JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#">Test</a>

CSS

a {
    -webkit-box-shadow: inset 0 0 30px #00f;
    -moz-box-shadow: inset 0 0 30px #00f;
    box-shadow: inset 0 0 30px #00f;
}

a {
    background: #aaa;
    display: block;
    width: 100px;
    height: 40px;
    padding-top: 20px;
    text-align: center
}