body {
    text-align: center;
}

#quiz {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #f9f9f9;
}

.option {
    margin: 10px 0;
    padding: 10px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 5px;
    cursor: pointer;
}

.option:hover {
    background-color: #e0e0e0;
}

#feedback {
    margin-top: 10px;
    font-weight: bold;
}

.correct {
    color: green;
}

.incorrect {
    color: red;
}