JSFiddle - React, Tailwind, and code Playground

HTML

<header>
    <p>Lorem ipsum</p>
</header>

<section>
    <aside id="left">
        <p>Lorem ipsum</p>
    </aside>
    
    <article>
        <p>Lorem ipsum</p>
    </article>
    
    <aside id="right">
        <p>Lorem ipsum</p>
    </aside>
</section>

<footer>
    <p>Lorem ipsum</p>
</footer>

CSS

* {
    margin: 0;
    padding: 0;
    height: 80%; /* Nur zur Demonstration */
}
header, footer {
    background-color: red;
    padding: 0 10%;
    height: 20px;
}

section {
    background-color: gray;
    width: 80%;
    margin: 0 auto;
}

aside {
    background-color: lightblue;
    width: 20%;
}
aside#left {
    float: left;
}
aside#right {
    float: right;
}

article {
    background-color: blue;
    width: 60%;
    float: left;
}
footer {
    clear: both;
}