/* MCQ Tests design system — OMR answer-sheet motif, light/dark */
:root{
  --paper:#F8F9FD; --card:#FFFFFF; --ink:#0F1B3D; --muted:#5A6383;
  --line:#E3E6F2; --primary:#2B4BE0; --primary-soft:#EBEEFC;
  --good:#14915F; --good-soft:#E4F5EE; --bad:#D9403A; --bad-soft:#FBEAE9;
  --mark:#7A4FD8; --mark-soft:#F0EAFC; --accent:#F2A314; --accent-soft:#FDF3DD;
  --accent-text:#8A5B00;
  --shadow:0 1px 2px rgba(15,27,61,.05),0 8px 24px -12px rgba(15,27,61,.12);
  --r:14px;
}
[data-theme="dark"]{
  --paper:#0D1226; --card:#161D38; --ink:#E8EBF7; --muted:#9AA3C4;
  --line:#273052; --primary:#7E93FF; --primary-soft:#1E2750;
  --good:#3ECF95; --good-soft:#12321F; --bad:#F07A74; --bad-soft:#3A1A18;
  --mark:#B79BF5; --mark-soft:#2A1F45; --accent:#F5B644; --accent-soft:#38290C;
  --accent-text:#F5B644;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px -12px rgba(0,0,0,.5);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Plus Jakarta Sans',system-ui,sans-serif;background:var(--paper);color:var(--ink);line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3,.display{font-family:'Plus Jakarta Sans',system-ui,sans-serif;letter-spacing:-.01em}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:.92rem;color:var(--ink);background:var(--card);border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;width:100%}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary)}
label{font-size:.78rem;font-weight:600;color:var(--muted);display:block;margin:10px 0 4px}
.mono{font-family:'Space Mono',monospace}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
a{color:var(--primary)}
img{max-width:100%;border-radius:10px}

.topbar{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;gap:14px;height:60px}
.logo{display:flex;align-items:center;gap:9px;font-family:'Plus Jakarta Sans';font-weight:800;font-size:1.15rem;letter-spacing:-.01em;cursor:pointer;user-select:none}
.logo .bubble{width:26px;height:26px;border-radius:50%;border:2.5px solid var(--primary);display:grid;place-items:center}
.logo .bubble::after{content:"";width:12px;height:12px;border-radius:50%;background:var(--primary)}
.topnav{margin-left:auto;display:flex;align-items:center;gap:6px}
.navbtn{background:none;border:none;color:var(--muted);font-weight:600;font-size:.88rem;padding:8px 12px;border-radius:9px}
.navbtn:hover{color:var(--ink);background:var(--card)}
.navbtn.active{color:var(--primary);background:var(--primary-soft)}
.iconbtn{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--ink);font-size:1rem;display:grid;place-items:center}

.hero{padding:56px 0 26px}
.eyebrow{font-family:'Space Mono';font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--primary);font-weight:700}
.hero h1{font-size:clamp(2rem,5.4vw,3.2rem);font-weight:800;letter-spacing:-.025em;line-height:1.08;margin:12px 0 14px;max-width:640px}
.hero h1 .fill{position:relative;white-space:nowrap}
.hero h1 .fill::after{content:"";position:absolute;left:-2%;right:-2%;bottom:6%;height:34%;background:var(--accent-soft);z-index:-1;border-radius:4px}
.hero p{color:var(--muted);max-width:540px;font-size:1.02rem}
.classrow{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.classchip{border:1.5px solid var(--line);background:var(--card);color:var(--ink);font-weight:600;font-size:.9rem;padding:9px 16px;border-radius:999px;transition:.15s}
.classchip:hover{border-color:var(--primary)}
.classchip.on{background:var(--ink);color:var(--paper);border-color:var(--ink)}
[data-theme="dark"] .classchip.on{background:var(--primary);border-color:var(--primary);color:#0D1226}

.sec{padding:30px 0}
.sechead{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:16px;gap:10px;flex-wrap:wrap}
.sechead h2{font-size:1.3rem;font-weight:700;letter-spacing:-.01em}
.sechead span{color:var(--muted);font-size:.85rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(228px,1fr));gap:16px}

.tcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px;transition:transform .15s}
.tcard:hover{transform:translateY(-2px)}
.tags{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.pill{font-size:.68rem;font-weight:700;padding:3px 9px;border-radius:999px;letter-spacing:.02em}
.pill.free{background:var(--good-soft);color:var(--good)}
.pill.paid{background:var(--accent-soft);color:var(--accent-text)}
.pill.sub{background:var(--primary-soft);color:var(--primary)}
.pill.done{background:var(--mark-soft);color:var(--mark)}
.pill.warn{background:var(--bad-soft);color:var(--bad)}
.tcard h3{font-size:.95rem;font-weight:500;letter-spacing:0;line-height:1.42;color:var(--ink);opacity:.92}
.tmeta{display:flex;gap:14px;color:var(--muted);font-size:.82rem;flex-wrap:wrap}
.tmeta b{color:var(--ink)}
.go{margin-top:auto;align-self:flex-start;background:var(--primary);color:#fff;border:none;font-weight:700;font-size:.88rem;padding:10px 18px;border-radius:10px}
[data-theme="dark"] .go{color:#0D1226}
.go.ghost{background:var(--primary-soft);color:var(--primary)}
.score-line{font-size:.82rem;color:var(--muted)}

.plans{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
.plan{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.plan.best{border:2px solid var(--primary)}
.pname{font-weight:700}
.price{font-family:'Plus Jakarta Sans';font-size:1.7rem;font-weight:800;margin:6px 0 2px}
.per{color:var(--muted);font-size:.8rem}
.plan .desc{font-size:.85rem;color:var(--muted);margin:12px 0;flex:1}
.plan button{width:100%;border:none;border-radius:10px;padding:11px;font-weight:700;background:var(--primary-soft);color:var(--primary)}
.plan.best button{background:var(--primary);color:#fff}
[data-theme="dark"] .plan.best button{color:#0D1226}

.faq{max-width:720px}
.faq details{border-bottom:1px solid var(--line);padding:13px 0}
.faq summary{font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between}
.faq summary::after{content:"+";color:var(--muted);font-family:'Space Mono'}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);font-size:.9rem;padding-top:8px}
footer{border-top:1px solid var(--line);margin-top:40px;padding:26px 0;color:var(--muted);font-size:.82rem;display:flex;flex-wrap:wrap;gap:8px 22px}

.player{max-width:1180px;margin:0 auto;padding:18px 20px;display:grid;grid-template-columns:1fr 300px;gap:20px;align-items:start}
.phead{grid-column:1/-1;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.phead h2{font-size:1.05rem;letter-spacing:-.01em}
.timerbox{margin-left:auto;display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--line);padding:8px 14px;border-radius:12px}
.timerbox .t{font-family:'Space Mono';font-weight:700;font-size:1.05rem}
.timerbox.low{border-color:var(--bad);color:var(--bad)}
.qcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:24px}
.qtop{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px;font-size:.78rem}
.qnum{font-family:'Space Mono';font-weight:700;color:var(--primary)}
.qtag{color:var(--muted)}
.qtag.dEasy{color:var(--good)} .qtag.dMedium{color:var(--accent-text)} .qtag.dHard{color:var(--bad)}
.marksline{margin-left:auto;font-family:'Space Mono';font-size:.72rem;color:var(--muted)}
.qtext{font-size:1.05rem;font-weight:600;line-height:1.5;margin-bottom:6px;white-space:pre-wrap}
.qhint{font-size:.78rem;color:var(--muted);margin-bottom:16px}
.opt{display:flex;align-items:flex-start;gap:14px;border:1.5px solid var(--line);border-radius:12px;padding:13px 15px;margin-bottom:10px;cursor:pointer;transition:.12s;background:var(--card)}
.opt:hover{border-color:var(--primary)}
.opt .omr{flex:none;width:30px;height:30px;border-radius:50%;border:2px solid var(--muted);display:grid;place-items:center;font-family:'Space Mono';font-weight:700;font-size:.82rem;color:var(--muted);transition:.12s;margin-top:1px}
.opt.sel{border-color:var(--primary);background:var(--primary-soft)}
.opt.sel .omr{background:var(--ink);border-color:var(--ink);color:var(--paper)}
[data-theme="dark"] .opt.sel .omr{background:var(--primary);border-color:var(--primary);color:#0D1226}
.opt .otext{padding-top:3px;flex:1}
.opt.rvOK{border-color:var(--good);background:var(--good-soft)}
.opt.rvOK .omr{background:var(--good);border-color:var(--good);color:#fff}
.opt.rvBad{border-color:var(--bad);background:var(--bad-soft)}
.opt.rvBad .omr{background:var(--bad);border-color:var(--bad);color:#fff}
.opt.rvMiss{border-style:dashed;border-color:var(--good)}
.pbtns{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{border:none;border-radius:10px;padding:11px 18px;font-weight:700;font-size:.88rem;display:inline-block;text-decoration:none}
.btn.primary{background:var(--primary);color:#fff}
[data-theme="dark"] .btn.primary{color:#0D1226}
.btn.soft{background:var(--primary-soft);color:var(--primary)}
.btn.mark{background:var(--mark-soft);color:var(--mark)}
.btn.ghost{background:none;border:1.5px solid var(--line);color:var(--muted)}
.btn.danger{background:var(--bad);color:#fff}
.btn.sm{padding:7px 13px;font-size:.78rem}
.btn:disabled{opacity:.45;cursor:not-allowed}

