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+<h1>Better Box Shadows</h1>
+<p>2019-01-08</p>
+<p><style>
+ .message {
+ position: relative;
+ z-index: 1;
+ }
+ .box-container,
+ .box-container-depth {
+ background: white;
+ box-shadow: 0 4px 8px rgba(0,0,0,0.3);
+ border: 1px solid #eee;
+ border-radius: 10px;
+ margin: 2rem auto;
+ padding: 10px;
+ position: relative;
+ height: 200px;
+ width: 250px;
+ }
+ .box-container-depth { box-shadow: none; }
+ .box-container-depth .box-container-depth-inner {
+ bottom: 0;
+ box-shadow: 0 4px 12px rgba(0,0,0,0.3);
+ content:'';
+ position: absolute;
+ width: 94%;
+ height: 94%;
+ left: 3%;
+ z-index: -1;
+ }
+ .box-container-depth-inner.blur {
+ filter: blur(6px);
+ }
+</style></p>
+<p>Box shadow on <abbr title="hypertext markup language">HTML</abbr> elements has been widely supported across most browsers for a while now, but I find the default options don't allow for much visual manipulation of the shadows in general.</p>
+<p>Let's take a look at a default configuration of <code>box-shadow</code>:</p>
+<pre><code>.box-container {
+ box-shadow: 0 4px 8px rgba(0,0,0,0.3);
+}
+</code></pre>
+<p>In the example above the first property number is the origin of the <em>x-axis</em>, the second number is the origin of the <em>y-axis</em> and the third is the amount of <em>blur</em>.</p>
+<p>We should also add some minimal styling to cleanup the <code>.box-container</code> a little bit for our example:</p>
+<pre><code>&lt;div class=&quot;box-container&quot;&gt;&lt;/div&gt;
+</code></pre>
+<pre><code>.box-container {
+ box-shadow: 0 4px 8px rgba(0,0,0,0.3);
+ /* Styles to make it less ugly */
+ background: white;
+ border-radius: 10px;
+ border: 1px solid #eee;
+ height: 200px;
+ padding: 10px;
+ position: relative;
+ width: 250px;
+}
+</code></pre>
+<p>Which would render as this:</p>
+<p><div class="box-container"></div></p>
+<p>Not bad - but we can do a lot better than this.</p>
+<h2>Please sir, I want some more (depth)</h2>
+<p>We just need to add a simple child <code>div</code> (or use a <code>pseudo</code> element if you prefer) inside our main element we want to apply the shadow to:</p>
+<pre><code>&lt;div class=&quot;box-container&quot;&gt;
+ &lt;div class=&quot;box-container-inner&quot;&gt;&lt;/div&gt;
+&lt;/div&gt;
+</code></pre>
+<p>Now we make our inner child element <code>absolute</code> and set it's <code>height</code> and <code>width</code> dynamically to be slightly smaller than it's parent (percentages work best for this). </p>
+<p>Remember to set this child element behind it's parent by adding <code>z-index: -1</code>.</p>
+<pre><code>.box-container {
+ /* No box-shadow needed on this element anymore */
+ /* Styles to make it less ugly */
+ background: white;
+ border-radius: 10px;
+ border: 1px solid #eee;
+ height: 200px;
+ padding: 10px;
+ position: relative;
+ width: 250px;
+}
+</code></pre>
+<h2>Inner Containers</h2>
+<p>We also need to target the <code>box-container-inner</code> element set inside the current parent to reflect our custom shadow styling:</p>
+<pre><code>.box-container-inner {
+ bottom: 0;
+ /* The box-shadow is added here now */
+ box-shadow: 0 4px 12px rgba(0,0,0,0.3);
+ height: 94%;
+ left: 3%;
+ position: absolute;
+ width: 94%;
+ z-index: -1;
+}
+</code></pre>
+<p>Which will make the drop-shadow render with a little more realistic depth:</p>
+<p><div class="box-container-depth"><span class="box-container-depth-inner"></span></div></p>
+<h2>But wait - there's more!</h2>
+<p>We could stop now and have a decent drop-shadow that is certainly easier on the eyes - but we can make this even better with one extra property - <code>filter:blur();</code>. </p>
+<p>So your final code would look like this:</p>
+<pre><code>.box-container {
+ /* Styles to make it less ugly */
+ background: white;
+ border-radius: 10px;
+ border: 1px solid #eee;
+ height: 200px;
+ padding: 10px;
+ position: relative;
+ width: 250px;
+}
+
+.box-container-inner {
+ bottom: 0;
+ box-shadow: 0 4px 12px rgba(0,0,0,0.3);
+ filter: blur(6px);
+ height: 94%;
+ left: 3%;
+ position: absolute;
+ width: 94%;
+ z-index: -1;
+}
+</code></pre>
+<p>Which renders out into a much smoother blend of a drop-shadow, creating a more realistic illusion of depth:</p>
+<p><div class="box-container-depth">
+ <span class="box-container-depth-inner blur"></span>
+</div></p>
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