Why isn't my CSS theme saving changes on my site?

I understand your point perfectly. Indeed, managing a Shopify store often involves dealing with recurring minor and big issues. You can either seek solutions in forums or hire professional support. Our services encompass a wide range of tasks, even beyond what you’ve mentioned. Premium themes often limit customization options, and relying solely on copy-and-paste methods without CSS knowledge can lead to unintended consequences elsewhere on your website. The area you’re referring to might be defined in a separate file or embedded inline.

To adjust the font size of the text in that specific area, you can add the following codes to your “base.css” file:

.product-single__prices #ProductPrice, .product-single__prices #ComparePrice {
    font-size: 35px;
}