@charset "utf-8";

body {
	font-family:
		"Helvetica Neue",
		"Arial",
		"Hiragino Kaku Gothic ProN",
		"Hiragino Sans",
		"BIZ UDPGothic",
		Meiryo, 
		sans-serif;
	font-size: 14px;
	margin-bottom: 0;
}


/* アンカー */
a {
	color: #18ccb1;
}
a:hover {
	color: #ff9999;
}
a img:hover {
	opacity: 0.4;
}


/* body直下の要素 */
header, footer, body > div {
	max-width: 64rem;
	margin-left: auto;
	margin-right: auto;
}
@media screen and (min-width: 600px) {
	header, footer, body > div {
		width: 90%;
	}
}
header, body > div {
	margin-bottom: 1rem;
}


/* トップへのリンク */
header > p:first-child img {
	width: 200px;
	height: 41px;
}


/* ヘッダのメニュー */
header > nav > ul {
	margin: 0;
	text-align: center;
}
header > nav li {
	list-style: none;
	display: inline-block;
	min-width: 140px;
	text-align: center;
}
header > nav li:not(:last-child) {
	border-right: 2px solid #ddd;
}
header > nav a {
	font-weight: bolder;
	text-decoration: none;
	color: black;
}
header > nav a:hover {
	color:#e14024;
	border-bottom:3px solid #18ccb1;
}
header > nav li::before {
	content: "";
	background-size: contain;
	display: inline-block;
	width: 20px;
	height: 20px;
	vertical-align: -0.2rem;
}
#audiobook::before {
	background-image: url("../img/audiobook.png");
}
#use::before {
	background-image: url("../img/use.png");
}
#search::before {
	background-image: url("../img/search.png");
}
#link::before {
	background-image: url("../img/link.png");
}


/* --- 見出し --- */
h1 {
	background: #76ccc1;
	box-sizing: border-box;
	color: #fff;
	font-size: 18px;
	margin: 0 0 15px;
	padding: 5px 15px 5px 30px;
	position: relative;
	width: 100%;
}

h1::before {
	border-bottom: 20px solid transparent;
	border-left: 20px solid #FFF;
	border-right: 20px solid transparent;
	border-top: 20px solid transparent;
	content: " ";
	display: block;
	left: 0;
	margin: -20px 0px 0px 0px;
	position: absolute;
	top: 50%;
}

h2 {
	background: #FFF;
	border-left: 5px solid #76ccc1;
	box-sizing: border-box;
	color: #000;
	font-size: 18px;
	font-weight: bold;
	margin: 20px 0 20px;
	padding: 10px 15px 10px;
}

h3 {
	border-left: 3px solid #76ccc1;
	font-size: 16px;
	font-weight: bold;
	margin: 20px 0px 0px 0px;
	padding-left: 5px;
}





/* フッタ */
footer > nav > ul {
	background-color: #76ccc1;
	text-align: center;
	margin-bottom: 0;
	min-height: 2.5rem;
}
footer > nav li{
	list-style: none;
	display: inline-block;
	width: 15%;
	min-width: 120px;
	margin-top: 0.75rem;
	margin-bottom: 0;
	vertical-align: middle;
}
footer > nav li:not(:last-child){
	border-right:2px solid #FFF;
	text-align: center;
}
footer > nav a{
	font-size:14px;
	font-weight:bolder;
	text-decoration: none;
	color: #FFF;
}
footer > nav a:hover{
	color:#ff9999;
	border-bottom:3px solid #76ccc1;
}


.mark{
  background: linear-gradient(transparent 70%, #cdf7ee 70%);
}


.mark2{
  background: linear-gradient(transparent 0%, #cdf7ee 0%);
}

.youtube {
  width: 100%;
  aspect-ratio: 16 / 9;
}
.youtube iframe {
  width: 90%;
  height: 90%;
}