This members-only tutorial provides the steps to replace Flexbox with CSS Grid for styling Oxygen's Easy Posts grid output without using media queries.

Note:

1. This article covers the default preset, Grid - Image - Standard.
2. CSS Grid may not be fully supported in IE. I have not tested this solution in IE or Edge. See the support here.
3. The out of the box break points for Easy Posts are 1120px and 768px where the posts get 50% and 100% width respectively. With the solution in this tutorial, it is going to be 1119px and 759px. These will of course dynamically change depending on the (horizontal) grid-gap and padding values we are going to set for .oxy-posts.

Advantages of this method:

1. Beautiful, minimal and progressive CSS.
2. Solves this problem gracefully.

Step 1

Easy Posts > Templates > Template CSS.

Replace

%%EPID%% .oxy-posts {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
}

%%EPID%% .oxy-post {
  display: flex;
  flex-direction: column;
  text-align: left;
  align-items: flex-start;
  margin-bottom: 3em;
  width: 33.33%;
  padding: 1em;
}

with