:root{
  --bg:#F3F5FF; --surface:#FFFFFF; --text:#1B1F3B; --muted:#5C6185; --line:#DDE1F5;
  --ink:#2B3BB0; --ink-strong:#1E2A78; --on-ink:#FFFFFF;
  --side:#1E2A78; --side-text:#E8EBFF; --side-muted:#AEB6EA;
  --sun:#FFC83D; --on-sun:#2A2100;
  --print:#C2255C; --sheet:#FFF0F5; --sheet-line:#F4C6D6;
  --good:#1F9D6B; --good-soft:#E3F6EE; --bad:#D9480F; --bad-soft:#FFF0E6; --skip:#8A8FB3;
  --maths:#1971C2; --science:#1F9D6B; --english:#C2255C; --reasoning:#B7791F; --computers:#F5B800; --gk:#6741D9; --social:#C2410C;
  --t-maths:#1971C2; --t-science:#178A5C; --t-english:#B4235A; --t-reasoning:#9A6512; --t-computers:#F5B800; --t-gk:#6741D9; --t-social:#B5480F;
  --shade:rgba(10,12,30,.55);
  color-scheme:light;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#12142B; --surface:#1C1F3F; --text:#EEF0FF; --muted:#A5A9CF; --line:#2E3260;
    --ink:#8EA2FF; --ink-strong:#B8C4FF; --on-ink:#0E1130;
    --side:#161937; --side-text:#E8EBFF; --side-muted:#9AA1D6;
    --sun:#FFD43B; --on-sun:#231C00;
    --print:#F06595; --sheet:#24182E; --sheet-line:#5A2A44;
    --good:#3DD598; --good-soft:#123528; --bad:#FF8A4C; --bad-soft:#3A2214; --skip:#7C80A8;
    --maths:#74C0FC; --science:#3DD598; --english:#F06595; --reasoning:#F2B84B; --computers:#FFD43B; --gk:#B197FC; --social:#FF922B;
    --shade:rgba(0,0,0,.65);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#12142B; --surface:#1C1F3F; --text:#EEF0FF; --muted:#A5A9CF; --line:#2E3260;
  --ink:#8EA2FF; --ink-strong:#B8C4FF; --on-ink:#0E1130;
  --side:#161937; --side-text:#E8EBFF; --side-muted:#9AA1D6;
  --sun:#FFD43B; --on-sun:#231C00;
  --print:#F06595; --sheet:#24182E; --sheet-line:#5A2A44;
  --good:#3DD598; --good-soft:#123528; --bad:#FF8A4C; --bad-soft:#3A2214; --skip:#7C80A8;
  --maths:#74C0FC; --science:#3DD598; --english:#F06595; --reasoning:#F2B84B; --computers:#FFD43B; --gk:#B197FC; --social:#FF922B;
  --shade:rgba(0,0,0,.65);
  color-scheme:dark;
}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Atkinson Hyperlegible",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3,.display{font-family:"Poppins","Trebuchet MS",system-ui,sans-serif;line-height:1.15;margin:0;font-weight:700}
p{margin:0}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--muted)}
svg.ic{width:22px;height:22px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- shell ---------- */
.side{position:fixed;top:0;bottom:0;left:0;width:260px;background:var(--side);color:var(--side-text);overflow-y:auto;z-index:40;
  padding:calc(env(safe-area-inset-top,0px) + 18px) 14px calc(env(safe-area-inset-bottom,0px) + 24px)}
.main{margin-left:260px;min-height:100%}
body[data-mode="bare"] .side,body[data-mode="bare"] .topbar,
body[data-mode="test"] .side,body[data-mode="test"] .topbar{display:none}
body[data-mode="bare"] .main,body[data-mode="test"] .main{margin-left:0}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:"Poppins",system-ui,sans-serif;font-weight:800;font-size:23px;line-height:1;color:inherit}
.logo{height:34px;width:auto;flex:none;display:block}

