Utilities for controlling the box shadow of an element.
<style>
#box-shadow-table > tr td:nth-child(3) {
position: relative;
}
#box-shadow-table > tr {
height: 100px;
}
#box-shadow-table tr td:nth-child(3) div {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
margin: 1rem;
}
</style>
<table style="display: table;">
<thead>
<tr>
<th style="text-align: center;">Class</th>
<th style="text-align: center;">Properties</th>
<th style="text-align: center;">Preview</th>
</tr>
</thead>
<tbody id="box-shadow-table">
<tr><td>shadow-2xs</td><td>box-shadow: 0 1px rgb(0 0 0 / 0.05);</td><td><div style="box-shadow: 0 1px rgb(0 0 0 / 0.05);"></div></td></tr>
<tr><td>shadow-xs</td><td>box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);</td><td><div style="box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);"></div></td></tr>
<tr><td>shadow-sm</td><td>box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);</td><td><div style="box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);"></div></td></tr>
<tr><td>shadow-md</td><td>box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);</td><td><div style="box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);"></div></td></tr>
<tr><td>shadow-lg</td><td>box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);</td><td><div style="box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);"></div></td></tr>
<tr><td>shadow-xl</td><td>box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);</td><td><div style="box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);"></div></td></tr>
<tr><td>shadow-2xl</td><td>box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);</td><td><div style="box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);"></div></td></tr>
<tr><td>shadow-none</td><td>box-shadow: 0 0 #0000;</td><td><div style="box-shadow: 0 0 #0000;"></div></td></tr>
<tr><td>inset-shadow-2xs</td><td>box-shadow: inset 0 1px rgb(0 0 0 / 0.05);</td><td><div style="box-shadow: inset 0 1px rgb(0 0 0 / 0.05);"></div></td></tr>
<tr><td>inset-shadow-xs</td><td>box-shadow: inset 0 1px 1px rgb(0 0 0 / 0.05);</td><td><div style="box-shadow: inset 0 1px 1px rgb(0 0 0 / 0.05);"></div></td></tr>
<tr><td>inset-shadow-sm</td><td>box-shadow: inset 0 2px 4px rgb(0 0 0 / 0.05);</td><td><div style="box-shadow: inset 0 2px 4px rgb(0 0 0 / 0.05);"></div></td></tr>
<tr><td>inset-shadow-none</td><td>box-shadow: inset 0 0 #0000;</td><td><div style="box-shadow: inset 0 0 #0000;"></div></td></tr>
</tbody>
</table>
### Arbitrary values
Any [`<shadow>`](crate::utils::value_matchers::is_matching_shadow) property is allowed as arbitrary value.
For example, `shadow-[2px_1px_20px_2px_rgb(12_12_42)]` or `inset-shadow-[0_2px_2px_rgb(0_0_0_/_0.1)]`.
[Tailwind reference](https://tailwindcss.com/docs/box-shadow)