.palette{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:18px;position:sticky;top:78px}
.palette h4{font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;font-family:'Space Mono';color:var(--muted);margin-bottom:12px}
.pgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.pcell{aspect-ratio:1;border-radius:50%;border:2px solid var(--line);background:none;font-family:'Space Mono';font-weight:700;font-size:.82rem;color:var(--muted);display:grid;place-items:center;transition:.12s}
.pcell.answered{background:var(--good);border-color:var(--good);color:#fff}
.pcell.marked{background:var(--mark);border-color:var(--mark);color:#fff}
.pcell.markedAnswered{background:var(--mark);border-color:var(--good);color:#fff;box-shadow:inset 0 0 0 2px var(--card)}
.pcell.current{outline:3px solid var(--accent);outline-offset:2px}
.legend{display:grid;gap:7px;margin-top:16px;font-size:.76rem;color:var(--muted)}
.legend div{display:flex;align-items:center;gap:8px}
.dot{width:13px;height:13px;border-radius:50%;flex:none}
.counts{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-size:.8rem;color:var(--muted);display:grid;gap:4px}
.counts b{color:var(--ink)}
.palette .btn{width:100%;margin-top:14px}

.warn{grid-column:1/-1;background:var(--bad-soft);color:var(--bad);border:1px solid var(--bad);border-radius:12px;padding:10px 16px;font-size:.85rem;font-weight:600;display:none}
.warn.show{display:block}

.overlay{position:fixed;inset:0;background:rgba(10,15,35,.55);display:none;place-items:center;z-index:100;padding:20px;overflow:auto}
.overlay.show{display:grid}
.modal{background:var(--card);border-radius:18px;padding:26px;max-width:430px;width:100%;box-shadow:0 24px 60px rgba(0,0,0,.35)}
.modal.wide{max-width:760px}
.modal h3{font-size:1.2rem;margin-bottom:8px;letter-spacing:-.01em}
.modal p{color:var(--muted);font-size:.9rem;margin-bottom:14px}
.mstats{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin-bottom:18px}
.mstat{background:var(--paper);border-radius:12px;padding:12px;text-align:center}
.mstat .n{font-family:'Plus Jakarta Sans';font-weight:800;font-size:1.4rem}
.mstat .l{font-size:.68rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.modal .row{display:flex;gap:10px;justify-content:flex-end;margin-top:16px}
.formerr{color:var(--bad);font-size:.82rem;font-weight:600;min-height:1.2em;margin-top:8px}
.switchline{font-size:.84rem;color:var(--muted);margin-top:14px;text-align:center}
.switchline a{cursor:pointer;font-weight:600}

