/* Study Lab app shell.
   Layout: sticky top bar, centred pages (home bookshelf, book chapter list, hub), and a
   full-bleed reader with the Study Lab drawer. Look: an Indian school notebook, with ink-blue
   type and accents, a highlighter-yellow for rewards, ruled paper and a red margin line on the
   greeting, and books drawn as NCERT-style covers in their subject colour. */
:root{
  --bg:#f4f6fb;          /* paper, faintly blue */
  --panel:#ffffff;       /* cards and bars */
  --line:#e2e6f0;
  --text:#18203a;        /* ink */
  --muted:#636d88;
  --hover:#edf0f8;
  --rule:#d9e3f6;        /* notebook ruling */
  --margin:#ef5b5b;      /* notebook margin line */
  --display:"Baloo 2","Noto Sans Devanagari",ui-rounded,system-ui,sans-serif;
  --body:"Mukta","Noto Sans Devanagari",system-ui,-apple-system,"Segoe UI",sans-serif;
  --radius:16px;
  --shadow:0 1px 2px rgba(24,32,58,.06),0 6px 20px rgba(24,32,58,.06);
  --top:64px;
  --ok-ink:#087a5a;      /* "verified" text: AA contrast on paper and white */
  --bad-ink:#c0262d;     /* error text: AA contrast on paper and white */
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-padding-top:var(--top)}
/* The whole page is a sheet of ruled notebook paper, with the red margin line just left of the content column. */
body{margin:0;font:16px/1.5 var(--body);color:var(--text);-webkit-font-smoothing:antialiased;background:
    linear-gradient(90deg,transparent 0 calc(max(16px,(100vw - 1180px)/2) - 18px),var(--margin) 0 calc(max(16px,(100vw - 1180px)/2) - 16px),transparent 0),
    repeating-linear-gradient(180deg,transparent 0 31px,var(--rule) 31px 32px),var(--bg)}
h1,h2,h3{font-family:var(--display);line-height:1.15;text-wrap:balance;margin:0}
a{color:inherit}
:focus-visible{outline:3px solid color-mix(in srgb,var(--m) 55%,transparent);outline-offset:2px;border-radius:8px}
.eyebrow{margin:0;font:600 13px/1.3 var(--body);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.lede{margin:0;color:var(--muted);font-size:17px}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* ── top bar ── */
.topbar{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--panel) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.topbar-in{height:var(--top);display:flex;align-items:center;gap:20px;padding-inline:max(16px,env(safe-area-inset-left,0px)) max(16px,env(safe-area-inset-right,0px))}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font:700 21px var(--display);color:var(--text);white-space:nowrap}
.logo-mark{width:30px;height:30px;border-radius:9px;background:var(--m);position:relative;flex:0 0 30px;box-shadow:inset -5px 0 0 rgba(0,0,0,.18)}
.logo-mark::before{content:"";position:absolute;left:8px;right:6px;top:8px;height:3px;border-radius:2px;background:#fff;box-shadow:0 6px 0 #fff,0 12px 0 var(--sun)}
.mainnav{display:flex;align-items:center;gap:4px}
.mainnav a,.hub-nav a{display:inline-flex;align-items:center;gap:6px;text-decoration:none;font-weight:600;font-size:15px;color:var(--muted);padding:7px 12px;border-radius:10px}
.mainnav a:hover,.hub-nav a:hover{background:var(--hover);color:var(--text)}
.mainnav a.on,.hub-nav a.on{color:var(--m-ink);background:var(--m-soft)}
.hub-nav{display:contents}
.hub-nav .pill{background:var(--rose);color:#fff;border-radius:999px;font-size:12px;padding:0 7px;line-height:19px;font-weight:700}
.hub-nav .pill.ok{background:var(--mint)}
.tb-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.xp-chip{display:flex;align-items:center;gap:8px;font:600 14px var(--body);color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:4px 12px 4px 4px;cursor:pointer;white-space:nowrap}
.xp-chip:hover{border-color:var(--m)}
.xp-lvl{background:var(--m);color:#fff;border-radius:999px;padding:1px 9px;font:700 13px var(--display)}
.xp-bar{width:54px;height:6px;border-radius:9px;background:var(--hover);overflow:hidden}
.xp-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--m),var(--sun));border-radius:9px}
.xp-num{font-variant-numeric:tabular-nums}
.xp-sep{width:1px;height:16px;background:var(--line)}
.lang-sel{font:500 14px var(--body);color:var(--text);padding:6px 8px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}
.icon-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:var(--panel);font:700 16px var(--display);color:var(--muted);cursor:pointer}
.icon-btn:hover{color:var(--m-ink);border-color:var(--m)}
.me{display:flex;align-items:center;gap:8px;border:0;background:none;cursor:pointer;padding:4px 8px 4px 4px;border-radius:999px;font-family:var(--body);color:var(--text);text-align:left}
