@font-face{font-family:Figtree;src:url(/fonts/figtree.woff2) format("woff2");font-weight:300 900;font-style:normal;font-display:swap}
:root{
  --bg:#fff;--surface:#f7f7f5;--card:#fff;--line:#e5e5e5;--line2:#d4d4d4;
  --fg:#16181d;--muted:#5f6670;
  --brand:#1f5eff;--brand-d:#1546c9;--brand-t:#eaf0ff;
  --real:#1d9a55;--real-d:#157a42;--real-t:#e6f6ec;
  --ai:#ea5a0c;--ai-d:#bf4708;--ai-t:#fff0e6;
  --bad:#e5383b;--bad-d:#b92427;
  --radius:16px;color-scheme:light
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#101318;--surface:#171b21;--card:#171b21;--line:#2a3039;--line2:#363d48;
  --fg:#f1f3f6;--muted:#9aa2ad;
  --brand:#4a7dff;--brand-d:#2f5fdc;--brand-t:#1a2440;
  --real:#2bb56a;--real-d:#1d8a4f;--real-t:#14281d;
  --ai:#ff7a33;--ai-d:#cc5a1c;--ai-t:#2e1d12;
  --bad:#ff5a5d;--bad-d:#c43c3f;color-scheme:dark
}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.55 Figtree,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;min-height:100vh;-webkit-font-smoothing:antialiased}
a{color:inherit}
::selection{background:var(--brand-t)}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:6px}
.wrap{max-width:1200px;margin:0 auto;padding:16px 32px 64px}

/* header */
header.top{display:flex;align-items:center;justify-content:space-between;padding:4px 0 28px;margin-bottom:12px;border-bottom:2px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-weight:850;font-size:22px;letter-spacing:-.03em;color:var(--fg)}
.brand img{width:30px;height:30px;display:block}
nav{display:flex;gap:4px}
nav a{color:var(--muted);text-decoration:none;font-size:15px;font-weight:700;padding:8px 12px;border-radius:10px}
nav a:hover{color:var(--fg);background:var(--surface)}

/* type */
h1{font-size:clamp(34px,6.2vw,56px);line-height:1.04;letter-spacing:-.035em;margin:20px 0 14px;font-weight:850;text-wrap:balance}
h2{font-size:22px;letter-spacing:-.02em;margin:36px 0 10px;font-weight:800}
.lede{color:var(--muted);font-size:19px;margin:0 0 24px;max-width:560px;text-wrap:pretty}
.muted{color:var(--muted)}.small{font-size:14px}

/* buttons: chunky, pressable */
.btn{--b:var(--line);--s:var(--line2);display:inline-flex;align-items:center;justify-content:center;gap:8px;border:2px solid var(--b);border-bottom-width:2px;background:var(--card);color:var(--fg);padding:12px 20px;border-radius:14px;font:inherit;font-weight:800;font-size:16px;letter-spacing:.01em;cursor:pointer;text-decoration:none;box-shadow:0 4px 0 var(--s);transition:transform .06s,box-shadow .06s,background .15s;position:relative;top:0}
.btn:hover{background:var(--surface)}
.btn:active{transform:translateY(4px);box-shadow:0 0 0 var(--s)}
.btn:disabled{opacity:.6;cursor:default;transform:none}
.btn.primary{--b:var(--brand);--s:var(--brand-d);background:var(--brand);color:#fff}
.btn.primary:hover{filter:brightness(1.06);background:var(--brand)}
.btn.big{padding:16px 28px;font-size:17px;border-radius:16px;text-transform:uppercase;letter-spacing:.04em}
.row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}

.hidden{display:none!important}


/* home */
.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:48px;align-items:center;padding:24px 0 8px}
.hero h1{margin-top:0}
.fineprint{color:var(--muted);font-size:14px;margin:18px 0 0}
.specimen{display:block;text-decoration:none;color:var(--muted)}
.specimen-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.specimen-grid i{display:block;aspect-ratio:1;border-radius:14px;background:var(--surface);overflow:hidden}
.specimen-grid img{width:100%;height:100%;object-fit:cover;display:block;opacity:0;transition:opacity .4s,transform .3s}
.specimen-grid i.in img{opacity:1}
.specimen:hover img{transform:scale(1.03)}
.specimen-cap{display:block;font-size:14px;font-weight:600;margin-top:12px}
.stat{display:flex;align-items:center;gap:18px;margin:56px 0 0;padding:28px 0;border-top:2px solid var(--line);border-bottom:2px solid var(--line);color:var(--muted);font-size:18px;line-height:1.45}
.stat-num{font-size:clamp(56px,10vw,84px);font-weight:900;letter-spacing:-.05em;line-height:.9;color:var(--fg);font-variant-numeric:tabular-nums;flex:none}
.stat-num:empty{display:none}
.stat-text{max-width:520px}
.stat-sm{margin:0 0 28px;padding:0;border:0;gap:12px;font-size:16px;align-items:center}
.stat-sm .stat-num{font-size:40px;color:var(--brand)}
.index{margin-top:48px}
.index h2{font-size:14px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 4px}
.test-list{list-style:none;margin:0;padding:0}
.test-list li{border-bottom:2px solid var(--line)}
.test-list a,.test-list li.off{display:grid;grid-template-columns:140px 1fr auto;gap:16px;align-items:baseline;padding:20px 4px;text-decoration:none}
.t-name{font-size:24px;font-weight:850;letter-spacing:-.02em}
.t-desc{color:var(--muted)}
.t-go{font-weight:800;font-size:15px;color:var(--brand)}
.test-list a .t-go::after{content:"→";display:inline-block;margin-left:6px;transition:transform .15s}
.test-list a:hover .t-go::after{transform:translateX(4px)}
.test-list a:hover .t-name{color:var(--brand)}
.test-list li.off .t-name{color:var(--muted)}
.test-list li.off .t-go{color:var(--muted);font-weight:600}

