JSFiddle - React, Tailwind, and code Playground

HTML

<div class="markBookPage">
    <div class="mbTop"> 
        Top 
    </div>

    <div class="mbContent">
        <div class="mbLeft"> 
            Left Menu

        </div>
        <div class="mbMain"> 
            Main Content

            <div id="mbTableRootContainer">
                <div id="mbTableLeftSide">

                </div>
                <div id="mbTableRightSide">

                </div>
            </div>
        </div>
    </div>
</div>

CSS

.markBookPage div
{
	-moz-box-sizing: border-box;
	-webkit-box-sizing: border-box;
	box-sizing: border-box;
}

.mbTop {
	border: solid black 1px;
	height: 2.5rem;
}

.mbContent {
	display: table;
	width: 100%;
	height: 600px;
}

.mbLeft {
	display: table-cell;
	border: solid black 1px;
	width: 15rem;
	
}

.mbMain {
	display: table-cell;
	border: solid black 1px;
}

#mbTableRootContainer {
	display: table;
	width: 100%;
	margin: 5px;
	height: 400px;
}

#mbTableLeftSide {
	display: table-cell;
	width: 12rem;
	border: solid black 1px;
}

#mbTableRightSide {
	display: table-cell;
	border: solid black 1px;
}


.mbTable {
	display: table;	
}
.mbTableRow {
	display: table-row;
}
.mbTableCell {
	display: table-cell;
}



.mbTableLeft {
	float: left;
    width: 15rem;
}

.mbTableRight {
   margin-left: 15rem;
}

.rowNameCell {
	margin: 0;
	width: 12rem;
	height: 1.2rem;
}


.headerWrapperWidth {
	
}

.headerContainer {
	overflow-x:hidden;
	white-space: nowrap;
}

.headerCell {
    display: inline-block;
    width: 8rem;
}

.mbTableContent {
	overflow: auto;
}

.mbTableCellContaner {
    display: inline-block;
    margin: 0;
	width: 8rem;
	height: 1.2rem;
}
.mbGridTextBox {
    width: 100%;
    height: 100%;
    margin: 0;
	resize: none;
}