body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 0;
}

#quiz-container {
    max-width: 600px;
    margin: 50px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#question {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.option {
    display: block;
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: none;
    border-radius: 5px;
    background-color: #f5f5f5;
    transition: background-color 0.3s ease;
    cursor: pointer;
}

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

.correct {
    background-color: #4caf50;
    color: #fff;
}

.incorrect {
    background-color: #f44336;
    color: #fff;
}

#feedback {
    font-size: 1rem;
    margin-top: 10px;
}

#next-btn {
    display: block;
    width: 100%;
    padding: 10px;
    margin-top: 20px;
    border: none;
    border-radius: 5px;
    background-color: #2196f3;
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#next-btn:hover {
    background-color: #0d8bf5;
}