CDHtmlDialog not working with CSS Media Queries

Hello there,

I have a CDHtmlDialog app in which am trying to add a CSS media query in the HTML file as shown below, but it doesn't work.

@media (max-width:20em) {
table, thead, tbody, tfoot, th, td, tr { display:block; }
tr + tr { margin-top:1em; }
}

The same CSS works fine if i open in a browser like IE, FireFox, Chrome. But inside the CDHtmlDialog app this doesn't work.

I am using Visual Studio 2012 for development and have IE 11 installed in my machine.

Any ideas?

THanks in advance.