:root{
  --paper:#f4f6fb; --sheet:#ffffff; --grid:#e6ebf5; --line:#d5dcea;
  --ink:#1b2a4e; --muted:#56637f; --pen:#0d7652; --red:#c22f39; --red-soft:#fbe6e7;
  --btn:#2f5bea; --btn-ink:#ffffff;
  --c1:#2f5bea; --c2:#e64980; --c3:#f76707; --c4:#0ca678; --c5:#7048e8; --c6:#1098ad; --hc:#a61e4d; --gc:#6741d9;
  --t1:#dbe4ff; --t2:#ffdeeb; --t3:#ffe8cc; --t4:#c3fae8; --t5:#e5dbff;
  --f-display:"Bricolage Grotesque","Trebuchet MS",system-ui,sans-serif;
  --f-body:"Atkinson Hyperlegible",Verdana,system-ui,sans-serif;
}
@media (prefers-color-scheme: dark){
  :root{--paper:#0f1628; --sheet:#162038; --grid:#1a2541; --line:#2b3a5d; --ink:#e6ebf6; --muted:#9ca8c5; --pen:#45d29f; --red:#ff7179; --red-soft:#3b1b24;
    --btn:#6d93ff; --btn-ink:#0f1628; --c1:#6d93ff; --c2:#f783ac; --c3:#ff922b; --c4:#38d9a9; --c5:#9775fa; --c6:#3bc9db; --hc:#c2255c; --gc:#7c5ce6;
    --t1:#24345e; --t2:#4a2236; --t3:#4a3216; --t4:#163f35; --t5:#2e2552; color-scheme:dark}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;min-height:100vh;background-color:var(--paper);color:var(--ink);font:400 17px/1.55 var(--f-body);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px}
a{color:var(--c1)}
h1,h2,h3{font-family:var(--f-display);line-height:1.1;letter-spacing:-.01em;margin:0 0 .4em}
h1{font-size:clamp(34px,7vw,56px);font-weight:800}
h2{font-size:clamp(24px,4.4vw,34px);font-weight:800}
h3{font-size:20px;font-weight:700}
p{margin:0 0 .8em}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
.narrow{max-width:460px}
header.top{position:sticky;top:0;z-index:5;background:var(--paper);background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:12px;height:62px}
.brand{display:flex;align-items:center;gap:10px;font:800 22px var(--f-display);color:var(--ink);text-decoration:none}
.logo{display:grid;grid-template-columns:1fr 1fr;gap:3px;width:26px;height:26px}
.logo i{border-radius:4px}.logo i:nth-child(1){background:var(--c1)}.logo i:nth-child(2){background:#fcc419}.logo i:nth-child(3){background:var(--c2)}.logo i:nth-child(4){background:var(--c4)}
.nav{display:flex;gap:8px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 20px;border-radius:12px;border:2px solid var(--btn);background:var(--btn);color:var(--btn-ink);font:700 17px var(--f-body);text-decoration:none;cursor:pointer}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.small{min-height:40px;padding:0 14px;font-size:15px}
.btn.danger{background:transparent;color:var(--red);border-color:var(--red)}
.btn:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #fcc419;outline-offset:2px}
.btn[disabled]{opacity:.6;cursor:default}
.sheet{background:var(--sheet);border:1px solid var(--line);border-radius:18px;padding:22px 20px;box-shadow:0 1px 0 var(--line)}
.hero{padding:44px 0 26px}
.eyebrow{font:700 13px var(--f-body);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.lede{font-size:clamp(18px,2.6vw,21px);color:var(--muted);max-width:640px}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 8px}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.level{border-top:6px solid var(--lc,var(--c1))}
.level .age{color:var(--muted);font-size:15px}
.stat{font:800 40px/1 var(--f-display);color:var(--lc,var(--c1));margin-bottom:6px}
section{margin:26px 0}
.list{margin:0;padding-left:20px}.list li{margin:6px 0}
.tag{display:inline-block;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:3px 8px;border-radius:999px;background:var(--t4);color:var(--ink)}
.price{font:800 36px var(--f-display)}
footer{border-top:1px solid var(--line);margin-top:40px;padding:24px 0 40px;color:var(--muted);font-size:15px}
footer a{color:var(--muted)}
/* forms */
form .field{margin:0 0 14px}
label{display:block;font-weight:700;margin-bottom:6px}
input[type=text],input[type=email],input[type=password],input[type=date],select{width:100%;min-height:50px;padding:10px 12px;border:2px solid var(--line);border-radius:12px;background:var(--sheet);color:var(--ink);font:400 17px var(--f-body)}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400}
.check input{width:22px;height:22px;margin-top:2px;flex:none}
.err{display:none;background:var(--red-soft);color:var(--red);border-radius:10px;padding:10px 12px;margin:0 0 14px;font-weight:700}
.err.show{display:block}
.ok{display:none;background:var(--t4);border-radius:10px;padding:10px 12px;margin:0 0 14px;font-weight:700}
.ok.show{display:block}
.small{font-size:15px;color:var(--muted)}
.center{text-align:center}
/* account */
.learners{display:grid;gap:12px}
.learner{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.avatar{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font:800 24px var(--f-display);color:#fff;background:var(--ac,var(--c1));flex:none}
.learner .who{flex:1;min-width:140px}
.learner .who b{display:block;font-size:19px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.row .field{flex:1;min-width:160px}
details{border-top:1px solid var(--line);padding:14px 0}
details summary{cursor:pointer;font-weight:700}
.prose h2{margin-top:1.2em;font-size:24px}
.prose{max-width:720px}

