I am trying to create HTML tables within text attributes added to the pop-up configuration in the New Map Viewer and I cannot figure out how to set the table width
I have tried using html and css style widths, yet the tables appears to be the width of the data as shown here:

In this case, the upper table is as wide as the DeviceId value (not shown in the image) and the lower table is only as wide as the QC Check variable.
How can I force the table widths to be full width regardless of the data length?
Thanks in advance for your help.