js announce(): the language bar's question) */
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;border:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.switch{display:flex;align-items:center;gap:8px;font:600 13px var(--kid);cursor:pointer;user-select:none}
.switch.small{font-weight:500;color:var(--muted)}
.switch input{display:none}
.switch i{width:34px;height:20px;border-radius:99px;background:#cfd5e3;position:relative;flex:0 0 34px;transition:background .2s}
.switch i::after{content:"";position:absolute;width:16px;height:16px;border-radius:50%;background:var(--panel);top:2px;left:2px;transition:left .2s}
.switch input:checked + i{background:var(--m)}
.switch input:checked + i::after{left:16px}

.out{border:1px dashed color-mix(in srgb,var(--m) 28%,var(--line));border-radius:14px;padding:14px;background:var(--panel);min-height:160px}
.hint-empty{color:var(--muted);font-size:14px}
.hint-empty b{color:var(--m-ink)}
.diff-head{display:flex;justify-content:space-between;align-items:center;gap:8px;font:600 12px var(--kid);color:var(--m);margin-bottom:8px;font-variant-numeric:tabular-nums}
.diff-head.done{color:var(--mint);flex-wrap:wrap}
.diff-head .acts{display:flex;flex-wrap:wrap;gap:6px}
.diff-head .speak-slot{margin-left:auto}
.diff-text{white-space:pre-wrap;font-size:14.5px;line-height:1.55}
.diff-text.noisy{color:var(--m-ink);background:linear-gradient(90deg,#fff 0%,var(--m-soft) 50%,#fff 100%);background-size:200% 100%;animation:shimmer 1.2s linear infinite;border-radius:8px}
@keyframes shimmer{to{background-position:-200% 0}}
.md{font-size:14.5px;line-height:1.55}
.md p{margin:0 0 8px}
.md h4{font:700 16px var(--kid);margin:12px 0 4px;color:var(--m-ink)}
.md ul,.md ol{margin:4px 0 8px;padding-left:20px}
.md code{background:var(--m-soft);padding:0 4px;border-radius:4px}
.md .verses{margin:0 0 8px}
.md .verses p{margin:0 0 12px;break-inside:avoid}
/* display:block: the dashboard's generic .cols grid (below) must not turn the stanzas into a 1.5fr/1fr grid */
.md .verses.cols{display:block;columns:2 17em;column-gap:36px;column-rule:1px dashed color-mix(in srgb,var(--m) 22%,var(--line))}
/* whole-chapter explanations: one block per # / ## section (md(..., {sections: true})) */
.md .sec-h{display:flex;align-items:flex-start;gap:8px;margin:16px 0 6px}
.md .sec-block:first-child .sec-h{margin-top:2px}
.md h3.sec{flex:1;min-width:0;margin:0;font:700 17px/1.3 var(--kid);color:var(--m-ink);scroll-margin-top:56px;overflow-wrap:anywhere}
.md h3.sec:focus{outline:none}
.md h3.sec:focus-visible{outline:2px solid color-mix(in srgb,var(--m) 45%,transparent);outline-offset:3px;border-radius:6px}
.mini.deeper{flex:0 0 auto;margin-top:1px;white-space:nowrap;color:var(--m-ink)}
.mini.deeper:hover{border-color:var(--m)}
/* the section chips: sticky at the top of the drawer while the explanation scrolls under them */
.sec-nav{position:sticky;top:-14px;z-index:2;background:var(--panel);margin:0 0 6px;padding:6px 0;border-bottom:1px solid var(--line)}
.sec-index{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch}
.sec-index::-webkit-scrollbar{display:none}
.sec-index .chip{flex:0 0 auto;white-space:nowrap;font-size:12.5px;padding:4px 10px}
.sec-sum{margin:0 0 8px;font:12.5px var(--kid);color:var(--muted)}
/* the sections after the head appear one by one when the magic is over, then the chips */
.sec-block.sec-in{animation:sec-rise .45s cubic-bezier(.2,.7,.3,1) both;animation-delay:calc(var(--i,0) * 110ms)}
.sec-nav.sec-in{animation:sec-fade .35s both;animation-delay:calc(var(--n,0) * 110ms + 150ms)}
@keyframes sec-rise{from{opacity:0;transform:translateY(10px)}}
@keyframes sec-fade{from{opacity:0}}
/* while the head is written: the other planned sections as grey rows */
.skel{display:flex;flex-direction:column;gap:7px;margin-top:12px}
.skel-lbl{font:600 12.5px var(--kid);color:var(--m)}
.skel-row{display:flex;align-items:center;gap:10px;padding:7px 10px;border-radius:10px;font:600 13px var(--kid);color:var(--muted);background:linear-gradient(90deg,var(--hover) 0%,var(--m-soft) 50%,var(--hover) 100%);background-size:200% 100%;animation:shimmer 1.6s linear infinite}
.skel-row span{flex:0 1 auto;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.skel-row::after{content:"";flex:1 1 40px;height:6px;border-radius:9px;background:color-mix(in srgb,var(--muted) 16%,transparent)}
/* "Go deeper": a personal card right under a section's heading */
.deeper-card{margin:6px 0 12px;border:2px solid var(--m-soft);border-radius:14px;padding:10px 12px;background:color-mix(in srgb,var(--m-soft) 30%,var(--panel))}
.deeper-card.live{border-style:dashed}
.deeper-h{display:flex;align-items:center;flex-wrap:wrap;gap:6px;margin-bottom:6px;font:700 13.5px var(--kid);color:var(--m-ink)}
.deeper-h b{flex:1 1 140px;min-width:0;overflow-wrap:anywhere}
.deeper-card .loader{padding:12px 6px}
.deeper-wait{color:var(--muted);font:600 13px var(--kid);animation:pulse 1s ease-in-out infinite alternate}
.cut-note{margin:10px 0 0;font:12.5px var(--kid);color:var(--muted)}
@media (prefers-reduced-motion:reduce){.sec-block.sec-in,.sec-nav.sec-in,.skel-row,.deeper-wait{animation:none}}

