CSS – Webpage Top Box Shadow
Display a dark drop shadow fading down from the top of your webpage.

The Source Code to copy/paste:

    body:before {  
        content: "";  
        position: fixed;  
        top: -10px;  
        left: 0;  
        width: 100%;  
        height: 10px;  
      
        -webkit-box-shadow: 0px 0px 10px rgba(0,0,0,.8);  
        -moz-box-shadow: 0px 0px 10px rgba(0,0,0,.8);  
        box-shadow: 0px 0px 10px rgba(0,0,0,.8);  

        z-index: 100;  
    }

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