.side .brand{padding:0 8px;white-space:nowrap}
.me{display:flex;align-items:center;gap:12px;margin:22px 0 18px;padding:14px 10px;border-radius:16px;background:rgba(255,255,255,.07)}
.avatar{width:52px;height:52px;border-radius:50%;background:var(--sun);color:var(--on-sun);display:grid;place-items:center;font-family:"Poppins",system-ui,sans-serif;font-weight:800;font-size:22px;flex:none}
.me-name{font-weight:700;line-height:1.2;word-break:break-word}
.me-class{font-size:14px;color:var(--side-muted)}
.nav-group{font-size:13px;font-weight:700;color:var(--side-muted);margin:18px 10px 6px}
.nav{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.nav button{display:flex;align-items:center;gap:12px;width:100%;min-height:46px;padding:0 12px;border:0;border-radius:12px;background:transparent;color:var(--side-text);font-weight:700;font-size:16px;text-align:left}
.nav button:hover{background:rgba(255,255,255,.09)}
.nav button[aria-current="page"]{background:var(--sun);color:var(--on-sun)}
.nav .count{margin-left:auto;background:rgba(255,255,255,.16);border-radius:999px;padding:0 9px;font-size:13px;line-height:22px}
.nav button[aria-current="page"] .count{background:rgba(0,0,0,.12)}
.topbar{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--surface);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:12px;min-height:64px;padding:0 24px}
.top-in h1{font-size:24px;flex:1}
.menu-btn{display:none;width:44px;height:44px;border-radius:12px;border:1.5px solid var(--line);background:transparent;align-items:center;justify-content:center}
.top-user{display:flex;align-items:center;gap:10px;font-weight:700}
.top-user .avatar{width:36px;height:36px;font-size:16px}
.scrim{display:none}
.page{max-width:1120px;padding:28px 24px 64px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:999px;border:2px solid transparent;font-weight:700;font-size:16px;line-height:1.2;text-decoration:none}
.btn-primary{background:var(--ink);color:var(--on-ink)}
.btn-dark{background:var(--ink-strong);color:var(--on-ink)}
.btn-sun{background:var(--sun);color:var(--on-sun)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-danger{background:transparent;border-color:var(--bad);color:var(--bad)}
.btn-ghost.is-marked{border-color:var(--sun);background:var(--sun);color:var(--on-sun)}
.btn-sm{min-height:38px;padding:0 16px;font-size:15px}
.btn:not([disabled]):hover{filter:brightness(1.07)}
.btn[disabled]{opacity:.4;cursor:not-allowed}
.btn-wide{width:100%}
.btn-link{background:none;border:0;padding:4px 2px;color:var(--ink);text-decoration:underline;text-underline-offset:3px;font-size:15px}

/* ---------- onboarding ---------- */
.onboard{padding:40px 20px 64px}
.onboard .brand{color:var(--ink-strong);display:flex;justify-content:center;margin-bottom:28px}
.panel{max-width:560px;margin:0 auto;background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:32px 28px}
.panel h1{font-size:clamp(30px,5vw,40px);color:var(--ink-strong)}
.panel > p{margin-top:8px}
.field{display:block;margin-top:24px}
.field > span,.classpick legend{display:block;font-weight:700;margin-bottom:8px}
.field input,.field select{width:100%;min-height:50px;border:2px solid var(--line);border-radius:12px;padding:0 14px;background:var(--bg);font-size:18px}
.field input:focus,.field select:focus{border-color:var(--ink);outline:none}
.classpick{border:0;padding:0;margin:24px 0 0}
.cgrid{display:flex;flex-wrap:wrap;gap:14px}
.cbub{width:62px;height:62px;border-radius:50%;border:2.5px solid var(--print);background:var(--surface);color:var(--print);font-family:"Poppins",system-ui,sans-serif;font-weight:700;font-size:26px;line-height:1}
.cbub[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--on-ink)}
.err{color:var(--bad);font-weight:700;min-height:26px;margin:18px 0 8px}

