JSFiddle - React, Tailwind, and code Playground

HTML

<div class="left">
<h2>Home</h2>
</div>

<div>
  <div class="sidebar_container"  style="float: right;">       
        <div class="sidebar">
      <h2>Post 1</h2>
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi fringilla vulputate mauris fermentum laoreet. Suspendisse lacinia tincidunt lectus... 
      <a href="#">Read More</a>

      </p>
    </div>          
      <div class="sidebar">
      <h2>Post 2</h2>
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi fringilla vulputate mauris fermentum laoreet. Suspendisse lacinia tincidunt lectus.. <a href="#">Read More</a></p>
    </div>
      <div class="sidebar">
      <h2>Post 3</h2>
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi fringilla vulputate mauris fermentum laoreet. Suspendisse lacinia tincidunt lectus, in iaculis neque aliquam vitae. Ut mattis aliquet mi, eu cursus est placerat id. Donec vehicula lorem neque, vel mattis arcu semper in...<a href="#">Read More</a></p>
    </div><!--close sidebar-->  

  </div>
  
<div class="left">

        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi fringilla vulputate mauris fermentum laoreet. Suspendisse lacinia tincidunt lectus, in iaculis neque aliquam vitae. Ut mattis aliquet mi, eu cursus est placerat id. Donec vehicula lorem neque, vel mattis arcu semper in. Aenean venenatis pulvinar sagittis. In eget congue sapien, in semper ligula. Curabitur sagittis mi a lacinia fermentum. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi eu enim a mauris ullamcorper tincidunt ac vel erat. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Phasellus lacinia, velit eu eleifend interdum, lacus velit maximus nisi, ut feugiat metus metus in mauris. Nunc molestie libero quis odio tristique euismod.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi fringilla vulputate mauris fermentum laoreet. Suspendisse lacinia tincidunt...

CSS

.sidebar_container{ 
    float: right;
    width: 70%;
    max-width: 230px;
    margin: 0px 20px 20px 0;
    min-width: 300px;
    /*I can add a min-height until the side column is long enough to reach the entire bottom rather than end after the content runs out, but it doesn't adjust accordingly (to the length of the body column, whether the screen makes the body longer or the amount of text makes the body longer)*/
  }

  .left {
    overflow:hidden
    width: 70%;
    line-height: 2;
    font-size: 18px;
  }