JSFiddle - React, Tailwind, and code Playground

HTML

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

CSS

.container {
    margin: 0px auto;
    width: 400px;
    background: 009;
}
.banner {
    width: 400px;
    height: 150px;
    background: #900;
}
.menu {
    width: 150px;
    height: 80px;
    background: #090;
}