.scorehero{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:28px;display:flex;gap:28px;align-items:center;flex-wrap:wrap;margin-bottom:20px}
.ring{position:relative;width:150px;height:150px;flex:none}
.ring svg{transform:rotate(-90deg)}
.ring .rc{position:absolute;inset:0;display:grid;place-items:center;text-align:center}
.ring .rc .big{font-family:'Plus Jakarta Sans';font-weight:800;font-size:1.8rem;line-height:1}
.ring .rc .sm{font-size:.72rem;color:var(--muted)}
.statgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:12px;flex:1;min-width:260px}
.stat{background:var(--paper);border-radius:12px;padding:14px}
.stat .n{font-family:'Plus Jakarta Sans';font-weight:800;font-size:1.3rem}
.stat .l{font-size:.72rem;color:var(--muted)}
.stat.g .n{color:var(--good)} .stat.b .n{color:var(--bad)} .stat.m .n{color:var(--muted)}
.rvq{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;margin-bottom:14px}
.expl{margin-top:12px;background:var(--paper);border-left:3px solid var(--primary);border-radius:0 10px 10px 0;padding:12px 16px;font-size:.9rem;color:var(--muted);white-space:pre-wrap}
.expl b{color:var(--ink)}
.verdict{font-size:.72rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;padding:3px 10px;border-radius:999px}
.verdict.ok{background:var(--good-soft);color:var(--good)}
.verdict.no{background:var(--bad-soft);color:var(--bad)}
.verdict.skip{background:var(--paper);color:var(--muted)}
.verdict.void{background:var(--mark-soft);color:var(--mark)}
.bmark{margin-left:auto;background:none;border:none;font-size:1.25rem;color:var(--muted)}
.bmark.on{color:var(--accent)}

.acard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:22px;margin-bottom:16px}
.acard h3{font-size:1rem;margin-bottom:14px;letter-spacing:-.01em}
.bar{display:grid;grid-template-columns:150px 1fr 52px;align-items:center;gap:12px;margin-bottom:10px;font-size:.85rem}
.bar .track{height:10px;background:var(--paper);border-radius:99px;overflow:hidden}
.bar .fillb{height:100%;border-radius:99px;background:var(--primary);transition:width .5s}
.bar .v{font-family:'Space Mono';font-size:.78rem;text-align:right;color:var(--muted)}
.chipline{display:flex;gap:8px;flex-wrap:wrap}
.chip2{padding:6px 13px;border-radius:999px;font-size:.82rem;font-weight:600}
.chip2.g{background:var(--good-soft);color:var(--good)}
.chip2.b{background:var(--bad-soft);color:var(--bad)}
.empty{text-align:center;color:var(--muted);padding:50px 20px}
.empty .display{font-size:1.2rem;color:var(--ink);margin-bottom:6px}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--ink);color:var(--paper);padding:12px 20px;border-radius:12px;font-weight:600;font-size:.88rem;opacity:0;transition:.3s;z-index:300;pointer-events:none;max-width:90vw;text-align:center}
.toast.show{transform:translateX(-50%);opacity:1}

/* ===== admin ===== */
.admin-shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}
.side{background:var(--card);border-right:1px solid var(--line);padding:18px 12px;position:sticky;top:0;height:100vh;overflow:auto}
.side .logo{padding:6px 10px 18px}
.sbtn{display:block;width:100%;text-align:left;background:none;border:none;color:var(--muted);font-weight:600;font-size:.88rem;padding:10px 12px;border-radius:9px;margin-bottom:2px}
.sbtn:hover{background:var(--paper);color:var(--ink)}
.sbtn.active{background:var(--primary-soft);color:var(--primary)}
.main{padding:26px 30px;max-width:1620px;min-width:0}
.qsplit{display:flex;gap:16px;align-items:flex-start}
.qlist{flex:1 1 0;min-width:0;overflow-x:auto}
.qpreview{flex:0 0 460px;position:sticky;top:12px;max-height:calc(100vh - 30px);overflow:auto;overflow-wrap:anywhere}
.qpreview img{max-width:100%}
@media (max-width:1200px){.qsplit{flex-direction:column}.qpreview{position:static;flex:1 1 auto;width:100%;max-height:none}}
.main h1{font-size:1.4rem;letter-spacing:-.01em;margin-bottom:18px}
table{width:100%;border-collapse:collapse;font-size:.85rem;background:var(--card);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
th,td{text-align:left;padding:11px 13px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:.7rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);background:var(--card)}
tr:last-child td{border-bottom:none}
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.filters input,.filters select{width:auto;min-width:130px}
.formgrid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.formgrid .full{grid-column:1/-1}
.kpis{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;margin-bottom:20px}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}
.kpi .n{font-family:'Plus Jakarta Sans';font-weight:800;font-size:1.6rem}
.kpi .l{font-size:.75rem;color:var(--muted)}
.inline-check{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--ink);margin:8px 0}
.inline-check input{width:auto}

