Blogs: Remove drop-shadow on blog posts

Before:

After:

Code to use:

/* -- code remove drop-shadow on blog posts -- */
.blog__article {
  box-shadow: none;
  border:1px solid #f1f1f1;
}
/* - end - */

Option without any border:

/* -- code remove drop-shadow on blog posts -- */
.blog__article {
  box-shadow: none;
  border:none;
}
/* - end - */

Result:

Where do I add the code?

Use this link to learn where exactly to add this code snippet:

Where to add your CSS style code