body {
	font-family: 'Noto Sans KR', sans-serif;
}
video {
	/* override other styles to make responsive */
	width: 80%    !important;
	height: auto   !important;
}
iframe {
	width: 80%    !important;
	height: 1400px   !important;
}
a:visited {
	color: black;
	text-decoration: none;
}
h2 {
	text-align: center;
}
h3 {
	text-align: center;
}
h4 {
	text-align: center;
}
hr {
	width:80%;
}
#return-to-top {
	position: fixed;
	bottom: 20px;
	right: 20px;
	background: rgb(0, 0, 0);
	background: rgba(0, 0, 0, 0.7);
	width: 50px;
	height: 50px;
	display: block;
	text-decoration: none;
	-webkit-border-radius: 35px;
	-moz-border-radius: 35px;
	border-radius: 35px;
	display: none;
	-webkit-transition: all 0.3s linear;
	-moz-transition: all 0.3s ease;
	-ms-transition: all 0.3s ease;
	-o-transition: all 0.3s ease;
	transition: all 0.3s ease;
}
#return-to-top i {
	color: #fff;
	margin: 0;
	position: relative;
	left: 16px;
	top: 13px;
	font-size: 19px;
	-webkit-transition: all 0.3s ease;
	-moz-transition: all 0.3s ease;
	-ms-transition: all 0.3s ease;
	-o-transition: all 0.3s ease;
	transition: all 0.3s ease;
}
#return-to-top:hover {
	background: rgba(0, 0, 0, 0.9);
}
#return-to-top:hover i {
	color: #fff;
	top: 5px;
}