.me:hover{background:var(--hover)}
.me-av{width:36px;height:36px;border-radius:50%;background:var(--m-soft);display:grid;place-items:center;font-size:20px}
.me-txt{display:flex;flex-direction:column;line-height:1.1}
.me-txt b{font-size:14px}
.me-txt small{font-size:12px;color:var(--muted)}

/* ── pages ── */
.page-in{max-width:1180px;margin:0 auto;padding-block:28px 64px;padding-inline:max(16px,env(safe-area-inset-left,0px)) max(16px,env(safe-area-inset-right,0px));display:flex;flex-direction:column;gap:28px}
.hub{padding-block:28px 64px;padding-inline:max(16px,env(safe-area-inset-left,0px)) max(16px,env(safe-area-inset-right,0px))}

/* greeting on ruled notebook paper */
.hello{background:transparent}
.hello-in{max-width:1180px;margin:0 auto;padding-block:40px 34px;padding-inline:max(16px,env(safe-area-inset-left,0px)) max(16px,env(safe-area-inset-right,0px));display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.hello-txt{display:flex;flex-direction:column;gap:6px;min-width:0}
.hello h1{font-size:clamp(34px,5vw,52px);color:var(--m-ink);font-weight:700}
.hello-stats{display:flex;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:12px 18px 12px 12px;box-shadow:var(--shadow)}
.lvl-ring{--p:0;width:66px;height:66px;border-radius:50%;display:grid;place-content:center;text-align:center;background:radial-gradient(closest-side,var(--panel) 76%,transparent 78%),conic-gradient(var(--sun) calc(var(--p)*1%),var(--hover) 0)}
.lvl-ring b{font:800 24px/1 var(--display);color:var(--m-ink)}
.lvl-ring small{font-size:11px;color:var(--muted);line-height:1}
.hs{display:flex;flex-direction:column;font-size:14px;color:var(--muted)}
.hs b{font:700 18px var(--display);color:var(--text)}

/* today row */
.today{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:16px}
.tcard{--c:var(--m);position:relative;display:flex;flex-direction:column;gap:4px;text-decoration:none;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px 16px;transition:transform .15s,box-shadow .15s;overflow:hidden}
.tcard:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.tcard b{font:700 21px/1.2 var(--display)}
.t-eyebrow{font-size:13px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}
.t-sub{color:var(--muted);font-size:15px}
.t-go{margin-top:auto;padding-top:10px;font-weight:700;color:var(--m-ink)}
.tcard.cont{background:color-mix(in srgb,var(--c) 9%,var(--panel));border-color:color-mix(in srgb,var(--c) 25%,var(--line))}
.tcard.cont .t-go{color:var(--c)}
.tcard.daily{background:#fff8dc;border-color:#f6dd8a}
.tcard.daily.done{background:var(--mint-soft);border-color:#a6e3cf}
.tcard.duel .t-go{color:var(--rose)}

/* bookshelf */
.shelf{display:flex;flex-direction:column;gap:16px}
.shelf-h{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}
.shelf-h h2{font-size:28px}
.cls-pick{color:var(--muted);font-size:15px;display:flex;align-items:center;gap:8px}
.cls-pick select{font:600 15px var(--body);color:var(--text);padding:6px 10px;border-radius:10px;border:1px solid var(--line);background:var(--panel)}
.books{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:22px 18px}
.bk{--c:var(--m);display:flex;flex-direction:column;gap:10px;text-decoration:none}
.cover{position:relative;aspect-ratio:3/3.6;max-width:100%;border-radius:6px 14px 14px 6px;background:
    linear-gradient(90deg,rgba(0,0,0,.22) 0 9px,rgba(255,255,255,.18) 9px 11px,transparent 11px),
    linear-gradient(160deg,color-mix(in srgb,var(--c) 78%,#fff),var(--c) 60%,color-mix(in srgb,var(--c) 80%,#000));
  box-shadow:0 2px 4px rgba(24,32,58,.12),0 10px 22px color-mix(in srgb,var(--c) 28%,transparent);display:flex;flex-direction:column;justify-content:space-between;padding:16px 14px 14px 24px;color:#fff;transition:transform .2s}
.cover::after{content:"";position:absolute;right:12px;top:12px;width:26px;height:26px;border-radius:50%;border:2px solid rgba(255,255,255,.45)}
.bk:hover .cover{transform:translateY(-4px) rotate(-1deg)}
.cover-icon{font-size:42px;line-height:1;filter:drop-shadow(0 2px 3px rgba(0,0,0,.2))}
.cover-sub{font:600 12px var(--body);letter-spacing:.06em;text-transform:uppercase;opacity:.92}
.cover-sub[lang="hi"]{font-size:14px}   /* Devanagari needs a little more size to read as easily */
.bk-info{display:flex;flex-direction:column;gap:4px}
.bk-info b{font:700 17px/1.25 var(--display)}
.bk-meta{font-size:14px;color:var(--muted)}
.bk-bar{height:5px;border-radius:9px;background:var(--hover);overflow:hidden}
