Is there a .css code that forces IE 11 viewers to view your .css in compatibility mode?
The best solution is to make
The best solution is to make your website use the edge mode, this way it will use the highest possible.
This is how you can achieve this by placing the following code inside your HEAD:
<meta http-equiv="X-UA-Compatible" content="IE-edge" />
Also, don't forget to place the following code inside your website, completely at the top of your page (above your HEAD tags):