JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container container-table">
  <div class="vertical-center">
    <div class="row">
        [...]
    </div>
    <div class="row">
        [...]
    </div>
  </div>
</div>

CSS

html, body, .container-table {
    height: 100%;
}

.container-table {
    display: table;
}

.vertical-center {
    display: table-cell;
    vertical-align: middle;
}