/** Dark Mode **/
html[data-theme=dark] .site-header form button[type="submit"] {
    background: #0d6efd;
    border: 1px solid #0d6efd;
}

/** Light Mode **/
html[data-theme=light] .site-header form button[type="submit"] {
    background: #198754;
    border: 1px solid #198754;
}

/** Light Mode **/
html[data-theme=light] .site-header form button[type="submit"] .btn__icon{
    color: #fff;
}