/* Install the app */
.install{display:flex;flex-direction:column;gap:12px}
.install-row{display:flex;gap:14px;align-items:center}
.install-row img{flex:none;border-radius:14px}
.install h3{margin:0 0 2px}
.install p{margin:0}
.install .share{display:inline-block;width:1.1em;height:1.1em;vertical-align:-.2em;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.standalone .hide-in-app{display:none}
/* Buttons keep their own text colour when they also use the "small" size */
.btn.small{color:var(--btn-ink)}
.btn.ghost.small{color:var(--ink)}
.btn.danger.small{color:var(--red)}

/* Plans and the paywall */
.mods{display:grid;gap:10px;margin:14px 0}
.mod{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;border:1.5px solid var(--line);border-radius:14px;padding:14px 16px;background:var(--sheet)}
.mod.on{border-color:var(--c4)}
.mod.all{border-width:2px;border-color:var(--c1)}
.mod.all.on{border-color:var(--c4)}
.mod-h{display:flex;flex-direction:column;gap:2px;min-width:200px;flex:1}
.mod-h b{font-size:17px}
.mod-s{font-size:14px;font-weight:700;color:var(--muted)}
.mod.on .mod-s{color:var(--c4)}
.mod-b{display:flex;gap:8px;flex-wrap:wrap}
.lock{font-size:13px;font-weight:700;color:var(--muted);border:1.5px solid var(--line);border-radius:999px;padding:3px 10px}
#lockmsg.show{display:block}
/* English */
.btn.en{background:#b4235a;border-color:#b4235a;color:#fff}
.modsub{font:800 15px/1.2 var(--f-display,inherit);text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:14px 0 2px}
.modsub:first-child{margin-top:0}
.concern{border:2px solid var(--c3);background:var(--t3,#fff4e6)}
.concern p{margin:6px 0 0}

/* parent dashboard */
.learner{flex-wrap:wrap}
.dash{flex-basis:100%;display:flex;flex-direction:column;gap:10px;margin:6px 0 0;padding-top:12px;border-top:1px solid var(--line)}
p.dash{margin:6px 0 0}
.drow{display:flex;flex-direction:column;gap:6px}
.dhead{display:flex;flex-wrap:wrap;gap:4px 10px;align-items:baseline}
.dstats{display:flex;flex-wrap:wrap;gap:6px}
.dstats span{background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:4px 10px;font-size:14px}
.dest{font-size:15px}
.dchip{display:inline-block;margin-right:8px}
.dchip b{color:var(--c4)}
.toggle{display:flex;gap:10px;align-items:flex-start;margin:14px 0;cursor:pointer}
.toggle input{width:20px;height:20px;margin-top:3px}
.toggle,.toggle .small{font-weight:400}.toggle b{font-weight:700}

.dhard{font-size:15px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.dhard > b{color:var(--red)}
.hchip{background:var(--red-soft,#fbe6e7);border:1px solid var(--red,#c22f39);color:var(--ink);border-radius:999px;padding:3px 10px;font-size:14px}
.hchip small{color:var(--muted)}
.share{flex-basis:100%;border-top:1px solid var(--line);padding-top:10px;margin-top:4px}
.share summary{cursor:pointer;font-weight:700}
.share > p.small{margin:8px 0}
.shrow{display:flex;flex-wrap:wrap;gap:8px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:8px 12px;margin:8px 0}
.shrow > div{flex:1 1 200px;display:flex;flex-direction:column}
.shareform{margin-top:10px}

