Custom css

Can some please tell how to apply custom css means I am not getting syntax of css to be written  in style section of a particular widget.   Here in this page output for tags is every tag is on a new line . With custom css I want to make it shows  Tag docker aws etc. and not  tag docker tag aws likethis .
1 answers

Do you have a style editor like Koala, which compiles your css and sas files into database?