.lab-warn{background:#fff6dc;border:1px solid #f3d27a;border-radius:12px;padding:10px 12px;font-size:13px;margin-bottom:12px}
.lab-err{background:var(--rose-soft);border:1px solid #f6b3c4;border-radius:12px;padding:10px 12px;font-size:13px;margin-bottom:10px;word-break:break-word}
.lab-warn code,.lab-err code{background:rgba(0,0,0,.06);padding:0 4px;border-radius:4px}

/* loader */
.loader{display:flex;align-items:center;gap:14px;padding:28px 10px;justify-content:center;font-family:var(--kid)}
.loader b{font-size:16px}
.orb{width:38px;height:38px;border-radius:50%;background:conic-gradient(var(--m),var(--rose),var(--sun),var(--mint),var(--m));animation:spin 1s linear infinite;-webkit-mask:radial-gradient(circle,transparent 9px,#000 10px);mask:radial-gradient(circle,transparent 9px,#000 10px)}
@keyframes spin{to{transform:rotate(360deg)}}
.shimmer{animation:pulse 1s ease-in-out infinite alternate}
@keyframes pulse{to{opacity:.4}}

/* buddy */
.chat{display:flex;flex-direction:column;gap:10px;flex:1}
.msg{display:flex;gap:8px;align-items:flex-end}
.msg.user{justify-content:flex-end}
.msg .av{font-size:24px;line-height:1}
.msg .b{max-width:85%;padding:9px 12px;border-radius:16px;font-size:14.5px;background:var(--m-soft);border-bottom-left-radius:4px}
.msg.user .b{background:var(--m);color:#fff;border-radius:16px;border-bottom-right-radius:4px}
.msg .b .md p:last-child{margin-bottom:0}
.msg.typing .b{animation:pulse .8s infinite alternate}
.msg .meta{display:flex;gap:8px;align-items:center;margin-top:6px;font-size:11px;color:var(--m)}
.starters{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,250px),1fr));gap:8px}
.starters .chip{display:flex;align-items:center;width:100%;min-height:42px;padding:9px 14px;border-radius:14px;font-size:14px;line-height:1.3;text-align:left}
.ask{display:flex;gap:6px;align-items:flex-end;position:sticky;bottom:-14px;background:var(--panel);padding:8px 0 2px}
.ask textarea,.answer textarea{flex:1;font:inherit;font-size:14.5px;resize:none;padding:9px 12px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.answer textarea{width:100%;font-size:16px;line-height:1.5}
.mic{border:1px solid var(--line);background:var(--panel);border-radius:12px;font-size:17px;padding:6px 9px;cursor:pointer}
.mic.on{background:var(--rose);animation:pulse .6s infinite alternate}

