/* Pariko look: deep indigo ink, violet brand, saffron spark, bright green
   for right and coral for wrong. --gold is the brand accent (the name is
   older than the colour). */
:root{
  --ink:#16123A;
  --ink-soft:#5E5A78;
  --paper:#F5F4FA;
  --card:#FFFFFF;
  --rule:#E7E5F0;
  --pen:#E5484D;
  --pen-wash:#FDECEC;
  --ok:#0E9F6E;
  --ok-wash:#E6F7EF;
  --gold:#5B3DF5;
  --gold-wash:#EFEBFF;
  --saffron:#FF8A1F;
  --grad:linear-gradient(135deg,#2A1B7A 0%,#5B3DF5 58%,#8B5CF6 100%);
  --sans:"Plus Jakarta Sans","Noto Sans Telugu",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --serif:"Plus Jakarta Sans","Noto Sans Telugu",-apple-system,"Segoe UI",Roboto,sans-serif;
  --shadow:0 1px 2px rgba(22,18,58,.04),0 6px 20px rgba(22,18,58,.06);
  --soft:#F1EFF7;          /* quiet fills: chips, tracks */
  --tint-saffron:#FFF1E4;
  --glass:rgba(255,255,255,.82);
  --wash:#EFEBFF;          /* the top glow; each tab sets its own */
}
/* dark: for night study. Same roles, deeper surfaces. */
:root[data-theme="dark"]{
  --ink:#F1EFFF;
  --ink-soft:#A9A5C6;
  --paper:#0E0C1D;
  --card:#1A172E;
  --rule:#2B2745;
  --pen:#FF6B70;
  --pen-wash:#3A1B24;
  --ok:#2FD08F;
  --ok-wash:#11302A;
  --gold:#9C87FF;
  --gold-wash:#252046;
  --soft:#24203B;
  --tint-saffron:#3A2716;
  --glass:rgba(26,23,46,.86);
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.35);
  color-scheme:dark;
}
:lang(te) body{line-height:1.6}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:var(--paper);color:var(--ink);
  font-family:var(--sans);
  font-size:16px;line-height:1.45;min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
.serif{font-family:var(--serif)}

/* ---- study header: light, with a soft glow in the tab's colour ---- */
[data-mode="today"]{--wash:#FFE7CC}
[data-mode="quiz"]{--wash:#E6DEFF}
[data-mode="cards"]{--wash:#D9E9FF}
[data-mode="mocks"]{--wash:#D4F3E4}
[data-mode="plan"]{--wash:#FFE0EC}
:root[data-theme="dark"] [data-mode]{--wash:#221C45}
:root[data-theme="dark"] [data-mode="today"]{--wash:#3A2614}
:root[data-theme="dark"] [data-mode="cards"]{--wash:#132A45}
:root[data-theme="dark"] [data-mode="mocks"]{--wash:#0F3326}
:root[data-theme="dark"] [data-mode="plan"]{--wash:#3A1628}
[data-mode]{background:linear-gradient(180deg,var(--wash) 0,var(--paper) 230px) no-repeat;min-height:100vh;transition:background .3s}
.st-head{color:var(--ink);padding:14px 16px 10px;position:sticky;top:0;z-index:20;
  background:var(--wash)}
.st-top{display:flex;align-items:center;margin:0 0 10px;gap:10px}
.st-back{flex:none;width:40px;height:40px;border-radius:50%;border:none;background:var(--card);color:var(--ink);
  display:grid;place-items:center;cursor:pointer;box-shadow:var(--shadow)}
.st-back svg{width:20px;height:20px}
.st-brand{flex:1;font-size:17px;font-weight:800;margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.st-btns{display:flex;gap:7px;align-items:center;flex:none}
.st-reset{background:var(--card);border:none;color:var(--ink);box-shadow:var(--shadow);
  font:inherit;font-size:12.5px;font-weight:700;padding:8px 13px;border-radius:999px;cursor:pointer}
.st-reset.arm{background:var(--pen);color:#fff}
#st-reset{display:none !important}   /* lives in the Me screen now */
.st-bar{height:7px;background:var(--soft);border-radius:999px;overflow:hidden}
.st-bar span{display:block;height:100%;background:linear-gradient(90deg,#8B5CF6,#5B3DF5);width:0;transition:width .35s ease;border-radius:999px}
.st-meta{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-soft);margin-top:8px;font-variant-numeric:tabular-nums}
.st-mbtn{font:inherit;font-size:12px;color:#fff;cursor:pointer;font-weight:700;
  background:var(--pen);border:none;padding:3px 10px;border-radius:999px;margin-left:2px}
.st-today-on .st-bar,.st-today-on .st-meta{display:none}
.st-today-on .st-top{margin:0}

/* floating glass tab bar */
.st-nav{position:fixed;left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));z-index:30;
  display:flex;justify-content:space-between;max-width:560px;margin:0 auto;
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--rule);border-radius:999px;padding:6px;box-shadow:0 10px 30px rgba(22,18,58,.16)}
.st-nav button{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;background:none;border:none;
  padding:7px 2px 6px;font:inherit;font-size:11px;font-weight:700;color:var(--ink-soft);cursor:pointer;border-radius:999px;
  transition:background .2s,color .2s}
.st-nav button svg{width:22px;height:22px;transition:transform .2s ease}
.st-nav button[aria-selected="true"]{color:var(--gold);background:var(--gold-wash)}
.st-nav button:active svg{transform:scale(.88)}

