Topic: How to change search appearing in header

Hello,

You can edit header structure file depending on header type that you use, in your case, it is xstore/headers/center.php. Do all the changes in child theme files.
If you need help with customization you may contact WPKraken team.

Regards

In this case, you can use css code (add own code in Theme Options > Styling > Custom css or in style.css of child theme).
For example:

.header-search.act-default [role="searchform"] .btn {
    background-color:  transparent;
    margin-right: 3px;
}
.header-search .fa:before {
    color: #b1b1b1;
}
.header-search.act-default input[type="text"] {
    border-color: #c1c1c1;
}
.header-search.act-default [role=searchform] .btn:hover {
    background-color:  transparent;
}

Regards