<!DOCTYPE html>
<title>Reference for WebVTT rendering, set explicit 'line' and 'position', which will force 'snap-to-line' to false</title>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
html { overflow:hidden }
body { margin:0 }
.video {
    display: inline-block;
    width: 320px;
    height: 180px;
    position: relative;
}
.cue {
    position: absolute;
    top: 90px;
    left: 160px;
    text-align: center;
    font: 20px/1 Ahem;
}
.cueText {
    background: rgba(0,0,0,0.8);
    color: green;
}
</style>
<div class=video>
    <div class="cue">
        <span class="cueText">foo</span>
    </div>
</div>