body {
	width: 90%;
	max-width: 800px;
	margin: 0 auto;
}

ul {
	padding-left: 0;
	list-style-type: none;
}

#fixed-size-grid-items li {
	display: inline-block;
	vertical-align: text-top;
}

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

#stretchable-grid-items aside {
	display: inline-block;
	margin: 10%;
}

#stretchable-grid-items li {
	display: inline-block;
	width: 100%;
	vertical-align: text-top;
}

#stretchable-grid-items ul {
	margin: 1rem -10px;
}

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

@media screen and (min-width: 640px) {
	body{background-color: #eaf6ff;}
	h1{font-size: 2.5rem;}
	#stretchable-grid-items li {width: 25%;}
}

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