.bk-bar i{display:block;height:100%;background:var(--sun);border-radius:9px}
/* mediums: the class + medium pickers, the "peeking at the other medium" note, "(English edition)" on an English
   book shown on the Hindi-medium shelf, and the link to a book's other-medium edition (book page) */
.shelf-picks{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px}
.peek{margin:-6px 0 0;color:var(--muted);font-size:15px}   /* plain text flow: the Hindi word sits in the sentence */
.peek .linkbtn{padding:2px 4px;font-size:15px;text-decoration:underline;text-underline-offset:3px}
.ed{font:500 14px/1.3 var(--body);color:var(--muted);white-space:nowrap}
.book-h h1 .ed{font-size:17px;vertical-align:middle}
.ed-note{margin:0;color:var(--muted);font-size:15px}
.twin{align-self:flex-start;color:var(--m-ink);font-weight:600;text-decoration:none;padding:2px 0}
.twin:hover{text-decoration:underline;text-underline-offset:3px}
.bk-info b,.ch-t b,.book-h h1,.cover-sub,.crumb{overflow-wrap:anywhere}
/* Devanagari letters join along their top line: no extra letter spacing (eyebrows and covers use some) */
[lang="hi"]{letter-spacing:normal}

/* book page */
.backlink{align-self:flex-start;text-decoration:none;font-weight:600;color:var(--muted);padding:4px 0}
.backlink:hover{color:var(--m-ink)}
.book-h{display:flex;align-items:flex-end;gap:24px;flex-wrap:wrap}
.book-h > div{display:flex;flex-direction:column;gap:6px;min-width:0}
.book-h h1{font-size:clamp(30px,4vw,44px)}
.cover.big{width:150px;flex:0 0 150px}
.chapters{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.ch{--c:var(--m);display:grid;grid-template-columns:52px minmax(0,1fr) auto;align-items:center;gap:16px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.ch:hover{border-color:color-mix(in srgb,var(--c) 40%,var(--line))}
.ch-n{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font:700 22px var(--display);color:var(--c);background:color-mix(in srgb,var(--c) 11%,var(--panel))}
.ch-t{display:flex;flex-direction:column;min-width:0}
.ch-t b{font-size:18px;font-weight:600;line-height:1.3}
.ch-t small{color:var(--muted);font-size:14px}
.ch-a{display:flex;gap:8px}
.ch-a .btn{text-decoration:none}
.extras{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;color:var(--muted);font-size:15px}
.extras a{color:var(--m-ink);font-weight:600;text-decoration:none}
.extras a:hover{text-decoration:underline}

/* reader */
.read{height:calc(100vh - var(--top) - 1px);display:flex;flex-direction:column}   /* - the top bar's 1px border */
.bar{display:flex;align-items:center;gap:8px;padding:8px max(16px,env(safe-area-inset-right,0px)) 8px max(16px,env(safe-area-inset-left,0px));border-bottom:1px solid var(--line);background:var(--panel);flex-wrap:wrap}
.crumb{display:flex;align-items:center;gap:8px;min-width:0;flex-wrap:wrap;font-size:15px}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--m-ink)}
.crumb > span{color:var(--line)}   /* the separators */
.crumb b{font-weight:600}
.bar .spacer{flex:1}
.tool{white-space:nowrap;font:600 14px var(--body);padding:6px 12px;border:1px solid var(--line);background:var(--panel);border-radius:10px;cursor:pointer;color:var(--text)}
.tool:hover{background:var(--hover)}
.tool:disabled{opacity:.4;cursor:default}
.tool.lab-btn{background:var(--m);color:#fff;border-color:var(--m)}
.tool.lab-btn:hover{background:var(--m-ink)}
.tool.lab-btn.on{background:var(--m-soft);color:var(--m-ink);border-color:color-mix(in srgb,var(--m) 30%,var(--line))}
.tool.test-btn{background:#fff8dc;border-color:#f6dd8a}
.work{flex:1;display:flex;min-height:0}
.stage{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}
.viewer{flex:1;overflow:auto;background:#5a5f6e;padding:10px;outline:0;user-select:none;-webkit-user-select:none}
.viewer .page{width:calc(var(--z,1) * 100%);margin:0 auto 10px;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.35);aspect-ratio:1/1.3;border-radius:2px}
.viewer .page canvas{display:block;width:100%;height:100%}
.viewer .msg{color:#e6e8ee;text-align:center;padding:40px}
.quiz-panel{flex:1;overflow:auto;background:var(--bg);padding:28px max(16px,env(safe-area-inset-right,0px)) 48px max(16px,env(safe-area-inset-left,0px))}

/* split view: book | Study Lab. Wide screens: the grip on the Study Lab's left edge sets its width (--lab-w on .work,
   the book keeps 280px), and .work[data-split="lab"] gives it the whole width, folding the book into a rail.
   Narrow screens (the Study Lab is an overlay, see lab.css): data-split="lab" makes the overlay cover the screen.
