Double borders

by karin

HTML

<div></div>

CSS

div{
    width:100px;
    height:100px;
    border:thin solid #333;
     position: relative;
}
div:before {
   content: " ";
   position: absolute;
   z-index: -1;
   top: 5px;
   left: 5px;
   right: 5px;
   bottom: 5px;
   border: 5px solid #ffea00;
}