:root{
  --bg:#f5f6f8; --paper:#fff; --ink:#151922; --muted:#626b78; --line:#d9dee7;
  --brand:#263a63; --brand2:#385487; --soft:#eef2f8; --good:#157347; --bad:#b42318;
  --warn:#9a6700; --shadow:0 14px 34px rgba(17,24,39,.08); --radius:16px;
}
*{box-sizing:border-box} html{background:var(--bg)} body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.45}
button,input{font:inherit} button{cursor:pointer}.shell{min-height:100vh}.topbar{background:#111827;color:#fff;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:18px;position:sticky;top:0;z-index:20;box-shadow:0 2px 12px rgba(0,0,0,.12)}
.brand{display:flex;align-items:center;gap:12px;font-weight:750;letter-spacing:.01em}.brand-mark{width:32px;height:32px;border-radius:9px;background:#fff;color:#111827;display:grid;place-items:center;font-size:13px;font-weight:900}.top-actions{display:flex;gap:8px;flex-wrap:wrap}.topbar button{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35);border-radius:9px;padding:8px 11px}.topbar button:hover{background:rgba(255,255,255,.09)}
.container{max-width:1180px;margin:0 auto;padding:28px 20px 60px}.hero{background:linear-gradient(135deg,#fff,#eef2f8);border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--shadow);margin-bottom:24px}.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:12px;font-weight:800;color:var(--brand2)}h1{font-size:clamp(30px,5vw,50px);line-height:1.05;margin:8px 0 12px}h2{margin:0 0 8px;font-size:25px}h3{margin:0 0 8px}.lead{font-size:18px;color:#3f4754;max-width:850px}.note{color:var(--muted);font-size:14px}.pill{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:6px 10px;background:var(--soft);color:var(--brand);font-weight:700;font-size:13px}.pill.good{background:#e9f7ef;color:var(--good)}.pill.bad{background:#feeeee;color:var(--bad)}.pill.warn{background:#fff4d8;color:var(--warn)}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.area-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 6px 18px rgba(17,24,39,.04)}.area-card-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}.area-card p{color:var(--muted)}.progressbar{height:9px;background:#edf0f4;border-radius:99px;overflow:hidden;margin:12px 0}.progressbar>div{height:100%;background:var(--brand2);border-radius:99px}.level-strip{display:grid;grid-template-columns:repeat(7,1fr);gap:7px;margin-top:14px}.level-btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 4px;text-align:center;font-weight:750;color:var(--brand)}.level-btn:hover:not(:disabled){border-color:var(--brand2);background:var(--soft)}.level-btn.done{background:#edf8f1;border-color:#b8dfc8;color:var(--good)}.level-btn.active{background:#eef2f8;border-color:#aab8cf}.level-btn:disabled{color:#9ca3af;background:#f5f6f8;cursor:not-allowed}.level-label{display:block;font-size:10px;color:var(--muted);font-weight:600;margin-top:2px}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:28px 0 12px}.btn{border:1px solid var(--brand);background:var(--brand);color:#fff;border-radius:10px;padding:10px 14px;font-weight:750}.btn:hover{filter:brightness(1.05)}.btn.secondary{background:#fff;color:var(--brand);border-color:var(--line)}.btn.danger{background:#fff;color:var(--bad);border-color:#efb4ae}.btn.small{padding:7px 10px;font-size:13px}.btn:disabled{opacity:.45;cursor:not-allowed}.stack{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.exam-shell{max-width:1280px;margin:0 auto;padding:0 18px 40px}.exam-meta{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:16px;padding:16px 2px}.exam-meta h2{font-size:18px}.timer{font-variant-numeric:tabular-nums;font-weight:800}.exam-grid{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:18px}.question-card{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}.question-head{padding:15px 20px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:15px;background:#fafbfc}.question-body{padding:24px}.stimulus{margin-bottom:22px}.stimulus-caption{font-weight:650;margin:0 0 8px}.stimulus-note{background:#f7f8fa;border-left:4px solid #9aa8be;padding:10px 12px;margin:12px 0;font-size:14px}.data-table{width:100%;border-collapse:collapse;font-size:15px;background:#fff}.data-table th,.data-table td{border:1px solid #cfd5de;padding:9px 10px;text-align:right}.data-table