/* flashcards */
.intro-card{text-align:center;padding:24px 10px;font-family:var(--kid)}
.intro-card .big{font-size:56px}
.intro-card h3{margin:4px 0;font-size:22px}
.intro-card p{color:var(--muted);font-size:14px;margin:0 0 16px}
.deck-top{display:flex;align-items:center;gap:10px;font:600 13px var(--kid);color:var(--muted)}
.pbar{flex:1;height:8px;border-radius:99px;background:var(--hover);overflow:hidden}
.pbar i{display:block;height:100%;background:var(--mint);transition:width .4s}
.flip{perspective:1000px;height:250px;cursor:pointer}
.flip-in{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flip.flipped .flip-in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;border-radius:20px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;text-align:center;font-family:var(--kid)}
.face.front{background:linear-gradient(135deg,var(--m),#6b8bf5);color:#fff;box-shadow:0 8px 24px rgba(47,85,212,.3)}
.face.back{background:var(--panel);border:3px solid var(--mint);transform:rotateY(180deg)}
.face .em{font-size:44px}
.face p{font-size:19px;font-weight:600;margin:8px 0;line-height:1.3}
.face.back p{font-size:17px;font-weight:500}
.face small{opacity:.7}
.face .card-sec{position:absolute;top:12px;left:18px;right:18px;font:600 11.5px/1.3 var(--kid);opacity:.85;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ── Test Zone ── */
.quiz-panel{padding:28px 32px}
.tz{max-width:900px;margin:0 auto;font-family:var(--kid)}
.tz-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.tz-head .tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;color:var(--m-ink);background:var(--m-soft);padding:3px 10px;border-radius:999px}
.tz-head h2{margin:8px 0 2px;font-size:28px;line-height:1.15}
.tz-head p{margin:0;color:var(--muted)}
.tz-mastery{text-align:right;font-size:28px}
.tz-mastery small{display:block;font-size:13px;color:var(--muted)}
.modes{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.mode{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:20px;display:flex;flex-direction:column;gap:10px;position:relative;overflow:hidden;transition:transform .2s,box-shadow .2s}
.mode:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,.08)}
.mode::before{content:"";position:absolute;inset:0 0 auto;height:6px}
.mode.m1::before{background:var(--m)} .mode.m2::before{background:var(--sun)} .mode.m3::before{background:var(--mint)}
.mode .mi{font-size:40px}
.mode h3{margin:0;font-size:22px}
.mode p{margin:0;color:var(--muted);font-size:14px;line-height:1.4;font-family:var(--body)}
.mode .btn{margin-top:auto}
.mini-list{margin:0;padding-left:18px;font-size:13px;color:var(--text)}
.seg{display:flex;background:var(--hover);border-radius:12px;padding:3px}
.seg button{flex:1;font:600 13px var(--kid);border:0;background:none;padding:6px;border-radius:9px;cursor:pointer;color:var(--muted)}
.seg button.on{background:var(--panel);color:var(--text);box-shadow:0 1px 3px rgba(0,0,0,.12)}

.qq{max-width:720px;margin:0 auto}
.qq-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.dots{display:flex;gap:6px;flex:1;flex-wrap:wrap}
.dots i{width:14px;height:14px;border-radius:50%;background:var(--line)}
.dots i.cur{background:var(--m);box-shadow:0 0 0 4px var(--m-soft)}
.dots i.ok{background:var(--mint)} .dots i.no{background:var(--rose)}
.qq-xp{font-weight:700;color:var(--m-ink)}
.qq-card,.lr-card{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:26px}
.qq-kind,.lr-meta{font-size:13px;color:var(--muted);display:flex;gap:8px;justify-content:space-between;flex-wrap:wrap}
.qq-card h3,.lr-card h3{font-size:23px;line-height:1.3;margin:10px 0 18px}
.qq-opts{display:grid;gap:10px}
.qq-opts.tf{grid-template-columns:1fr 1fr}
.qq-opts button{font:500 17px var(--kid);text-align:left;padding:12px 16px;border-radius:14px;border:2px solid var(--line);background:var(--panel);cursor:pointer;display:flex;align-items:center;gap:12px;position:relative;transition:transform .1s,border-color .15s}
.qq-opts button:hover:not(:disabled){border-color:var(--m);transform:translateX(3px)}
.qq-opts kbd{font:700 12px var(--kid);background:var(--hover);border-radius:6px;padding:1px 7px;color:var(--muted)}
.qq-opts button.right{border-color:var(--mint);background:var(--mint-soft)}
.qq-opts button.wrong{border-color:var(--rose);background:var(--rose-soft)}
.qq-opts button:disabled{cursor:default;color:var(--text)}
.qq-hint{margin-top:12px;padding:10px 14px;background:#fff6dc;border-radius:12px;font-size:15px}
.qq-fb{margin-top:14px;padding:12px 16px;border-radius:14px;font-size:15px;line-height:1.45}
.qq-fb.ok{background:var(--mint-soft)} .qq-fb.no{background:var(--rose-soft)}
.qq-card .row{margin-top:16px}
.plus{position:absolute;right:14px;font-weight:800;color:var(--mint);animation:rise .8s forwards}
@keyframes rise{to{transform:translateY(-24px);opacity:0}}

