JSFiddle - React, Tailwind, and code Playground

HTML

<div class="page">
    <div class="intro"></div>
    <div class="content">
        <p>Content here</p>
    </div>
</div>

CSS

* {
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body,
.page {
    height: 100%;
}

.intro {
    position: relative;
    width: 100%;
    min-height: 100%;
    border: 0.5em dashed;
    overflow: hidden;
}

p {
    overflow: hidden;
}