Hello @Stelio,
Please copy and paste the following CSS code into XStore >> Theme Options >> Theme Custom CSS >> Global CSS and then clear your browser cache. You can adjust the Font Size and Font Weight values in the code as needed. The result should look like the image provided (https://postimg.cc/cgcW3BV2):
.search-full-width form .search-content-head .products-title {
font-size: 20px !important;
font-weight: 700 !important;
}
.search-full-width form .ajax-extra-content .ajax-search-categories .products-title {
font-size: 20px !important;
font-weight: 700 !important;
}
Best Regards,
8Theme’s Team