.results{max-width:720px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:26px}
.big-score{display:flex;align-items:center;gap:22px;margin-bottom:12px}
.big-score h3{margin:4px 0;font-size:22px}
.big-score p{margin:0;color:var(--muted)}
.ring{--p:0;width:120px;height:120px;flex:0 0 120px;border-radius:50%;display:grid;place-content:center;text-align:center;background:radial-gradient(closest-side,var(--panel) 78%,transparent 80%),conic-gradient(var(--mint) calc(var(--p)*1%),var(--hover) 0)}
.ring.bolt{background:radial-gradient(closest-side,var(--panel) 78%,transparent 80%),conic-gradient(var(--sun) calc(var(--p)*1%),var(--hover) 0)}
.ring b{font-size:28px;line-height:1}
.ring small{color:var(--muted)}
.res-stars{font-size:30px}
.results h4{margin:18px 0 8px}
.review{display:grid;gap:8px}
.rv{border:1px solid var(--line);border-radius:14px;padding:10px 14px;display:flex;flex-direction:column;gap:2px;font-size:14px}
.rv .no{color:var(--rose)} .rv .ok{color:#0b8a66}
.rv small{color:var(--muted)}
.results > .row{margin-top:18px}
.coach{margin-top:16px;border:2px solid var(--m-soft);border-radius:16px;padding:14px 16px;background:#f8faff}
.coach-h{display:flex;gap:10px;align-items:center;font-weight:700;color:var(--m-ink);margin-bottom:8px}
.coach .row{margin-top:10px}
.ai-fact{background:var(--m-soft);border-radius:14px;padding:12px 16px;font-size:15px;margin-top:8px}

/* lightning */
.lr{max-width:720px;margin:0 auto}
.lr-hud{display:flex;align-items:center;gap:18px;margin-bottom:14px;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:10px 16px}
.timer{position:relative;width:62px;height:62px}
.timer svg{width:100%;height:100%;transform:rotate(-90deg)}
.timer circle{fill:none;stroke:var(--hover);stroke-width:3.5}
.timer circle.t{stroke:var(--sun);stroke-dasharray:100.5;stroke-dashoffset:0;stroke-linecap:round;transition:stroke .3s}
.timer.low circle.t{stroke:var(--rose)}
.timer b{position:absolute;inset:0;display:grid;place-content:center;font-size:22px}
.timer.low b{color:var(--rose);animation:pulse .5s infinite alternate}
.hud-stat small{display:block;color:var(--muted);font-size:12px}
.hud-stat b{font-size:24px;font-variant-numeric:tabular-nums}
.lv{display:flex;gap:3px;align-items:flex-end;height:26px}
.lv i{width:9px;border-radius:3px;background:var(--hover)}
.lv i:nth-child(1){height:30%}.lv i:nth-child(2){height:45%}.lv i:nth-child(3){height:60%}.lv i:nth-child(4){height:80%}.lv i:nth-child(5){height:100%}
.lv i.on{background:linear-gradient(var(--rose),var(--sun))}
.lr-card{min-height:330px}
.lr-foot{margin-top:12px;justify-content:center}
.countdown{font-size:80px;font-weight:800;text-align:center;padding-top:80px;color:var(--m);animation:pop .5s}
.writing{text-align:center;padding:120px 0;color:var(--m);font-weight:700;animation:pulse .6s infinite alternate}
.shake{animation:shake .35s}
@keyframes shake{25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}
.pop{animation:pop .35s cubic-bezier(.2,1.4,.5,1)}
@keyframes pop{from{transform:scale(.94);opacity:0}}

