Customize author box

Ok the CSS above it ie. this is missing a closing } so your author box styles are only being applied to larger screens. In the CSS below i have commented where you need to add the missing bracket.

@media (min-width: 769px) {
    #right-sidebar {
        width: 350px;
    }

    .inside-right-sidebar {
        padding-right: 20px;
    }

    body:not(.no-sidebar) #primary {
        width: calc(100% - 350px);
    }
} /* Add this bracket */

Thank you David! It worked perfectly!

Sorry for the inconvenience. Have a great day

No problems - glad to be of help.