/* ---------- dashboard ---------- */
.sec-title{font-size:26px;margin:36px 0 14px}
.sec-title:first-child{margin-top:0}
.sec-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:36px 0 14px}
.sec-row .sec-title{margin:0}
.tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.tile{display:flex;flex-direction:column;align-items:flex-start;gap:8px;min-height:150px;padding:18px;border:0;border-radius:18px;background:var(--tc);color:#fff;text-align:left}
.tile:hover{filter:brightness(1.08)}
.tile-name{font-family:"Poppins",system-ui,sans-serif;font-weight:800;font-size:24px;line-height:1.1}
.tile-bubs{display:flex;gap:6px;margin-top:auto}
.tile-bubs i{width:16px;height:16px;border-radius:50%;border:2px solid rgba(255,255,255,.85)}
.tile-bubs i.f{background:#fff}
.tile-cov{font-size:14px;opacity:.95}
.tile-bar{display:block;width:100%;height:6px;border-radius:99px;background:rgba(255,255,255,.28);overflow:hidden}
.tile-bar span{display:block;height:100%;background:#fff;border-radius:99px}
.table-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:16px}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{padding:14px 18px;text-align:left;border-top:1px solid var(--line);vertical-align:middle}
thead th{border-top:0;font-size:14px;color:var(--muted);font-weight:700;background:var(--bg)}
.note{font-size:14px;color:var(--muted)}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.feature{background:var(--surface);border:2px solid var(--ink);border-radius:20px;padding:24px;display:flex;flex-direction:column;gap:8px}
.feature h3{font-size:26px;color:var(--ink-strong)}
.feature .btn{margin-top:auto;align-self:flex-start}
.feature p{margin-bottom:10px}
.frees{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.free{background:var(--surface);border:2px solid var(--sun);border-radius:20px;padding:22px;display:flex;flex-direction:column;gap:6px}
.free h3{font-size:23px}
.free p{margin-bottom:10px}
.free .btn{margin-top:auto;align-self:flex-start}

/* lists / perf */
.list{list-style:none;margin:0;padding:0;background:var(--surface);border:1px solid var(--line);border-radius:16px}
.list li{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 18px;border-top:1px solid var(--line);flex-wrap:wrap}
.list li:first-child{border-top:0}
.list .t{font-weight:700}
.list .s{font-size:14px;color:var(--muted)}
.list .r{display:flex;align-items:center;gap:12px}
.dot-sub{display:inline-block;width:12px;height:12px;border-radius:50%;background:var(--sc);margin-right:8px}
.pill{display:inline-block;padding:3px 12px;border-radius:999px;font-weight:700;font-size:14px;white-space:nowrap}
.pill.hi{background:var(--good-soft);color:var(--good)}
.pill.mid{background:var(--sun);color:var(--on-sun)}
.pill.lo{background:var(--bad-soft);color:var(--bad)}
.pill.none{background:var(--line);color:var(--muted)}
.summary{display:flex;flex-wrap:wrap;gap:12px 40px;margin:0}
.summary div{min-width:140px}
.summary dt{color:var(--muted);font-size:15px}
.summary dd{margin:2px 0 0;font-family:"Poppins",system-ui,sans-serif;font-weight:700;font-size:28px}
.empty{background:var(--surface);border:1.5px dashed var(--line);border-radius:16px;padding:22px;color:var(--muted)}
.bar{height:10px;border-radius:99px;background:var(--line);overflow:hidden}
.bar > span{display:block;height:100%;background:var(--sc);border-radius:99px}
.breakdown{display:grid;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px}
.bd-row{display:grid;grid-template-columns:160px 1fr 56px;gap:12px;align-items:center;font-weight:700}
.bd-row .bd-name{color:var(--sc)}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{min-height:44px;padding:0 16px;border-radius:999px;border:2px solid var(--sc,var(--line));background:transparent;font-weight:700;color:var(--text)}
.chip[aria-pressed="true"]{background:var(--sc,var(--ink));color:#fff;border-color:var(--sc,var(--ink))}
.chip.n{--sc:var(--ink)}
.chip.n[aria-pressed="true"]{color:var(--on-ink)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:24px;max-width:720px}
.card h2{font-size:22px;margin-bottom:12px}
.card + .card{margin-top:18px}
.toast{position:fixed;left:50%;bottom:calc(env(safe-area-inset-bottom,0px) + 24px);transform:translateX(-50%);background:var(--text);color:var(--bg);padding:12px 20px;border-radius:999px;font-weight:700;z-index:60}

