How to Create Shadows on All Sides of an Element Except One in CSS3?

Creating Shadows on All Sides but One in CSS3

In the realm of digital design, shadows play a crucial role in enhancing depth and visual appeal. This question delves into a specific challenge: crafting CSS3 shadows on all sides of an element but one.

The goal is to create a tabbed navigation bar where the open tab stands out with a shadow, while the entire tab section casts a shadow underneath all tabs except the open one. To achieve this, we'll explore the CSS3 box-shadow property.

The key to selectively shading the desired areas lies in positioning. The solution involves wrapping the content under the active tab in a div with a solid background, concealing the bottom shadow of that tab. Additionally, the "#content" element receives a shadow encompassing all the tabs, except for the active one.

To summarize the CSS code:

<code class="css">#content_over_shadow {
    position: relative;
    background: #fff;
}

#content {
    box-shadow: 0 0 8px 2px #888;
}

#nav li a {
    position: relative;
    box-shadow: 0 0 8px 2px #888;
}</code>

This approach effectively casts shadows on all sides but the desired one, creating a visually distinctive and functionally effective tabbed navigation bar.

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