JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent">
    <div class="title-bar">Title goes Here</div>
    <div class="sidecontent left">Some content</div>
    <div class="content">More content and more and more More content and more and more More content and more and more</div>
    <div class="sidecontent right">Some Content</div>
</div>

CSS

.title-bar {
    color: @color;
    background-color: @title-color;
    padding: 5px;
    font-family: @font-family;
    margin-bottom: 10px;
    font-size: 20px;
    text-align: center;
    border: 1px solid #D5D5D5;
    border-radius: 5px;
}
.left {
    float: left;
}
.right {
    float: right;
}
.sidecontent {
    width: 25%;
    border: 1px solid #D5D5D5;
    display: inline-block;
    //padding: 5px;
    vertical-align: top;
    height: 500px;
    background-color: red;
    overflow-y: auto;
}
.content {
    float: left;
    display: inline-block;
    vertical-align: top;
    width: 50%;
}