Hello, Ahmed!
Insert the next custom CSS codes into Customizing->General->Additional CSS:
@media only screen and (min-width: 992px) {
#vision-search-open-icon{
display:none!important;
}
#vision-search-box{
top:15%!important;
right:120%!important;
padding: 5px;
border: 1px solid #eeee22!important;
opacity: 1!important;
visibility: visible!important;
transform: scale(1)!important;
min-width: 500px!important;
};
}
Change the min-width and border color values per your needs.
Regards