/* ---------- test ---------- */
.testbar{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--surface);border-bottom:1px solid var(--line)}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.testbar-in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:68px;padding-top:8px;padding-bottom:8px}
.tb-class{font-size:14px;color:var(--muted)}
.tb-title{font-size:clamp(20px,3vw,26px)}
.tb-right{display:flex;align-items:center;gap:12px}
.timer{font-family:"Poppins",system-ui,sans-serif;font-weight:700;font-size:22px;font-variant-numeric:tabular-nums;padding:4px 14px;border-radius:999px;background:var(--bg);border:1.5px solid var(--line)}
.timer.low{background:var(--bad-soft);color:var(--bad);border-color:var(--bad)}
.test-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;padding-top:24px;padding-bottom:64px;align-items:start}
.qcard{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:28px}
.qmeta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--muted);font-weight:700}
.tag{display:inline-block;padding:2px 12px;border-radius:999px;border:1.5px solid var(--sc);color:var(--sc);font-size:14px;font-weight:700}
.qtext{font-family:"Atkinson Hyperlegible",system-ui,sans-serif;font-size:clamp(20px,2.6vw,24px);line-height:1.4;margin-top:14px;max-width:60ch}
.opts{display:grid;gap:12px;margin-top:22px}
.opt{display:flex;align-items:center;gap:14px;width:100%;text-align:left;padding:12px 16px;border:2px solid var(--line);border-radius:14px;background:var(--surface);font-size:18px;min-height:58px}
.opt:hover{border-color:var(--ink)}
.bub{flex:none;width:34px;height:34px;border-radius:50%;border:2px solid var(--print);color:var(--print);display:grid;place-items:center;font-family:"Poppins",system-ui,sans-serif;font-weight:700;font-size:17px;line-height:1}
.opt.sel{border-color:var(--ink)}
.opt.sel .bub{background:var(--ink);border-color:var(--ink);color:var(--on-ink)}
.clear{margin-top:12px}
.qactions{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:24px}
.qa-right{display:flex;gap:10px;flex-wrap:wrap}
.hint{margin-top:20px;font-size:14px;color:var(--muted)}
.sheet{background:var(--sheet);border:2px solid var(--sheet-line);border-radius:16px;padding:18px 14px;position:sticky;top:calc(env(safe-area-inset-top,0px) + 88px)}
.sheet h2{font-size:22px;color:var(--print);padding:0 6px}
.sheet-sub{font-size:14px;color:var(--muted);padding:0 6px;margin-top:2px}
.rows{margin-top:10px;max-height:56vh;overflow-y:auto;padding-right:2px}
.grp{font-size:13px;font-weight:700;color:var(--print);margin:12px 6px 4px;border-bottom:1px solid var(--sheet-line);padding-bottom:2px}
.row{display:flex;align-items:center;gap:8px;padding:5px 6px;border-radius:10px}
.row.cur{background:var(--surface);box-shadow:inset 0 0 0 1.5px var(--sheet-line)}
.num{width:34px;height:28px;border:0;background:none;color:var(--print);font-weight:700;font-size:15px;text-align:left;padding:0 4px;border-radius:6px}
.row.marked .num{background:var(--sun);color:var(--on-sun);text-align:center}
.b{width:28px;height:28px;border-radius:50%;border:1.5px solid var(--print);background:transparent;color:var(--print);font-size:12px;font-weight:700;padding:0;line-height:1}
.b.fill{background:var(--ink);border-color:var(--ink);color:var(--on-ink)}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:14px;padding:0 6px;font-size:13px;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.lg{display:inline-block;width:14px;height:14px;border-radius:50%;border:1.5px solid var(--print)}
.lg.fill{background:var(--ink);border-color:var(--ink)}
.lg.mk{border-radius:4px;background:var(--sun);border-color:var(--sun)}

/* ---------- modal ---------- */
.modal-back{position:fixed;inset:0;z-index:70;background:var(--shade);display:grid;place-items:center;padding:20px}
.modal{background:var(--surface);border-radius:22px;padding:26px;max-width:440px;width:100%}
.modal h2{font-size:26px}
.modal p{margin-top:8px;color:var(--muted)}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap;margin-top:22px}

