Add a simple sentence on header (Using Zion template)

Site URL: https://zion-demo.squarespace.com

I would like to add a text on the header.

What would be the CSS code for adding it either next to the "logo" or underneath it ? Also, can I change its style according to what I already have, as well as its position (for example if I like the sentence is way too low from the logo) ?

Thanks

Just now, Cicada1010 said:

Site URL: https://zion-demo.squarespace.com

I would like to add a text on the header.

What would be the CSS code for adding it either next to the "logo" or underneath it ? Also, can I change its style according to what I already have, as well as its position (for example if I like the sentence is way too low from the logo) ?

Thanks

Also, I have this code:

a#site-title:after {

    content: "Designer | Creative";

    display: block;

    font-size: 20px;

}

But I can't seem to change its position because its far below from the logo.