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

#quiz-container, #score-container {
    background-color: #fff;
    width: 70%;
    margin: 50px auto;
    padding: 20px;
    border-radius: 8px;
  border:1px solid black;
}

.hidden {
    display: none;
}

#question-container {
    font-size: 20px;
    margin-bottom: 20px;
}

.option {
    display: block;
    margin: 10px 0;
}

button {
    padding: 10px 20px;
    font-size: 16px;
}