Gradient Borders

Gradient borders without images and with pure css3.

by Victor

HTML

<div class="shell">
    
    <span class="inside"></span>
</div>

CSS

.shell {
background: rgb(149,149,149);
background: -moz-linear-gradient(top, rgba(149,149,149,1) 0%, rgba(13,13,13,1) 46%, rgba(1,1,1,1) 50%, rgba(10,10,10,1) 53%, rgba(78,78,78,1) 76%, rgba(56,56,56,1) 87%, rgba(27,27,27,1) 100%);
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(149,149,149,1)), color-stop(46%,rgba(13,13,13,1)), color-stop(50%,rgba(1,1,1,1)), color-stop(53%,rgba(10,10,10,1)), color-stop(76%,rgba(78,78,78,1)), color-stop(87%,rgba(56,56,56,1)), color-stop(100%,rgba(27,27,27,1)));
background: -webkit-linear-gradient(top, rgba(149,149,149,1) 0%,rgba(13,13,13,1) 46%,rgba(1,1,1,1) 50%,rgba(10,10,10,1) 53%,rgba(78,78,78,1) 76%,rgba(56,56,56,1) 87%,rgba(27,27,27,1) 100%);
background: -o-linear-gradient(top, rgba(149,149,149,1) 0%,rgba(13,13,13,1) 46%,rgba(1,1,1,1) 50%,rgba(10,10,10,1) 53%,rgba(78,78,78,1) 76%,rgba(56,56,56,1) 87%,rgba(27,27,27,1) 100%);
background: -ms-linear-gradient(top, rgba(149,149,149,1) 0%,rgba(13,13,13,1) 46%,rgba(1,1,1,1) 50%,rgba(10,10,10,1) 53%,rgba(78,78,78,1) 76%,rgba(56,56,56,1) 87%,rgba(27,27,27,1) 100%);
background: linear-gradient(to bottom, rgba(149,149,149,1) 0%,rgba(13,13,13,1) 46%,rgba(1,1,1,1) 50%,rgba(10,10,10,1) 53%,rgba(78,78,78,1) 76%,rgba(56,56,56,1) 87%,rgba(27,27,27,1) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#959595', endColorstr='#1b1b1b',GradientType=0 );
    margin:10px;
    padding:10px;
    width:50%;
    height:400px;
    position:relative;
}
.inside {
   width:98%;
    height:98%;
    background:white;
    position:absolute;
    left:1%;
    top:1%;
    
}