Blogger design help, HTML/ CSS help Options

[Skrinkladoo]

Hey,

I've hit a few walls when designing my blogger template that I can't seem to figure out. I'm new to the whole Coding thing so please bear with me.

I really want to make the 20px white border/margin between all of my posts and sidebar widgets the same colour as my background. I've tried multiple things but can't get it. Any ideas?

The other thing is my popular posts widget seems to be a little messed up in terms of the padding, not sure why though as all the widgets have the padding already set a little insight into that would be great too please.

Thanks in advance

www.skrinkladoo.com

[Kelvin Smith]

See the below link.
https://css-tricks.com/almanac/properties/b/box-sizing/

Hope it works!