How can I center the marked part in the Boundless Theme?

[Hi_J]

I’d like to put the marked part in the center, please help me.

Boundless Theme

[oscprofessional]

Hello,
Please share your site url.

[dmwwebartisan]

@Hi_J

Please share your store URL.

[Hi_J]

I did the solution by myself.
thank you so much for trying to help