Sorry I wasn't that clear.
Using the current controls with the Material skin.
Have a combo box and a text box on the screen. I then remove the css on the text box that adds a 13px padding to teh left and right. That causes the grey underline under the box to expand by 26 pixels. This is the grey underline that changes to green when you click in the box.
The issue that I have is that with other controls such as the radcombobox I can't figure out what css controls the width of that same underline.
Worst case I can just leave the 13px padding in on the textbox and then everything does line up.
Does that make the issue clearer?