====== CSS: Box shadow ======
Adding a simple shadow to any rectangle shaped object is quite easy. Here is how to do it cross-browser.
<code css>
.shadow {
-moz-box-shadow: 3px 3px 5px 6px #ccc;
-webkit-box-shadow: 3px 3px 5px 6px #ccc;
box-shadow: 3px 3px 5px 6px #ccc;
}
</code>
  - The horizontal offset of the shadow, positive means the shadow will be on the right of the box, a negative offset will put the shadow on the left of the box.
  - The vertical offset of the shadow, a negative one means the box-shadow will be above the box, a positive one means the shadow will be below the box.
  - The blur radius (optional), if set to 0 the shadow will be sharp, the higher the number, the more blurred it will be.
  - The spread radius (optional), positive values increase the size of the shadow, negative values decrease the size. Default is 0 (the shadow is same size as blur).
  - Color
  - You can put 'inset' after the color definition to make the shadow an inner shadow