.st-main{padding:8px 16px 26px;max-width:640px;width:100%;margin:0 auto;animation:pkIn .3s ease both}
.st-foot{text-align:center;padding:0 18px calc(104px + env(safe-area-inset-bottom));font-size:12.5px;color:var(--ink-soft)}
@keyframes pkIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---- Practice: section scroller, filter chips, one start button ---- */
.ps-row{display:flex;gap:10px;overflow-x:auto;margin:0 -16px;padding:4px 16px 12px;scrollbar-width:none;scroll-snap-type:x proximity}
.ps-row::-webkit-scrollbar{display:none}
.ps-tile{flex:none;width:92px;display:flex;flex-direction:column;align-items:center;gap:4px;scroll-snap-align:center;
  background:var(--card);border:1.5px solid var(--rule);border-radius:20px;padding:12px 6px 10px;cursor:pointer;
  font:inherit;color:var(--ink);box-shadow:var(--shadow);transition:transform .12s,border-color .15s}
.ps-tile:active{transform:scale(.95)}
.ps-ic{font-size:30px;line-height:1.1}
.ps-name{font-size:12px;font-weight:700;line-height:1.25;text-align:center;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:30px}
.ps-tile small{font-size:11px;color:var(--ink-soft)}
.ps-tile.on{border-color:var(--gold);background:var(--gold-wash)}
.ps-chips{display:flex;gap:8px;overflow-x:auto;margin:0 -16px 14px;padding:0 16px;scrollbar-width:none}
.ps-chips::-webkit-scrollbar{display:none}
.ps-chip{flex:none;font:inherit;font-size:13px;font-weight:700;color:var(--ink);background:var(--card);
  border:1.5px solid var(--rule);border-radius:999px;padding:8px 14px;cursor:pointer}
.ps-chip span{color:var(--ink-soft);font-weight:600;margin-left:2px}
.ps-chip.on{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.ps-chip.on span{color:inherit;opacity:.7}
.ps-chip[disabled]{opacity:.4;cursor:default}
.ps-start{display:flex;align-items:center;justify-content:space-between;width:100%;text-align:left;cursor:pointer;
  font:inherit;color:#fff;background:var(--grad);border:none;border-radius:20px;padding:16px 18px;
  box-shadow:0 12px 28px rgba(91,61,245,.3);transition:transform .1s}
.ps-start:active{transform:scale(.98)}
.ps-start[disabled]{opacity:.5;box-shadow:none}
.ps-start b{display:block;font-size:17px}
.ps-start small{display:block;font-size:12.5px;opacity:.85;margin-top:2px}
.ps-arrow{font-size:22px;font-weight:800;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.18);display:grid;place-items:center}
.ps-prog{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-soft);margin:16px 2px 0}
.ps-prog b{color:var(--ink);font-weight:700}
.ps-topics{background:var(--card);border:1px solid var(--rule);border-radius:20px;box-shadow:var(--shadow);overflow:hidden}
.ps-topic{display:flex;align-items:center;gap:12px;width:100%;text-align:left;font:inherit;color:var(--ink);cursor:pointer;
  background:none;border:none;border-bottom:1px solid var(--rule);padding:14px 16px}
.ps-topic:last-child{border-bottom:none}
.ps-topic:active{background:var(--soft)}
.ps-tname{flex:1;min-width:0;font-size:14.5px;font-weight:700}
.ps-tname small{display:block;font-size:12px;font-weight:500;color:var(--ink-soft);margin-top:2px}
.ps-ring{--p:0;flex:none;width:30px;height:30px;border-radius:50%;background:conic-gradient(var(--ok) calc(var(--p)*1%),var(--soft) 0);
  -webkit-mask:radial-gradient(circle,transparent 9px,#000 10px);mask:radial-gradient(circle,transparent 9px,#000 10px)}

/* ---- Today tab ---- */
.td-hero{display:flex;align-items:center;gap:16px;background:var(--card);border-radius:22px;padding:18px;box-shadow:var(--shadow);border:1px solid var(--rule)}
.td-ring{--p:0;flex:none;width:74px;height:74px;border-radius:50%;display:grid;place-items:center;
  background:conic-gradient(var(--ok) calc(var(--p)*1%),var(--soft) 0);position:relative;transition:--p .6s}
.td-ring::before{content:"";position:absolute;inset:8px;border-radius:50%;background:var(--card)}
.td-ring span{position:relative;font-weight:800;font-size:17px}
.td-title{margin:0;font-size:19px;font-weight:800}
.td-sub{margin:3px 0 0;font-size:13px;color:var(--ink-soft);line-height:1.45}
.td-stats{display:flex;gap:10px;margin-top:12px}
.td-stat{flex:1;min-width:0;background:var(--grad);color:#fff;border-radius:16px;padding:11px 12px}
.td-stat b{display:block;font-size:20px;font-weight:800;line-height:1.15}
.td-stat b small{font-size:13px;font-weight:600;opacity:.6}
.td-stat span{font-size:11.5px;opacity:.88;line-height:1.3;display:block;margin-top:2px}
.td-stat:nth-child(2){background:linear-gradient(135deg,#FF8A1F,#FF5E62)}
.td-stat:nth-child(3){background:linear-gradient(135deg,#0E9F6E,#34C38F)}
.td-stat.light{background:var(--card);color:var(--ink);border:1px solid var(--rule);box-shadow:var(--shadow)}
.td-stat.light span{color:var(--ink-soft);opacity:1}
.td-tasks{display:flex;flex-direction:column;gap:10px;margin-top:16px}
.td-task{display:flex;align-items:center;gap:14px;width:100%;text-align:left;font:inherit;color:var(--ink);cursor:pointer;
  background:var(--card);border:1px solid var(--rule);border-radius:18px;padding:14px;box-shadow:var(--shadow);
  animation:pkIn .35s ease both;transition:transform .12s ease}
.td-task:active{transform:scale(.98)}
.td-ic{flex:none;width:46px;height:46px;border-radius:14px;display:grid;place-items:center}
.td-ic svg{width:24px;height:24px}
.td-ic-cards{background:var(--gold-wash);color:var(--gold)}
.td-ic-quiz{background:var(--tint-saffron);color:var(--saffron)}
.td-ic-fix{background:var(--pen-wash);color:var(--pen)}
.td-ic-mocks{background:var(--ok-wash);color:var(--ok)}
.td-txt{flex:1;min-width:0}
.td-txt b{display:block;font-size:15.5px}
.td-txt small{display:block;font-size:12.5px;color:var(--ink-soft);margin-top:2px}
.td-go{flex:none;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-size:22px;font-weight:700;
  background:var(--gold-wash);color:var(--gold)}
.td-task.done{background:var(--ok-wash);border-color:transparent}
.td-task.done .td-go{background:var(--ok);color:#fff;font-size:15px}
.td-done{margin-top:14px;display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ok);
  background:var(--ok-wash);border-radius:16px;padding:13px 15px}
.td-burst{font-size:24px;animation:pkPop .6s cubic-bezier(.3,1.6,.5,1) both}
@keyframes pkPop{from{transform:scale(.2) rotate(-30deg);opacity:0}to{transform:none;opacity:1}}
@media (prefers-reduced-motion:reduce){.st-main,.td-task,.td-burst{animation:none}}

