/* PYQ Pro v2 — "Sunset Glass" theme. Dark default, light variant via [data-theme="light"]. */
:root{
  --bg:#05030C; --bg2:#140B24;
  --glow1:rgba(142,45,226,.45); --glow2:rgba(255,94,98,.32); --glow3:rgba(255,200,55,.12);
  --glass:rgba(255,255,255,.07); --glass-2:rgba(255,255,255,.12); --border:rgba(255,255,255,.14);
  --edge:inset 0 1px 0 rgba(255,255,255,.22),inset 0 0 0 1px rgba(255,255,255,.04),inset 0 -1px 0 rgba(255,255,255,.05);
  --sheen:linear-gradient(160deg,rgba(255,255,255,.13),rgba(255,255,255,.03) 38%,rgba(255,255,255,0) 60%,rgba(255,255,255,.05));
  --text:#FFFFFF; --muted:rgba(255,255,255,.74); --faint:rgba(255,255,255,.5);
  --g1:#FF5E62; --g2:#8E2DE2; --grad:linear-gradient(135deg,var(--g1),var(--g2));
  /* text-bearing button gradient: deepened for WCAG AA with white text */
  --btn-top:#E24758; --btn-bot:#7E24CF; --btn-lip:#4A1180;
  --accent:#FFC837; --ok:#3DDC97; --bad:#FF4D6D; --ok-ink:#06291A; --bad-ink:#2B0510;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:22px; --fs:16px;
  --hfont:'Baloo 2','Noto Sans Devanagari',system-ui,sans-serif;
  --bfont:'Mukta','Noto Sans Devanagari',system-ui,sans-serif;
  --blur:blur(18px) saturate(170%);
  color-scheme:dark;
}
[data-theme="light"]{
  --bg:#FBF6FF; --bg2:#F6EBFF;
  --glow1:rgba(142,45,226,.22); --glow2:rgba(255,94,98,.22); --glow3:rgba(255,200,55,.25);
  --glass:rgba(255,255,255,.45); --glass-2:rgba(255,255,255,.7); --border:rgba(255,255,255,.7);
  --edge:inset 0 1px 0 rgba(255,255,255,.95),inset 0 0 0 1px rgba(120,60,170,.08);
  --sheen:linear-gradient(160deg,rgba(255,255,255,.6),rgba(255,255,255,.12) 45%,rgba(255,255,255,.25));
  --text:#22102F; --muted:rgba(34,16,47,.76); --faint:rgba(34,16,47,.56);
  --accent:#B87900; --ok:#0F9D63; --bad:#D7193F; --ok-ink:#fff; --bad-ink:#fff;
  --shadow:0 10px 28px rgba(80,30,120,.14);
  color-scheme:light;
}
html[data-font="s"]{--fs:14.5px} html[data-font="l"]{--fs:18px}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%}
body{font-family:var(--bfont);font-size:var(--fs);color:var(--text);background:var(--bg);line-height:1.5;overscroll-behavior-y:none;
  min-height:100dvh}
h1,h2,h3,.num,.hf{font-family:var(--hfont);line-height:1.2;margin:0}
h1{font-size:1.6em;font-weight:800} h2{font-size:1.25em;font-weight:700} h3{font-size:1.05em;font-weight:700}
p{margin:.3em 0}
a{color:inherit}
button{font:inherit;color:inherit}
.ic{flex:none;vertical-align:middle}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- shell ---------- */
#app{max-width:560px;margin:0 auto;min-height:100dvh;padding:calc(env(safe-area-inset-top) + 8px) 14px calc(96px + env(safe-area-inset-bottom))}
.topbar{display:flex;align-items:center;gap:10px;padding:6px 2px 12px}
.topbar .title{flex:1;min-width:0}
.topbar .title h1{font-size:1.35em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar .sub{color:var(--muted);font-size:.85em}
.iconbtn{width:44px;height:44px;border-radius:14px;border:1px solid var(--border);background:var(--glass);backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur);display:grid;place-items:center;cursor:pointer;flex:none;transition:transform .12s}
.iconbtn:active{transform:scale(.92)}