/* ---------- result ---------- */
.result{padding-top:32px;padding-bottom:64px}
.res-hero{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:30px}
.notice{background:var(--bad-soft);color:var(--bad);font-weight:700;border-radius:12px;padding:10px 14px;margin-bottom:18px}
.score{display:flex;align-items:baseline;gap:12px;margin-top:6px;color:var(--ink-strong);flex-wrap:wrap}
.score .n{font-size:clamp(64px,10vw,96px);line-height:1}
.score .of{font-size:24px;color:var(--muted)}
.res-msg{font-size:clamp(24px,3.4vw,32px);margin-top:6px}
.counts{list-style:none;padding:0;margin:18px 0 0;display:flex;flex-wrap:wrap;gap:8px 22px;font-weight:700}
.counts li{display:inline-flex;align-items:center;gap:8px}
.dot{width:12px;height:12px;border-radius:50%;display:inline-block}
.dot.good{background:var(--good)} .dot.bad{background:var(--bad)} .dot.skip{background:var(--skip)}
.res-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.review{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.rev{background:var(--surface);border:1px solid var(--line);border-left:6px solid var(--skip);border-radius:16px;padding:20px}
.rev.right{border-left-color:var(--good)} .rev.wrong{border-left-color:var(--bad)}
.rev-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rev-n{font-weight:700;color:var(--muted)}
.pill.right{background:var(--good-soft);color:var(--good)}
.pill.wrong{background:var(--bad-soft);color:var(--bad)}
.pill.skipped{background:var(--line);color:var(--muted)}
.rev-q{font-size:19px;font-weight:700;margin-top:10px;max-width:65ch}
.rev-opts{list-style:none;padding:0;margin:12px 0 0;display:grid;gap:8px}
.ro{display:flex;align-items:center;gap:12px;padding:8px 12px;border-radius:12px;border:1.5px solid transparent}
.ro .bub{width:30px;height:30px;font-size:15px}
.ro.right{background:var(--good-soft);border-color:var(--good)}
.ro.right .bub{background:var(--good);border-color:var(--good);color:var(--surface)}
.ro.wrong{background:var(--bad-soft);border-color:var(--bad)}
.ro.wrong .bub{background:var(--bad);border-color:var(--bad);color:var(--surface)}
.ro-tag{margin-left:auto;font-size:13px;font-weight:700;white-space:nowrap}
.ro.right .ro-tag{color:var(--good)} .ro.wrong .ro-tag{color:var(--bad)}
.why{margin-top:12px;color:var(--muted);max-width:70ch}
.why strong{color:var(--text)}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .side{transform:translateX(-100%);transition:transform .2s ease}
  .side.open{transform:none}
  .main{margin-left:0}
  .menu-btn{display:inline-flex}
  .scrim.on{display:block;position:fixed;inset:0;background:var(--shade);z-index:35}
  .top-in{padding:0 16px}
  .page{padding:22px 16px 56px}
}
@media (max-width:860px){
  .test-grid{grid-template-columns:1fr}
  .sheet{position:static}
  .rows{max-height:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:2px 10px}
  .grp{grid-column:1/-1}
}
@media (max-width:640px){
  .top-user span{display:none}
  .top-in h1{font-size:21px}
  .qcard{padding:20px}
  .panel{padding:26px 20px}
  .testbar-in .btn{padding:0 14px}
  .tb-class{display:none}
  .bd-row{grid-template-columns:110px 1fr 48px}
  .ro-tag{display:none}
  .tiles{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tile{min-height:136px;padding:16px}
  .tile-name{font-size:21px}
}
@media (prefers-reduced-motion: reduce){*{transition:none !important;animation:none !important}}

/* ===================== additions for the live site ===================== */
[hidden]{display:none !important}
a{color:var(--ink)}
.nav a{display:flex;align-items:center;gap:12px;width:100%;min-height:46px;padding:0 12px;border-radius:12px;color:var(--side-text);font-weight:700;font-size:16px;text-decoration:none}
.nav a:hover{background:rgba(255,255,255,.09)}
.top-actions{display:flex;align-items:center;gap:10px}

/* auth / landing */
.auth{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}
.pitch{background:var(--side);color:var(--side-text);padding:56px 48px;display:flex;flex-direction:column;justify-content:center;gap:22px}
.pitch .brand{font-size:28px}
.pitch h1{font-size:clamp(34px,4.4vw,54px);color:#fff}
.pitch p{font-size:19px;color:var(--side-muted);max-width:46ch}
.pitch ul{list-style:none;padding:0;margin:0;display:grid;gap:12px;font-size:18px}
.pitch li{display:flex;gap:12px;align-items:flex-start}
.pitch li::before{content:"";flex:none;width:20px;height:20px;margin-top:3px;border-radius:50%;background:var(--sun)}
.pitch .subs{display:flex;flex-wrap:wrap;gap:8px}
.pitch .subs span{border:1.5px solid rgba(255,255,255,.35);border-radius:999px;padding:3px 12px;font-size:15px}
.auth-side{display:flex;align-items:center;justify-content:center;padding:40px 20px}
.auth .panel{width:100%;max-width:460px}
.panel h2{font-size:30px;color:var(--ink-strong)}
.tabs{display:flex;gap:6px;background:var(--bg);border-radius:999px;padding:5px;margin-bottom:22px}
.tabs button{flex:1;min-height:42px;border:0;border-radius:999px;background:transparent;font-weight:700}
.tabs button[aria-selected="true"]{background:var(--surface);box-shadow:0 1px 4px rgba(0,0,0,.12);color:var(--ink-strong)}
.field small{display:block;color:var(--muted);font-size:14px;margin-top:4px}
.field select.sm,.field input.sm{min-height:44px;font-size:16px}
.ok-msg{background:var(--good-soft);color:var(--good);font-weight:700;border-radius:12px;padding:12px 14px;margin:14px 0}
.links{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:14px}
.loading{min-height:60vh;display:grid;place-items:center;color:var(--muted);font-weight:700}
.setup-warn{max-width:640px;margin:60px auto;padding:28px;background:var(--surface);border:2px solid var(--bad);border-radius:20px}
.setup-warn h1{font-size:28px;color:var(--bad);margin-bottom:10px}
.setup-warn code{background:var(--bg);padding:2px 6px;border-radius:6px}