/* ---- section filter ---- */
.st-filter{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 14px}
.st-chip{font:inherit;font-size:12.5px;padding:5px 12px;border-radius:20px;cursor:pointer;
  border:1px solid var(--rule);background:var(--card);color:var(--ink-soft)}
.st-chip[aria-pressed="true"]{border-color:var(--gold);background:var(--gold-wash);color:var(--gold);font-weight:600}

/* ---- flip card ---- */
.st-stage{perspective:1400px;touch-action:pan-y}
.st-flip{position:relative;transform-style:preserve-3d;transition:transform .42s cubic-bezier(.4,.1,.2,1);cursor:pointer;min-height:320px}
.st-flip.back{transform:rotateY(180deg)}
.st-face{
  background:var(--card);border:1px solid var(--rule);border-radius:22px;
  padding:40px 22px 26px;height:100%;font-size:16px;
  display:flex;flex-direction:column;justify-content:center;
  -webkit-backface-visibility:hidden;backface-visibility:hidden;
  box-shadow:0 10px 30px rgba(22,18,58,.08);
}
.st-face.rear{position:absolute;inset:0;transform:rotateY(180deg)}
.st-kind{position:absolute;top:14px;left:20px;font-size:.72em;color:var(--ink-soft);letter-spacing:.04em;
  max-width:70%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.st-mark{position:absolute;top:13px;right:18px;font-size:.75em;padding:2px 9px;border-radius:20px}
.st-mark.g{background:var(--ok-wash);color:var(--ok)}
.st-mark.m{background:var(--pen-wash);color:var(--pen)}
.st-front{font-size:1.35em;line-height:1.34;margin:0}
.st-answer{font-size:1.35em;line-height:1.36;margin:0;color:var(--ok)}
.st-alt{font-size:1.05em;line-height:1.4;margin:9px 0 0;color:var(--ink-soft)}
.st-note{font-size:.906em;color:var(--ink-soft);line-height:1.55;margin:16px 0 0;
  padding-top:14px;border-top:1px solid var(--rule)}
.st-note em{color:var(--ink);font-style:normal;font-weight:600}
.st-trap{font-size:.875em;color:var(--pen);margin:10px 0 0}
.st-src{font-size:.78em;color:var(--ink-soft);opacity:.75;margin:12px 0 0;font-style:italic}
.st-tapcue{text-align:center;font-size:.8125em;color:var(--ink-soft);margin:22px 0 0;opacity:.8}

.st-grade{display:flex;gap:10px;margin-top:14px}
.st-grade button{flex:1;padding:16px 8px;border-radius:16px;font:inherit;font-size:16px;font-weight:700;
  border:1.5px solid transparent;cursor:pointer;transition:transform .1s ease}
.st-grade button:active{transform:scale(.96)}
.st-grade .miss{background:var(--pen-wash);color:var(--pen)}
.st-grade .got{background:var(--ok-wash);color:var(--ok)}
.st-grade .miss[aria-pressed="true"]{background:var(--pen);color:#fff}
.st-grade .got[aria-pressed="true"]{background:var(--ok);color:#fff}
.st-nav2{display:flex;gap:10px;margin-top:10px;align-items:center}
.st-nav2 button{padding:12px 16px;border-radius:11px;border:1px solid var(--rule);
  background:var(--card);font:inherit;font-size:15px;color:var(--ink);cursor:pointer}
.st-nav2 button[disabled]{opacity:.38;cursor:default}
.st-nav2 .spacer{flex:1;text-align:center;font-size:12.5px;color:var(--ink-soft)}

