#page_ids {
    width: 100%;
    height: 200px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    background-color: #f9f9f9;
    font-size: 14px;
    color: #333;
    overflow-y: auto;
}

#page_ids optgroup {
    font-weight: bold;
    color: #555;
}

#page_ids option {
    padding: 5px;
}

#page_ids option:hover {
    background-color: #e6f7ff;
    cursor: pointer;
}