th:first-child,.data-table td:first-child{text-align:left}.data-table th{background:#f0f3f7;font-weight:750}.prompt{font-size:18px;font-weight:650;margin:4px 0 18px}.options{display:grid;gap:10px}.option{display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:center;border:1px solid var(--line);border-radius:11px;padding:11px 13px;background:#fff;text-align:left;color:var(--ink)}.option:hover{border-color:#8fa0bc;background:#fafcff}.option.selected{border-color:var(--brand2);background:#edf2fa;box-shadow:0 0 0 2px rgba(56,84,135,.08)}.letter{width:28px;height:28px;display:grid;place-items:center;border-radius:7px;background:#eef1f5;font-weight:800;color:var(--brand)}.option.selected .letter{background:var(--brand2);color:#fff}.question-actions{padding:15px 20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;background:#fafbfc}.nav-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:15px;height:max-content;position:sticky;top:78px}.nav-card h3{font-size:15px}.navigator{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin-top:12px}.nav-q{height:37px;border:1px solid var(--line);background:#fff;border-radius:8px;font-weight:750;position:relative}.nav-q.current{outline:2px solid var(--brand2)}.nav-q.answered{background:#eaf1fb;border-color:#b4c4dd}.nav-q.flagged:after{content:"";width:7px;height:7px;background:#d97706;border-radius:50%;position:absolute;right:4px;top:4px}.nav-help{font-size:12px;color:var(--muted);margin-top:12px}.flag-btn{border:1px solid var(--line);border-radius:8px;padding:7px 10px;background:#fff;color:#5d6570}.flag-btn.on{border-color:#e1a84a;background:#fff6e7;color:#8b5d08}
.calculator{position:fixed;right:22px;bottom:22px;width:286px;background:#20242c;border:1px solid #3b414b;border-radius:14px;padding:12px;box-shadow:0 18px 50px rgba(0,0,0,.28);z-index:50}.calc-display{width:100%;background:#e8ebef;color:#111;padding:13px;border:0;border-radius:7px;font-size:21px;text-align:right;font-variant-numeric:tabular-nums;margin-bottom:9px}.calc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.calc-grid button{height:43px;border:0;border-radius:7px;background:#f4f5f7;font-weight:750}.calc-grid button.op{background:#cdd5e1}.calc-grid button.eq{background:#7ea3d8;color:#101827}.calc-close{position:absolute;right:10px;top:-34px;border:0;background:#20242c;color:#fff;border-radius:8px 8px 0 0;padding:6px 9px}
.result-hero{background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:var(--shadow);text-align:center}.score-ring{width:130px;height:130px;border-radius:50%;margin:14px auto;display:grid;place-items:center;background:conic-gradient(var(--brand2) var(--score),#e7ebf0 0);position:relative}.score-ring:before{content:"";position:absolute;inset:10px;background:#fff;border-radius:50%}.score-ring strong{position:relative;font-size:30px}.review-list{display:grid;gap:12px;margin-top:20px}.review-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}.review-item.wrong{border-left:5px solid var(--bad)}.review-item.correct{border-left:5px solid var(--good)}.review-top{display:flex;justify-content:space-between;gap:12px}.review-prompt{font-weight:700}.answer-row{margin-top:8px;font-size:14px}.explanation{margin-top:10px;padding:10px 12px;background:#f7f8fa;border-radius:8px;color:#343b46}
.dashboard-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:17px}.stat strong{font-size:28px;display:block}.progress-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}.progress-table th,.progress-table td{padding:10px 11px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}.progress-table th{background:#f3f5f8}.progress-table tr:last-child td{border-bottom:0}.history{display:grid;gap:9px}.history-row{background:#fff;border:1px solid var(--line);border-radius:10px;padding:11px 13px;display:flex;justify-content:space-between;gap:14px}.empty{padding:24px;background:#fff;border:1px dashed #c7ced9;border-radius:12px;color:var(--muted);text-align:center}.footer{max-width:1180px;margin:0 auto;padding:0 20px 35px;color:var(--muted);font-size:12px}.kbd{border:1px solid #c9ced6;border-bottom-width:2px;border-radius:5px;padding:1px 5px;background:#fff;color:#3d4653;font-size:11px}.hidden{display:none!important}