/* admin */
.toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end;margin-bottom:16px}
.toolbar .field{margin:0}
.toolbar .field > span{font-size:14px;margin-bottom:4px}
.toolbar .grow{flex:1;min-width:200px}
.toolbar .spacer{flex:1}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px}
.stat dt{color:var(--muted);font-size:15px}
.stat dd{margin:4px 0 0;font-family:"Poppins",system-ui,sans-serif;font-weight:800;font-size:34px;color:var(--ink-strong);line-height:1.1}
td.qcell{max-width:420px}
td .clip{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
td.acts{white-space:nowrap;text-align:right}
td.acts .btn{margin-left:6px}
tr.off td{opacity:.55}
.pager{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:14px;flex-wrap:wrap}
.modal.wide{max-width:680px;max-height:calc(100vh - 40px);overflow-y:auto}
.modal .field{margin-top:16px}
.modal textarea,.field textarea{width:100%;min-height:90px;border:2px solid var(--line);border-radius:12px;padding:10px 14px;background:var(--bg);font:inherit;font-size:16px;color:inherit;resize:vertical}
.modal textarea:focus,.field textarea:focus{border-color:var(--ink);outline:none}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
.grid3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0 14px}
.optrow{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:center;margin-top:10px}
.optrow input[type="text"]{width:100%;min-height:46px;border:2px solid var(--line);border-radius:12px;padding:0 12px;background:var(--bg);font-size:16px}
.optrow label{display:flex;align-items:center;gap:6px;font-weight:700}
.check{display:flex;align-items:center;gap:10px;margin-top:16px;font-weight:700}
.check input{width:20px;height:20px}
.import-errs{max-height:160px;overflow:auto;background:var(--bad-soft);color:var(--bad);border-radius:12px;padding:10px 14px;font-size:14px;margin-top:12px}
.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:13px;font-weight:700;background:var(--line);color:var(--muted)}
.badge.on{background:var(--good-soft);color:var(--good)}
.badge.admin{background:var(--sun);color:var(--on-sun)}
tr.click{cursor:pointer}
tr.click:hover td{background:var(--bg)}

