How to change the font size of the site title on mobile

Would you please tell me how to change the font size of the site title on mobile, is very big.
I tried the following with CSS, but not worked. Seems i need to add media queries?
is simple change size to 2 to 1 em only in mobile.
Thanks in advance

h1 {
    font-size: 1.5rem;
}

It’s possible, but this is not related to HivePress functionality, this would require CSS customizations. If you’re familiar with CSS please target listing titles via the CSS class and wrap the styles with media query, to limit the screen width to apply the styles to.