My Semantic IndieWeb Theme currently being used for the site has been updated to provide a more responsive design. On landscape tablet or wider screens, the author card now displays in a column on the right side of the screen. On smaller devices, such as ones phone, the author card will continue to render at the end of the page.
There is a fair amount of yet-to-be-used whitespace under the author card in the wide screen view. Eventually I plan to put some navigation controls there, for sections and/or taxonomy terms.