* {
	padding: 0;
	margin: 0;
}

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;
	}
}
#fixed-size-grid-items aside {
	box-sizing: border-box;
	float: left;
	width: 170px;
	margin: 10px;
	font-size: 0.8rem;
}
#fixed-size-grid-items li {
	display: inline-block;
	list-style: none;
}
#fixed-size-grid-items ul {
	padding: 0;
}

#stretchable-grid-items li {
	list-style: none;
	display: inline-block;
	width: 100%;
}
#stretchable-grid-items aside {
	box-sizing: border-box;
	float:left;
	margin: 10%;
	font-size: 0.8rem;
}
#stretchable-grid-items ul {
	margin-left:  -10px;
	margin-right: -10px;
	margin-top: 1rem;
	margin-bottom: 1rem;
	padding: 0;
}

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

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