/* levels + subjects */
.block{margin-top:56px}
.sec-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:4px 24px;margin-bottom:20px}
.sec-head h2{margin:0;font-size:28px;letter-spacing:-.03em}
.sec-head p{margin:0;max-width:520px}
.ladder{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(10,1fr);position:relative}
.ladder li{position:relative;display:flex;justify-content:center}
.ladder li+li::before{content:"";position:absolute;top:27px;right:50%;width:100%;height:4px;background:var(--line);z-index:0}
.ladder li.done+li::before{background:var(--brand)}
.ladder button{all:unset;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:6px;position:relative;z-index:1;text-align:center;padding:0 2px}
.ladder button:disabled{cursor:default}
.ladder button:focus-visible .node{outline:3px solid var(--brand);outline-offset:3px}
.node{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;font-size:22px;font-weight:900;background:var(--card);border:3px solid var(--line);color:var(--muted);box-shadow:0 4px 0 var(--line);transition:transform .06s,box-shadow .06s}
.node svg{width:20px;height:20px}
.ladder li.open .node{border-color:var(--brand);color:var(--brand);box-shadow:0 4px 0 var(--brand-d)}
.ladder li.done .node{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 4px 0 var(--brand-d)}
.ladder li.locked .node{background:var(--surface);box-shadow:none}
.ladder li.sel .node{transform:scale(1.12)}
.ladder li.sel.open .node,.ladder li.sel.done .node{outline:4px solid var(--brand-t);outline-offset:2px}
.ladder button:not(:disabled):active .node{transform:translateY(4px);box-shadow:0 0 0 var(--brand-d)}
.lname{font-size:13px;font-weight:800;color:var(--fg);line-height:1.2}
.ladder li.locked .lname{color:var(--muted);font-weight:600}
.lbest{font-size:12px;color:var(--muted);font-weight:700;min-height:1em;font-variant-numeric:tabular-nums}
.level-detail{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:24px;padding:20px 0;border-top:2px solid var(--line);border-bottom:2px solid var(--line)}
.level-detail b{display:block;font-size:22px;font-weight:850;letter-spacing:-.02em}
.round-label{font-weight:800;color:var(--brand)}
.outcome{margin:14px 0 0;font-size:18px;font-weight:800}
.outcome.pass{color:var(--real)}.outcome.fail{color:var(--bad)}

/* play */
.play{display:flex;flex-direction:column;align-items:center;gap:16px;padding-top:4px}
.progress{width:min(100%,520px);display:flex;justify-content:space-between;color:var(--muted);font-size:15px;font-weight:800;font-variant-numeric:tabular-nums}
.timer{width:min(100%,520px);height:14px;background:var(--line);border-radius:999px;overflow:hidden}
.timer i{display:block;height:100%;width:100%;background:var(--brand);border-radius:999px;transform-origin:left;transition:none;box-shadow:inset 0 4px 0 -1px rgba(255,255,255,.28)}
.timer i.run{transition:transform linear;transform:scaleX(0)}
.frame{position:relative;width:min(100%,520px);aspect-ratio:1;border-radius:20px;overflow:hidden;background:var(--surface);border:2px solid var(--line);user-select:none;-webkit-user-select:none}
.frame img{width:100%;height:100%;object-fit:cover;display:block;-webkit-user-drag:none;pointer-events:none}
.fb{position:absolute;inset:auto 0 0 0;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;font-size:24px;font-weight:850;letter-spacing:-.02em;color:#fff;transform:translateY(100%);transition:transform .16s ease-out;text-align:left;padding:18px 22px}
.fb.show{transform:none}.fb.good{background:var(--real)}.fb.bad{background:var(--bad)}
.fb small{display:block;font-size:15px;font-weight:600;opacity:.92;margin-top:2px;letter-spacing:0}
.choices{display:grid;grid-template-columns:1fr 1fr;gap:14px;width:min(100%,520px)}
.choice{--c:var(--fg);--b:var(--line);--s:var(--line2);padding:20px 10px;font:inherit;font-size:24px;font-weight:850;border-radius:16px;border:2px solid var(--b);background:var(--card);color:var(--c);cursor:pointer;letter-spacing:-.01em;touch-action:manipulation;box-shadow:0 4px 0 var(--s);transition:transform .06s,box-shadow .06s,background .15s}
.choice:active{transform:translateY(4px);box-shadow:0 0 0 var(--s)}
.choice.real{--c:var(--real)}.choice.real:hover{--b:var(--real);--s:var(--real-d);background:var(--real-t)}
.choice.ai{--c:var(--ai)}.choice.ai:hover{--b:var(--ai);--s:var(--ai-d);background:var(--ai-t)}
.choice small{display:block;font-size:12px;color:var(--muted);font-weight:700;letter-spacing:.04em;margin-top:2px}

