Search Input box is not visible.

Working on it.

Made search input box visible.

Hello,
I installed the theme in Drupal 10.4.0 version.
Visited the /search/node page and found the serach input box is not visible.
Applied the provided MR!3, which applied cleanly.
On revisiting the /search/node page the search input box was visible.
However, it seems variables are being used in the theme for color/background property. Also I noticed that the below border snippet is already present in form_input.css file

  border: var(--button-border);
  border-radius: var(--radius);

Just that the width, style and border color are not defined for the border property. As per my findings the %form_element placeholder in form_input.scss seems to be also not defined anywhere and most likely the above css properties were suppose to be defined in this placeholder due to which this issue might have occurred. IMO we can try to replace the current hex value used for the border color with variables. Attaching ss for before and after. Thus, moving to NW.
For a better solution we would be glad to hear from @tomsaw.
Thanks

Modified the changes as adviced by @esha_kundu. The changes need review.