title: Button with rounded bottom border
body: <p>I'm wondering if it is possible to create button looks like this:</p>
  
  <p><img src="https://i.stack.imgur.com/XLeUs.png" alt="enter image description here"></p>
  
  <p>With <strong>CSS only</strong> (no additional images).</p>
  
  <p>What do you think?</p>