   .book-folded (on .read, set by the reader script) = the Study Lab is open and full width; a closed Study Lab
   leaves the book the whole width whatever data-split says. */
.book-rail,.lab-grip{display:none}
.lab-h .lab-ex{margin-left:auto;width:32px;height:32px;flex:0 0 32px;display:grid;place-items:center;border:0;border-radius:10px;background:none;font-size:19px;line-height:1;color:var(--muted);cursor:pointer}
.lab-h .lab-ex:hover{background:var(--hover);color:var(--m-ink)}
.lab-h .lab-ex + .x{margin-left:0}
.lab-drag,.lab-drag *{cursor:col-resize!important;user-select:none!important;-webkit-user-select:none!important}
.lab-drag iframe,.lab-drag canvas{pointer-events:none}
/* a wide Study Lab (dragged wide or full width) keeps a comfortable reading column; up to 888px this is just 14px */
.work .lab :is(.lab-h,.lab-tabs,.lab-body){padding-inline:max(14px,calc((100% - 1240px) / 2))}
@media (min-width:1101px){
  /* --grip: the grip's hit area. It starts on the Study Lab's border and grows only into the Study Lab, so it never
     covers the book's scrollbar; the Study Lab's content keeps clear of it. */
  .work .lab{--grip:16px;position:relative;flex:0 0 var(--lab-w,420px);width:var(--lab-w,420px);max-width:calc(100% - 280px)}
  .lab-grip{display:block;position:absolute;left:-1px;top:0;bottom:0;width:var(--grip);z-index:3;cursor:col-resize;touch-action:none}
  /* the handle: a dotted pill centred on the border (only drawn there; the hit area stays inside the Study Lab) */
  .lab-grip::before{content:"";position:absolute;left:.5px;top:50%;width:8px;height:48px;transform:translate(-50%,-50%);border-radius:9px;pointer-events:none;
    background:radial-gradient(circle,var(--panel) 1.3px,transparent 1.8px) center/100% 8px repeat-y,color-mix(in srgb,var(--m) 38%,var(--line));
    box-shadow:0 0 0 2px var(--panel);transition:background-color .15s,height .15s}
  .lab-grip:hover::before,.lab-drag .lab-grip::before{background-color:var(--m);height:68px}
  .lab-grip:focus-visible{outline:none}
  .lab-grip:focus-visible::before{background-color:var(--m);height:68px;box-shadow:0 0 0 3px var(--panel),0 0 0 6px color-mix(in srgb,var(--m) 55%,transparent)}
  .work .lab :is(.lab-h,.lab-tabs,.lab-body){padding-left:max(var(--grip),calc((100% - 1240px) / 2))}
  /* a narrow Study Lab: tab names stay on one line */
  .work .lab .lab-tabs button{white-space:nowrap;padding-inline:2px}
  .book-folded .stage{flex:0 0 44px}
  .book-folded .stage > :not(.book-rail),.book-folded .bar :is(#pageNo,#zoomOut,#zoomIn){display:none}
  .book-folded .book-rail{display:flex}
  .work[data-split="lab"] .lab{flex:1 1 auto;width:auto;max-width:none}
  .work[data-split="lab"] .lab-grip{display:none}
}
.book-rail{flex:1;flex-direction:column;align-items:center;gap:10px;padding:16px 0;border:0;background:var(--m-soft);color:var(--m-ink);font:700 16px var(--display);cursor:pointer}
.book-rail i{font-style:normal;font-size:22px;line-height:1}
.book-rail span{writing-mode:vertical-rl;letter-spacing:.08em}
.book-rail:hover{background:color-mix(in srgb,var(--m) 18%,var(--panel))}
.book-rail:focus-visible{outline-offset:-5px}
@media (min-width:1101px) and (pointer:coarse){
  .work .lab{--grip:28px}   /* fingers on tablets */
}
@media (max-width:1100px){
  .work[data-split="lab"] .lab{left:0;width:auto;border-left:0;box-shadow:none}
}
/* Tablets and small laptops: the Study Lab overlay starts under the reader's toolbar (and the find bar), so
   Prev / Next, Full screen, Test me and the Study Lab button stay reachable while it is open. --work-top is set by
   the reader script. Phones keep the overlay over the whole screen. */
@media (min-width:761px) and (max-width:1100px){
  .read .lab{top:var(--work-top,0px);padding-top:0}
}
/* Where the toolbar is tight, the Full screen button shows only its icon, and a long chapter name wraps onto a
   second line inside the breadcrumb instead of pushing the tools onto a second row. */
@media (max-width:1180px){
  .fs-btn .fs-txt{display:none}
  .reading-fs .fs-btn .fs-txt{display:inline}  /* a lone ✕ could look like "close the chapter": spell it out */
}
@media (min-width:761px){
  .bar .crumb{flex:1 1 220px;row-gap:0}   /* takes the free space itself (the tools stay on the right) */
  .bar .spacer{display:none}
}
@media (max-width:440px){
  .lab-h .lab-ex{display:none}   /* the overlay already covers the screen */
  .lab-h .lab-ex + .x{margin-left:auto}
}

/* ── onboarding / profile ── */
.onb{position:fixed;inset:0;z-index:90;display:grid;place-items:center;padding:16px;background:
    repeating-linear-gradient(180deg,transparent 0 31px,var(--rule) 31px 32px),var(--bg);overflow:auto}
