Solved
Lokesh_ShivalingaiahAccepted solution
Level 10
Nov 18, 2015 4:30 PM UTC
OOB css comes from here /etc/clientlibs/granite/coralui2/optional/rte/css/cui-rte.css
and as you mentioned, some of them may get override for other css added. and in such cases, we may have to add extra css like what you have done to handle the same.