@media(max-width:850px){.grid{grid-template-columns:1fr}.exam-grid{grid-template-columns:1fr}.nav-card{position:static}.level-strip{grid-template-columns:repeat(4,1fr)}.dashboard-grid{grid-template-columns:1fr}.exam-meta{grid-template-columns:1fr auto}.exam-meta .stack{grid-column:1/-1}.topbar{position:static}.navigator{grid-template-columns:repeat(10,1fr)}}
@media(max-width:560px){.container{padding:18px 12px 45px}.hero{padding:20px}.question-body{padding:17px}.question-actions{flex-wrap:wrap}.navigator{grid-template-columns:repeat(5,1fr)}.topbar{padding:12px}.brand span:last-child{display:none}.exam-shell{padding:0 10px 30px}.data-table{font-size:13px}.data-table th,.data-table td{padding:7px}.prompt{font-size:17px}}

/* Animal reward system */
.top-badge{display:inline-grid;place-items:center;min-width:18px;height:18px;padding:0 5px;margin-left:4px;border-radius:999px;background:#f59e0b;color:#111827;font-size:11px;font-weight:900}
.reward-pill{background:#fff0c7;color:#7a4d00}.reward-btn{background:#7c3aed;border-color:#7c3aed}.reward-btn:hover{filter:brightness(1.08)}
.level-btn{min-height:82px}.level-animal{display:block;font-size:22px;line-height:1.1}.level-number{display:block;font-size:11px;margin-top:4px;color:inherit}
.animal-teaser{background:linear-gradient(135deg,#fffaf0,#f7f0ff);border:1px solid #e8d9c4;border-radius:20px;padding:20px;box-shadow:0 7px 20px rgba(93,64,36,.06);margin:0 0 22px}.animal-teaser-head{display:flex;justify-content:space-between;align-items:flex-start;gap:18px}.animal-teaser-head p{max-width:720px;margin-bottom:0}.companion-strip{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;margin-top:18px}.companion-mini{border:1px solid #e3d9cb;background:rgba(255,255,255,.82);border-radius:13px;padding:10px 6px;text-align:center;color:var(--ink);min-width:0}.companion-mini:not(.locked):hover{transform:translateY(-1px);box-shadow:0 5px 14px rgba(51,36,20,.08)}.companion-mini-emoji{display:block;font-size:31px;line-height:1.1}.companion-mini strong,.companion-mini small{display:block}.companion-mini strong{font-size:13px;margin-top:5px}.companion-mini small{font-size:10px;color:var(--muted);margin-top:2px}.companion-mini.locked{opacity:.55;cursor:default}
.animal-hero{display:flex;justify-content:space-between;align-items:center;gap:24px}.reward-total{min-width:135px;text-align:center;background:rgba(255,255,255,.72);border:1px solid var(--line);border-radius:18px;padding:18px}.reward-total strong{display:block;font-size:38px}.reward-total span{font-size:12px;color:var(--muted);font-weight:700}.animal-grid{display:grid;gap:18px}.animal-card{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:22px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 7px 20px rgba(17,24,39,.05)}.animal-card-copy p{color:var(--muted);max-width:700px}.animal-title-emoji{font-size:.9em}.locked-animal{display:block;min-height:170px;text-align:center;background:#eef0f3;color:#7b8491;border-style:dashed}.locked-animal-mark{font-size:38px;margin:8px 0}.owned-items{display:flex;gap:8px;flex-wrap:wrap;margin-top:15px}.owned-chip{display:inline-flex;align-items:center;gap:7px;padding:7px 10px;border-radius:999px;background:#f6f2ff;border:1px solid #ddd0f7;font-size:12px;font-weight:700}.owned-chip span{font-size:18px}.empty-animal-home{margin-top:14px;padding:12px;border-radius:10px;background:#f7f8fa;color:var(--muted);font-size:13px}.reward-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.animal-scene{height:235px;position:relative;overflow:hidden;border-radius:20px;border:1px solid rgba(0,0,0,.08);isolation:isolate}.animal-scene:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.22),transparent 55%);z-index:-1}.animal-ground{position:absolute;left:-5%;right:-5%;bottom:-22px;height:43%;border-radius:50% 50% 0 0;background:rgba(83,128,67,.34);z-index:-1}.animal-level-1{background:linear-gradient(#dff4ff 0 57%,#dcf0c8 57%)}.animal-level-2{background:linear-gradient(#d6ecff 0 53%,#cadf9a 53%)}.animal-level-3{background:linear-gradient(#e4effd 0 55%,#d7c8a4 55%)}.animal-level-4{background:linear-gradient(#ffe7c6 0 55%,#d9e9af 55%)}.animal-level-5{background:linear-gradient(#dce8d5 0 56%,#b8a47a 56%)}.animal-level-6{background:linear-gradient(#cceeff 0 47%,#72c8e6 47% 73%,#b4d39a 