JSFiddle - React, Tailwind, and code Playground

HTML

<div class="banner"></div>
<div class="menu"></div>

CSS

.banner {
    margin: 0px auto;
    width: 300px;
    height: 150px;
    background: #900;
}
.menu {
    margin: 0px auto;
    width: 300px;
    height: 80px;
    background: #090;
}