On desktop display, site title is not visible when the font color is black.
On the mobile device display the site title and logo position are below the header image.
When the site title font color is changed to white, it will not be visible on the mobile device display.
Please the solution
Regarding your query related to site title is not visible when the font color is black, actually site title is not being visible due to color of header image which is likely to be similar with black color.
Also, regarding the query related to the site title and logo position are below the header image, the layout structure has been managed through theme itself.
Further, regarding the query related to site title font color is changed to white, it will not be visible on the mobile device display, actually the background color behind the site title is also white in mobile view. So, it is not being visible.
The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.