/* ---------- glass cards & bento ---------- */
.card{background:var(--sheen),var(--glass);border:1px solid var(--border);border-radius:var(--radius);padding:16px;backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur);box-shadow:var(--edge),var(--shadow);position:relative;overflow:hidden}
.card.tap{cursor:pointer;transition:transform .15s}
.card.tap:active{transform:scale(.97)}
.bento{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.bento .span2{grid-column:span 2}
.stack{display:flex;flex-direction:column;gap:12px}
.row{display:flex;align-items:center;gap:10px}
.row.wrap{flex-wrap:wrap}
.between{justify-content:space-between}
.grow{flex:1;min-width:0}
.muted{color:var(--muted)} .faint{color:var(--faint)} .small{font-size:.85em} .tiny{font-size:.75em}
.center{text-align:center}
.mt{margin-top:12px} .mb{margin-bottom:12px}
.label{font-size:.78em;color:var(--muted);font-weight:500;letter-spacing:.2px}
.big{font-family:var(--hfont);font-size:2em;font-weight:800;line-height:1}
.hero{background:var(--grad);border:none;color:#fff;min-height:150px}
.hero::after{content:"";position:absolute;right:-40px;top:-40px;width:160px;height:160px;border-radius:50%;background:rgba(255,255,255,.14)}
.hero .muted{color:rgba(255,255,255,.88)}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border-radius:999px;border:1px solid var(--border);background:var(--glass);font-size:.85em;cursor:pointer;white-space:nowrap;text-decoration:none}
.chip.on{background:var(--grad);color:#fff;border-color:transparent}
.chips{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.tag{display:inline-block;font-size:.72em;padding:2px 8px;border-radius:8px;background:var(--glass-2);border:1px solid var(--border);font-weight:500}
.tag.sample{background:rgba(255,200,55,.18);border-color:rgba(255,200,55,.5)}
.sec-title{display:flex;align-items:center;justify-content:space-between;margin:18px 2px 10px}
.list{display:flex;flex-direction:column;gap:10px}
.item{display:flex;align-items:center;gap:12px;padding:14px;border-radius:18px;background:var(--sheen),var(--glass);box-shadow:var(--edge);border:1px solid var(--border);cursor:pointer;text-decoration:none;transition:transform .15s;backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur)}
.item:active{transform:scale(.98)}
.item .em{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;font-size:1.35em;background:var(--glass-2);flex:none}
.folder .em{background:linear-gradient(135deg,rgba(255,200,55,.35),rgba(255,94,98,.3))}
.empty{padding:28px 16px;text-align:center;color:var(--muted)}
.empty .em{font-size:2.4em}
.bar{height:8px;border-radius:99px;background:var(--glass-2);overflow:hidden}
.bar>i{display:block;height:100%;border-radius:inherit;background:var(--grad);width:0;transition:width 1s cubic-bezier(.2,.8,.2,1)}
.hero .bar{background:rgba(255,255,255,.25)} .hero .bar>i{background:#fff}

