JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">
    Add a line item
    <div class="inner_wrap"><textarea></textarea></div>
</div>

CSS

body {
    background-color: #aaaaaa;
}

.wrap {
    border: 4px dashed #ff0000;
    height: 100px;
    text-align: center;
    line-height: 100px;
    font-size: 20px;
    font-family: Arial;
    position: relative;
}

.inner_wrap {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #919191;
    top: 0;
}