body {
    background-color: #f8f9fa;
    font-family: 'Arial', sans-serif;
}
.listening-container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.listening-question-title {
    color: #2c3e50;
    font-weight: bold;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid #007bff;
    padding-bottom: 0.5rem;
}
.listening-question-subtitle {
    color: #34495e;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}
.form-control.d-inline-block {
    width: auto;
    min-width: 150px;
    display: inline-block;
    margin: 0 0.5rem;
}
.audio-player {
    margin-bottom: 1.5rem;
    width: 100%;
    border-radius: 5px;
}
.form-section {
    background-color: #f1f3f5;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}
.radio-group, .checkbox-group {
    margin-bottom: 1.5rem;
}
.radio-group label, .checkbox-group label {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}
.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 5px;
}
.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}
.btn-secondary {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 5px;
}
#result {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 5px;
    background-color: #e9ecef;
}