/* teach the robot */
.teach{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.bolt-row{display:flex;gap:14px;align-items:flex-start}
.bolt{font-size:64px;line-height:1;animation:bob 2s ease-in-out infinite}
.bolt.happy{animation:bounce .6s ease-in-out 3}
@keyframes bob{50%{transform:translateY(-6px) rotate(-4deg)}}
@keyframes bounce{50%{transform:translateY(-18px) scale(1.1)}}
.speech{position:relative;background:var(--panel);border:2px solid var(--mint);border-radius:20px;padding:14px 18px;font-size:18px;line-height:1.4;flex:1}
.speech::before{content:"";position:absolute;left:-10px;top:22px;width:16px;height:16px;background:var(--panel);border-left:2px solid var(--mint);border-bottom:2px solid var(--mint);transform:rotate(45deg)}
.concepts{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.concept{font:600 17px var(--kid);padding:16px;border-radius:16px;border:2px solid var(--line);background:var(--panel);cursor:pointer;text-align:left}
.concept:hover{border-color:var(--mint);background:var(--mint-soft)}
.own{display:flex;gap:8px}
.own .btn{white-space:nowrap}
.answer{display:flex;flex-direction:column;gap:10px}
.wc{color:var(--muted);font-size:13px}
.grade{text-align:center;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:18px}
.grade b{display:block;font-size:19px;margin-top:4px}
.grade small{color:var(--muted)}
.gstars span{font-size:44px;color:#dfe3ee;display:inline-block}
.gstars span.on{color:var(--sun);animation:star .5s var(--d) both}
@keyframes star{from{transform:scale(0) rotate(-90deg)}70%{transform:scale(1.3)}}
.gcols{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.gc{border-radius:16px;padding:12px 16px;font-size:15px}
.gc h4{margin:0 0 6px}
.gc ul{margin:0;padding-left:18px}
.gc p{margin:0}
.gc.ok{background:var(--mint-soft)} .gc.add{background:#fff6dc} .gc.mis{background:var(--rose-soft)}

/* toasts, confetti, modal */
#toasts{position:fixed;right:18px;bottom:18px;display:flex;flex-direction:column;gap:8px;z-index:50;pointer-events:none}
.toast{background:var(--text);color:#fff;border-radius:14px;padding:10px 16px;font-family:var(--kid);box-shadow:0 8px 24px rgba(0,0,0,.2);animation:pop .3s;transition:opacity .4s,transform .4s;max-width:320px}
.toast b{display:block}
.toast span{font-size:13px;opacity:.8}
.toast.big{background:linear-gradient(135deg,var(--m),var(--rose));font-size:17px}
.toast.info{background:var(--m-ink)}
.toast.out{opacity:0;transform:translateY(10px)}
.confetti{position:fixed;width:9px;height:14px;border-radius:2px;z-index:60;pointer-events:none;animation:conf 1.3s cubic-bezier(.2,.6,.4,1) forwards}
@keyframes conf{to{transform:translate(var(--dx),calc(var(--dy) + 320px)) rotate(var(--r));opacity:0}}
.modal{position:fixed;inset:0;background:rgba(30,25,20,.45);display:grid;place-items:center;z-index:70;padding:16px}
.modal-card{background:var(--panel);border-radius:22px;padding:22px;max-width:560px;width:100%;font-family:var(--kid);max-height:90vh;overflow:auto}
.modal-card h3{margin:0 0 12px;font-size:22px}
.modal-card > .btn{margin-top:14px}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.badge{border:1px solid var(--line);border-radius:14px;padding:12px;text-align:center;display:flex;flex-direction:column}
.badge span{font-size:34px}
.badge small{color:var(--muted);font-size:12px}
.badge.locked{filter:grayscale(1);opacity:.45}

@media (max-width:1100px){
  .lab{position:fixed;right:0;top:0;bottom:0;z-index:40;box-shadow:-10px 0 30px rgba(0,0,0,.15);width:min(420px,100vw);padding-top:env(safe-area-inset-top,0px)}
}
@media (max-width:760px){
  .quiz-panel{padding:16px}
  .tz-head h2{font-size:22px}
  .qq-card,.lr-card,.results{padding:18px}
  .qq-card h3,.lr-card h3{font-size:19px}
  .big-score{flex-direction:column;text-align:center}
  .lr-hud{gap:10px;padding:8px 10px}
}