/* ---- quiz ---- */
.st-q{background:var(--card);border:1px solid var(--rule);border-radius:20px;padding:20px 18px;box-shadow:var(--shadow)}
.st-diff{font-size:12px;color:var(--ink-soft);margin:0 0 12px;display:flex;justify-content:space-between;gap:8px}
.st-stem{font-size:17.5px;line-height:1.45;margin:0 0 20px;white-space:pre-line}
.st-opts{display:flex;flex-direction:column;gap:9px}
.st-opt{display:flex;gap:12px;align-items:flex-start;padding:14px 15px;border:1.5px solid var(--rule);
  border-radius:14px;background:var(--card);font:inherit;font-size:15.5px;text-align:left;
  cursor:pointer;color:var(--ink);width:100%}
.st-opt .ltr{color:var(--gold);font-weight:600;flex:none}
.st-opt[aria-checked="true"]{border-color:var(--ink);background:#F1EEFF}
.st-opt.correct{border-color:var(--ok);background:var(--ok-wash);color:var(--ok)}
.st-opt.correct .ltr{color:var(--ok)}
.st-opt.wrong{border-color:var(--pen);background:var(--pen-wash);color:var(--pen)}
.st-opt.wrong .ltr{color:var(--pen)}
.st-opt[disabled]{cursor:default}
.st-opt{transition:transform .1s ease,border-color .15s,background .15s}
.st-opt:active:not([disabled]){transform:scale(.98)}
.st-opt[aria-checked="true"]{box-shadow:0 0 0 3px rgba(91,61,245,.18)}
.st-opt.correct{animation:pkGood .45s cubic-bezier(.3,1.6,.5,1)}
.st-opt.wrong{animation:pkShake .4s ease}
.st-verdict{animation:pkIn .3s ease both}
@keyframes pkGood{0%{transform:scale(1)}40%{transform:scale(1.035)}100%{transform:scale(1)}}
@keyframes pkShake{0%,100%{transform:none}20%{transform:translateX(-7px)}40%{transform:translateX(6px)}60%{transform:translateX(-4px)}80%{transform:translateX(2px)}}
@media (prefers-reduced-motion:reduce){.st-opt.correct,.st-opt.wrong,.st-verdict{animation:none}}
.st-verdict{margin:20px 0 0;font-size:17px;font-weight:600}
.st-verdict.y{color:var(--ok)} .st-verdict.n{color:var(--pen)}
.st-expl{background:var(--ok-wash);border:1px solid #C9EEDD;border-radius:11px;
  padding:16px 17px;margin-top:12px;font-size:15px;line-height:1.6}
.st-expl p{margin:0 0 11px} .st-expl p:last-child{margin:0}
.st-cta{width:100%;margin-top:18px;padding:16px;border:none;border-radius:14px;
  background:var(--grad);color:#fff;font:inherit;font-size:16px;font-weight:600;cursor:pointer}
.st-cta[disabled]{background:#CFCBE3;cursor:default}
.st-cta.dark{background:var(--ink)}
.st-cta.ghost{background:none;border:1px solid var(--rule);color:var(--ink)}

.st-done{background:var(--card);border:1px solid var(--rule);border-radius:14px;padding:32px 24px;text-align:center}
.st-score{font-size:52px;line-height:1;margin:0 0 6px}
.st-done p{color:var(--ink-soft);margin:0 0 22px;font-size:15px}
.st-missbox{text-align:left;margin:20px 0 0;border-top:1px solid var(--rule);padding-top:18px}
.st-missbox h3{font-size:14px;margin:0 0 10px;color:var(--ink-soft);font-weight:600}
.st-missbox li{font-size:15px;margin-bottom:8px;line-height:1.4}

/* ---- practice chooser: section -> chapter ---- */
.st-plansec{margin:0 0 10px;font-size:13px;color:var(--ink-soft);font-weight:700;letter-spacing:.02em}
.st-crumb{background:none;border:none;font:inherit;font-size:13px;color:var(--gold);
  cursor:pointer;padding:0;margin:0 0 12px;font-weight:600}
.st-qbar{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.st-toggle{background:none;border:none;font:inherit;font-size:12.5px;color:var(--ink-soft);
  cursor:pointer;padding:0;margin:0 0 12px}
.st-toggle b{color:var(--ink)}
.st-flag{background:none;border:1px solid var(--rule);border-radius:20px;font:inherit;
  font-size:12px;color:var(--ink-soft);cursor:pointer;padding:4px 11px;flex:none}
.st-flag.on{border-color:var(--gold);background:var(--gold-wash);color:var(--gold);font-weight:600}
.st-peek{display:block;background:none;border:none;font:inherit;font-size:13.5px;
  color:var(--gold);font-weight:600;cursor:pointer;padding:0;margin:12px 0 0;text-decoration:underline}
.ch-progress{background:var(--card);border:1px solid var(--rule);border-radius:12px;
  padding:13px 16px 15px;margin-bottom:10px;box-shadow:var(--shadow)}
.ch-progrow{display:flex;justify-content:space-between;gap:10px;font-size:13px;
  color:var(--ink-soft);margin-bottom:8px}
.ch-progrow b{color:var(--gold);font-size:15px}
.ch-secprog{display:block;font-size:11.5px;color:var(--ink-soft);font-weight:400;margin-top:2px}
.ch-all{display:flex;justify-content:space-between;align-items:center;width:100%;
  font:inherit;font-size:15px;font-weight:600;color:var(--ink);cursor:pointer;
  background:var(--card);border:1px solid var(--rule);border-radius:12px;
  padding:15px 17px;margin-bottom:10px;box-shadow:var(--shadow)}
.ch-all span{font-weight:400;font-size:13px;color:var(--ink-soft)}
.ch-all:hover{border-color:var(--gold)}
.ch-all.miss{border-color:#F7C5C7;color:var(--pen)}
.ch-all.saved{border-color:#DCD3FF;color:var(--gold)}
.ch-all.today{background:var(--ink);border-color:var(--ink);color:#fff}
.ch-all.today span{color:#DCD3FF}
.ch-note{font-size:13px;color:var(--ink-soft);margin:-2px 2px 16px}
/* the honesty tip: once before the first flashcard, then a line under the buttons */
.st-gradehint{font-size:12.5px;color:var(--ink-soft);text-align:center;margin:8px 0 0}
.st-modal{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;
  padding:16px;background:rgba(22,18,58,.45)}
.st-modal-card{background:var(--card);color:var(--ink);border-radius:16px;max-width:420px;width:100%;
  padding:22px 20px 18px;box-shadow:var(--shadow);font-family:var(--sans);font-size:15px;line-height:1.55}
.st-modal-card h3{margin:0 0 10px;font-size:21px;font-weight:600}
.st-modal-card p{margin:0 0 10px}
.st-modal-small{font-size:13px;color:var(--ink-soft)}
.st-modal-card .st-cta{margin-top:8px;width:100%}
.ch-sec{background:var(--card);border:1px solid var(--rule);border-radius:12px;
  padding:15px 17px;margin-bottom:10px;box-shadow:var(--shadow)}
.ch-sechead{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:11px}
.ch-secname{font-weight:700;font-size:15px}
.ch-go{font:inherit;font-size:12.5px;color:var(--gold);font-weight:600;cursor:pointer;
  background:var(--gold-wash);border:1px solid #DCD3FF;border-radius:20px;padding:6px 13px;flex:none}
.ch-topics{display:flex;flex-wrap:wrap;gap:7px}
.ch-topic{font:inherit;font-size:13px;color:var(--ink);cursor:pointer;
  background:var(--paper);border:1px solid var(--rule);border-radius:9px;padding:8px 12px;text-align:left}
.ch-topic span{color:var(--ink-soft);font-size:11.5px}
.ch-topic:hover{border-color:var(--gold);background:var(--gold-wash)}