@media (max-width:900px){
  .auth{grid-template-columns:1fr}
  .pitch{padding:36px 22px}
}
@media (max-width:640px){
  .grid2,.grid3{grid-template-columns:1fr}
  td.acts .btn{margin:4px 0 0 6px}
}
.tile[disabled],.chip[disabled]{opacity:.5;cursor:not-allowed;filter:grayscale(.4)}
td .dot-sub{vertical-align:middle}
td.nw{white-space:nowrap}
.stats{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}
@media (max-width:900px){.auth-side{order:-1;padding-top:24px}.pitch ul{display:none}}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.01em}
.badge.off{background:var(--bad-soft);color:var(--bad)}
.logincard{margin-top:16px;border:2px dashed var(--ink);border-radius:16px;padding:16px 18px;display:grid;gap:10px;background:var(--bg)}
.logincard div{display:grid;grid-template-columns:110px 1fr;gap:10px;align-items:baseline}
.logincard span{color:var(--muted);font-size:14px}
.logincard b{font-size:17px;word-break:break-all}
.card h3 .badge{margin-left:8px;vertical-align:middle}
.waitbox{max-width:560px;margin:60px auto;padding:30px;background:var(--surface);border:1px solid var(--line);border-radius:22px}
.waitbox h1{font-size:28px;color:var(--ink-strong)}
.waitbox p{margin-top:10px}
@media (max-width:640px){.logincard div{grid-template-columns:1fr;gap:0}}
.enrol-note{margin-top:18px;padding:12px 14px;border-radius:12px;background:var(--bg);color:var(--muted);font-size:15px}
.enrol-note a{font-weight:700}
#slist td:first-child{white-space:nowrap}
/* light login page, matching the homepage */
.pitch{background:linear-gradient(180deg,#EEF1FF 0%,#F7F8FF 100%);color:var(--text)}
.pitch h1{color:var(--ink-strong)}
.pitch p{color:var(--muted)}
.pitch .subs span{border-color:var(--line);color:var(--ink-strong);background:#fff}
.auth-side{background:#fff}
/* free plan */
.plan-banner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;background:linear-gradient(100deg,#FFF6D6,#FFE9A8);border:2px solid var(--sun);border-radius:20px;padding:20px 24px;margin-bottom:28px}
.plan-banner h2{font-size:22px;color:#4A3B00}
.plan-banner p{margin-top:4px;color:#5C4A00;max-width:62ch}
.plan-banner p b{display:inline-block;margin-left:6px;color:#2A2100}
.plan-banner .btn{box-shadow:0 4px 0 #E0A21A}
svg.lock{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;vertical-align:-2px;margin-right:6px}
.locked{display:flex;align-items:center;gap:16px;flex-wrap:wrap;background:var(--surface);border:2px dashed var(--line);border-radius:16px;padding:20px 22px}
.locked p{flex:1;min-width:240px;color:var(--muted)}
.locked svg.lock{width:26px;height:26px;color:var(--ink);flex:none}
/* social login */
.social{display:grid;gap:10px;margin-top:20px}
.btn-social{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;min-height:50px;border-radius:12px;border:2px solid var(--line);background:#fff;font-weight:700;font-size:16px;color:#1B1F3B;cursor:pointer}
.btn-social:hover{border-color:var(--ink)}
.btn-social svg{width:22px;height:22px;flex:none}
.btn-social[disabled]{opacity:.6}
.or{display:flex;align-items:center;gap:12px;margin:20px 0 0;color:var(--muted);font-size:14px}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--line)}
.or + .field{margin-top:12px}
.badge.free{background:#FFF1C9;color:#7A5600}
.panel .cgrid{gap:10px}
.panel .cbub{width:54px;height:54px;font-size:23px}

/* ===== My content dropdown ===== */
.nav button .chev{width:18px;height:18px;margin-left:auto;fill:none;stroke:currentColor;stroke-width:2.2;transition:transform .2s}
.nav button[aria-expanded="true"] .chev{transform:rotate(180deg)}
.nav button.in-section{background:rgba(255,255,255,.09)}
.subnav{list-style:none;margin:2px 0 6px;padding:0 0 0 22px;display:grid;gap:1px}
.subnav button{min-height:40px;font-weight:600;font-size:15px;padding:0 10px}
.sdot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--sc);flex:none;box-shadow:0 0 0 2px rgba(255,255,255,.5)}

/* ===== subject page ===== */
.crumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--muted);margin-bottom:18px}
.crumbs .btn-link{font-size:14px;padding:0}
.crumbs b{color:var(--text)}
.ccards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.ccard{background:var(--surface);border:1px solid var(--line);border-radius:20px;overflow:hidden;display:flex;flex-direction:column}
.ccard header{background:var(--sc);color:#fff;padding:20px 22px}
.ccard header h2{font-size:22px}
.ccard header p{margin-top:4px;opacity:.92;font-size:15px}
.cbar{position:relative;margin:20px 22px 4px;height:26px;border-radius:99px;background:var(--bg);overflow:hidden;border:1px solid var(--line)}
.cbar span{position:absolute;inset:0 auto 0 0;background:var(--good);border-radius:99px;min-width:0}
.cbar em{position:relative;font-style:normal;font-weight:700;font-size:13px;line-height:24px;padding-left:12px;color:var(--text)}
.cstats{display:grid;grid-template-columns:repeat(3,1fr);margin:10px 0 0}
.cstats div{text-align:center;padding:12px 6px;border-left:1px solid var(--line)}
.cstats div:first-child{border-left:0}
.cstats b{display:block;font-family:"Poppins",system-ui,sans-serif;font-size:26px;font-weight:700;line-height:1.2}
.cstats span{font-size:13px;color:var(--muted)}
.cbtns{padding:14px 22px 22px;margin-top:auto}
.cbtns .btn{width:100%}

