<!DOCTYPE html>
<html>
<head>
  <title>Reference: Testing safe overflow-position for align-self in absolutely positioned boxes in reverse flex containers w/ item margin</title>
  <link rel="author" title="Mihir Iyer" href="mailto:miyer@mozilla.com">
  <link rel="author" title="Alison Maher" href="mailto:almaher@microsoft.com">
  <meta charset="utf-8">
  <style>
    .flex {
      display: flex;
      height: 50px;
      width: 50px;
      border: 3px solid black;
      vertical-align: top;
      margin: 20px