body { font-family: Arial, sans-serif; padding: 20px; background-color: #f0f8ff; }
    h1 { color: #2c3e50; }
    .question { margin-bottom: 20px; }
    .question h3 { margin-bottom: 10px; }
    button { margin-top: 10px; padding: 10px 20px; }
    .result { font-weight: bold; margin-top: 10px; }