/* ===== chapters ===== */
.chapters{display:grid;gap:12px}
.chap{background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.chap[open]{border-color:var(--ink)}
.chap summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;padding:16px 18px;font-weight:700}
.chap summary::-webkit-details-marker{display:none}
.chap summary::after{content:"";width:10px;height:10px;border-right:2.5px solid var(--muted);border-bottom:2.5px solid var(--muted);transform:rotate(45deg);margin-left:6px;transition:transform .2s;flex:none}
.chap[open] summary::after{transform:rotate(225deg)}
.chap-n{flex:none;width:30px;height:30px;border-radius:50%;border:2px solid var(--print);color:var(--print);display:grid;place-items:center;font-size:14px}
.chap-t{flex:1;font-size:17px;color:var(--ink-strong)}
.chap-p{font-size:13px;color:var(--muted);font-weight:600;white-space:nowrap}
.chap-rows{border-top:1px solid var(--line)}
.crow{display:flex;align-items:center;gap:12px;padding:12px 18px;border-top:1px solid var(--line)}
.crow:first-child{border-top:0}
.crow > b,.crow > div{flex:1}
.crow > div b{display:block}
.ci{flex:none;width:34px;height:34px;border-radius:10px;background:var(--bg);display:grid;place-items:center;color:var(--ink)}
.ci svg.ic{width:18px;height:18px}
.cact{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.btn-ok{background:var(--good);color:#fff}
.badge.todo{background:var(--bad-soft);color:var(--bad)}
.badge.lockb{background:var(--bg);color:var(--muted);display:inline-flex;align-items:center}
.small{font-size:13px}
.notes h3{font-size:18px;color:var(--ink-strong);margin:18px 0 6px}
.notes h3:first-child{margin-top:4px}
.notes p{color:var(--text);margin:6px 0}
.notes ul{margin:4px 0 8px;padding-left:20px;display:grid;gap:4px;color:var(--text)}
@media (max-width:640px){
  .crow{flex-wrap:wrap}
  .cact{width:100%;justify-content:flex-start;padding-left:46px}
  .chap-p{display:none}
}
.qch{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}
.previewbox{border:1.5px dashed var(--line);border-radius:12px;padding:10px 14px;max-height:260px;overflow:auto;background:var(--bg)}

/* ===== one colour per subject page ===== */
.subpage{--sc-on:#fff;--sc-txt:var(--sc)}
.subpage.sub-computers{--sc-on:#2A2100;--sc-txt:#8A6100}
.subpage .ccard header{color:var(--sc-on)}
.subpage .btn-primary,.subpage .btn-ok{background:var(--sc);color:var(--sc-on);border-color:var(--sc)}
.subpage .btn-primary:hover,.subpage .btn-ok:hover{filter:brightness(1.08)}
.subpage .cbar span{background:var(--sc)}
.subpage .chap[open]{border-color:var(--sc)}
.subpage .chap-n{border-color:var(--sc);color:var(--sc-txt)}
.subpage .ci{color:var(--sc-txt);background:color-mix(in srgb,var(--sc) 14%,transparent)}
.subpage .sec-title{color:var(--sc-txt)}
.subpage .btn-ghost{border-color:var(--sc);color:var(--sc-txt)}
.subpage .crumbs b{color:var(--sc-txt)}
/* Computers is yellow: use dark text on it */
.tile[data-sub="computers"]{color:#2A2100}
.tile[data-sub="computers"] .tile-bubs i{border-color:rgba(42,33,0,.7)}
.tile[data-sub="computers"] .tile-bubs i.f,.tile[data-sub="computers"] .tile-bar span{background:#2A2100}
.tile[data-sub="computers"] .tile-bar{background:rgba(42,33,0,.18)}
.chip[data-s="computers"][aria-pressed="true"]{color:#2A2100}
/* pictures in questions */
.qtext,.rev-q{white-space:pre-line}
.qimg{display:block;max-width:100%;max-height:340px;width:auto;height:auto;margin:4px 0 18px;border-radius:12px;border:1px solid var(--line);background:#fff;padding:6px}
.qimg.sm{max-height:220px;margin:6px 0 10px}
.qpic{display:flex;align-items:flex-start;gap:12px;flex-wrap:wrap}
.qpic img{max-width:220px;max-height:140px;border-radius:10px;border:1px solid var(--line);background:#fff;padding:4px}
.pic-badge{display:inline-block;font-size:12px;font-weight:700;color:var(--muted);margin-left:6px}
.notes-pic{display:block;margin:6px 0 14px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.notes-pic img{display:block;width:100%;height:auto}