You have an open tag on line 19:
<script src="http://use.edgefonts.net/source-sans-pro:n6:default.js" type="text/javascript">
needs to be
<script src="http://use.edgefonts.net/source-sans-pro:n6:default.js" type="text/javascript"></script>
or the entire page will be treated as a javascript.... 