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<!DOCTYPE HTML>
<meta charset="UTF-8">
<style>
html, body { overflow: hidden; margin: 0; padding: 0; border: none; }
.wrapper {
box-sizing: border-box;
width: 100px;
padding-right: 20%;
}
#inner {
height: 1em;
background: aqua;
}
</style>
<div class="wrapper">
<div id="inner"></div>
</div>