@charset "utf-8";
/* CSS Document */

section#introduce article {
	margin-bottom: calc(40 / 920 * 100%);
}
section#introduce article:after {
	content: "";
	clear: both;
	display: block;
}
section#introduce article h1 {
	height: 32px;
	padding: 8px 0px;
	color: white;
	font-size: 32px;
	background-color: #00523a;
	text-align: center;
}
section#introduce div {
	margin-top: 40px;
	font-size: 21px;
}
section#introduce .box_sentence {
	width: calc(380 / 920 * 100%);
	padding: 0px 4px;
	box-sizing: border-box;
	float:left;
}
section#introduce .box_image {
	width: calc(500 / 920 * 100%);
	box-sizing: border-box;
	float:left;
}
section#introduce div {
	margin-bottom: calc(40 / 920 * 100%);
}
section#introduce div:nth-of-type(odd) {
	margin-right: calc(40 / 920 * 100%);
}
section#introduce div:nth-of-type(even) {
	margin-right: 0px;
}
section#introduce .box_sentence h3 {
	color: #00523a;
	font-size: 24px;
	margin-bottom: calc(24 / 920 * 100%);
	background-color: #ffffff;
	text-align: left;
}
section#introduce hr {
	margin: 0px 2px;
  border-top: 1px dashed #bbb;
  border-bottom: 1px dashed #fff;
}
section#introduce article.reversal {
	color : white;
	margin-bottom: calc(40 / 920 * 100%);
	padding-top: calc(40 / 920 * 100%);
	background-color: #00523a;
}
section#introduce article.reversal h1 {
	padding: 8px 0px;
	color: white;
	background-color: #000000;
	text-align: center;
}
section#introduce article.reversal .box_sentence h3 {
	color: #ffffff;
	background-color: #00523a;
}

section#lesson > h1 {
	height: 32px;
	font-size: 32px;
	margin: 15px 0px;
	color: #0a523b;
}

section#lesson table {
	margin-bottom: 40px;
	border-collapse: collapse;
	font-size: 18px;
}
section#lesson table thead th, section#lesson table td {
	border: 3px solid #ffffff;
	padding: 4px;
	text-align: center;
	vertical-align: middle;
}
section#lesson table thead th{
	color: #ffffff;
	background-color: #00523a;
}
section#lesson table tbody tr:nth-of-type(odd) td {
	color: #000000;
	background-color: #b7dccb;
}
section#lesson table tbody tr:nth-of-type(even) td {
	color: #000000;
	background-color: #8cc897;
}
section#lesson dl * {
	font-size: 18px;
}
section#lesson dl.bullet > dt:before {
	content: "■";
}
section#lesson dl.bullet > dd{
	margin-left: 1.5rem;
}
section#lesson dl.colon dt, section#lesson dl.colon dd {
	display: inline-block;
}
section#lesson dl.colon dt {
	width: 9em;
}
section#lesson dl.colon dd:before {
	content: "：";
}

.subtitle b {
	width: 100%;
	height: 100%;
	background-size: contain;
	background-position: center;
	background-repeat: no-repeat;
	display: block;
}

#subtitle01 b {
	background-image: url(/images/piano/subtitle01.png);
}
#subtitle02 b {
	background-image: url(/images/piano/subtitle02.png);
}

/********************************************************************************
	タブレット用 CSS
********************************************************************************/

@media screen and (min-width:769px) and ( max-width:1280px) {
	section#introduce article h1 {
		height: 1.4rem;
		font-size: 1.4rem;
	}
	section#lesson > h1 {
		height: 1.4rem;
		font-size: 1.4rem;
	}
	section#introduce .box_sentence {
		font-size: 1.2rem;
	}
}

/********************************************************************************
	スマートフォン用 CSS
********************************************************************************/

@media(max-width:768px){
	section#introduce article h1 {
		height: 1.4rem;
		font-size: 1.4rem;
	}
	section#lesson > h1 {
		height: 1.4rem;
		font-size: 1.4rem;
	}
	section#introduce div {
		margin-top: calc(40 / 920 * 100%);
	}
	section#introduce .box_sentence h3 {
		font-size: 15px;
		line-height: 1.2;
	}
	section#introduce .box_sentence {
		width: 100%;
		font-size: 1.2rem;
	}
	section#introduce .box_image {
		width: 100%;
	}
	section#lesson table {
		margin-bottom: calc(40 / 920 * 100%);
		font-size: 1rem;
	}
	section#lesson dl * {
			font-size: 1rem;
	}
}