lemcbl Not sure where to edit that css but will try to figure it out
To append to saguaros's suggestion, You can add the above suggested CSS to custom.css file :
Finding custom.css or you may create a new file with similar name (if it doesnt exist)
Shape 5 templates ship with an empty custom.css file in the /css/ subdirectory of your template. Simply add your styles to this file and they will be included in your layout.
Kindly ensure to clear your browser cache if changes dont reflect