<!doctype html>
<html>
<head>
<meta charset="utf-8"/>
<title>Flex Items: align-content</title> 
<link rel="stylesheet" href="c/examples.css"/>
<style>
body {
  padding: 10px; 
  display: flex; 
  justify-content: space-evenly; 
  flex-wrap: wrap;
  font-size: 25px;
  text-align: center;
}
div {
  background-color: rgba(0,0,0,0.1);
}
article {
  position: relative; 
  width: 320px;
}
article > div {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  flex-wrap: wrap;
  border: 1px dashed;
  hei