Error HTML5 in Content Editor

hello,good day.

I have a questiontothem, because I get an errorwhen run amodalwindow in content editor  in internet explorer 11 ifsomeone could help meI would greatly appreciate.

I run this code html5 and css3 modal window in content editor:

<style type="text/css">
.modalDialog {
 ;
 font-family: Arial, Helvetica, sans-serif;
 top: 0;
 right: 0;
 bottom: 0;
 left: 0;
 background: rgba(0,0,0,0.8);
 z-index: 99999;
 opacity:0;
 -webkit-transition: opacity 400ms ease-in;
 -moz-transition: opacity 400ms ease-in;
 transition: opacity 400ms ease-in;
 pointer-events: none;
}
.modalDialog:target {
 opacity:1;
 pointer-events: auto;
}
.modalDialog > div {
 width: 400px;
 ;
 margin: 10% auto;
 padding: 5px 20px 13px 20px;
 border-radius: 10px;
 background: #fff;
 background: -moz-linear-gradient(#fff, #999);
 background: -webkit-linear-gradient(#fff, #999);
 background: -o-linear-gradient(#fff, #999);
}
.close {
 background: #606061;
 color: #FFFFFF;
 line-height: 25px;
 ;
 right: -12px;
 text-align: center;
 top: -10px;
 width: 24px;
 text-decoration: none;
 font-weight: bold;
 -webkit-border-radius: 12px;
 -moz-border-radius: 12px;
 border-radius: 12px;
 -moz-box-shadow: 1px 1px 3px #000;
 -webkit-box-shadow: 1px 1px 3px #000;
 box-shadow: 1px 1px 3px #000;
}
.close:hover { background: #00d9ff; }

</style>

<a href="#openModal">Open Modal​​​</a> <div class="modalDialog" id="openModal"><div><a title="Close" class="close" href="#close">X</a> <h2>Modal Box</h2>
<p>This is a sample modal box that can be created using the powers of CSS3.</p>
<p>You could do a lot of things here like have a pop-up ad that shows when your website loads, or create a login/register form for users.</p></div></div>

But when I open the page in internet explorer 11 It showsmewhatfollows:

Opens themodalwindowwithout meclickinOpenModalandif I try toclose themodalwindowdoes not close, this happensonlyinternet explorerif I open  siteingooglechromeeverything works fine. to believe that it canbe happeningorconfiguration Ihave to doto HTML5 works fine in SharePoint andinternet explorer?

laureano Adriano