/* results */
.score-box{background:var(--card);border:2px solid var(--line);border-radius:24px;padding:32px 24px;text-align:center}
.score-big{font-size:clamp(64px,13vw,104px);font-weight:900;letter-spacing:-.05em;line-height:1;color:var(--brand)}
.score-sub{font-size:19px;margin-top:10px;font-weight:600;text-wrap:balance}.score-pct{color:var(--brand);font-weight:850}
.misses{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.miss{font-size:14px}
.miss img{width:100%;aspect-ratio:1;object-fit:cover;display:block;border-radius:12px;border-bottom:4px solid var(--c)}
.miss.ai{--c:var(--ai)}.miss.real{--c:var(--real)}
.miss .cap{padding:10px 2px 0;line-height:1.4}.miss .cap b{display:block;font-weight:800;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.miss .cap a{color:var(--muted)}
.lab{display:block;font-size:13px;font-weight:800;color:var(--c)}
.share-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px;justify-content:center}
.grid-emoji{font-size:20px;letter-spacing:2px;line-height:1.3;word-break:break-all;white-space:pre-wrap;font-family:inherit;margin:18px 0 0}
.grid-emoji:empty{display:none}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,8px);background:var(--fg);color:var(--bg);padding:11px 18px;border-radius:999px;font-weight:700;font-size:14px;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none}
.toast.show{opacity:1;transform:translate(-50%,0)}

.kpis{display:grid;grid-template-columns:repeat(3,1fr);margin:24px 0 0;border-top:2px solid var(--line);padding-top:18px}
.kpis>div+div{border-left:2px solid var(--line)}
.kpis b{display:block;font-size:28px;font-weight:850;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.kpis span{font-size:14px;color:var(--muted);font-weight:600}

/* content */
.faq{margin-top:28px;border-top:2px solid var(--line)}
.faq details{border-bottom:2px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font-weight:800;color:var(--fg);list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;line-height:1;color:var(--muted);font-weight:500}
.faq details[open] summary::after{content:"–"}
.faq p{color:var(--muted);margin:10px 0 0}
.seo{color:var(--muted);font-size:16px;max-width:680px;margin-top:56px}.seo h2{color:var(--fg)}.seo p{margin:0 0 12px}
footer{margin-top:64px;border-top:2px solid var(--line);padding-top:20px;color:var(--muted);font-size:14px}
footer a{font-weight:700}
.share .card{width:100%;height:auto;border-radius:var(--radius);border:2px solid var(--line);margin:12px 0 20px}
.spin{width:22px;height:22px;border:3px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:sp .8s linear infinite;display:inline-block}
@keyframes sp{to{transform:rotate(360deg)}}
@media (max-width:720px){.ladder{grid-template-columns:repeat(5,1fr);row-gap:20px}.ladder li:nth-child(6)::before{display:none}.node{width:50px;height:50px;font-size:19px}.ladder li+li::before{top:23px}.level-detail{flex-direction:column;align-items:stretch}.sec-head h2{font-size:24px}.wrap{padding-left:16px;padding-right:16px}.hero{grid-template-columns:1fr;gap:32px}.stat{flex-direction:column;align-items:flex-start;gap:8px}.stat-sm{flex-direction:row}.test-list a,.test-list li.off{grid-template-columns:1fr auto;gap:2px 16px}.t-desc{grid-column:1;grid-row:2;font-size:15px}.t-go{grid-row:1/3;grid-column:2;align-self:center}}
@media (max-width:480px){.kpis b{font-size:22px}.choice{padding:18px 8px;font-size:22px}.btn.big{width:100%}header.top{padding-bottom:16px}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}