JSFiddle - React, Tailwind, and code Playground

HTML

<button class="accordion">Test</button>
<button class="accordion">Test</button>
<button class="accordion">Test</button>
<button class="accordion">Test</button>
<button class="accordion">Test</button>

CSS

.accordion {
   background-color: #eee !important;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    text-align: left;
    border: none;
    outline: none;
    transition: 0.4s;
}

.accordion:not(:last-child) {
  border-bottom: 1px solid black;
}