Use CSS properties / classes to specify object appearance
Add unique CSS properties to object properties.
Things like Margins, Padding and un-even borders are not common for design apps, but it would be great to define them per object in XD, honor them in the design mode, and export them as part of the object css,
Adam Pietrasiak commented
You copy-paste some CSS when some element/group of elements is selected - this CSS is parsed and proper properties of elements are changed.
For example if you paste
When having text element selected, text properties are changed to match given CSS.