:root{--ink:#172638;--green:#195f4e;--muted:#52655e;--line:#cdd7ce;--paper:#faf8f1;color:var(--ink);background:var(--paper);font:17px/1.5 "Trebuchet MS",system-ui,sans-serif}*{box-sizing:border-box}body{margin:0}header,nav,main,footer{max-width:1050px;margin:auto;padding:14px clamp(16px,4vw,48px)}header,footer,.row{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:8px;color:var(--ink);font-weight:900;letter-spacing:-.06em;font-size:29px;text-decoration:none}.brand img{width:52px;height:52px;object-fit:contain}#balance,.chip{font-size:.85rem;font-weight:bold;background:#fff0cb;padding:6px 12px;border-radius:40px}nav{display:flex;gap:5px;border-bottom:1px solid var(--line);flex-wrap:wrap}button,select,input{font:inherit}button,summary{cursor:pointer}button,a,summary,input,select{touch-action:manipulation}button{border:1px solid var(--line);border-radius:10px;background:white;color:var(--ink);padding:10px 16px;min-height:44px;font-weight:650}nav button{border:none;background:transparent;font-size:.9rem}nav button[aria-current=true]{background:#dcece2;color:#174e40}button:hover{border-color:#637a70}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #c06116;outline-offset:3px}.go{background:var(--green);border-color:var(--green);color:white}.hero{background:#dfece0;border:1px solid #cadaCB;border-radius:22px;padding:clamp(22px,5vw,54px);position:relative;overflow:hidden}.hero.art{padding-right:32%}.art img{position:absolute;right:4%;bottom:10%;width:25%;height:78%;object-fit:contain}h1,h2,h3,p{margin:0 0 .65em}h1,h2{line-height:1.12;letter-spacing:-.045em}h1{font-size:clamp(34px,6vw,65px)}h2{font-size:clamp(25px,4vw,34px);margin-top:1em}h3{font-size:1.15rem}small{font-weight:bold;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(245px,100%),1fr));gap:12px}.panel,article,main>details,.box{background:#fffefa;border:1px solid var(--line);border-radius:14px;padding:18px;margin:10px 0}.grid article{margin:0}article button,.panel button{margin-top:9px}article span,label,input,textarea,select{display:block}label{margin:14px 0;font-weight:600}input,textarea,select{padding:11px;width:100%;max-width:420px;border:1px solid #8c9c93;border-radius:8px;background:#fff;color:var(--ink)}pre{white-space:pre-wrap;font:inherit}progress{width:100%;accent-color:var(--green)}.buttons{display:flex;gap:9px;flex-wrap:wrap}.answer,.worked{background:#edf3e9;padding:14px;border-radius:8px;margin:10px 0}.section{margin:25px 0}footer{border-top:1px solid var(--line);margin-top:30px;font-size:.88rem}footer details{max-width:420px}a{color:var(--green)}.step{color:var(--muted);font-weight:650}.score{font-size:2.2rem;font-weight:800}summary{padding:4px 0}button[disabled]{opacity:.55;cursor:default}@media(max-width:560px){.hero.art{padding:22px}.art img{position:static;float:right;width:72px;height:76px}.art p{clear:both}nav{gap:0}nav button{padding:7px 10px}.hero button{width:100%}header,nav{padding-top:8px;padding-bottom:8px}}
