<div class="header">
header
</div>

<div class="content">
content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	content <br />
	
</div>

<div class="footer">
footer
</div>
* {
	padding: 0;
	margin: 0;
}

html, body {
	height: 100%;
	display: flex;
	flex-direction: column;
}

.header {
	background: green;
	padding: 20px;
}

.content {
	background: yellow;
	flex: 1;
	padding: 20px;
	overflow: auto;
}

.footer {
	background: #ddd;
	padding: 20px;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.