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


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


li{
	list-style-type: none;
	display: inline-block; 
	}




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

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

#stretchable-grid-items li {
	width:100%;
	font-size:0.8rem;
	margin:0;
	}





@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;
	}
}