Change font size of tagline on front page

I saw one thread about changing a font size for tagline but when I inserted the code that was provided it said there were 2 errors in the code. Is there code for Shapely to change font size of front page tagline? Thanks.

Hello there,

I hope you are doing well today.

Could you please provide a link to your website so that I can create some new CSS for the tagline?

Best Regards,