*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Helvetica,Arial,sans-serif;background:#f7f7fb;color:#222}.container{max-width:960px;margin:0 auto;padding:16px}.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:16px;margin:12px 0;box-shadow:0 1px 2px #0000000a}.button{display:inline-block;padding:10px 14px;border-radius:8px;border:1px solid #1f6feb;background:#1f6feb;color:#fff;text-decoration:none;cursor:pointer}.button.secondary{background:#fff;color:#1f6feb}.row{display:flex;gap:12px;flex-wrap:wrap}.row>*{flex:1 1 280px}.badge{display:inline-block;background:#eef2ff;color:#3730a3;border-radius:999px;padding:4px 10px;font-size:12px}input,select{padding:8px;border-radius:8px;border:1px solid #cbd5e1;width:100%}label{font-weight:600;margin-bottom:6px;display:block}hr{border:none;border-top:1px solid #e5e7eb;margin:16px 0}.question{font-size:18px;margin-bottom:12px}.answers{display:grid;grid-template-columns:1fr;gap:8px}.answer{padding:10px;border-radius:8px;border:1px solid #d1d5db;background:#fff;cursor:pointer}.answer.selected{border-color:#1f6feb;background:#eff6ff}.answer.correct{border-color:#16a34a;background:#ecfdf5}.answer.incorrect{border-color:#dc2626;background:#fef2f2}.actions{display:flex;gap:12px;margin-top:16px}nav{background:#111827;color:#fff}nav .container{display:flex;justify-content:space-between;align-items:center}nav a{color:#fff;text-decoration:none;margin-right:12px}footer{padding:16px;color:#6b7280;text-align:center}