.search-form label,
.widget_search label {
    display: block !important;
    font-size: 16px !important;
    color: #000 !important;
}
.widget_search label {
    position: absolute !important;
    left: -9999px !important;
}
.widget_search button,
.search-form button {
    color: #000 !important;
}