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

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

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

#fixed-size-grid-items aside {
	width: 170px;
	margin: 10px;
	font-size:.8rem;
}
#fixed-size-grid-items li{
	display:inline-block;
	vertical-align: top;
	
}


#fixed-size-grid-items ul{
	list-style-type:none;
	margin:0;
	padding-left:0;
}

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

@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%;
}

#stretchable-grid-items ul{
	list-style-type:none;
	margin-left:-10px;
	margin-right:-10px;
	margin-top: 1rem;
	margin-bottom:1rem;
	padding-left:0;

}