73%)}.animal-level-7{background:linear-gradient(#efe7ff 0 55%,#b9d7a5 55%)}.animal-emoji{position:absolute;left:50%;bottom:32px;transform:translateX(-50%);font-size:92px;filter:drop-shadow(0 8px 5px rgba(0,0,0,.12));z-index:2}.scene-item{position:absolute;display:grid;place-items:center;width:55px;height:55px;border-radius:50%;background:rgba(255,255,255,.76);border:1px solid rgba(255,255,255,.92);font-size:31px;box-shadow:0 5px 14px rgba(17,24,39,.13);z-index:3}.scene-item-1{left:7%;bottom:20px}.scene-item-2{right:7%;bottom:22px}.scene-item-3{left:10%;top:22px}.scene-item-4{right:10%;top:23px}.scene-item-5{left:50%;top:12px;transform:translateX(-50%)}.animal-scene.compact{height:165px}.animal-scene.compact .animal-emoji{font-size:68px;bottom:21px}.animal-scene.compact .scene-item{width:42px;height:42px;font-size:23px}
.shop-layout{display:grid;grid-template-columns:380px minmax(0,1fr);gap:24px;align-items:start}.shop-intro{position:sticky;top:82px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:var(--shadow)}.shop-intro h1{font-size:34px}.shop-intro .lead{font-size:16px}.shop-intro .animal-scene{margin:18px 0}.shop-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.shop-item{display:grid;grid-template-columns:64px 1fr;grid-template-rows:auto auto auto;column-gap:12px;align-items:center;border:1px solid var(--line);border-radius:15px;background:#fff;padding:14px;text-align:left;color:var(--ink);min-height:105px;box-shadow:0 4px 12px rgba(17,24,39,.04)}.shop-item:hover:not(:disabled){border-color:#8b5cf6;background:#fbf9ff;transform:translateY(-1px)}.shop-item.owned{opacity:.5;background:#f4f5f7;cursor:not-allowed}.shop-emoji{grid-row:1/4;font-size:46px;text-align:center}.shop-category{font-size:10px;letter-spacing:.1em;text-transform:uppercase;font-weight:800;color:#7c3aed}.shop-item strong{font-size:15px}.shop-choose{font-size:11px;color:var(--muted);font-weight:700}.reward-celebration{max-width:760px;margin:30px auto;background:linear-gradient(135deg,#fff9e9,#f4efff);border:1px solid #e7d9ba;border-radius:26px;padding:34px;text-align:center;box-shadow:var(--shadow)}.reward-celebration h1{font-size:clamp(30px,5vw,46px)}.reward-celebration .animal-scene{max-width:520px;margin:20px auto}.celebration-sparkles{font-size:28px;letter-spacing:6px;margin-bottom:10px}.big-reward-chip{display:inline-flex;align-items:center;gap:13px;background:#fff;border:1px solid #dfd3ef;border-radius:16px;padding:10px 16px;text-align:left}.big-reward-chip>span{font-size:38px}.big-reward-chip small,.big-reward-chip strong{display:block}.big-reward-chip small{text-transform:uppercase;font-size:9px;letter-spacing:.1em;color:#7c3aed;font-weight:800}.result-reward{display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;margin-top:18px;padding:18px 22px;background:linear-gradient(135deg,#fff5d7,#f4efff);border:1px solid #e7d4a8;border-radius:18px}.result-reward.collected{background:#f6f8fb;border-color:var(--line)}.result-reward h2{font-size:21px}.result-reward p{margin:5px 0;color:var(--muted)}.result-reward-animal{font-size:55px}.table-scroll{overflow-x:auto}.dashboard-module-grid{display:grid;gap:16px}.dashboard-area{padding:16px}.dashboard-grid.four{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.animal-card{grid-template-columns:1fr}.animal-card .animal-scene{max-width:520px;width:100%;justify-self:center}.shop-layout{grid-template-columns:1fr}.shop-intro{position:static}.shop-intro .animal-scene{max-width:520px;margin-left:auto;margin-right:auto}.companion-strip{grid-template-columns:repeat(4,1fr)}.dashboard-grid.four{grid-template-columns:repeat(2,1fr)}}
@media(max-width:700px){.animal-teaser-head,.animal-hero{display:block}.animal-teaser-head .stack{margin-top:14px}.reward-total{margin-top:18px}.shop-grid{grid-template-columns:1fr}.result-reward{grid-template-columns:auto 1fr}.result-reward .btn{grid-column:1/-1}.companion-strip{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.animal-card{padding:15px}.animal-scene{height:195px}.animal-emoji{font-size:76px}.scene-item{width:45px;height:45px;font-size:25px}.dashboard-grid.four{grid-template-columns:1fr 1fr}.animal-teaser{padding:15px}.shop-intro{padding:17px}.reward-celebration{padding:22px 15px}}