Always put any css updates in your custom.css for that theme and in any other theme you have on your site. How many times do I have to tell you this!???
/* #css by Ed. */
.global-search {
background-color: transparent;
/* or any colour you want #fff; */}
#global-search:hover,#global-search:active,#global-search:focus {
background-color: white !important;
color: black !important;
}
.global-search:hover,.global-search:active,.global-search:focus{
color: black !important;
background-color: white !important;
}
Please read this as you never have!
https://community.moosocial.com/topics/view/879/create-a-new-theme