body {
	overflow-y: scroll;
	margin: 0;
	color: #555;
	font-size: 18px;
}

img {
	max-width: 100%;
	height: auto;
}

dt {
	margin-top: 1em;
}

#header a,
#header {
	width: 100%;
	outline: none;
	color: #fff;
	background-color: #555;
	text-decoration: none;
	display: flex;
	justify-content: space-between;
}
#header #site-title {
	font-size: 1.4em;
	margin: 0;
	padding: 0.5em;
	font-family: serif;
}

#nav-top ul {
	margin: 0;
	padding: 0;
	display: box;
	display: -moz-box;
	display: -webkit-box;
	display: -ms-box;
	list-style: none;
}
#nav-top li {
	margin: 1em;
}
.article {
	padding: 1em;
}

@media screen and (max-width: 600px) {
	#header {
		display: grid;
	}
	#nav-top ul {
		display: grid;
	}
	.article {
		padding: 0.5em;
	}
}

@media screen and (max-width: 300px) {
	#header {
		display: grid;
	}
	#nav-top ul {
		display: grid;
	}
	.article {
		padding: 0;
	}
}
.article {
		max-width: 600px;
    margin: 0 auto;
}