JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
<li>A</li>
<li>B</li>
<li>C</li>
<li>D</li>
</ul>

CSS

ul { 
  padding: 0; 
  margin: 0;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}
li {
  display: flex;
  margin: 1px;
  padding: 5px;
  background: #aaa;
}
li:last-child {
  background: #ddd;
  /* magic to throw to the right*/
  
}