@charset "utf-8";

* {
	margin: 0;
	padding: 0;
}

body {
	padding: 0px;
	margin: 0px;
	overflow: visible;
	font-family: メイリオ, Meiryo, arial, "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", Osaka, "ＭＳ Ｐゴシック", "MS PGothic", Sans-Serif;
	font-size: 16px;
	line-height: 1.5;
	background-color: #000066;
	color: #333;
	background-image: url('../index/background.gif');
}

a:link {
	color: blue
}

a:visited {
	color: purple
}

a:hover {
	color: #f00
}

#container {
	background-position: 0px 0px;
	width: 640px;
	height: auto;
	margin-right: auto;
	margin-left: auto;
	background-color: #FFFFFF;
	padding: 110px 20px 20px 20px;
	text-align: center;
	background-repeat: no-repeat;
	background-image: url('../index/head_image.jpg');
	box-sizing: border-box;
}

ul {
	list-style: none;
	margin-bottom: 1.5rem;
}

#midi {
	margin: 10px auto 10px auto;
	width: 600px;
	height: auto;
	text-align: right;
	padding-top: 10px;
	border-top-style: solid;
	border-top-width: 1px;
	border-top-color: #666;
}

#updated {
	margin: 10px auto 10px auto;
	width: 600px;
	height: auto;
	text-align: right;
	padding-top: 10px;
	border-top-style: solid;
	border-top-width: 1px;
	border-top-color: #666;
}

#topics_box {
	padding: 30px;
	width: 540px;
	height: auto;
	margin-right: auto;
	margin-left: auto;
	margin-top: 10px;
	background-color: #f5f5dc;
	text-align: center;
}

#topics_title {
	width: 540px;
	height: auto;
	margin-right: auto;
	margin-left: auto;
	margin-bottom: 5px;
	text-align: left;
}

#past_box {
	padding: 30px;
	width: 540px;
	height: auto;
	margin-right: auto;
	margin-left: auto;
	margin-top: 10px;
	background-color: #fff;
	text-align: left;
}

#under_box {
	padding: 30px;
	width: 540px;
	height: auto;
	margin-right: auto;
	margin-left: auto;
	margin-top: 10px;
	background-color: #fff;
	text-align: left;
	position: relative;
	border-top-style: dotted;
	border-top-width: 1px;
	border-top-color: #666;
}

#footer {
	margin: 10px auto 10px auto;
	width: 600px;
	height: auto;
	text-align: center;
	padding-top: 10px;
	border-top-style: solid;
	border-top-width: 1px;
	border-top-color: #666;
}

.topics {
	margin: 2rem auto;
	width: 450px;
	height: auto;
	text-align: left;
}

.date {
	margin: 30px auto 10px 100px;
	width: 400px;
	height: auto;
	text-align: left;
}

.red_bold {
	font-weight: bold;
	color: #F00;
}

.green_bold {
	font-weight: bold;
	color: #090;
}

.br-sp {
	display: none;
}

.br-pc {
	display: block;
}


@media screen and (max-width: 479px) {

	/*ウィンドウ幅が最大479pxまでの場合に適用*/
	body,
	#container,
	#updated,
	#topics_box,
	#topics_title,
	.topics,
	#past_box,
	#under_box,
	#footer {
		width: 100%;
		box-sizing: border-box;
	}

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

	#topics_box {
		padding: 0.5em;
	}

	.topics {
		width: 100%;
		height: auto;
		margin: 1rem 0;
	}

	.date {
		margin: 0;
		width: 100%;
		height: auto;
	}

	.br-sp {
		display: block;
	}

	.br-pc {
		display: none;
	}

}