title: Right sidebar overlapping page border
body: <p>I have following right sidebar which overlapping page border when browse resize,
  I need position to be fixed so stays fixed when scrolling page, I searched stack for hours, tried different options but no success, not sure maybe media query can help here:</p>
  
  <pre><code>&lt;div class="block-cat" style="background: #f3f3f3; padding: 20px; position: fixed; width:20%"&gt;
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/5uxRI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5uxRI.png" alt="enter image description here"></a></p>