.onb-card{width:min(940px,100%);display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);background:var(--panel);border-radius:24px;box-shadow:0 30px 80px rgba(24,32,58,.18);overflow:hidden}
.onb-side{background:var(--m);color:#fff;padding:28px;display:flex;flex-direction:column;gap:18px;position:relative;overflow:hidden}
.onb-side::after{content:"";position:absolute;inset:0;background:repeating-linear-gradient(180deg,transparent 0 31px,rgba(255,255,255,.08) 31px 32px);pointer-events:none}
.onb-brand{display:flex;align-items:center;gap:10px;font:700 21px var(--display)}
.onb-brand .logo-mark{background:#fff}
.onb-brand .logo-mark::before{background:var(--m);box-shadow:0 6px 0 var(--m),0 12px 0 var(--sun)}
.onb-avatar{width:96px;height:96px;border-radius:28px;background:rgba(255,255,255,.16);display:grid;place-items:center;font-size:56px;margin-top:12px}
.onb-quote{margin:0;font:600 20px/1.35 var(--display)}
.onb-steps{list-style:none;margin:auto 0 0;padding:0;display:flex;flex-direction:column;gap:8px;counter-reset:s}
.onb-steps li{counter-increment:s;display:flex;align-items:center;gap:10px;opacity:.6;font-weight:600}
.onb-steps li::before{content:counter(s);width:26px;height:26px;border-radius:50%;border:2px solid rgba(255,255,255,.6);display:grid;place-items:center;font-size:13px}
.onb-steps li.on{opacity:1}
.onb-steps li.on::before{background:var(--sun);border-color:var(--sun);color:var(--text)}
.onb-steps li.done{opacity:.9}
.onb-steps li.done::before{content:"✓";background:rgba(255,255,255,.2)}
.onb-main{padding:32px;display:flex;flex-direction:column;gap:16px;min-width:0}
.onb-body{display:flex;flex-direction:column;gap:16px;min-height:330px}
.onb-body h2{font-size:30px}
.onb-body h2:focus:not(:focus-visible){outline:none}
.onb-body .hint{margin:-6px 0 0;color:var(--muted)}
.field{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:15px;position:relative}
.field input,.field select{font:500 17px var(--body);color:var(--text);padding:11px 14px;border:1.5px solid var(--line);border-radius:12px;background:var(--panel)}
.field input:focus,.field select:focus{outline:none;border-color:var(--m);box-shadow:0 0 0 4px var(--m-soft)}
.av-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}
.av-grid button{font-size:28px;aspect-ratio:1;border-radius:14px;border:2px solid var(--line);background:var(--panel);cursor:pointer}
.av-grid button.on{border-color:var(--m);background:var(--m-soft)}
.grade-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px}
.grade-grid button{display:flex;flex-direction:column;align-items:center;padding:14px 8px;border-radius:16px;border:2px solid var(--line);background:var(--panel);cursor:pointer;color:var(--text)}
.grade-grid button small{font-size:13px;color:var(--muted)}
.grade-grid button b{font:700 32px/1 var(--display)}
.grade-grid button:hover{border-color:var(--m)}
.grade-grid button.on{background:var(--m);border-color:var(--m);color:#fff}
.grade-grid button.on small{color:rgba(255,255,255,.8)}
.combo-box{position:relative;display:flex;flex-direction:column}
.sugg{list-style:none;margin:0;padding:6px;position:absolute;top:100%;left:0;right:0;z-index:5;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);max-height:260px;overflow:auto}
.sugg li{padding:8px 10px;border-radius:8px;cursor:pointer;display:flex;flex-direction:column;font-weight:500}
.sugg li small{color:var(--muted);font-size:13px;font-weight:400}
.sugg li:hover,.sugg li.on{background:var(--m-soft)}
.lbl-note{font-weight:400;color:var(--muted)}
.here-btn{align-self:flex-start;border:0;background:none;padding:0;font:600 15px var(--body);color:var(--m-ink);cursor:pointer;text-decoration:underline;text-underline-offset:3px}
.here-note{margin-top:-10px;color:var(--muted);min-height:1em}
.school-note{font-weight:400;color:var(--muted);font-size:14px}
/* medium (class step): English / Hindi, drawn like the class buttons */
.med-field{gap:8px}
.med-hint{font-weight:400;color:var(--muted);font-size:14px}
.med-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;max-width:440px}
.med-grid button{display:flex;align-items:center;gap:12px;min-width:0;padding:10px 14px;border-radius:16px;border:2px solid var(--line);background:var(--panel);cursor:pointer;color:var(--text);text-align:left}
.med-grid button b{font:700 21px/1.2 var(--display)}
.med-ic{flex:0 0 40px;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font:700 18px/1 var(--display);background:var(--m-soft);color:var(--m-ink)}
.med-grid button:hover{border-color:var(--m)}
.med-grid button.on{background:var(--m);border-color:var(--m);color:#fff}
.med-grid button.on .med-ic{background:rgba(255,255,255,.2);color:#fff}
@media (max-width:420px){.med-grid button{flex-direction:column;gap:6px;padding:10px 8px}}   /* small phones: the sample letters above the name */
