I've been following this documentation to implement the screen share feature with voice interactions.
My question is if there is a way to make wider the area where the client introduces the security key:
I have tried to do it modifying the "width" in the "css" property of the config object (my code is almost the same as the example), but it only makes wider the black rectangle, but not the input area:
You should be able to modify those styles with more specific CSS rules. You can use your browser's developer tools to inspect the HTML and CSS (right click > Inspect in Chrome) to determine appropriate selectors for the elements you wish to style.