body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    text-align: center;
}

.quiz-container {
    background: white;
    padding: 20px;
    width: 50%;
    margin: auto;
    border-radius: 10px;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.2);
}

button {
    padding: 10px 20px;
    background-color: #28a745;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 16px;
    border-radius: 5px;
}

button:hover {
    background-color: #218838;
}

.correct {
    color: green;
    font-weight: bold;
}

.incorrect {
    color: red;
    font-weight: bold;
}