.onb-err{margin:0;color:var(--bad-ink);font-weight:600;min-height:22px}
.onb-nav{display:flex;align-items:center;gap:10px}
.onb-nav .sp{flex:1}
.btn.ghost{border-color:transparent;background:none;color:var(--muted)}

/* ── accounts (lab/account.js): Sign in / the signed-in grown-up in the top bar, the welcome card, the "which one" card ── */
.acct{position:relative;display:flex}
.acct-in{display:flex;align-items:center;gap:8px;white-space:nowrap;border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:6px 14px 6px 10px;font:600 14px var(--body);color:var(--text);cursor:pointer}
.acct-in:hover{background:var(--hover)}
.acct-in .g{width:18px;height:18px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath fill='%23EA4335' d='M24 9.5c3.5 0 6.6 1.2 9.1 3.6l6.8-6.8C35.8 2.4 30.3 0 24 0 14.6 0 6.6 5.4 2.6 13.2l7.9 6.2C12.4 13.6 17.7 9.5 24 9.5z'/%3E%3Cpath fill='%234285F4' d='M46.1 24.5c0-1.6-.1-3.1-.4-4.5H24v9h12.4c-.5 2.9-2.2 5.3-4.6 6.9l7.4 5.8c4.3-4 6.9-9.9 6.9-17.2z'/%3E%3Cpath fill='%23FBBC05' d='M10.5 28.6c-.5-1.4-.8-3-.8-4.6s.3-3.2.8-4.6l-7.9-6.2C1 16.5 0 20.1 0 24s1 7.5 2.6 10.8l7.9-6.2z'/%3E%3Cpath fill='%2334A853' d='M24 48c6.5 0 11.9-2.1 15.9-5.8l-7.4-5.8c-2.1 1.4-4.8 2.3-8.5 2.3-6.3 0-11.6-4.1-13.5-9.8l-7.9 6.2C6.6 42.6 14.6 48 24 48z'/%3E%3C/svg%3E") center/contain no-repeat}
.acct-me{width:36px;height:36px;border-radius:50%;border:2px solid var(--line);background:var(--m-soft);padding:0;overflow:hidden;cursor:pointer;font:700 15px var(--display);color:var(--m-ink);display:grid;place-items:center}
.acct-me img{width:100%;height:100%;object-fit:cover}
.acct-menu{position:absolute;right:0;top:calc(100% + 8px);z-index:40;width:max-content;max-width:min(300px,calc(100vw - 32px));background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:6px;display:flex;flex-direction:column}
.acct-menu p{margin:0;padding:8px 10px 10px;border-bottom:1px solid var(--line);margin-bottom:4px;font-size:14px;overflow-wrap:anywhere}
.acct-menu p small{display:block;color:var(--muted);font-size:12px}
.acct-menu button{border:0;background:none;text-align:left;padding:8px 10px;border-radius:8px;font:500 14px var(--body);color:var(--text);cursor:pointer}
.acct-menu button:hover{background:var(--hover)}
.acct-menu button.bad{color:var(--bad-ink)}
.acct-welcome{justify-content:center;align-items:flex-start;gap:18px}
.acct-welcome .hint{margin:0;color:var(--muted);font-size:17px;max-width:46ch}
.acct-gbtn{min-height:44px}
.acct-welcome .acct-school{font-size:15px;margin-top:6px}
.acct-gbtn.busy{opacity:.5;pointer-events:none}
.acct-test{display:flex;gap:8px;flex-wrap:wrap}
.acct-test input{font:inherit;padding:7px 12px;border:1px solid var(--line);border-radius:12px;min-width:0}
.acct-card{grid-template-columns:1fr;width:min(560px,100%)}
.acct-card .hint{color:var(--muted);margin:0}
.acct-choices{display:flex;flex-direction:column;gap:10px}
.acct-choices .btn{text-align:left;padding:12px 16px}
.acct-choices small{display:block;font-weight:400;opacity:.85}
.acct-card.wide{width:min(760px,100%)}
.acct-card .hint.small{font-size:14px}
.acct-roles{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.acct-role,.acct-kid{display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;border:2px solid var(--line);background:var(--panel);border-radius:16px;padding:14px;cursor:pointer;font:inherit;color:var(--text)}
.acct-role:hover,.acct-kid:hover{border-color:var(--m);background:var(--hover)}
.acct-role.on,.acct-kid.on{border-color:var(--m);background:var(--m-soft)}
.acct-role .e{font-size:30px;line-height:1.2}
.acct-role b,.acct-kid b{font:700 17px var(--display)}
.acct-role small,.acct-kid small{color:var(--muted);font-size:13px;line-height:1.3}
.acct-kids{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px;max-height:min(52vh,460px);overflow:auto;padding:2px}
.acct-kid .av{width:44px;height:44px;border-radius:14px;background:var(--m-soft);display:grid;place-items:center;font-size:26px;margin-bottom:4px}
.acct-kid.add{border-style:dashed}
.acct-kid.add .av{background:none;border:2px dashed var(--line);color:var(--muted);font-size:22px}
.acct-kid.here{border-color:var(--sun,#f5b400)}
.acct-find{font:inherit;padding:9px 14px;border:1px solid var(--line);border-radius:12px;width:100%}
.acct-chip{display:inline-block;margin-left:4px;padding:1px 8px;border-radius:999px;background:var(--m-soft);color:var(--m-ink);font-size:12px;font-weight:600;white-space:nowrap}
.acct-people{list-style:none;margin:0 0 12px;padding:0;display:flex;flex-direction:column;gap:8px}
.acct-people li{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.acct-people small{display:block;color:var(--muted)}
.acct-share{display:flex;gap:8px;flex-wrap:wrap}
.acct-share input{flex:1;min-width:0;font:inherit;padding:8px 12px;border:1px solid var(--line);border-radius:12px}
