:root{--ink:#13263d;--muted:#64748b;--paper:#f8f5ed;--card:#fffdf9;--line:#d9e0e7;--blue:#1677d2;--blue2:#0d5ea9;--good:#16764b;--bad:#b53a38;--shadow:0 18px 45px rgba(17,39,61,.12)}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 15% 0,#d5eaff,transparent 27rem),var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}.shell{max-width:860px;margin:auto;padding:28px 18px 54px}header{display:flex;align-items:end;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 0 18px;margin-bottom:28px}.brand{font-weight:800;letter-spacing:.035em;color:var(--ink);text-decoration:none;font-size:14px}.brand span{color:var(--blue)}.eyebrow{margin:0;color:var(--muted);font-size:11px;font-weight:800;letter-spacing:.12em}.card{background:var(--card);border:1px solid #e5e8e8;border-radius:20px;padding:clamp(23px,5vw,44px);box-shadow:var(--shadow)}.kicker,.counter{color:var(--blue2);font-size:12px;font-weight:850;letter-spacing:.13em}.hero h1{font:800 clamp(34px,7vw,58px)/1.02 Georgia,serif;letter-spacing:-.04em;margin:12px 0 16px;max-width:690px}.hero p{font-size:17px;line-height:1.6;color:#44566b;max-width:650px}.chips{display:flex;gap:9px;flex-wrap:wrap;margin:26px 0}.chip{border:1px solid #bed1e4;color:#285477;background:#f2f8ff;padding:7px 10px;border-radius:999px;font-size:12px;font-weight:750}.button{appearance:none;border:0;border-radius:11px;padding:14px 19px;font:800 15px/1 Inter,system-ui;color:white;background:var(--blue);cursor:pointer;transition:.16s transform,.16s background}.button:hover{background:var(--blue2);transform:translateY(-1px)}.button.secondary{background:#e8eff6;color:var(--ink)}.button:disabled{opacity:.48;cursor:not-allowed;transform:none}.progress-wrap{height:7px;border-radius:99px;background:#e7edf2;margin:18px 0 34px}.progress{height:100%;background:linear-gradient(90deg,#1994e8,#1265bd);border-radius:99px;transition:width .25s}.question{font:800 clamp(24px,4.6vw,39px)/1.16 Georgia,serif;letter-spacing:-.025em;margin:13px 0 25px}.options{display:grid;gap:11px}.option{width:100%;border:1px solid #ccd8e2;border-radius:13px;background:#fff;text-align:left;padding:15px;display:flex;gap:13px;align-items:flex-start;color:var(--ink);font:600 15px/1.45 Inter,system-ui;cursor:pointer}.option:hover:not(:disabled){border-color:#5b9bd1;background:#f6fbff}.option:disabled{cursor:default}.letter{flex:0 0 27px;height:27px;display:grid;place-items:center;border-radius:8px;background:#edf3f7;color:#456078;font-size:12px;font-weight:900}.option.selected{border-color:var(--blue);background:#f0f8ff}.option.correct{border-color:var(--good);background:#eef9f2}.option.correct .letter{background:var(--good);color:white}.option.wrong{border-color:var(--bad);background:#fff2f1}.option.wrong .letter{background:var(--bad);color:white}.feedback{margin-top:22px;padding:16px 17px;border-radius:12px;line-height:1.55;background:#f1f7fb;border-left:4px solid var(--blue)}.feedback.good{background:#edf9f2;border-color:var(--good)}.feedback.bad{background:#fff4f2;border-color:var(--bad)}.nav{display:flex;justify-content:space-between;gap:12px;margin-top:25px}.summary h1{font:800 clamp(30px,6vw,50px)/1 Georgia,serif;margin:12px 0}.score{font:800 70px/1 Georgia,serif;color:var(--blue)}.review{margin-top:24px;border-top:1px solid var(--line);padding-top:17px}.review-item{padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}.status{font-weight:800}.status.good{color:var(--good)}.status.bad{color:var(--bad)}@media(max-width:560px){header{align-items:flex-start;gap:8px;flex-direction:column}.card{padding:24px 20px}.nav{flex-wrap:wrap}.nav .button:last-child{margin-left:auto}.option{padding:13px}.eyebrow{font-size:10px}}