<!DOCTYPE html>
<meta charset="utf-8">
<link rel=stylesheet  href="resources/backdrop-filter-backdrop-root.css">

<div class=container>
  <div class=testcase>
    <div style="opacity:0.8"></div>
    <div class="box2" style="border-color: #003333; background: #00ffff;"></div>
  </div>
  <div class=testcase>
    <div></div>
    <div class="box2" style="background: #00ffff;"></div>
  </div>
</div>

<style>
.box2 {
  top:-50px;
  left: 50px;
  border: 1px solid black;
}
</style>

