body {
	background-color:#ffffff;
	font-family:sans-serif;
	-webkit-text-size-adjust:100%;
	font-size:1.0em;
	margin:0;
	padding:0;
}

header, footer {
	background-color:#ffffff;
	text-align:center;
	padding:1.0em;
}

nav {
	margin-top:1em;
}

nav a {
	text-decoration: none;
	padding:0em 0.5em;
	margin:0;
	font-size:1.1em;
	font-weight:bold;
	display:inline-block;
}

nav a:link {
	color:#546474;
}

nav a:visited {
	color:#546474;
}

nav a:active {
	color:#546474;
}

nav a:hover {
	color:#546474;
}

main {
	padding:1.0em;
}

.container {
	max-width:960px;
	margin: 0 auto;
}

h1 {
	font-size:1.1em;
	color:#000000;
	margin-bottom:0.5em;
  	padding-left:1.0em;
  	padding-right:1.0em;
	text-align: center;
}

h2 {
	font-size:1.0em;
	background-color:#e0e0e0;
	line-height:1.8em;
	padding-left:1.0em;
	margin-top:1.0em;
	margin-bottom:1.0em;
}

h3 {
	font-size:1.0em;
	line-height:1.2em;
	padding-left:1.0em;
	margin-top:1.0em;
	margin-bottom:0.5em;
}

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

summary {
	margin-left:1.5em;
}

p {
	margin-left:1.0em;
	margin-right:1.0em;
	margin-top:1.0em;
	margin-bottom:1.0em;
	line-height:1.6em;
}

ul.mark {
	margin-left:3em;
	margin-right:1em;
	padding-left:0;
	line-height:1.6em;
}

ul.mark li {
	list-style-type:square;
	padding-bottom:0.2em;
}

ul.mark_none {
	margin-left:1.5em;
	margin-right:1em;
	padding-left:0;
	line-height:1.6em;
}

ul.mark_none li {
	list-style-type:none;
	padding-bottom:0.2em;
}

ul.number {
	margin-left:3em;
	margin-right:1em;
	padding-left:0;
	line-height:1.6em;
}

ul.number li {
	list-style-type:decimal;
	padding-bottom:0.2em;
}

table.tab {
	border-collapse:collapse;
	font-size:0.9em;
}

table.tab th {
	padding:0.3em;
	text-align:center;
	vertical-align:top;
	color:#333333;
	background-color:#eeeeee;
	border:1px solid #b9b9b9;
}

table.tab td {
	padding:0.3em;
	background-color:#ffffff;
	border:1px solid #b9b9b9;
}

a:link {
	text-decoration:none;
	color:#1A0DAB;
}
a:visited {
	text-decoration:none;
	color:#1A0DAB;
}
a:hover {
	text-decoration:underline;
	color:#1A0DAB;
}
a:active {
	text-decoration:none;
	color:#1A0DAB;
}

.youtube {
	width: 100%;
	aspect-ratio: 16 / 9;
	margin-left: auto;
	margin-right: auto;
}

.youtube iframe {
	width: 100%;
	height: 100%;
}

@media screen and (min-width: 576px) {
.youtube {
	width: 70%;
	aspect-ratio: 16 / 9;
	margin-left: auto;
	margin-right: auto;
}

.youtube iframe {
	width: 100%;
	height: 100%;
}

h1 {
	font-size:1.2em;
	color:#000000;
	margin-bottom:0.5em;
  	padding-left:1.0em;
  	padding-right:1.0em;
	text-align: center;
}

}