/* ---- mock tests ---- */
.mk-card{background:var(--card);border:1px solid var(--rule);border-radius:22px;
  padding:20px;margin-bottom:12px;box-shadow:var(--shadow)}
.mk-pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.mk-pills span{font-size:13px;font-weight:600;background:var(--soft);border-radius:999px;padding:6px 11px}
.mk-more{margin-top:12px}
.mk-more summary{cursor:pointer;font-size:13.5px;font-weight:700;color:var(--gold)}
.mk-row{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.mk-name{display:block;font-size:20px;font-weight:800}
.mk-facts{font-size:12.5px;color:var(--ink-soft);flex:none}
.mk-secs{font-size:13px;color:var(--ink-soft);margin:8px 0 0;line-height:1.55}
.mk-best{font-size:13px;color:var(--ok);margin:8px 0 0}
/* shown when the paper's pattern was guessed, not known */
.mk-caveat{font-size:12.5px;color:var(--pen);margin:8px 0 0;line-height:1.5}

/* today's slice of the study plan */
.today{margin:0 0 20px;padding:15px 17px;border-radius:13px;
  background:var(--paper-2,#FFFFFF);border:1px solid var(--line,rgba(0,0,0,.1))}
.today-row{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px}
.today-when{margin:0;font-size:13px;color:var(--ink-soft)}
.today-when b{color:var(--ink)}
.today-left{margin:0;font-size:12.5px;color:var(--pen)}
.today-bar{height:6px;border-radius:999px;background:rgba(0,0,0,.08);overflow:hidden;margin:11px 0}
.today-bar span{display:block;height:100%;background:var(--ok);border-radius:999px;
  transition:width .4s ease}
.today-task{margin:0 0 4px;font-family:var(--serif);font-size:16.5px}
.today-topics{margin:0 0 6px;font-size:13px;color:var(--ink-soft);line-height:1.55}
.today-how{margin:0;font-size:13px;color:var(--ink-soft);line-height:1.6}
.today-act{margin-top:12px;padding:9px 16px;font:inherit;font-size:13.5px;cursor:pointer;
  color:var(--ink);background:none;border:1px solid rgba(0,0,0,.18);border-radius:999px}
.today-act:hover{border-color:var(--ok);color:var(--ok)}

/* what this deck does and doesn't do for a written paper */
.st-format{font-size:13.5px;line-height:1.6;color:var(--gold);margin:0 0 18px;
  padding:12px 14px;border-radius:10px;
  background:rgba(91,61,245,.08);border:1px solid rgba(91,61,245,.25)}

/* quality-check rows on the plan tab: what the inspection pass found */
.q-row{display:flex;gap:9px;align-items:flex-start;font-size:13.5px;
  color:var(--ink-soft);line-height:1.55;margin:0 0 9px;padding-left:2px}
.q-dot{flex:none;width:7px;height:7px;border-radius:50%;margin-top:7px}
.q-ok .q-dot{background:var(--ok)}
.q-fixed .q-dot{background:var(--gold)}
.q-warn .q-dot{background:var(--pen)}
.q-warn{color:var(--pen)}
/* indented detail under a finding */
.q-sub{margin-left:16px;font-size:12.5px;font-style:italic;opacity:.85}
.q-sub .q-dot{display:none}

/* per-item caution shown on the question/card itself */
.st-notice{font-size:13px;line-height:1.55;margin:10px 0 0;padding:9px 12px;
  border-radius:9px;border:1px solid transparent}
.st-notice em{font-style:italic}
.st-warn{background:rgba(229,72,77,.07);border-color:rgba(229,72,77,.25);color:var(--pen)}
.st-info{background:rgba(91,61,245,.08);border-color:rgba(91,61,245,.25);color:var(--gold)}
.st-ok{background:rgba(14,159,110,.08);border-color:rgba(14,159,110,.28);color:var(--ok)}