@media (max-width:900px){
  .player{grid-template-columns:1fr}
  .palette{position:static;order:3}
  .topbar .wrap{height:auto;flex-wrap:wrap;padding:8px 0;gap:8px}
  .topnav{margin-left:0;width:100%;flex-wrap:wrap;justify-content:flex-start;gap:4px}
  .topnav .navbtn{font-size:.85rem;padding:6px 11px}
  .bar{grid-template-columns:96px 1fr 46px}
  .admin-shell{grid-template-columns:1fr}
  .side{position:static;height:auto;display:flex;flex-wrap:wrap;gap:4px;border-right:none;border-bottom:1px solid var(--line)}
  .side .logo{width:100%}
  .sbtn{width:auto}
  .formgrid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* ===== Redesigned student catalog: sidebar + sticky search + grouped SEO sections ===== */
.catwrap{max-width:1400px;margin:0 auto;padding:0 20px}
.catsearch{position:sticky;top:var(--topbar-h,60px);z-index:40;background:var(--paper);padding:12px 0;border-bottom:1px solid var(--line)}
.catsearch input{width:100%;padding:13px 18px;border:1.5px solid var(--line);border-radius:12px;font-size:1rem;background:var(--card)}
.catalog{display:grid;grid-template-columns:180px 1fr;gap:22px;align-items:start;margin-top:18px}
.catside{position:sticky;top:var(--cattop,138px);max-height:calc(100vh - var(--cattop,138px) - 16px);overflow:auto;padding-right:4px}
.fgroup{margin-bottom:20px}
.ftitle{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:8px}
.fsub{font-size:.68rem;font-weight:700;color:var(--muted);margin:10px 0 4px;opacity:.8}
.fitem{display:flex;justify-content:space-between;align-items:center;gap:8px;width:100%;text-align:left;padding:8px 12px;border-radius:9px;border:1px solid transparent;background:transparent;color:var(--ink);font-size:.9rem;font-weight:500;cursor:pointer;transition:.12s}
.fitem:hover{background:var(--primary-soft)}
.fitem.on{background:var(--primary-soft);color:var(--primary);font-weight:700}
.fcount{font-size:.72rem;color:var(--muted);background:var(--line);border-radius:8px;padding:1px 8px;font-weight:600}
.fitem.on .fcount{color:var(--primary)}
.cattitle{font-size:1.55rem;font-weight:800;letter-spacing:-.02em;margin:2px 0 4px}
.catintro{color:var(--muted);font-size:.95rem;margin-bottom:8px}
.catsec{font-size:1.15rem;font-weight:800;margin:22px 0 12px;display:flex;align-items:baseline;gap:10px}
.muted2{color:var(--muted);font-weight:500;font-size:.85rem}
.loadmore{text-align:center;margin:20px 0}
.loadmore button{border:1.5px solid var(--line);background:var(--card);color:var(--ink);padding:11px 24px;border-radius:999px;font-weight:600;font-size:.92rem;cursor:pointer;transition:.15s}
.loadmore button:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}
.tcard{transition:transform .16s ease, box-shadow .16s ease}
.tcard:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(15,27,61,.12)}
@media (max-width:860px){
  .catalog{grid-template-columns:1fr}
  .catside{position:static;max-height:none;display:flex;flex-wrap:wrap;gap:6px;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:6px}
  .fgroup{margin-bottom:8px;width:100%}
  .fitem{width:auto}
}

