Reply To: Tagline Length or change font size

Please add the below CSS on Appearance > Customize > Layout/Design Options > Custom CSS

.site-logo {
    width: 100% !important;
    text-align: center;
}

After adding this, you need to hide the Date and Search from the header, because your tagline is too long so that it will appeared weird on the header part because of
date and search. Please try once and let us know.

Warm Regards,
Acme Supports