I've created a tabbed section on a SharePoint 2016 page, containing a number of list web parts. (I've used Christophe Humbert's Easy-Tabs-v5 to accomplish this, with modifications to suit the site's style theme.)
However, there is an unsightly 1px gap between the tab and its content:
This seems to be an allowance for the 1px blue border that appears when a list web part is selected. I have come across several sets of instructions on how to remove that blue border, which has resolved my issue for when the web part is selected.
I'd like the tabs to appear like the above, even when they are not selected. Is there a way to remove this 1px white border allowance around unselected list view web parts?
Any help would be greatly appreciated. I do not have access to SharePoint Designer, so would appreciate any suggestions that do not require this access.