Graphic Problem in Blog List

Hallo again everybody,

I have a little problem in the blog list page, im customizing the aspect of the entire page just separating each post in a cell, but I cant properly customize the articles without redrawing the entire blog list page.
This is the CSS cose I use:

.single article.post .entry-main,
.page article.page .entry-main{
	/* Material design CELL */
	padding: 5px;
	border-style: solid;
	border-width: 1px;
	border-color: rgba(96, 96, 96, 0.35);
	-webkit-border-radius: 3px;
	-moz-border-radius: 3px;
	border-radius: 3px;
}

It’s working properly for every pages and posts and also for each post in blog list but here in the blog list page it applies the same effects to the entire page, how can I deny this?

this is basically what happens: http://www.khappa.com/k-blog/