/* "this looks wrong" - the student is the only checker holding the book */
.st-report{display:inline-block;margin-top:12px;padding:7px 13px;font:inherit;
  font-size:12.5px;color:var(--ink-soft);background:none;cursor:pointer;
  border:1px solid rgba(0,0,0,.14);border-radius:999px}
.st-report:hover{border-color:var(--pen);color:var(--pen)}
.st-report.on{border-color:var(--ok);color:var(--ok);background:rgba(14,159,110,.08)}
.st-reportwrap{margin-top:2px}
/* optional detail after flagging - the flag is already saved, this sharpens it */
.st-why{margin-top:10px;padding:11px 12px;border:1px solid var(--line, rgba(0,0,0,.12));
  border-radius:10px;background:rgba(0,0,0,.02)}
.st-why label{display:block;font-size:12.5px;color:var(--ink-soft);margin-bottom:6px}
.st-why textarea{width:100%;font:inherit;font-size:13.5px;padding:8px 10px;resize:vertical;
  border:1px solid rgba(0,0,0,.16);border-radius:8px;background:var(--paper,#fff);color:inherit}
.st-whysend{margin-top:8px;padding:6px 14px;font:inherit;font-size:12.5px;cursor:pointer;
  border:1px solid rgba(0,0,0,.16);border-radius:999px;background:none;color:inherit}
.st-whysend:hover{border-color:var(--ok);color:var(--ok)}
.st-whydone{margin:0;font-size:12.5px;color:var(--ok)}
.mk-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px}
.mk-timer{font-size:24px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.mk-timer.low{color:var(--pen)}
.inlinecta{width:auto;margin:0;padding:10px 18px;font-size:14px}
.mk-palette{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:14px}
.mk-pal{width:34px;height:34px;border-radius:8px;font:inherit;font-size:12.5px;cursor:pointer;
  border:1px solid var(--rule);background:var(--card);color:var(--ink-soft);
  font-variant-numeric:tabular-nums}
.mk-pal.done{background:var(--ok-wash);border-color:#B5E8D2;color:var(--ok);font-weight:600}
.mk-pal.marked{background:var(--gold-wash);border-color:var(--gold);color:var(--gold);font-weight:600}
.mk-pal.cur{outline:2px solid var(--ink);outline-offset:1px}
.mk-btns{display:flex;gap:9px;margin-top:16px}
.mk-b{flex:1;font:inherit;font-size:14px;padding:13px 8px;border-radius:10px;cursor:pointer;
  border:1px solid var(--rule);background:var(--card);color:var(--ink)}
.mk-b[disabled]{opacity:.4;cursor:default}
.mk-b.on{border-color:var(--gold);background:var(--gold-wash);color:var(--gold)}
.mk-b.primary{background:var(--ink);border-color:var(--ink);color:#fff;font-weight:600}
.mk-table{width:100%;border-collapse:collapse;margin:6px 0 20px;font-size:13.5px}
.mk-table th{font-size:11.5px;color:var(--ink-soft);font-weight:600;letter-spacing:.03em;
  border-bottom:1px solid var(--rule);padding:6px 8px;text-align:left}
.mk-table td{padding:8px;border-bottom:1px solid var(--rule);text-align:left}
.mk-table td:not(:first-child),.mk-table th:not(:first-child){text-align:center}
.mk-auto{color:var(--pen);font-size:13px;font-weight:600;margin:0 0 8px}

/* ---- plan tab (inside study) ---- */
.pl-concepts{font-size:12px;color:var(--gold);margin:6px 0 0}
.pl-topic{background:var(--card);border:1px solid var(--rule);border-radius:16px;padding:14px 16px;margin-bottom:10px;box-shadow:var(--shadow)}
.pl-row{display:flex;justify-content:space-between;gap:10px;align-items:center}
.pl-name{font-weight:700;font-size:15px}
.pl-chip{flex:none;font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:999px;background:var(--soft);color:var(--ink-soft)}
.pl-bar{height:6px;background:var(--soft);border-radius:999px;margin:10px 0 7px;overflow:hidden}
.pl-bar span{display:block;height:100%;border-radius:999px;background:var(--gold)}
.pl-strong .pl-chip{background:var(--ok-wash);color:var(--ok)} .pl-strong .pl-bar span{background:var(--ok)}
.pl-work .pl-chip{background:var(--tint-saffron);color:var(--saffron)} .pl-work .pl-bar span{background:var(--saffron)}
.pl-why{font-size:12.5px;color:var(--ink-soft);margin:0}
.pl-concepts,.pl-quota{display:none}
.pl-gap{border-color:var(--rule);background:var(--pen-wash)}
.pl-gap .pl-chip{background:var(--pen-wash);color:var(--pen)}
.pl-gap .pl-why{margin-top:6px}
.pl-canote{margin:8px 0 0;font-size:13px;line-height:1.5;color:var(--ink)} .pl-canote a{color:var(--pen)}

button:focus-visible,.st-flip:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
@media (prefers-reduced-motion:reduce){.st-flip{transition:none}}

.ch-next{display:flex;justify-content:space-between;align-items:center;gap:12px;
  font-size:13px;color:var(--ink-soft);padding:2px 4px 12px}
.ch-next.ready{color:var(--ink)}
.ch-next button{font:inherit;font-size:13px;font-weight:600;color:var(--gold);background:none;
  border:1px solid var(--gold);border-radius:8px;padding:5px 12px;cursor:pointer;white-space:nowrap}

