body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    margin: 0;
    padding: 0;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #ff69b4;
    color: white;
    padding: 15px;
}

.quiz-container {
    max-width: 800px;
    margin: auto;
    padding: 20px;
}

.category {
    margin-bottom: 10px;
}

.category-toggle {
    width: 100%;
    background-color: #fff;
    border: none;
    padding: 10px;
    font-size: 18px;
    cursor: pointer;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.subcategories {
    display: none;
    padding-left: 20px;
}

.modal {
    display: none;
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 20px;
    border-radius: 10px;
}