html,
body{
	max-width: 800px;
	width:90%;
	text-align: center;
	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: 760px){
	h1{
		font-size: 2.5rem; 
	}
}
#fixed-size-grid-items aside{
	width:170px;
	margin:10px;
	font-size: 0.8rem;
	display: inline-block;
	padding-left: 0;
	text-align: center;
}
#fixed-size-grid-items ul{
	padding-left: 0;
	list-style: none;
	display: inline-block;
	text-align: center;
}
#fixed-size-grid-items li{
	display: inline-block;
}
#stretchable-grid-items aside{
	margin: 10%;
	display: inline-block;
	padding-left: 0;
}
#stretchable-grid-items li{
	width:100%;
	display:inline-block;
}
#stretchable-grid-items ul{
	margin-left: :-10px;
	margin-right: -10px;
	margin-top: 1rem;
	margin-bottom: 1rem;
}
@media screen and (min-width: 480px){
	#stretchable-grid-items li{
		width:50%;
		display: inline-block;}

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