XF 2.0 how can i apply style on node thread

[hemant_bhardwaj]

hey, i am stuck again on applying css on the thread on some specific forum id only
for example :
i just want to change background color of this forum threads only not the other.

 

[S Thomas]

html[data-container-key="node-3"] {}

 

[hemant_bhardwaj]

html[data-container-key="node-3"] {}

thanks brother it's work