When using the Instagram feed plugin or other plugins, you may encounter the problem that the right side of the negative margin does not work. This is because the width is set to 100%, resulting in a margin on the right side.
To solve this problem, set width to auto. Also, add “!important” so that other style settings do not take precedence. Set as follows
width: auto !important;.This will eliminate the right margin and allow negative margins to function properly.