:root{--ink:#12323a;--deep:#092f35;--paper:#fbf9f4;--mist:#e5efec;--line:#c8d9d4;--accent:#d46f43;--gold:#e3b55a;--good:#1c735a;--bad:#a33d3d;--shadow:0 18px 55px #06282c18}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 90% 0,#dbece8 0,transparent 32rem),var(--paper);color:var(--ink);font:16px/1.55 ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.shell{max-width:860px;margin:auto;padding:28px 18px 72px}.brand{display:flex;align-items:center;gap:14px;margin-bottom:36px}.mark{width:43px;height:43px;border-radius:13px;background:var(--deep);color:var(--gold);display:grid;place-items:center;font:700 25px Georgia,serif}.eyebrow{margin:0;color:#55706e;font-size:.73rem;letter-spacing:.13em;text-transform:uppercase;font-weight:700}.brand h1{font:600 1.18rem/1.1 Georgia,serif;margin:3px 0 0}.hero,.card{background:#fffdf9;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:22px;padding:clamp(22px,5vw,46px)}.hero h2{font:600 clamp(2rem,6vw,4rem)/1.04 Georgia,serif;letter-spacing:-.04em;margin:10px 0 16px;max-width:12ch}.hero p{max-width:58ch;color:#45605f}.grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;margin-top:22px}.field,label{display:block;font-size:.86rem;font-weight:700;color:#315454}.field input,.select{width:100%;margin-top:7px;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;font:inherit;color:var(--ink)}.choices{display:flex;flex-wrap:wrap;gap:8px;margin-top:7px}.chip{border:1px solid var(--line);background:#fff;padding:9px 12px;border-radius:999px;cursor:pointer;color:var(--ink);font:inherit}.chip.active{background:var(--deep);color:#fff;border-color:var(--deep)}button.primary{border:0;border-radius:12px;padding:14px 20px;background:var(--accent);color:white;font-weight:800;font-size:1rem;cursor:pointer;margin-top:27px}button.primary:hover{filter:brightness(.94)}.note{font-size:.82rem;color:#617876;margin-top:14px}.topline{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:24px}.back{border:0;background:none;color:#3a6665;font:inherit;cursor:pointer;padding:0}.progress{height:7px;border-radius:99px;background:var(--mist);overflow:hidden;margin:12px 0 30px}.progress i{display:block;height:100%;background:var(--accent);border-radius:99px}.case{display:inline-block;color:#89611c;background:#fff2ce;border-radius:999px;padding:5px 10px;font-size:.78rem;font-weight:800;margin-bottom:18px}.question{font:500 clamp(1.3rem,3.3vw,2rem)/1.28 Georgia,serif;margin:0 0 24px}.option{display:flex;gap:13px;align-items:flex-start;width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:14px;padding:15px;margin:10px 0;cursor:pointer;font:inherit;color:var(--ink)}.option:hover,.option.selected{border-color:#5c9790;background:#f1f8f6}.letter{flex:0 0 29px;height:29px;border:1px solid #aac8c2;border-radius:50%;display:grid;place-items:center;color:#3c6967;font-size:.8rem;font-weight:800}.option.correct{border-color:var(--good);background:#e9f5ef}.option.wrong{border-color:var(--bad);background:#fcede9}.answer{width:100%;min-height:150px;border:1px solid var(--line);border-radius:14px;padding:13px;font:inherit}.feedback{border-top:1px solid var(--line);margin-top:25px;padding-top:22px}.feedback h3{margin:0 0 6px;font:600 1.35rem Georgia,serif}.good{color:var(--good)}.sources{font-size:.86rem;margin-top:15px}.sources a{color:#2d6766}.actions{display:flex;gap:10px;justify-content:space-between;margin-top:28px}.secondary{border:1px solid var(--line);background:#fff;border-radius:11px;padding:12px 15px;font:inherit;cursor:pointer}.summary-number{font:600 4rem/1 Georgia,serif;color:var(--accent);margin:10px 0}.hidden{display:none}@media(max-width:620px){.shell{padding:18px 13px 48px}.hero,.card{border-radius:17px;padding:24px 19px}.grid{grid-template-columns:1fr}.hero h2{font-size:2.45rem}.actions{flex-wrap:wrap}.actions button{flex:1}}