JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="item">Words!</div>
    <input type="submit" class="item">
</div>

CSS

.wrapper {
    display: table;
    border-collapse: separate;
    width: 100%;
    table-layout: fixed;
    border-spacing: 15px;
    border: 1px solid red;
}

.item {
    display: table-cell;
    width: 50%;
    background: aliceBlue;
    border: 1px solid black;
}

input.item {
    /*width: 100%*/
}