h1 {
		font-family: 'Baloo', serif;
		font-size: 48px;
		}
h4 {
		font-family: 'Baloo', serif;
		font-size: 32px;
		width: 200px;
		} 
	
button {
	position: relative;
	margin-top: 50px;
	}	

div.menu  {
	height: 300px;
	width: 200px;
}
div.footer::after{
	box-sizing: border-box;
	width: 50%;
	border: 5px solid green;
	float: left;
	transition: width .3s;
}

div.footer:hover::after {
	width: 100%;
	transition: width .3s;
}