How to increase the size of small header text in Astrid?

Hey I have an issue with small header text adjustment. I want it bigger, but however I change it in personalization it changes only in preview. Even if I save and publish it remains small on the website.

I tried adding a CSS, it works, however on the title and not on the subtitle (header small text to be exact).

http://drgeorgeforpartners.eu/ -> here is the website.

Could you help me out with this one please?

Any ideas?

Hello,

Please try to use the following CSS code.

You can add CSS code in DashboardAppearanceCustomizeAdditional CSS (WordPress 4.7 and up). Also you can add CSS code directly to style.css file of your child theme.

@media only screen and (min-width: 992px) {
    div.header-info h4.header-subtext {
        font-size: 32px;
    }
}

Please feel free to ask any other questions that you might have.

Kind Regards, Roman.