JSFiddle - React, Tailwind, and code Playground

HTML

<div class="flexbox">

<div class="item">
<div class="title">
Title
</div>
<div class="content">
Content
</div>
<div class="author">
Author
</div>
</div>

<div class="item">
<div class="title">
Title
</div>
<div class="content">
Content<br>Content
</div>
<div class="author">
Author
</div>
</div>

<div class="item">
<div class="title">
Title
</div>
<div class="content">
Content<br>Content<br>Content
</div>
<div class="author">
Author
</div>
</div>


</div>

CSS

.flexbox{
  display:flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.item{
  display:flex;
  flex-direction: column;
  width: 100px;
  border: 1px solid #000;
  padding: 10px;
}

.item .author{
  width:100%;
  align-self: flex-end;
  border: 1px solid #000;
}