Uppercase letters in City label Shipment details

[Zoi]

Hello everyone

I am using VirtueMart 3.8.8 10472
with HELIX 3 FRAMEWORK

I want to force City label in Shipment Details to be written in Uppercase letters.

I explain further i want when my client enters the City with Lowercase letters to transform them in Uppercase with some CSS maybe like : text-transform: uppercase;
Which part of code i must select to do that?

[Zoi]

I find it by accident i post it for others

In my custom CSS code i entered the code:

#city_field.required
{
    text-transform: uppercase;
}

and now when a client enters the City with lowercase letters it turns them to Uppercase