*{box-sizing:border-box;font-family:Arial,Helvetica,sans-serif}
body{background:#f6f8fa;color:#111;margin:0;padding:20px}
.container{max-width:760px;margin:0 auto;background:#fff;padding:20px;border-radius:8px;box-shadow:0 4px 12px rgba(16,24,40,.08)}
h1{margin-top:0}
.subtitle{color:#333}
.controls{display:flex;gap:8px;align-items:center;margin:12px 0}
select,input{padding:8px;border:1px solid #ddd;border-radius:6px}
button{background:#0a84ff; color:#fff;border:none;padding:8px 12px;border-radius:6px;cursor:pointer}
.card{margin-top:12px;padding:16px;border:1px solid #eee;border-radius:8px;background:#fafafa}
.question{font-size:1.1rem;margin-bottom:12px}
.answer-area{display:flex;gap:8px}
.feedback{margin-top:12px;font-weight:600}
.footer{margin-top:18px;text-align:center;color:#666}