JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper-main">
		<div class="container clear-fix">
			<div class="side-bar">
				<div class="block1">Side block</div>
				<div class="banners">Banner</div>
			</div>
			<div class="content">This is content</div>
		</div>
	</div>
	<div class="footer"></div>

CSS

body,html{
	margin:0;
	padding:0;
	height:100%;
	width:100%;
}

div {
    border:0px solid red;
}

.wrapper-main{
	width:100%;
	height: calc(100% - 101px);
    background-color: purple;
}

.footer{
	clear:both;
    height:101px;
	background: blue;
}
.container {
    height:100%;
}
.content{
    float:left;
	width:75%;
	height:100%;
	background:green;
}

.side-bar{
	float:right;
	width:25%;
	background:#d5cdcd;
	height:100%;
}


.clear-fix:before,
.clear-fix:after{
	display:block;
	height:0;
	content:'';
}
.clear-fix:after{
    clear:both;
}