/* pictures in questions (public/figures.js): drawn from exact data */
.pf-wrap{margin:14px 0 6px;overflow-x:auto;text-align:center}
.pf-fig{max-width:100%;height:auto;color:var(--ink);font-family:var(--sans)}
.pf-title{font-size:13px;font-weight:600;color:var(--ink-soft);margin:0 0 6px;text-align:center;font-family:var(--sans)}
.pf-grid{stroke:var(--rule);stroke-width:1}
.pf-axis{stroke:var(--ink-soft);stroke-width:1.2}
.pf-tick{font-size:11px;fill:var(--ink-soft)}
.pf-val{font-size:10.5px;fill:var(--ink);font-weight:600}
.pf-inside{font-size:11px;fill:#fff;font-weight:700}
.pf-slice{stroke:var(--card);stroke-width:1.5}
.pf-set{font-size:13px;font-weight:700}
.pf-region{font-size:14px;fill:var(--ink);font-weight:600}
.pf-frame{fill:none;stroke:var(--rule);stroke-width:1.2}
.pf-ask{stroke-dasharray:4 3}
.pf-line{stroke:var(--ink);stroke-width:1.6}
.pf-thin{stroke:var(--ink-soft);stroke-width:1.2}
.pf-dot{fill:var(--ink)}
.pf-point{font-size:13px;font-weight:700;fill:var(--ink)}
.pf-label{font-size:12px;fill:var(--ink-soft)}
.pf-note{font-size:10.5px;fill:var(--ink-soft);font-style:italic}
.pf-shape{stroke:var(--ink);stroke-width:2.4;fill:none}
.pf-solid{fill:var(--ink)}
.pf-letter{font-size:24px;font-weight:700;fill:var(--ink);font-family:var(--sans)}
.pf-mirror{stroke:var(--gold);stroke-width:2.2;stroke-dasharray:5 3}
.pf-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.pf-table{border-collapse:collapse;margin:0 auto;font-size:13.5px;font-family:var(--sans)}
.pf-table caption{font-weight:600;color:var(--ink-soft);padding-bottom:6px}
.pf-table th,.pf-table td{border:1px solid var(--rule);padding:6px 10px;text-align:left}
.pf-table td.n{text-align:right;font-variant-numeric:tabular-nums}
.pf-table th{background:var(--paper)}
/* a figure puzzle's options are pictures: two by two */
.st-opts.fig-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.st-opts.fig-opts .st-opt{justify-content:center;flex-direction:column;align-items:center;gap:4px;padding:10px 6px}
.st-optfig svg{width:96px;height:96px}
/* formulas (KaTeX) sit in the text at its size, and long ones scroll instead of overflowing */
.st-stem .katex,.st-expl .katex,.st-face .katex{font-size:1.05em}
.st-opt .katex{font-size:1.2em}   /* an option that is only a fraction must be readable on a phone */
.katex-display{overflow-x:auto;overflow-y:hidden;padding:2px 0}
/* a past mistake brought back in a mock test */
.st-again{font-size:12.5px;color:var(--gold);margin:4px 0 0;font-family:var(--sans)}

/* weekly self-report (study.js weekHtml) */
.wk{margin:0 0 20px;padding:15px 17px;border-radius:13px;border:1px solid var(--rule);background:var(--card)}
.wk-h,.wk-h2{margin:0 0 10px;font:600 11px/1.2 var(--sans);letter-spacing:.08em;color:var(--ink-soft)}
.wk-h span{font-weight:400;letter-spacing:0;margin-left:6px}
.wk-h2{margin:14px 0 6px}
.wk-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.wk-stat{display:flex;flex-direction:column;gap:2px;min-width:0}
.wk-stat b{font:600 22px/1.1 var(--serif);color:var(--ink)}
.wk-stat span{font-size:12px;color:var(--ink-soft)}
.wk-stat small,.wk-line small{font-size:12px;color:var(--ink-soft)}
.wk-up{font-size:11px;color:var(--ok)} .wk-down{font-size:11px;color:var(--pen)} .wk-same{font-size:11px;color:var(--ink-soft)}
.wk-line{margin:10px 0 0;font-size:14px;line-height:1.45}
.wk-quiet{margin:0;font-size:14px;line-height:1.5}
.wk-do{margin:0;padding-left:20px;font-size:14px;line-height:1.5}
.wk-do li{margin:0 0 6px}
.pr-note p{margin:0 0 8px} .pr-note ol{margin:0 0 8px;padding-left:20px} .pr-note li{margin:0 0 4px}

/* current affairs: monthly packs on the plan tab */
.ca-panel{margin:0 0 22px}
.ca-promo{background:linear-gradient(135deg,var(--tint-saffron),var(--pen-wash));border:1px solid var(--rule);border-radius:22px;padding:18px}
.ca-big{margin:0 0 4px;font-size:17px;font-weight:800}
.ca-lead{margin:0 0 4px;font-size:14px;line-height:1.55;color:var(--ink-soft)}
.ca-month{background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:14px 16px;margin-bottom:10px}
.ca-count{font-size:13px;color:var(--ink-soft)}
.ca-read{margin-top:8px}
.ca-read summary{cursor:pointer;font-size:14px;font-weight:600;color:var(--pen);padding:4px 0}
.ca-read ul{list-style:none;margin:8px 0 0;padding:0}
.ca-read li{padding:10px 0;border-top:1px solid var(--rule);font-size:14px;line-height:1.5;overflow-wrap:anywhere}
.ca-read li a{font-size:12.5px;color:var(--ink-soft)}
.ca-tag{display:block;font-size:11.5px;letter-spacing:.04em;text-transform:uppercase;color:var(--gold);margin-bottom:2px}
.ca-line{color:var(--ink-soft);font-size:13.5px}
.ca-foot{margin:6px 0 0;font-size:12.5px;line-height:1.5;color:var(--ink-soft)}
.ca-off{background:none;border:none;padding:0;margin-left:6px;color:var(--pen);font:inherit;text-decoration:underline;cursor:pointer}

.pl-reset{display:block;margin:26px auto 0;font:inherit;font-size:13px;font-weight:600;color:var(--ink-soft);
  background:none;border:1px solid var(--rule);border-radius:999px;padding:9px 16px;cursor:pointer}
.pl-reset.arm{color:#fff;background:var(--pen);border-color:var(--pen)}

/* Cards tab: same start button, in the tab's blue */
.ps-start.cards{background:linear-gradient(135deg,#1D4ED8,#3B82F6 60%,#60A5FA);box-shadow:0 12px 28px rgba(37,99,235,.28)}
.ps-start.soft{background:var(--card);color:var(--ink);border:1.5px solid var(--rule);box-shadow:var(--shadow);margin-top:10px}
.ps-start.soft .ps-arrow{background:var(--gold-wash);color:var(--gold)}
.ps-tic{flex:none;width:40px;height:40px;border-radius:12px;background:var(--soft);display:grid;place-items:center;font-size:21px}
.ps-topic .chev{color:var(--ink-soft);font-size:22px}
.ch-note{font-size:13px;color:var(--ink-soft);margin:10px 4px 6px;line-height:1.5}

