@charset "UTF-8";
html{
      	background-color:#bbb;
	font-family:"HG明朝E",游明朝,"Yu Mincho",YuMincho,"Hiragino Mincho ProN",serif;
}
body {
	margin:0;
	padding: 0;
	width:100%;
}
header{
	position:fixed
	top:0;
	left:0;
	width:100%;
	text-align: center;
	background-color:#eee;
	height:40px;
}

#戻る{
	position:fixed;
	top:4px;
	left:4px;
	padding:0 8px;
	font-size:22pt;
	z-index:3;
	color:blue;
	background-color:#fff;
	border-radius:0.5em;
	opacity:0.8;	
}
#戻る:hover{
	opacity:1;
	text-shadow:2px 0px 4px #C9C9F8;
	color:red;
}

h1{
	margin-top:0;
	margin-left:80px;
	margin-right:80px;
	color:#000;
	font-size:18px;
	word-break: keep-all;
}


iframe{
	position:fixed;
	top:40px;
	left:0;
	width:100%;
	height:calc(100vh - 60px);
}


非表示{
	color:#eee;
	text-shadow:2px 2px 2px #00000000;
	opacity:0;
}

article{
}



.三角ボタン{
	font-size:30px;
}
.三角ボタン a{
	text-decoration:none ; 
	color:blue;
	padding: 0.2em;
	display:inline;
	opacity: 0.8;
} 
.三角ボタン a:hover{
	opacity: 1;
	color:red;
	text-shadow:2px 0px 4px #C9C9F8;
}


#前の画像へ{
	position:	fixed;
	top:0;
	right: 40px;
}

#次の画像へ{
	position:	fixed;
	top:0;
	right:0;
}

#前の画像へ a:hover{
	border-radius:  1em 0.1em 0.1em 1em;
}
#次の画像へ a:hover{
	border-radius: 0.1em 1em 1em 0.1em;
}

a {
	border-radius:1em;
	color: #000; 
	border:0; 
	text-decoration:none ; 
	background-color: transparent; 
 }
a:hover {
	color: #F00; 
	 background-color:white;
	text-shadow:3px 3px 2px #C9C9F8;
}

footer{
	position:fixed;
	left:0;
	bottom:0;
	height:20px;
	width:100%;
	color:#000;
	background-color:#eee;
	text-align:center;
}