JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    Topo absoluto com função 'top'
</div>

CSS

div {
    width: 200px;
    height: 50px;
    margin-left: -100px; /* metade da largura */
    margin-top: 0px; /* metade da altura */
    position: absolute;
    top: 0%;
    left: 50%;
    border: 1px solid blue;
}