JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">

  <button class="item">Item</button>
  <button class="item">Item</button>
  <button class="item">Item</button>
</div>

CSS

.container .item{
    background-color: lightgreen;
    display:inline-block;
    margin:0 -4px 0 0;
    padding:10px;
}