.quiz-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 20px;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}
.quiz-container p {
    color: #333;
}
.quiz-container pre {
    font-size: 95%;
}

.options button {
    display: block;
    width: 100%;
    margin: 10px 0;
    padding: 10px;
    font-size: 16px;
    background: #007BFF;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.5s;
}

.options button:hover {
    background: #0056b3;
}

.result {
    margin-top: 20px;
    padding: 10px;
    font-size: 18px;
    text-align: center;
    border-radius: 4px;
}

.result.correct {
    background: #d4edda;
    color: #155724;
}

.result.incorrect {
    background: #f8d7da;
    color: #721c24;
}

.explanation {
    display: none;
    margin-top: 10px;
    font-size: 14px;
    color: #333;
}

.explanation.show {
    display: block;
}