/* guided tour */
.tour{position:fixed;inset:0;z-index:80}
.tour-block{position:absolute;inset:0}
.tour-spot{position:fixed;border-radius:16px;pointer-events:none;box-shadow:0 0 0 4px var(--sun),0 0 0 9999px rgba(24,18,48,.62);transition:left .35s cubic-bezier(.3,1.15,.5,1),top .35s cubic-bezier(.3,1.15,.5,1),width .35s,height .35s}
.tour-spot::after{content:"";position:absolute;inset:-4px;border-radius:18px;border:3px solid var(--sun);animation:ring 1.4s ease-out infinite}
@keyframes ring{to{inset:-16px;opacity:0;border-radius:26px}}
.tour.no-target .tour-spot{box-shadow:0 0 0 9999px rgba(24,18,48,.62)}
.tour.no-target .tour-spot::after{display:none}
.tour-card{position:fixed;width:min(340px,calc(100vw - 24px));background:var(--panel);border-radius:22px;padding:16px 20px 18px;font-family:var(--kid);box-shadow:0 20px 50px rgba(0,0,0,.3);transition:left .35s cubic-bezier(.3,1.15,.5,1),top .35s cubic-bezier(.3,1.15,.5,1),opacity .2s}
.tour-card.busy{opacity:.55}
.tour-top{display:flex;align-items:center;gap:10px}
.tour-emoji{font-size:34px;line-height:1;animation:bob 2s ease-in-out infinite}
.tour-count{font-size:12px;font-weight:700;color:var(--m);background:var(--m-soft);border-radius:999px;padding:2px 9px}
.tour-x{margin-left:auto;font:600 12px var(--kid);border:0;background:none;color:var(--muted);cursor:pointer}
.tour-x:hover{color:var(--text)}
.tour-card h3{margin:10px 0 4px;font-size:21px;line-height:1.2}
.tour-card p{margin:0;font-size:15px;line-height:1.45;color:var(--text)}
.tour-card p b{color:var(--m-ink)}
.tour-dots{display:flex;gap:4px;margin:14px 0 12px}
.tour-dots i{flex:1;height:5px;border-radius:9px;background:var(--hover);transition:background .3s}
.tour-dots i.past{background:color-mix(in srgb,var(--m) 35%,var(--line))}
.tour-dots i.on{background:var(--m)}
.tour-nav{display:flex;justify-content:space-between;gap:8px}

.muted{color:var(--muted)} .small{font-size:13px}

/* ── dashboard ── */
.dash{max-width:1040px;margin:0 auto;font-family:var(--kid);display:flex;flex-direction:column;gap:16px}
.dash-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap}
.dash-head .tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;color:var(--m-ink);background:var(--m-soft);padding:3px 10px;border-radius:999px}
.dash-head h2{margin:8px 0 2px;font-size:28px}
.dash-head p{margin:0;color:var(--muted);max-width:640px}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.tile{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:14px 16px;display:flex;flex-direction:column}
.tile small{color:var(--muted);font-size:13px}
.tile b{font-size:34px;line-height:1.1;font-variant-numeric:tabular-nums}
.tile span{font-size:13px;color:var(--text)}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:16px 18px;margin-bottom:16px}
.panel h3{margin:0 0 12px;font-size:18px;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.panel h3 small{font-size:13px;font-weight:500;color:var(--muted)}
.cols{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:16px;align-items:start}
.cols .panel{margin-bottom:16px}
.ai-box{background:#f8faff;border:2px solid var(--m-soft);border-radius:20px;padding:14px 18px}
.bars{position:relative;display:grid;grid-template-columns:repeat(14,1fr);gap:2px;height:170px;padding-top:6px;border-bottom:1px solid var(--line)}
.bars-max{position:absolute;left:0;top:-4px;font-size:11px;color:var(--muted)}
.bar-col{position:relative;display:flex;flex-direction:column;align-items:center;outline:0}
.bar-area{flex:1;width:100%;display:flex;align-items:flex-end;justify-content:center}
.bar-area i{display:block;width:min(70%,28px);background:var(--m);border-radius:4px 4px 0 0;transition:height .5s}
.bar-col:hover .bar-area i,.bar-col:focus .bar-area i{background:var(--m-ink)}
.bar-x{font-size:11px;color:var(--muted);margin-top:4px;position:absolute;bottom:-20px}
.bar-dot{position:absolute;bottom:-38px;font-size:11px}
.bars{margin-bottom:40px}
.tip{display:none;position:absolute;bottom:calc(100% + 4px);left:50%;transform:translateX(-50%);background:var(--text);color:#fff;border-radius:10px;padding:6px 10px;font-size:12px;white-space:nowrap;z-index:5;pointer-events:none}
.bar-col:hover .tip,.bar-col:focus .tip{display:block}
.topics{display:flex;flex-direction:column;gap:8px}
.topic{display:grid;grid-template-columns:minmax(0,1fr) 170px auto;gap:12px;align-items:center;padding:10px 12px;border:1px solid var(--line);border-radius:14px}
.t-main b{display:block;font-size:15px}
.t-main small,.t-acc small{color:var(--muted);font-size:12px;display:block}
.st{font-size:12px;font-weight:700}
.accbar{height:6px;border-radius:9px;background:var(--hover);margin-top:4px;overflow:hidden}
.accbar i{display:block;height:100%;border-radius:9px}
.accbar i.serious{background:#e5484d} .accbar i.warning{background:#f5a524} .accbar i.good{background:#30a46c}
.mini-btn{font-size:13px;padding:5px 10px;white-space:nowrap}
.strong{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.strong li{display:flex;flex-direction:column;padding:8px 12px;background:var(--mint-soft);border-radius:12px}
.strong small{color:var(--muted);font-size:12px}
.boxes{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.mbox{border:1px solid var(--line);border-radius:12px;padding:8px 4px;text-align:center;display:flex;flex-direction:column}
.mbox b{font-size:22px}
.mbox small{font-weight:700;font-size:12px}
.mbox span{font-size:11px;color:var(--muted)}
.table-wrap{overflow-x:auto}
.chap-table{width:100%;border-collapse:collapse;font-size:14px}
.chap-table th{text-align:left;font-size:12px;color:var(--muted);font-weight:600;padding:6px 8px;border-bottom:1px solid var(--line);white-space:nowrap}
.chap-table td{padding:8px;border-bottom:1px solid var(--line);vertical-align:middle;font-variant-numeric:tabular-nums}
.chap-table td small{display:block;color:var(--muted);font-size:12px}
.dash-foot{text-align:right}
.dash-foot .btn{font-size:13px;color:var(--muted)}

