title: Border width percentage
body: <p>I am now using these codes to implement the borders on both sides of my page.</p>
  
  <pre><code>&lt;style&gt;
  body {
  border-left: 168px solid #F5E5D6;
  border-right: 168px solid #F5E5D6;
  }
  &lt;/style&gt;
  </code></pre>
  
  <p>It looks great with my screen resolution. Unfortunately, for the other resolution, the page will be deformed. So maybe know <strong>how to change "168px" to 9% of the screen?</strong></p>