/* ===== catalog v2: top subject tabs, 4-col grid, category counts ===== */
.cathead{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin:2px 0 8px}
.catcounts{font-weight:700;font-size:.85rem;background:var(--primary-soft);color:var(--primary);padding:5px 13px;border-radius:999px}
.stabs{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 4px;border-bottom:1px solid var(--line);padding-bottom:10px}
.stab{border:1px solid transparent;background:transparent;color:var(--muted);font-weight:700;font-size:.9rem;padding:7px 15px;border-radius:9px;cursor:pointer;transition:.12s}
.stab:hover{background:var(--primary-soft);color:var(--primary)}
.stab.on{background:var(--primary);color:#fff}
.tabn{font-size:.72rem;opacity:.85;margin-left:3px;font-weight:600}
.grid.cat4{grid-template-columns:repeat(4,minmax(0,1fr))}
.psubs{font-size:.72rem;color:var(--muted);font-weight:500}
@media (max-width:1200px){.grid.cat4{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:900px){.grid.cat4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.grid.cat4{grid-template-columns:1fr}}

/* ===== grant-access modal: class cards + subject drill-down ===== */
.gclsrow{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 2px}
.gcls{border:1.5px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;padding:8px 14px;font-weight:600;font-size:.9rem;cursor:pointer;display:flex;align-items:center;gap:7px;transition:.12s}
.gcls:hover{border-color:var(--primary)}
.gcls.on{border-color:var(--primary);background:var(--primary-soft);color:var(--primary)}
.gcount{font-size:.7rem;background:var(--primary);color:#fff;border-radius:999px;padding:1px 7px;min-width:18px;text-align:center;font-weight:700}
.gcount:empty{display:none}
.gsubs{display:grid;grid-template-columns:1fr 1fr;gap:8px;max-height:34vh;overflow:auto;padding:2px}
.gsub{display:flex;align-items:center;gap:9px;padding:9px 11px;border:1px solid var(--line);border-radius:9px;font-size:.9rem;font-weight:500;cursor:pointer}
.gsub:hover{border-color:var(--primary)}
.gsub input{width:auto;margin:0}
@media (max-width:560px){.gsubs{grid-template-columns:1fr}}

/* ===== promo banner + blog placeholders (SEO space) ===== */
.promo-banner{display:block;margin:14px 0 0;padding:14px 20px;border-radius:12px;background:linear-gradient(100deg,var(--primary),#6b46ff);color:#fff;font-size:.95rem;font-weight:600;text-decoration:none}
.promo-banner span{opacity:.9;font-weight:700}
.blogcard{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s}
.blogcard:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(15,27,61,.12)}
.blogthumb{font-size:1.8rem;margin-bottom:8px}
.blogcard h3{font-size:.95rem;font-weight:600;line-height:1.35;margin-bottom:4px}
.blogcard p{font-size:.82rem;color:var(--muted)}

/* ===== package-selection cards with validity dropdown ===== */
.pcards2{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:16px}
.pcard2{border:1px solid var(--line);border-radius:16px;padding:18px;background:var(--card);box-shadow:var(--shadow)}
.pc2-scope{font-weight:700;font-size:1.05rem;margin-bottom:14px;line-height:1.35}
.pc2-mid{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin-bottom:14px}
.pc2-lbl{font-size:.72rem;color:var(--muted);font-weight:600;display:block;margin-bottom:4px}
.pc2-mid select{max-width:170px}
.pc2-price{text-align:right}
.pc2-per{font-family:'Plus Jakarta Sans';font-weight:800;font-size:1.35rem;line-height:1}
.pc2-per span{font-size:.8rem;color:var(--muted);font-weight:500}
.pc2-off{color:var(--good);font-size:.78rem;font-weight:700;margin-top:3px}
.pc2-foot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:13px;gap:12px}
.pc2-total{font-weight:800;font-size:1.2rem}
.pc2-totlbl{font-size:.72rem;color:var(--muted)}
.pc2-foot .go{width:auto;padding:10px 22px}