/* ---------- 3D buttons ---------- */
.btn{--top:var(--btn-top);--bot:var(--btn-bot);--lip:var(--btn-lip);--ink:#fff;
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:12px 20px;border:0;border-radius:16px;cursor:pointer;
  font-family:var(--hfont);font-weight:700;font-size:1.05em;color:var(--ink);text-decoration:none;user-select:none;
  background:linear-gradient(180deg,rgba(255,255,255,.22),rgba(255,255,255,0) 48%),linear-gradient(135deg,var(--top),var(--bot));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.45),inset 0 -2px 0 rgba(0,0,0,.18),0 5px 0 var(--lip),0 10px 20px rgba(0,0,0,.28);
  transform:translateY(0);transition:transform .08s ease,box-shadow .08s ease,filter .2s}
.btn:active,.btn.pressed{transform:translateY(4px);box-shadow:inset 0 1px 0 rgba(255,255,255,.35),inset 0 -1px 0 rgba(0,0,0,.18),0 1px 0 var(--lip),0 3px 8px rgba(0,0,0,.25)}
.btn:disabled{filter:grayscale(.7) brightness(.8);cursor:not-allowed}
.btn.block{display:flex;width:100%}
.btn.sm{min-height:40px;padding:8px 14px;font-size:.92em;border-radius:13px;box-shadow:inset 0 1px 0 rgba(255,255,255,.45),0 4px 0 var(--lip),0 7px 14px rgba(0,0,0,.25)}
.btn.sm:active{transform:translateY(3px);box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 1px 0 var(--lip)}
.btn.gold{--top:#FFD966;--bot:#FFB224;--lip:#B3700A;--ink:#2B1700}
.btn.green{--top:#5BE8AA;--bot:#21B979;--lip:#0E7048;--ink:#04261A}
.btn.red{--top:#FF6E86;--bot:#E02950;--lip:#8A0F2B;--ink:#fff}
.btn.ghost{--top:rgba(255,255,255,.16);--bot:rgba(255,255,255,.06);--lip:rgba(0,0,0,.35);--ink:var(--text);border:1px solid var(--border)}
[data-theme="light"] .btn.ghost{--top:#ffffff;--bot:#F1E6FA;--lip:#CDB7E2;--ink:#22102F}
.btn.white{--top:#fff;--bot:#F3E9FF;--lip:#B9A1D6;--ink:#4A1180}
.btns{display:flex;gap:10px;flex-wrap:wrap}
.btns>.btn{flex:1}

/* ---------- rings, flame ---------- */
.ring{position:relative;width:96px;height:96px;flex:none}
.ring svg{transform:rotate(-90deg)}
.ring .trk{stroke:var(--glass-2)}
.ring .val{stroke:url(#ringGrad);stroke-linecap:round;transition:stroke-dashoffset 1.2s cubic-bezier(.2,.8,.2,1)}
.ring .lbl{position:absolute;inset:0;display:grid;place-items:center;text-align:center;font-family:var(--hfont);font-weight:800;font-size:1.35em}
.flame{display:inline-block;font-size:1.9em;transform-origin:50% 90%;animation:flick 1.6s ease-in-out infinite}
@keyframes flick{0%,100%{transform:scale(1) rotate(-2deg)}50%{transform:scale(1.12) rotate(3deg)}}
.flame.off{filter:grayscale(1);opacity:.5;animation:none}

/* ---------- slider ---------- */
.slider{position:relative;overflow:hidden;border-radius:var(--radius)}
.slides{display:flex;transition:transform .6s cubic-bezier(.65,0,.35,1)}
.slide{flex:0 0 100%;padding:16px 16px 30px;min-height:136px}
.dots{position:absolute;bottom:10px;left:0;right:0;display:flex;justify-content:center;gap:6px}
.dots i{width:7px;height:7px;border-radius:9px;background:var(--faint);transition:width .3s,background .3s}
.dots i.on{width:20px;background:var(--accent)}

