I haven’t looked — can’t… on mobile — but making a td into a block element by changing its display property can sometimes be useful.
Are the issues related to you not being able to target the specific td with appropriate selectors, OR that you can target it but can’t get the full width to work as desired?
To attract helpful responses, try mocking up the issue in a reduced CodePen demo – code is easier for us to troubleshoot there (we’re not restricted to the developer toolbar), and doesn’t come with the weight of all the extra code and distractions of a full website. Note that we only need the minimal amount of CSS and HTML to illustrate the problem. We don’t need your whole codebase. You may have to use the developer toolbar and inspect each element in turn to extract all the pertinent styles.