JSFiddle - React, Tailwind, and code Playground

HTML

<section>
    <aside>
        aaaaaa
    </aside>
    <article>
        bbbbbb
    </article>
</section>

<section>
    <article>
        bbbbbb
    </article>
</section>

CSS

section {
    width: 100%;
	max-width: 960px;
}

article {
	overflow: hidden;
	border: 1px solid blue;
}

aside {
	float: right;
	width: 320px;
    border: 1px solid red;
}