JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//malihu.github.io/custom-scrollbar/jquery.mCustomScrollbar.concat.min.js"></script>
<link rel="stylesheet" href="//malihu.github.io/custom-scrollbar/jquery.mCustomScrollbar.min.css">
<script src="//malihu.github.io/custom-scrollbar/mCSB_buttons.png"></script>
<!DOCTYPE>

<html>

<head>
    <meta charset="utf-8" />
    <title></title>
    <link rel="stylesheet" type="text/css" href="styles.css" />
    <link rel="stylesheet" href="jquery.mCustomScrollbar.css" />
    <script src="javascript/jquery.mCustomScrollbar.concat.min.js"></script>
</head>
    
<body>
    <div class="wrapper" >
        
        
        
        <div class="left-cell cell" align="left">
            <div class="step-container">
                <div class="content-box">
                        <div class="content-image" style="background-image: url(http://simeonhookphotography.com/wp-content/gallery/favorites/norway-countryside-to-bergen.jpg);"></div>
                        <div class="content-text mCustomScrollbar"
                             ><h6>What is Lorem Ipsum</h6><p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</p></div>
                    </div>

                
                <div class="notch-outer-container">
                    <div class="notch-inner-container">
                        <div class="right-face-notch notch"></div>
                    </div>
                </div>
                

                <div...

CSS

.wrapper {
    height:100%;
    width: 95%;
    margin: 10px auto;
    display: table;
    background-color:teal;
}

.cell {
    display:table-cell;
    vertical-align: top;
}

.left-cell {
    width:50%
}

.middle-cell {
    height:100%;
    background-color: white;
    width:1.5px;
    font-size: 0;
    box-shadow: 0px 50px 10px black;
    -moz-box-shadow: 0px 50px 10px black;
    -webkit-box-shadow: 0px 50px 10px black;
}

.right-cell {
   /* width:50%*/ /*Commenting b/c both right and left 50, 50 squish and vanish the middle between them*/
    background-color: blueviolet
}



.step-container {
    max-height: 200px;
    font-size: 0;
}

.right-cell .step-container {
    margin-top:100px;
}



.content-box {
    display: inline-block;
    width: 170px;
    height: 200px;
    /*border: 5px solid blue;*/
    font-size: 0;
}

.content-box .content-image {
    width:35%;
    height:100%;
    background-size: cover;
    display: inline-block
}

.content-box .content-text {
    background-color: rgb(255, 255, 255);  
    color: #1c1a1a;
    font-family: sans-serif;
    font-size: 15px;
    font-weight: 100;
    overflow:auto;
    display: inline-block;
    width:65%;
    height:100%;
}

.notch-outer-container {
    display:inline-block;
}

.left-cell .notch-outer-container {
    margin-right: 3px;
}

.right-cell .notch-outer-container {
    margin-left: 3px;
}

.notch-inner-container {
    height:200px;
    display:flex;
    flex-direction: column;
    justify-content: center;
}

.notch {
    width: 0; 
	height: 0; 
	border-top: 15px solid transparent;
	border-bottom: 15px solid transparent;
}

.right-face-notch {
	border-left: 15px solid brown;
}

.left-face-notch {
    border-right: 15px solid brown;
}

.number-outer-container {
    display:inline-block;
    position:absolute;
}

.left-cell .number-outer-container {
    left:47.5%;
}

.right-cell .number-outer-container {
    right:48%;
}

.number-inner-container {
    height:200px;
    display:flex;
   ...

JavaScript

(function($){
    $(window).load(function(){

        $("content-text").mCustomScrollbar({
            theme:"minimal"
        });

    });
})(jQuery);

/*
Produces the following JSLint errors:

11	Expected exactly one space between 'function' and '('.	(function($){
11	Expected exactly one space between ')' and '{'.	(function($){
11	Missing space between ')' and '{'.	(function($){
12	Missing 'use strict' statement.	$(window).load(function(){
12	Expected exactly one space between 'function' and '('.	$(window).load(function(){
12	Expected exactly one space between ')' and '{'.	$(window).load(function(){
12	Missing space between ')' and '{'.	$(window).load(function(){
15	Missing space between ':' and 'minimal'.	theme:"minimal"
19	Move the invocation into the parens that contain the function.	})(jQuery);
19	'jQuery' was used before it was defined.	})(jQuery);
*/