.shrow .stw{color:#9a6400}.shrow .sta{color:#1d7a46}.shrow .std{color:#c22f39}
/* plans: one section per stage, single subjects then the cheaper bundle */
details.stage{border:1.5px solid var(--line);border-radius:16px;padding:4px 14px;margin:0 0 10px;background:var(--sheet)}
details.stage>summary{display:flex;align-items:baseline;justify-content:space-between;gap:10px;flex-wrap:wrap;cursor:pointer;padding:10px 0;font-size:18px;list-style-position:inside}
details.stage>summary b{font:800 19px/1.2 var(--f-display,inherit)}
details.stage[open]>summary{border-bottom:1px solid var(--line);margin-bottom:8px}
details.stage .mods{margin:8px 0 12px}
.mod.bundle{border-width:2px;border-color:var(--c1)}
.mod.bundle.on{border-color:var(--c4)}
.save{display:inline-block;margin-left:8px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:3px 8px;border-radius:999px;background:var(--t4);color:var(--ink);vertical-align:middle}
.mod s{color:var(--muted)}
.disc{color:var(--c4)}
.mod-b .up{flex-basis:100%;max-width:340px}
.codebar{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;border:2px dashed var(--c4);border-radius:14px;padding:10px 14px;margin:12px 0;font-weight:700}
.codeform{margin-top:14px}
.ptab{width:100%;border-collapse:collapse;margin:6px 0}
.ptab th,.ptab td{text-align:left;padding:8px 0;border-bottom:1px solid var(--line);vertical-align:top;font-weight:400}
.ptab th{font-weight:700;padding-right:8px}
.ptab td{text-align:right;white-space:nowrap}
.ptab tr.bun th,.ptab tr.bun td b{color:var(--c1)}
.ptab tr:last-child th,.ptab tr:last-child td{border-bottom:0}
.iapbar{margin:6px 0 10px;flex-wrap:wrap}
#iap .small a{color:inherit}
.btnrow{display:flex;gap:8px;flex-wrap:wrap}

/* Amazon Appstore app: no sign-up links (see pwa.js) */
.in-amazon .hide-amazon{display:none!important}

/* UK section on the home page */
.ukbox{border:2px solid var(--c1)}.uklist{margin:0 0 10px;padding-left:20px}.uklist li{margin:6px 0;line-height:1.45}

/* parent dashboard: completion by area (green = completed, amber = 50–99%, red = below 50%) */
.dcmp{margin-top:8px}.dcmp summary{cursor:pointer;display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center}
.dkeys{display:inline-flex;gap:3px}.dcmp .k{display:inline-block;width:10px;height:10px;border-radius:3px}
.dcmp ul{list-style:none;margin:8px 0;padding:0;display:flex;flex-direction:column;gap:6px}
.dcmp li{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(60px,1fr) auto;gap:8px;align-items:center;font-size:14px}
.dcmp .db{height:10px;border-radius:999px;background:rgba(127,140,170,.25);overflow:hidden}.dcmp .db i{display:block;height:100%}
.dcmp .r-g i,.dcmp .k.r-g{background:#2b8a3e}.dcmp .r-a i,.dcmp .k.r-a{background:#f08c00}.dcmp .r-r i,.dcmp .k.r-r{background:#e03131}
.dcmp li.r-g b{color:#2f9e44}.dcmp li.r-a b{color:#d9730d}.dcmp li.r-r b{color:#e03131}

/* parent zone: minutes spent answering questions each day */
.dact{margin-top:10px;padding:10px 12px;border:1px solid rgba(127,140,170,.3);border-radius:12px}
.dacth{display:flex;flex-wrap:wrap;gap:4px 12px;align-items:baseline;justify-content:space-between}
.dactsw{display:inline-flex;gap:4px}.dactsw button{font:inherit;font-size:13px;padding:3px 9px;border-radius:999px;border:1px solid rgba(127,140,170,.45);background:transparent;color:inherit;cursor:pointer}.dactsw button.on{background:#2f5bea;border-color:#2f5bea;color:#fff}
.dbars{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;align-items:end;height:130px;margin-top:10px}.dbars.d14{grid-template-columns:repeat(14,minmax(0,1fr));gap:3px}
.dbar{display:flex;flex-direction:column;align-items:center;height:100%;min-width:0}.dcol{flex:1;width:100%;max-width:34px;display:flex;flex-direction:column-reverse;border-radius:6px 6px 0 0;background:rgba(127,140,170,.12);overflow:hidden}
.dcol i{display:block;width:100%}.dm{background:#2f5bea}.de{background:#e8590c}
.dv{font-size:12px;font-weight:700;min-height:16px}.dl{font-size:12px;margin-top:3px;opacity:.8}.dbar.now .dl{font-weight:800;opacity:1}
.dkey2 i{display:inline-block;width:10px;height:10px;border-radius:2px;margin:0 3px 0 0;vertical-align:-1px}.dkey2 i.de{margin-left:8px}

/* logo: three squares and a plus (chosen brand mark, concept 1) */
.logo i:nth-child(4){background:none!important;position:relative}
.logo i:nth-child(4)::before,.logo i:nth-child(4)::after{content:"";position:absolute;background:#0ca678;border-radius:2px}
.logo i:nth-child(4)::before{left:36%;width:28%;top:0;bottom:0}
.logo i:nth-child(4)::after{top:36%;height:28%;left:0;right:0}