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Test Info:

<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
<title>The div shouldn't pull the html element's background color through the body background. There should be no red on this page.</title>
<style>
html, body {
margin: 0;
padding: 0;
height: 100%;
}
html {
background-color: red;
}
body {
transform: translateX(0.1px);
background-color: white;
box-sizing: border-box;
padding: 10px;
}
div {
position: relative;
width: 50px;
height: 50px;
box-sizing: border-box;
border: 1px solid black;
animation: leftFrom0To100 steps(1,end) 20000s alternate infinite;
}
@keyframes leftFrom0To100 {
from { left: 0px; }
to { left: 100px; }
}
</style>
<div></div>