CSS Page Title Size Mobile 7.1

Site URL: https://tincanflowertruck.com

The password for my site is tincan@2020!

I know there have been other posts about this, but I'm trying to change the size of the Shop and Subscription page titles for mobile with CSS. I may have the wrong block id. Could someone help?

Thanks!

Add to Shop Page Settings > Advanced > Header

<style>
@media screen and (max-width:767px) {
h3.nested-category-title.nested-category-title-padding {
    font-size: 20px !important;
}
}
</style>

Add to Subscriptions Page Settings > Advanced > Header

<style>
@media screen and (max-width:767px) {
h3.nested-category-title {
font-size: 20px !important;
}
</style>

thank you!