That fixed that issue but now if someone clicks on the drop-down previously typed in text the blue color comes back without filling the entire search bar, and is this the best way to make the changes by adding this css code in the customizer? how big of an impact is it on site speed? https://postimg.cc/HrJjRZ15
There won’t be any noticeable impact on speed regarding the CSS size.
Can you link me to your site where we can see the search bar?
Please be noted, that the search block is NOT from the theme, it’s from WP and the theme doesn’t have control over it, it’s kind of out of the scope of the theme support, but we are still trying our best to help you out here.