/* ---- end of a round ---- */
.dn{position:relative;text-align:center;background:var(--card);border:1px solid var(--rule);border-radius:26px;padding:26px 18px 18px;box-shadow:var(--shadow);overflow:hidden}
.dn-ring{--p:0;width:150px;height:150px;margin:4px auto 12px;border-radius:50%;display:grid;place-items:center;position:relative;
  background:conic-gradient(var(--ok) calc(var(--p)*1%),var(--soft) 0);animation:pkPop .6s cubic-bezier(.3,1.5,.5,1) both}
.dn-ring::before{content:"";position:absolute;inset:13px;border-radius:50%;background:var(--card)}
.dn-ring span{position:relative;line-height:1}
.dn-ring b{font-size:40px;font-weight:800}
.dn-ring small{font-size:17px;color:var(--ink-soft);font-weight:700}
.dn-title{margin:4px 0 2px;font-size:23px;font-weight:800}
.dn-sub{margin:0 0 8px;font-size:13.5px;color:var(--ink-soft)}
.dn-pills{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin:10px 0 16px}
.dn-pills span:empty{display:none}
.dn-pills span{font-size:13px;font-weight:700;background:var(--soft);border-radius:999px;padding:6px 12px}
.dn-pills .ok{background:var(--ok-wash);color:var(--ok)} .dn-pills .no{background:var(--pen-wash);color:var(--pen)}
.dn-rate{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:18px;padding-top:14px;border-top:1px solid var(--rule);
  font-size:14px;font-weight:600;color:var(--ink-soft)}
.dn-rate button{width:46px;height:46px;border-radius:50%;border:1px solid var(--rule);background:var(--card);font-size:22px;cursor:pointer;transition:transform .1s}
.dn-rate button:active{transform:scale(.88)}
.dn-secs{text-align:left;margin:4px 0 16px}
.dn-sec{margin:0 0 10px}
.dn-secrow{display:flex;justify-content:space-between;gap:10px;font-size:13.5px}
.dn-secrow span{color:var(--ink-soft);flex:none}
.dn-bar{display:flex;height:7px;border-radius:999px;background:var(--soft);overflow:hidden;margin-top:5px}
.dn-bar i{display:block;height:100%} .dn-bar .g{background:var(--ok)} .dn-bar .r{background:var(--pen)}
.cf{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.cf i{position:absolute;top:-12px;width:8px;height:13px;border-radius:2px;opacity:0;animation:cfFall 1.6s ease-out forwards}
@keyframes cfFall{0%{opacity:1;transform:translate(0,0) rotate(0)}100%{opacity:0;transform:translate(var(--x),330px) rotate(var(--r))}}
.st-missbox{border-top:1px solid var(--rule)}
/* timed test */
.mk-top{position:sticky;top:76px;z-index:5;padding:6px 0}
.mk-timer{font-size:20px;background:var(--card);border:1px solid var(--rule);border-radius:999px;padding:8px 16px;box-shadow:var(--shadow)}
.mk-timer.low{background:var(--pen-wash);color:var(--pen);animation:pkPulse 1s ease-in-out infinite}
@keyframes pkPulse{50%{transform:scale(1.05)}}
.mk-grid{background:var(--card);border:1px solid var(--rule);border-radius:18px;padding:4px 14px;margin-bottom:12px;box-shadow:var(--shadow)}
.mk-grid summary{cursor:pointer;font-size:13.5px;font-weight:700;padding:10px 0;color:var(--ink-soft)}
.mk-grid .mk-palette{max-height:220px;overflow-y:auto;padding-bottom:10px}
.mk-pal{border-radius:10px}
.mk-b{border-radius:14px;font-weight:700}
.mk-b.primary{background:var(--grad);border:none}
.mk-auto{background:var(--pen-wash);border-radius:999px;display:inline-block;padding:6px 14px}

/* Plan tab: weekly report and monthly current affairs */
.wk{background:var(--card);border:1px solid var(--rule);border-radius:22px;padding:16px;box-shadow:var(--shadow);margin:0 0 18px}
.wk-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:2px}
.wk-title{margin:0;font-size:17px;font-weight:800}
.wk-when{font-size:12px;color:var(--ink-soft);background:var(--soft);border-radius:999px;padding:4px 10px}
.wk .td-stat em{font-style:normal;font-size:12px;margin-left:4px;background:rgba(255,255,255,.22);border-radius:999px;padding:1px 6px}
.wk-h2{margin:16px 0 8px;font-size:13px;font-weight:800;color:var(--ink-soft);letter-spacing:0}
.wk-chips{display:flex;flex-wrap:wrap;gap:6px}
.pl-chip.work{background:var(--tint-saffron);color:var(--saffron)}
.pl-chip.strong-c{background:var(--ok-wash);color:var(--ok)}
.wk-mock{display:flex;justify-content:space-between;align-items:center;margin-top:10px;background:var(--soft);border-radius:14px;padding:10px 12px;font-size:14px}
.wk-do p{margin:0 0 8px;font-size:14px;line-height:1.5}
.wk-quiet{margin:10px 0 0;font-size:14px;line-height:1.5}
.ca-month{border-radius:20px;box-shadow:var(--shadow)}
.ca-read summary{color:var(--gold)}
.ca-test{flex:none;font:inherit;font-size:13px;font-weight:800;color:#fff;background:var(--grad);border:none;border-radius:999px;padding:8px 14px;cursor:pointer}
.ca-test.done{background:var(--ok-wash);color:var(--ok)}
.ca-month .ca-count{margin:4px 0 0}
.ca-older .ca-month{box-shadow:none;border-left:none;border-right:none;border-radius:0;margin:0}
.pl-chip{max-width:100%;white-space:normal;line-height:1.35}
.wk-do{padding-left:0}