:root{--ink:#172033;--muted:#64748b;--brand:#5146e5;--brand2:#3227bd;--bg:#f4f7fb;--card:#fff;--line:#e3e8f1;--ok:#069669;--warn:#d97706;--bad:#dc3545;--shadow:0 14px 35px rgba(31,41,55,.08)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}button,input,textarea,select{font:inherit}button{cursor:pointer}.shell{min-height:100vh}.topbar{height:72px;background:#17152d;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 max(22px,calc((100vw - 1180px)/2));position:sticky;top:0;z-index:5}.brand{display:flex;align-items:center;gap:12px;font-weight:800}.logo{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#756cf4,#5146e5)}.nav{display:flex;gap:8px;align-items:center}.nav button{color:#d9d7ed;background:transparent;border:0;border-radius:9px;padding:9px 12px}.nav button.active,.nav button:hover{background:#302d4d;color:#fff}.wrap{max-width:1180px;margin:0 auto;padding:36px 22px}.hero{padding:34px;border-radius:24px;color:white;background:linear-gradient(125deg,#27234f,#5146e5);display:flex;justify-content:space-between;align-items:center;gap:24px;box-shadow:var(--shadow)}h1,h2,h3,p{margin-top:0}.hero h1{font-size:clamp(28px,4vw,44px);margin-bottom:10px}.hero p{color:#dedcf9;max-width:650px;margin:0}.eyebrow{text-transform:uppercase;font-size:12px;letter-spacing:.13em;font-weight:800;color:#8178ee}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px}.card,.panel{background:var(--card);border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow)}.card{padding:23px;display:flex;flex-direction:column}.card h3{margin:14px 0 8px}.card 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p{color:var(--muted);line-height:1.6}.demo-users{display:grid;gap:9px;margin-top:18px}.demo-users button{width:100%}.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px}.panel{padding:24px}.exam-head{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:22px}.timer{font-variant-numeric:tabular-nums;background:#eceafd;color:var(--brand);font-weight:900;border-radius:999px;padding:9px 15px}.timer.danger{background:#feecef;color:var(--bad)}.question{font-size:20px;line-height:1.55;font-weight:700}.options{display:grid;gap:11px}.option{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;padding:14px;cursor:pointer}.option:hover{border-color:#9a94ee}.option.selected{background:#f0efff;border-color:var(--brand)}.exam-actions{display:flex;justify-content:space-between;gap:10px;margin-top:24px}.palette{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.palette button{aspect-ratio:1;border:1px 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