html - How to change the background color of pop up header? -

i getting issue in background color on popup header.i trying change background color of pop header using below code not working. header background color popup not taking below css. please me.

html

    <a href="#openmodal">open modal</a>         <div id="openmodal" class="modaldialog">                          <div class="pop-header">                             <a href="#close" title="close" class="close">x</a>                         </div>     </div> 

css

    .pop-header     {          width: 100%;          background-color: #000;          height: 50px;          padding: 20px;     }       .modaldialog {         position: fixed;         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: 600px;         position: relative;         margin: 2% auto;         padding: 5px 20px 13px 20px;         border-radius: 5px;         background: #fff;         height: 100%;     }      .close     {         float: right;     } 

change color background in .modaldialog > div css.

.modaldialog > div {         width: 600px;         position: relative;         margin: 2% auto;         padding: 5px 20px 13px 20px;         border-radius: 5px;         background: red; //here         height: 100%;     } 

fiddle

edit:

if want change color of header part should put 1 div parent .pop-header

<div>   <div class="pop-header">   <a href="#close" title="close" class="close">x</a> </div> 

and css:

.pop-header     {        width: 100%;        background-color: red;        height: 50px;     } 

updated fiddle

check per image

new fiddle