body {
	margin: 0;
	padding: 0 10px;
	font-size: 16px;
	font-family: "Segoe UI", "Lucida Grande", "Bitstream Vera Sans", "Malgun Gothic", "Nanum Gothic", "Noto Sans CJK KR", "Apple SD Gothic Neo", "Microsoft JhengHei UI", "Noto Sans CJK TC", "PingFang TC", "Yu Gothic UI", "Noto Sans CJK JP", "Hiragino Kaku Gothic Pro", "TakaoPGothic";
}

a, a:link, a:active, a:visited {
	color: #004AC4;
	text-decoration: none;
	cursor: pointer;
}

a:hover {
	color: #004AC4;
	text-decoration: underline;
}

aside {
	margin: 20px auto;
	padding: 10px;
	max-width: 280px;
	border-width: 1px;
	border-style: solid;
	border-color: #A1A1A1;
	border-radius: 6px;
}

aside.youtube::before {
	display: block;
	content: "";
	margin-bottom: 10px;
	width: 147px;
	height: 32px;
	background-image: url("../images/youtube.png");
	background-repeat: no-repeat;
	background-position: center;
	background-size: 147px 32px;
}

aside.codinggicha::before {
	display: block;
	content: "";
	margin-bottom: 10px;
	width: 150px;
	height: 34px;
	background-image: url("../images/codinggicha.png");
	background-repeat: no-repeat;
	background-position: center;
	background-size: 150px 34px;
}

aside.gurumgicha::before {
	display: block;
	content: "";
	margin-bottom: 10px;
	width: 153px;
	height: 34px;
	background-image: url("../images/gurumgicha.png");
	background-repeat: no-repeat;
	background-position: center;
	background-size: 153px 34px;
}