/* -- Parents -> Activity: day picker, filters, the day's numbers and a timeline with times (lab/activity.js) -- */
.act h3 .act-share{margin-left:auto}
.act-link{background:var(--m-soft);border-radius:14px;padding:10px 12px;margin:0 0 12px}
.act-link p{margin:0 0 6px}
.act-link-row{display:flex;gap:8px}
.act-link-row input{flex:1;min-width:0;font:14px var(--body);padding:6px 10px;border:1px solid var(--line);border-radius:10px;background:var(--panel);color:var(--text)}
.act-link .act-off{margin-top:6px;font-size:13px}
.act-link-msg{display:block;font-size:13px;color:var(--m-ink);min-height:1em;margin-top:4px}
.act-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:10px}
.act-days{flex:0 1 auto}
.act-days button{padding:6px 12px;white-space:nowrap}
.act-date{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:6px}
.act-date input{font:14px var(--body);padding:5px 8px;border:1px solid var(--line);border-radius:10px;background:var(--panel);color:var(--text)}
.act-filters{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.act-ai{background:color-mix(in srgb,var(--m) 7%,var(--panel));border:1px solid color-mix(in srgb,var(--m) 22%,var(--line));border-radius:14px;padding:12px 16px;margin-bottom:12px;line-height:1.45}
.act-ai h4{margin:0 0 6px;font-size:17px;text-wrap:balance}
.act-ai p{margin:0 0 8px;font-size:15px;max-width:75ch}
.act-ai-wait{color:var(--muted);font-size:14px;margin:0!important}
.act-ai-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:6px 18px;margin-bottom:6px}
.act-ai-list b{font-size:13px;letter-spacing:.02em;color:var(--muted)}
.act-ai-list ul{margin:2px 0 0;padding-left:18px;font-size:14px}
.act-ai-list li{margin:2px 0}
.act-tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:8px;margin-bottom:10px}
.act-tiles .tile{padding:10px 12px;border-radius:14px}
.act-tiles .tile b{font-size:26px}
.act-quiz{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:14px;margin-bottom:12px}
.act-quiz i{font-style:normal;color:var(--muted)}
.act-day h4{margin:14px 0 6px;font-size:16px;display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px}
.act-day h4 small{font-size:13px;font-weight:500;color:var(--muted)}
.act-tl{list-style:none;margin:0;padding:0;border-left:2px solid var(--line);margin-left:58px}
.act-ev{position:relative;display:flex;gap:8px;align-items:flex-start;padding:5px 0 5px 10px;font-size:14px;line-height:1.35}
.act-ev time{position:absolute;left:-66px;width:56px;text-align:right;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;padding-top:2px}
.act-ic{flex:0 0 22px;text-align:center}
.act-tx{min-width:0;overflow-wrap:anywhere}
.act-tx b{font-weight:600}
.act-more{display:block;font-size:12.5px;color:var(--muted)}
.act-ev.sub{font-size:13px;padding-top:2px;padding-bottom:2px}
.act-ev.sub .act-tx b{font-weight:500}
.act-remote{padding-top:8px}
/* the read-only page for a grown-up's phone: no child's top-bar controls */
.remote-view .mainnav,.remote-view .tb-right{display:none}
@media (max-width:560px){
  .act-tl{margin-left:0;border-left:0}
  .act-ev{flex-wrap:wrap;padding-left:0}
  .act-ev time{position:static;width:auto;text-align:left;flex:0 0 100%;padding:0}
  .act-days{width:100%}
}

