body{
	width: 90%;
	max-width: 800px;
	margin: auto;
}

@media screen and (min-width: 640px) {
	body{
		background-color:  #eaf6ff;
	}
}

@media screen and (max-width: 500px) {
	h1{
		font-size: 1.5rem;
	}
}

@media screen and (min-width: 640px) {
	h1{
		font-size: 2.5rem;
	}
}

li{
	display: inline-block;
	vertical-align: top;
}
#fixed-size-grid-items aside {
	width: 170px;
	margin: 10px;
	font-size: 0.8rem;
}

ul {
	list-style: none;
	padding-left: none;
	margin-left: -10px;
	margin-right: -10px;
	margin-top: 1rem;
	margin-bottom: 1rem;
}

#stretchable-grid-items li{
	width: 100%;
}

@media screen and (min-width: 480px) {
	#stretchable-grid-items li{
		width: 50%;
	}
}

@media screen and (min-width: 640px) {
	#stretchable-grid-items li{
		width: 25%;
		} 
	}
#stretchable-grid-items aside {
	margin: 10%;

}