:root{--ink:#17202b;--muted:#637083;--line:#dce1e8;--paper:#fff;--canvas:#f6f8fb;--accent:#165dff;--warning:#9b3b00}*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--canvas);color:var(--ink);font:16px/1.5 Arial,Helvetica,sans-serif}a{color:inherit;text-underline-offset:3px}button,input{font:inherit}.shell{width:min(900px,calc(100% - 32px));margin:0 auto;padding:28px 0 64px}.topbar{display:flex;align-items:center;justify-content:space-between;min-height:32px;color:var(--muted);font-size:.9rem}.brand{color:var(--ink);font-size:.84rem;font-weight:800;letter-spacing:.12em;text-decoration:none}.intro{max-width:650px;padding:clamp(70px,14vh,150px) 0 76px}.eyebrow,.test-head>p:first-child{margin:0 0 10px;color:var(--accent);font-size:.8rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}h1{margin:0;font-size:clamp(2.35rem,7vw,4.75rem);line-height:1.02;letter-spacing:-.055em}.intro>p:not(.eyebrow){max-width:550px;margin:26px 0 30px;color:var(--muted);font-size:1.12rem}.primary{display:inline-flex;justify-content:center;border:0;border-radius:8px;padding:12px 18px;background:var(--accent);color:#fff;cursor:pointer;font-weight:700;text-decoration:none}.primary:hover{background:#074bd8}.primary:disabled{cursor:wait;opacity:.65}.rules{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}.rules div{display:grid;gap:5px;padding:18px 14px 0 0;color:var(--muted)}.rules b{color:var(--ink);font-size:1.35rem}.rules span{font-size:.86rem}.steps{display:flex;gap:8px;margin:44px 0 42px}.steps span{display:grid;width:28px;height:28px;place-items:center;border:1px solid var(--line);border-radius:50%;color:var(--muted);font-size:.8rem}.steps .active{border-color:var(--ink);color:var(--ink);font-weight:800}.steps .done{border-color:var(--accent);background:var(--accent);color:#fff}.test-head{margin-bottom:36px}.test-head h1{font-size:clamp(2rem,5vw,3.4rem)}.muted{color:var(--muted)}.test-head .muted{max-width:610px;margin:16px 0 0}.questions{display:grid;gap:16px}.question{min-width:0;margin:0;padding:22px;border:1px solid var(--line);border-radius:10px;background:var(--paper)}.question legend{max-width:100%;padding:0;font-size:1.06rem;line-height:1.4}.options{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.option{display:inline-flex;min-height:40px;align-items:center;gap:9px;border:1px solid var(--line);border-radius:6px;padding:7px 11px;cursor:pointer}.option:hover{border-color:#95a0b0}.option.selected{border-color:var(--accent);background:#edf3ff}.option input{position:absolute;opacity:0}.option b{display:grid;width:22px;height:22px;place-items:center;border-radius:50%;background:#edf0f4;font-size:.78rem}.option.selected b{background:var(--accent);color:#fff}.option.conflicting{border-color:#dc2626;background:#fff1f1;color:#991b1b}.option.conflicting b{background:#dc2626}.alert{margin:20px 0 0;border-left:3px solid #e98238;padding:11px 14px;background:#fff4e9;color:var(--warning)}.actions{display:flex;align-items:center;gap:18px;margin-top:30px}.text-button{color:var(--muted);font-size:.92rem}.finish{max-width:600px;padding-top:clamp(44px,12vh,120px)}.finish h1{font-size:clamp(2.8rem,7vw,4.4rem)}.finish form{display:grid;gap:14px;max-width:410px;margin-top:30px}.finish label{display:grid;gap:7px;font-size:.9rem;font-weight:700}.finish input{width:100%;border:1px solid var(--line);border-radius:7px;padding:12px;background:#fff}.leaderboard{margin:0;padding:0;border-top:1px solid var(--line);list-style:none}.leaderboard li{display:grid;grid-template-columns:38px minmax(120px,1fr) minmax(120px,1fr) 90px;gap:10px;align-items:center;border-bottom:1px solid var(--line);padding:15px 0}.leaderboard li span{color:var(--muted);font-size:.92rem}.leaderboard .place{color:var(--ink);font-weight:800}.leaderboard .empty{display:block;color:var(--muted)}@media(max-width:600px){.shell{width:min(100% - 24px,900px);padding-top:20px}.intro{padding:70px 0 55px}.rules{grid-template-columns:1fr;gap:8px;padding-top:9px}.rules div{grid-template-columns:34px 1fr;align-items:center;padding:0}.steps{margin:30px 0}.question{padding:17px}.options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.option{min-width:0}.actions{align-items:flex-start;flex-direction:column}.leaderboard li{grid-template-columns:28px 1fr 80px}.leaderboard li span:nth-last-child(2){grid-column:2/4}.leaderboard li:last-child{grid-template-columns:1fr}}