/* ---------- quiz ---------- */
.qhead{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.timer{font-family:var(--hfont);font-weight:800;padding:6px 12px;border-radius:12px;background:var(--glass-2);border:1px solid var(--border);min-width:84px;text-align:center}
.timer.warn{background:var(--bad);color:var(--bad-ink);animation:pulse 1s infinite}
@keyframes pulse{50%{transform:scale(1.06)}}
.qtext{font-size:1.12em;font-weight:500;line-height:1.6;margin:6px 0 14px;white-space:pre-line}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:13px 14px;border-radius:16px;border:1px solid var(--border);background:var(--glass);cursor:pointer;font-size:1em;
  box-shadow:0 4px 0 rgba(0,0,0,.22);transition:transform .08s,box-shadow .08s,background .25s;backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur)}
.opt:active{transform:translateY(3px);box-shadow:0 1px 0 rgba(0,0,0,.22)}
.opt .k{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;font-family:var(--hfont);font-weight:800;background:var(--glass-2);flex:none}
.opt .mk{margin-left:auto;font-weight:800;font-size:1.2em}
.opt.sel{border-color:var(--accent);background:rgba(255,200,55,.16)}
.opt.sel .k{background:var(--accent);color:#2B1700}
.opt.ok{background:var(--ok);color:var(--ok-ink);border-color:transparent}
.opt.ok .k{background:rgba(255,255,255,.35);color:inherit}
.opt.bad{background:var(--bad);color:var(--bad-ink);border-color:transparent}
.opt.bad .k{background:rgba(255,255,255,.3);color:inherit}
.opt:disabled{cursor:default}
.shake{animation:shake .45s}
@keyframes shake{20%,60%{transform:translateX(-7px)}40%,80%{transform:translateX(7px)}}
.pop{animation:popIn .35s cubic-bezier(.2,1.4,.4,1)}
@keyframes popIn{from{transform:scale(.85);opacity:0}}
.explain{margin-top:12px;border-left:4px solid var(--accent)}
.palette{display:grid;grid-template-columns:repeat(8,1fr);gap:6px}
.palette button{aspect-ratio:1;border-radius:10px;border:1px solid var(--border);background:var(--glass);font-family:var(--hfont);font-weight:700;font-size:.85em;cursor:pointer}
.palette .ans{background:var(--ok);color:var(--ok-ink)} .palette .rev{background:var(--accent);color:#2B1700} .palette .cur{outline:2px solid var(--text)}
.qtools{display:flex;gap:8px;margin-top:14px}
.qtools .iconbtn{width:40px;height:40px}
.iconbtn.on{color:var(--accent);border-color:var(--accent)}
table.tbl{width:100%;border-collapse:collapse;font-size:.9em}
.tbl th,.tbl td{padding:8px 6px;text-align:center;border-bottom:1px solid var(--border)}
.tbl th:first-child,.tbl td:first-child{text-align:left}
.okc{color:var(--ok);font-weight:700} .badc{color:var(--bad);font-weight:700}

/* ---------- forms ---------- */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.field label{font-size:.85em;color:var(--muted)}
input,select,textarea{font:inherit;color:var(--text);background:var(--glass-2);border:1px solid var(--border);border-radius:12px;padding:11px 12px;width:100%}
input:focus,select:focus,textarea:focus,.opt:focus-visible,.btn:focus-visible,.item:focus-visible,.chip:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
select option{color:#111}
.setrow{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}
.setrow:last-child{border-bottom:0}

/* ---------- timetable ---------- */
.slot{display:flex;align-items:center;gap:12px}
.tick{width:40px;height:40px;border-radius:12px;border:2px solid var(--border);display:grid;place-items:center;cursor:pointer;background:var(--glass);flex:none;transition:background .2s,transform .15s}
.tick.on{background:var(--ok);color:var(--ok-ink);border-color:transparent;transform:scale(1.05)}
.weekbars{display:flex;gap:8px;align-items:flex-end;height:120px}
.weekbars .b{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;height:100%;justify-content:flex-end}
.weekbars .b i{width:100%;border-radius:8px 8px 4px 4px;background:var(--grad);min-height:3px;transition:height 1s}
.notice{font-size:.85em;padding:10px 12px;border-radius:12px;background:rgba(255,200,55,.14);border:1px solid rgba(255,200,55,.45)}

/* ---------- heatmap, charts ---------- */
.heat{display:grid;grid-template-columns:repeat(auto-fill,minmax(98px,1fr));gap:6px}
.heat>*{padding:8px;border-radius:10px;font-size:.75em;line-height:1.25;min-height:54px;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.4)}
.chart{width:100%;height:auto;display:block}
.chart text{fill:var(--muted);font-size:10px;font-family:var(--bfont)}
.badges{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.badge{text-align:center;padding:12px 6px;border-radius:16px;background:var(--glass);border:1px solid var(--border);font-size:.78em}
.badge .em{font-size:2em;display:block}
.badge.lock{opacity:.4;filter:grayscale(1)}

/* ---------- flashcards ---------- */
.fc-wrap{position:relative;height:360px;perspective:1000px}
.fc{position:absolute;inset:0;touch-action:none;cursor:grab}
.fc-in{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.fc.flip .fc-in{transform:rotateY(180deg)}
.fc-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;justify-content:center;padding:22px;overflow:auto}
.fc-back{transform:rotateY(180deg)}