/* ===== mobile ===== */
@media (max-width:760px){
  .catwrap{padding:0 12px}
  .topbar .wrap,.topbar{flex-wrap:wrap}
  nav.mainnav,.mainnav{flex-wrap:wrap;gap:8px}
  .cattitle{font-size:1.25rem}
  .cathead{gap:8px}
  .stabs{overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch}
  .stab{white-space:nowrap}
  .pcards2{grid-template-columns:1fr}
  .promo-banner{font-size:.88rem;padding:12px 15px}
}

/* ===== package cards (reference-style, horizontal) ===== */
.pkgs{display:flex;flex-direction:column;gap:16px}
.pkg{display:grid;grid-template-columns:220px 1.3fr 1fr 200px;gap:20px;align-items:center;background:var(--card);border:1.5px solid #cdd9fb;border-radius:14px;padding:18px 20px;box-shadow:var(--shadow)}
.pkg-feats{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.pkg-feats-h{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin-bottom:6px}
.pkg-feat{font-size:.8rem;color:var(--ink);line-height:1.7;color:var(--primary)}
.pkg-title{font-weight:800;font-size:1.15rem;color:var(--primary)}
.pkg-sub{font-size:.85rem;color:var(--muted);margin-bottom:10px}
.pkg-vlbl{font-size:.75rem;font-weight:700;color:var(--ink);display:block;margin-bottom:4px}
.pkg-sel{max-width:220px}
.pkg-price{text-align:left}
.pkg-permonth{font-family:'Plus Jakarta Sans';font-weight:800;font-size:1.4rem;color:var(--primary)}
.pkg-permonth span{font-size:.8rem;color:var(--muted);font-weight:600}
.pkg-off{color:var(--primary);font-weight:700;font-size:.9rem;margin-top:2px}
.pkg-strike{color:var(--muted);text-decoration:line-through;font-size:.85rem}
.pkg-buybox{text-align:center;border-left:1px solid var(--line);padding-left:16px}
.pkg-amt{font-family:'Plus Jakarta Sans';font-weight:800;font-size:1.5rem;color:var(--primary)}
.pkg-amtlbl{font-size:.72rem;color:var(--muted);margin-bottom:10px}
.pkg-buy{background:var(--primary);color:#fff;border:none;border-radius:8px;padding:11px 26px;font-weight:700;font-size:.95rem;cursor:pointer;transition:.15s;width:100%}
.pkg-buy:hover{filter:brightness(1.08)}
@media (max-width:900px){
  .pkg{grid-template-columns:1fr 1fr;gap:14px}
  .pkg-feats{grid-column:1 / -1}
  .pkg-buybox{border-left:none;border-top:1px solid var(--line);padding-left:0;padding-top:12px;grid-column:1 / -1;text-align:left;display:flex;align-items:center;justify-content:space-between;gap:12px}
  .pkg-buy{width:auto}
}
@media (max-width:560px){.pkg{grid-template-columns:1fr}.pkg-price{text-align:left}}

/* ===== unlock button (blue) + plan highlight ===== */
.go.unlock{background:var(--primary);color:#fff;width:100%;text-align:center;align-self:stretch}
[data-theme="dark"] .go.unlock{color:#0D1226}
.go.unlock:hover{filter:brightness(1.06)}
.plan-flash{outline:3px solid var(--primary);outline-offset:3px;box-shadow:0 0 0 8px var(--primary-soft)!important;border-radius:14px}

