#quiz-sidebar {
    background-color: #f9f9f9;
    padding: 20px;
    border: 1px solid #ddd;
}

#quiz-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

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

#navigation-buttons {
    margin-bottom: 20px;
}

#navigation-buttons button {
    margin-right: 10px;
    padding: 10px 20px;
    background-color: #007bff;
    color: #fff;
    border: none;
    cursor: pointer;
}

#timer,
#score {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

#review-mode-button,
#help-button,
#bookmark-button,
#submit-button {
    display: block;
    width: 100%;
    padding: 10px 20px;
    margin-bottom: 10px;
    background-color: #007bff;
    color: #fff;
    border: none;
    cursor: pointer;
}

#review-mode-button:hover,
#help-button:hover,
#bookmark-button:hover,
#submit-button:hover {
    background-color: #0056b3;
}

#review-mode-button:focus,
#help-button:focus,
#bookmark-button:focus,
#submit-button:focus {
    outline: none;
}