Classic postbit remove gap between post_content and classic div

[lkop]

i trying to remove the gap from "post_content" right side. i using default mybb theme and classic postbit. can some please help me. here is the screenshot for better understand. thanks in advanced.

https://i.imgur.com/NNdOhSl.png

[HLFadmin]

post_content css shows default styling is width 79% and padding is 0 1% 5px 1% (top right bottom left)
Change respectively to 80% and 0 0 5px 1%

I took the 1% right padding and moved it to the width. That's the quickest easiest way to get close to your image which shows content in the same right position as "Threaded Mode" above it.