/* ===== student landing page ===== */
.landing{max-width:1120px;margin:0 auto;padding:0 20px}
.lhero{text-align:center;padding:56px 10px 40px}
.leyebrow{font-family:'Space Mono',monospace;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--primary);font-weight:700;margin-bottom:14px}
.lhero h1{font-size:clamp(2rem,5vw,3.3rem);font-weight:800;line-height:1.08;letter-spacing:-.02em}
.lhero .fill{color:var(--primary)}
.lsub{max-width:720px;margin:16px auto 0;color:var(--muted);font-size:1.05rem;line-height:1.6}
.lcta{display:flex;gap:12px;justify-content:center;margin-top:26px;flex-wrap:wrap}
.lbtn{border:none;border-radius:12px;padding:14px 28px;font-weight:700;font-size:1rem;cursor:pointer;transition:.15s}
.lbtn-primary{background:var(--primary);color:#fff}
.lbtn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(43,75,224,.28)}
.lbtn-ghost{background:transparent;border:1.5px solid var(--line);color:var(--ink)}
.lbtn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.lstats{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;margin-top:36px}
.lstat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 26px;min-width:130px;box-shadow:var(--shadow)}
.lstat b{display:block;font-family:'Plus Jakarta Sans';font-weight:800;font-size:1.5rem;color:var(--primary)}
.lstat span{font-size:.82rem;color:var(--muted)}
.lsec{padding:34px 0}
.lh2{font-size:1.5rem;font-weight:800;text-align:center;margin-bottom:20px}
.lgrouplbl{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:8px;text-align:center}
.lchips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.lchip{border:1.5px solid var(--line);background:var(--card);color:var(--ink);font-weight:700;font-size:.95rem;padding:11px 22px;border-radius:999px;cursor:pointer;transition:.15s}
.lchip:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.lfeat{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.lfcard{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow)}
.lficon{font-size:2rem;margin-bottom:10px}
.lfcard h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.lfcard p{color:var(--muted);font-size:.92rem;line-height:1.55}
.lsteps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.lstep{text-align:center;padding:14px}
.lnum{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:var(--primary-soft);color:var(--primary);font-weight:800;font-size:1.2rem;margin-bottom:10px}
.lstep h3{font-size:1.05rem;font-weight:700;margin-bottom:6px}
.lstep p{color:var(--muted);font-size:.9rem}
.lcta2{text-align:center;background:linear-gradient(120deg,var(--primary),#6b46ff);color:#fff;border-radius:20px;padding:44px 20px;margin:20px 0}
.lcta2 h2{font-size:1.7rem;font-weight:800}
.lcta2 p{opacity:.9;margin:8px 0 20px}
.lcta2 .lbtn-primary{background:#fff;color:var(--primary)}
@media (max-width:760px){
  .lhero{padding:36px 6px 28px}
  .lfeat,.lsteps{grid-template-columns:1fr}
  .lstat{padding:12px 18px;min-width:110px}
}

[data-theme="dark"] .pkg-buy{color:#0D1226}

/* ===== My plans (student subscriptions) ===== */
.subgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}
.subcard{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow)}
.subcard.exp{opacity:.72}
.subtop{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.subname{font-weight:700;font-size:1.05rem}
.submeta{margin-top:6px}
.subdates{margin-top:12px;font-size:.88rem;color:var(--muted)}
.subdates b{color:var(--ink)}
.dleft{background:var(--primary-soft);color:var(--primary);font-weight:700;font-size:.8rem;padding:5px 12px;border-radius:999px;white-space:nowrap}
.dleft.soon{background:#fff2cc;color:#8a6d00}
.dexp{background:#fce4e4;color:#b02a37;font-weight:700;font-size:.8rem;padding:5px 12px;border-radius:999px}

/* ===== My Tests (owned tests + access chips) ===== */
.accessbar{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}
.accesschip{background:var(--primary-soft);color:var(--primary);font-weight:600;font-size:.8rem;padding:6px 12px;border-radius:999px}
.accesschip.soon{background:#fff2cc;color:#8a6d00}
.mysubj{margin-bottom:14px}
.mysubj-h{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:.95rem;padding:4px 12px;border-radius:8px;margin-bottom:8px}
.mysubj-h span{font-size:.72rem;opacity:.8}
.mytests{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
@media (max-width:1200px){.mytests{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:900px){.mytests{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.mytests{grid-template-columns:1fr}}
.mytest{display:flex;flex-direction:column;align-items:flex-start;gap:4px;text-align:left;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;cursor:pointer;transition:.15s;box-shadow:var(--shadow)}
.mytest:hover{border-color:var(--primary);transform:translateY(-2px)}
.mytest-name{font-weight:600;font-size:.92rem;line-height:1.35;color:var(--ink)}
.mytest-meta{font-size:.78rem;color:var(--muted)}
.mytest-meta b{color:var(--primary)}