/* ---------- overlays ---------- */
.toasts{position:fixed;top:calc(12px + env(safe-area-inset-top));left:0;right:0;display:flex;flex-direction:column;align-items:center;gap:8px;z-index:90;pointer-events:none}
.toast{pointer-events:auto;max-width:92%;display:flex;align-items:center;gap:10px;padding:11px 16px;border-radius:16px;background:rgba(30,16,52,.94);color:#fff;border:1px solid rgba(255,255,255,.16);box-shadow:var(--shadow);animation:toastIn .4s cubic-bezier(.2,1.3,.4,1);font-weight:500}
.toast.ok{background:#0E6E46} .toast.bad{background:#9B1534} .toast.gold{background:#7A4D00}
.toast.out{animation:toastOut .3s forwards}
@keyframes toastIn{from{transform:translateY(-30px) scale(.9);opacity:0}}
@keyframes toastOut{to{transform:translateY(-20px);opacity:0}}
.modal-bg{position:fixed;inset:0;background:rgba(8,3,16,.6);display:flex;align-items:flex-end;justify-content:center;z-index:80;animation:fadeIn .25s;padding:12px}
.modal{width:min(520px,100%);max-height:88dvh;overflow:auto;border-radius:26px;padding:20px;background:var(--bg2);border:1px solid var(--border);box-shadow:0 20px 60px rgba(0,0,0,.5);animation:sheetIn .4s cubic-bezier(.2,1.1,.3,1);margin-bottom:env(safe-area-inset-bottom)}
.modal .big-em{font-size:3.2em;text-align:center;display:block}
@keyframes fadeIn{from{opacity:0}}
@keyframes sheetIn{from{transform:translateY(60px) scale(.96);opacity:0}}
#confetti{position:fixed;inset:0;pointer-events:none;z-index:95}

/* ---------- motion ---------- */
.view{animation:viewIn .42s cubic-bezier(.2,.8,.2,1)}
@keyframes viewIn{from{opacity:0;transform:translateY(18px)}}
.view.back{animation:viewBack .38s cubic-bezier(.2,.8,.2,1)}
@keyframes viewBack{from{opacity:0;transform:translateX(-18px)}}
.stg>*{animation:stgIn .5s cubic-bezier(.2,.8,.2,1) both;animation-delay:calc(var(--i,0) * 55ms)}
@keyframes stgIn{from{opacity:0;transform:translateY(16px) scale(.97)}}
html.reduce *,html.reduce *::before,html.reduce *::after{animation-duration:.001ms!important;animation-delay:0s!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;animation-delay:0s!important;transition-duration:.001ms!important}}

/* ---------- print preview (A4) ---------- */
.paper-wrap{overflow:auto;border-radius:14px;background:#888;padding:10px}
.paper{background:#fff;color:#111;width:100%;max-width:794px;margin:0 auto;padding:28px 26px;font-family:'Mukta','Noto Sans Devanagari',sans-serif;font-size:13px;line-height:1.55;box-shadow:0 6px 18px rgba(0,0,0,.3)}
.paper h1{font-family:'Baloo 2',sans-serif;font-size:20px;color:#5B1A9A;margin:0}
.paper .ph{border-bottom:3px solid #8E2DE2;padding-bottom:8px;margin-bottom:12px;display:flex;justify-content:space-between;gap:10px;align-items:flex-end}
.paper .pmeta{font-size:11.5px;color:#444;text-align:right}
.paper .pq{break-inside:avoid;margin:0 0 10px}
.paper .pq b{color:#5B1A9A}
.paper .popts{display:grid;grid-template-columns:1fr 1fr;gap:2px 16px;padding-left:18px}
.paper h2{font-size:15px;color:#C2185B;margin:14px 0 6px;font-family:'Baloo 2',sans-serif;break-after:avoid}
.paper .cat{display:inline-block;font-size:10.5px;padding:1px 7px;border-radius:6px;background:#F3E5FF;color:#5B1A9A;margin-right:6px}
.paper .pfoot{margin-top:16px;border-top:1px solid #ccc;padding-top:6px;font-size:10.5px;color:#666}
.paper .keygrid{display:grid;grid-template-columns:repeat(5,1fr);gap:4px;font-size:12px}