how to bend border's of a div
<p>i have a div i want the border not to be flat but bended how to do it</p>

<p>Current div</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-css lang-css prettyprint-override"><code>div{
  height:100px;
  width:100px;
  background:#000;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div&gt;&lt;/div&gt;</code></pre>
</div>
</div>
</p>

<p>Here the border are flat i want it bended</p>