<body style="height: 100%">
<div id="content" style="width: 100%; height: 100%">
<svg xmlns="http://www.w3.org/2000/svg" version="1.1"
width="100%" height="100%"
viewBox="0 0 1024 768"
preserveAspectRatio="xMidYMid meet">
...
</svg>
</div>
</body>
html, body { margin:0; padding:0; overflow:hidden }
svg { position:fixed; top:0; left:0; height:100%; width:100% }
html, body { margin:0; padding:0; overflow:hidden }
svg { position:fixed; top:0; bottom:0; left:0; right:0 }