Hello Francesco,

Thank you for purchasing our plugin,

Certainly, I'd be happy to try write some CSS to make that form display better and more in tune with the rest of the theme.

I looked into it now on your site at https://www.kitchenselite.com/mio-account/ 

In my opinion the current input fields such as the ones for login also need a border because the grey is very similar to the background (at least they appear very similar on my monitor).

I wrote the following CSS:

.b2bking_logged_out.woocommerce-account input.input-text, .b2bking_logged_out.woocommerce-account select {
    border: 1px solid #d6d6d6 !important;
}
.b2bking_custom_registration_field {
    height: 46px !important;
    background: #f8f8f8 !important;
    font-size: 15px !important;
    border: 1px solid #d6d6d6 !important;
    padding: 0px 11px;
    margin-bottom: 17px !important;
}
.b2bking_custom_registration_container label {
    margin-bottom: 1px !important;
}
.b2bking_logged_out.woocommerce-account select#b2bking_custom_field_78 {
    border: 0px !important;
}
.b2bking_logged_out.woocommerce-account select#billing_state {
    border: 0px !important;
}

When adding it to my local browser, I see:

This can be added to any area that supports CSS, usually to Appearance -> Customize -> Additional CSS / Extra CSS.

Kind regards,

Stefan