.acct-found p{margin:12px 0 8px}
.acct-admin .panel{display:flex;flex-direction:column;gap:12px}
.acct-q-tabs{align-self:flex-start}
.acct-q-tabs button{white-space:nowrap;padding:6px 14px}
.acct-q-list{display:flex;flex-direction:column;gap:12px}
.acct-q{border:1px solid var(--line);border-radius:14px;padding:14px 16px;display:flex;flex-direction:column;gap:8px;background:var(--panel)}
.acct-q.done{opacity:.7}
.acct-q header{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px}
.acct-q header b{font:700 18px var(--display)}
.acct-q header small{margin-left:auto}
.acct-q dl{display:grid;grid-template-columns:max-content minmax(0,1fr);gap:2px 12px;margin:0;font-size:14px}
.acct-q dt{color:var(--muted)}
.acct-q dd{margin:0;overflow-wrap:anywhere}
.acct-q-msg{margin:0;white-space:pre-wrap}
.acct-q-act{display:flex;flex-wrap:wrap;gap:8px}
.acct-float{position:fixed;top:12px;right:max(16px,env(safe-area-inset-right,0px));z-index:95}
.acct-float .acct-me{box-shadow:var(--shadow);border-color:var(--panel)}
/* school admins (index.html adds .school-view): only their school's page, no study features in the top bar */
.school-view .mainnav a:not([data-nav="admin"]),.school-view #hubNav,.school-view .xp,.school-view #langSel,.school-view [data-tour],.school-view #meBtn{display:none!important}
.acct-classes{display:flex;flex-wrap:wrap;gap:8px}
.acct-classes .chip small{opacity:.7}
.acct-class-h{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.acct-class-h .sp{flex:1}
.acct-table-wrap{overflow-x:auto}
.acct-table{width:100%;border-collapse:collapse;font-size:15px}
.acct-table th,.acct-table td{padding:9px 10px;text-align:left;border-top:1px solid var(--line);vertical-align:middle}
.acct-table thead th{border-top:0;font-size:13px;color:var(--muted);font-weight:600}
.acct-row-act{white-space:nowrap;text-align:right}
.acct-row-act .btn{margin-left:4px}
.acct-form{display:flex;flex-direction:column;gap:12px}
.acct-form fieldset{border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin:0;display:flex;flex-direction:column;gap:8px}
.acct-form legend{font-weight:700;padding:0 6px}
.acct-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.acct-grid .wide{grid-column:1/-1}
.acct-form label{display:flex;flex-direction:column;gap:5px;font-weight:600;font-size:14px}
.acct-form label small{font-weight:400;color:var(--muted)}
.acct-form input,.acct-form select{font:inherit;font-weight:400;padding:8px 11px;border:1px solid var(--line);border-radius:10px;background:var(--panel);color:var(--text);min-width:0}
.acct-school h4{margin:14px 0 4px;font:700 16px var(--display)}
.acct-bar{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);z-index:80;display:flex;align-items:center;gap:12px;background:var(--text);color:#fff;padding:10px 12px 10px 18px;border-radius:14px;box-shadow:0 8px 24px rgba(0,0,0,.2);max-width:calc(100vw - 32px)}
@media (max-width:760px){ .acct-in{padding:6px} .acct-in .t{display:none} }

/* ── responsive ── */
@media (max-width:1100px){
  .me-txt{display:none}
}
@media (max-width:900px){
  .today{grid-template-columns:1fr}
  .onb-card{grid-template-columns:1fr}
  .onb-side{padding:20px 24px;flex-direction:row;align-items:center;flex-wrap:wrap}
  .onb-avatar{width:56px;height:56px;font-size:32px;margin:0;border-radius:16px}
  .onb-quote,.onb-steps{display:none}
}
/* Tablets (761–1000px): the top bar's three groups don't fit side by side, so it slims down a little like on
   phones (logo without its name, XP chip without its bar, a narrower language picker, tighter gaps). */
@media (min-width:761px) and (max-width:1000px){
  .topbar-in{gap:12px}
  .brand > span:last-child,.xp-bar,.xp-sep{display:none}
  .mainnav{min-width:0;overflow-x:auto;scrollbar-width:none}
  .mainnav a{padding:7px 9px}
  .tb-right{gap:8px;flex-shrink:0}
  .lang-sel{max-width:118px;font-size:13px}
}
@media (max-width:760px){
  :root{--top:auto}
  .topbar-in{height:auto;flex-wrap:wrap;gap:8px 12px;padding-block:8px}
  .mainnav{order:3;width:100%;overflow-x:auto}
  .xp-bar,.xp-sep,.xp-num,.xp-chip span[title]{display:none}
  .xp-chip{padding:4px}
  .brand > span:last-child{display:none}
  .tb-right{gap:6px}
  .lang-sel{max-width:118px;font-size:13px}
  .read{height:auto;min-height:calc(100vh - 110px)}
  .viewer{min-height:70vh}
  .ch{grid-template-columns:44px minmax(0,1fr)}
  .ch-n{width:44px;height:44px;font-size:19px}
  .ch-a{grid-column:2}
  .onb-main{padding:22px}
  .av-grid{grid-template-columns:repeat(4,1fr)}
  .grade-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .books{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 14px}
}

/* ── family / guardians ── */
.who{display:flex;gap:10px;flex-wrap:wrap}
