CSS3 box-shadow for overlapping-like divs

Question

I\'m trying to achieve this effect with css3:

The HTML code is

Answer 1

setting position to "relative" will already solve the problem!

Answer 2

I just had some luck using relative positioning.

For example.

1st div has a box-shadow, and a bottom margin. 2nd div slides up under the shadow.

#firstdiv {width: 960px; box-shadow: 5px 5px 5px #ccc; margin-bottom: 10px;}
#seconddiv {width: 960px; position: relative; top: -10px;}

It's not the best solution but it works for me.

Answer 3

This jsfiddle does what you want.

The way it works is with a main #wrap element that centres the content and creates a coordinate map for the absolutely positioned #main element. It does this because of its position: relative CSS rule. You end up with the following markup:

<div id="wrap">
    <header></header>
    <div id="main"></div>
</div>

The header is then placed inside of this and given position: relative and a z-index to set it stacking above the #main container.

Finally #main is absolutely positioned below the header. The CSS looks like so:

/* centre content and create coordinate map for absolutely positioned #main */
#wrap {
    width: 300px;
    margin: 20px auto;
    position: relative;
}

header, #main {
    background: #fff;

    /* rounded corners */
    border: 1px solid #211C18;
    border-radius: 5px;
    -moz-border-radius: 5px;
    -webkit-border-radius: 5px;    

    /* dropshadows */
    box-shadow: 2px 4px 20px #005377;
    -moz-box-shadow: 2px 4px 20px #005377;
    -webkit-box-shadow: 2px 4px 20px #005377;
}

header {
    display: block;
    width: 300px;
    height: 50px;

    /* stack above the #main container */
    position: relative;
    z-index: 2;
}

#main {
    width: 200px;
    height: 70px;

    /* stack below the header and underlap it...if that's even a word */
    position: absolute;
    z-index: 1;
    top: 40px;
    left: 50px;
}