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Test Info:

<!DOCTYPE html>
<link rel="match" href="input-no-centering-ref.html">
<style>
input {
appearance: none;
margin: 0;
width: 200px;
height: 200px;
}
input:before {
content: "";
display: block;
width: 100px;
height: 100px;
background: green;
}
</style>
<input type="radio">