Reply To: Several questions… please help and answer my ticket!

1. Add CSS code for hover state also

.footer-container .mc4wp-form input[type=submit] {
    background-color: #000000;
    border-color: #000000!important;
}

.footer-container .mc4wp-form input[type=submit]:hover {
    background-color: #e85a80;
    border-color: #e85a80!important;
}

3. Of course you can turn on the sidebar in Theme Settings -> Shop -> Shop page layout. Then just add your widgets in Appearance -> Widgets.

4. Here is a custom CSS to remove this border

.single-product-content .variations_form+.yith-wcwl-add-to-wishlist { border:none!important;}

and to remove Compare button

.compare-btn-wrapper {display:none;}

5. You can do this changes in the file basel/woocommerce/single-product/related.php. Override this file in your child theme to prevent loosing changes after update.