/* ── daily revision ── */
.start-card{background:var(--panel);border:1px solid var(--line);border-radius:22px}
.dtimer{display:flex;align-items:center;gap:10px;flex:1}
.dtimer b{font-size:22px;font-variant-numeric:tabular-nums;min-width:56px}
.dt-bar{flex:1;height:8px;border-radius:99px;background:var(--hover);overflow:hidden}
.dt-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--mint),var(--m));border-radius:99px}
.chip-ch{background:var(--m-soft);color:var(--m-ink);border-radius:999px;padding:1px 10px;font-weight:600}
.srs-note{display:block;margin-top:6px;color:var(--muted)}

/* ── duel ── */
.modes{grid-template-columns:repeat(2,minmax(0,1fr))}
@media (max-width:640px){.modes{grid-template-columns:1fr}}
.mode.m4::before{background:var(--rose)}
.duel-setup{max-width:760px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:22px;display:flex;flex-direction:column;gap:14px;text-align:center}
.duel-setup h3{margin:0;font-size:26px}
.duel-setup p{margin:0}
.players{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center}
.vs{font-weight:800;font-size:22px;color:var(--rose)}
.pl-card{border-radius:18px;padding:14px;display:flex;flex-direction:column;gap:8px;align-items:center}
.pl-card.p1{background:#eaf2ff} .pl-card.p2{background:#ffece8}
.pl-av{font-size:46px;line-height:1}
.pl-name{text-align:center;font-weight:700}
.av-pick{display:flex;flex-wrap:wrap;justify-content:center;gap:2px}
.av-pick button{font-size:20px;border:2px solid transparent;background:none;border-radius:10px;cursor:pointer;padding:2px}
.av-pick button.on{border-color:var(--text);background:var(--panel)}
.pl-keys{font-size:12px;color:var(--muted)}
.pl-keys kbd,.pad kbd{font:700 11px var(--kid);background:var(--panel);border:1px solid var(--line);border-radius:5px;padding:0 5px;margin-left:2px}
.duel{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.duel-score{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:10px}
.ds{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:18px}
.ds.p1{background:#eaf2ff} .ds.p2{background:#ffece8;justify-content:flex-end;text-align:right}
.ds .av{font-size:36px}
.ds b{display:block}
.ds .pts{font-size:30px;font-weight:800;font-variant-numeric:tabular-nums}
.ds-mid{text-align:center}
.ds-mid small{display:block;color:var(--muted)}
.duel-timer{height:8px;border-radius:99px;background:var(--hover);overflow:hidden}
.duel-timer i{display:block;height:100%;width:100%;background:var(--sun);border-radius:99px}
.duel-timer i.low{background:var(--rose)}
.duel-q{min-height:250px}
.duel-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.dopt{display:flex;gap:10px;align-items:center;border:2px solid var(--line);border-radius:14px;padding:12px 14px;font-size:17px;background:var(--panel)}
.dopt span{font-size:22px;color:var(--m)}
.dopt.right{border-color:var(--mint);background:var(--mint-soft)}
.duel-msg{margin-top:12px;font-size:15px;min-height:22px}
.duel-msg b{display:block;font-size:18px}
.duel-pads{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pad{border-radius:18px;padding:10px;transition:opacity .2s}
.pad.p1{background:#eaf2ff} .pad.p2{background:#ffece8}
.pad-h{font-weight:700;margin-bottom:8px;text-align:center}
.pad-btns{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.pad-btns button{font:700 26px var(--kid);padding:12px 0;border-radius:14px;border:2px solid transparent;background:var(--panel);cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px;box-shadow:0 3px 0 rgba(0,0,0,.08)}
.pad-btns button:active{transform:translateY(2px)}
.pad-btns button.right{background:var(--mint-soft);border-color:var(--mint)}
.pad-btns button.wrong{background:var(--rose-soft);border-color:var(--rose)}
.pad.locked{opacity:.5}
.pad.won{box-shadow:0 0 0 3px var(--sun)}
.duel-end{text-align:center}
.trophy{font-size:70px;animation:bounce .7s ease-in-out 3}
.final{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0}
.fp{border:1px solid var(--line);border-radius:18px;padding:14px;display:flex;flex-direction:column;align-items:center}
.fp.win{border:3px solid var(--sun);background:#fff8e3}
.fp .av{font-size:40px}
.fp .big{font-size:40px;font-weight:800}
.fp small{color:var(--muted)}
@media (max-width:760px){
  .cols{grid-template-columns:1fr}
  .topic{grid-template-columns:1fr}
  .duel-opts{grid-template-columns:1fr}
  .players{grid-template-columns:1fr}
}
.st.neutral{color:var(--muted);font-weight:600}
.deck-foot{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-top:4px}