JSFiddle - React, Tailwind, and code Playground

HTML

<div class="menu_style">
<span>......</span>
</div>

<br />

<div class="menu_style footer">
<footer><span>.......</span></footer>
</div>

CSS

.menu_style {
    display:block;
    padding: 20px;
    height: 20px;
    background: red;
}
.menu_style footer {
    background: blue;
    height: 20px;
    margin: -20px;
    padding: 20px; /* eventueel */
}