Thanks mango404, mahfuz.
I tried to aply css by mango404.
If a user is not logged in, the problem is solved.
However, when a user loged in, the [Site Name] in the upper left is moved to the right. This causes the user’s profile to go down under the site name.
And I don’t understand <div>.
In fact, loged in users doesn’t need the [Site Name] of the top bar when the user logs in.
So, is there any way to delete or hide the site name except admin user?

my site is,
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• This reply was modified 2 years, 7 months ago by geront.
• This reply was modified 2 years, 7 months ago by geront.
• This reply was modified 2 years, 6 months ago by Jan Dembowski.