.who-btn{display:flex;align-items:center;gap:8px;font:600 16px var(--body);padding:10px 16px;border-radius:14px;border:2px solid var(--line);background:var(--panel);color:var(--text);cursor:pointer}
.who-btn span{font-size:22px}
.who-btn:hover{border-color:var(--m)}
.who-btn.on{border-color:var(--m);background:var(--m-soft);color:var(--m-ink)}
.who-btn.on::after{content:"✓";font-weight:800}
.adults{display:flex;flex-direction:column;gap:14px}
.adults .none{margin:0}
.adult{border:1px solid var(--line);border-radius:16px;padding:14px 16px;display:flex;flex-direction:column;gap:12px;background:var(--bg)}
.adult h3{font-size:19px}
.vfield{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:15px}
.vrow,.vcode{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
/* the box keeps room for a whole number or address; the button wraps below it on narrow screens */
.vrow .v-in{flex:1 1 9em;min-width:9em}
.vrow .v-in[type=email]{flex-basis:12em;min-width:12em}
.vfield input{font:500 17px var(--body);color:var(--text);padding:10px 12px;border:1.5px solid var(--line);border-radius:12px;background:var(--panel)}
.vfield input:focus{outline:none;border-color:var(--m);box-shadow:0 0 0 4px var(--m-soft)}
.vfield .cc{font-weight:700;color:var(--muted);padding:10px 4px 10px 0}
.v-code{width:150px;letter-spacing:4px;text-align:center}
.v-code::placeholder{letter-spacing:normal}
.v-ok{color:var(--ok-ink);font-weight:700;white-space:nowrap}
.vfield.verified .v-in{border-color:color-mix(in srgb,var(--mint) 60%,var(--line));background:var(--mint-soft)}
.v-msg{font-weight:400;color:var(--muted);font-size:14px;min-height:1em}
.v-msg.bad{color:var(--bad-ink);font-weight:600}
/* progress updates by email: how often (+ the weekday for Weekly), greyed out until the email is checked */
.ufield{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:15px}
.urow{display:flex;gap:8px 10px;align-items:center;flex-wrap:wrap}
.u-day{display:inline-flex;align-items:center;gap:8px;font-weight:500;color:var(--muted)}
.ufield select{font:500 17px var(--body);color:var(--text);padding:10px 12px;border:1.5px solid var(--line);border-radius:12px;background:var(--panel);max-width:100%;min-width:0}
.ufield select:focus{outline:none;border-color:var(--m);box-shadow:0 0 0 4px var(--m-soft)}
.ufield select:disabled{color:var(--muted);background:var(--hover);cursor:not-allowed}
.ufield .u-msg{font-weight:400;color:var(--muted);font-size:14px}
.fam-note{margin:0;padding:10px 14px;border-radius:12px;background:#fff8dc;border:1px solid #f6dd8a;font-size:15px}
.fam-note:empty{padding:0;border:0;margin-top:-16px}   /* stays in the page so screen readers hear it appear */
.linkbtn{border:0;background:none;color:var(--m-ink);font:600 14px var(--body);cursor:pointer;padding:6px}
.linkbtn:disabled{color:var(--muted);cursor:default}
.nudge{display:flex;align-items:center;gap:14px;background:#fff8dc;border:1px solid #f6dd8a;border-radius:var(--radius);padding:14px 18px;flex-wrap:wrap}
.nudge-ic{font-size:30px}
.nudge > div{flex:1;min-width:200px;display:flex;flex-direction:column}
.nudge span{color:var(--muted);font-size:15px}
.family h3 .mini-btn{margin-left:auto}
.contacts{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.contact{border:1px solid var(--line);border-radius:14px;padding:12px 14px;display:flex;flex-direction:column;gap:6px}
.c-who small{display:block;color:var(--muted);font-size:13px}
.c-line{display:flex;justify-content:space-between;gap:8px;font-size:14px;flex-wrap:wrap}
.c-line span:first-child{min-width:0;overflow-wrap:anywhere}
.st.good{color:var(--ok-ink)} .st.warning{color:#b26a00}
.add-more{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.add-more .btn{font-size:14px;padding:7px 14px;border-style:dashed}
.pageno{display:flex;align-items:center;gap:6px;font:600 14px var(--body);color:var(--muted);white-space:nowrap}
.pageno input{width:3.4em;font:600 14px var(--body);color:var(--text);text-align:center;padding:5px 4px;border:1px solid var(--line);border-radius:8px;background:var(--panel);-moz-appearance:textfield}
.pageno input::-webkit-inner-spin-button,.pageno input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
.pageno span{font-variant-numeric:tabular-nums}

/* ── full screen reading (the reader's ⛶ button puts the whole page in full screen) ── */
html.reading-fs{--top:0px}
.reading-fs .topbar{display:none}
.reading-fs .read{height:100vh;min-height:0}

/* the small print under the home page and the sign-in card: Privacy, Terms, FAQ */
.sitefoot{display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:center;margin:28px 0 8px;font-size:14px;color:var(--muted)}
.sitefoot a{color:var(--muted)}
.sitefoot a:hover{color:var(--text)}
.acct-welcome .acct-legal{font-size:13px;margin-top:2px}