.contents_area{
	min-height:calc(100vh - 422px);
}

.bookshelf_filter{
	padding:5px 10px;
	display:flex;
}

#search_filter{
	display:flex;
	align-items:center;
	position:relative;
	border:1px #cdcdcd solid;
	border-radius:3px;
	margin-left:10px;
}
#search_filter .material-icons{
	position:absolute;
	left:5px;
}
#ebooksearch{
	display:block;
	border:0;
	background-color:rgba(255,255,255,0);
	padding-left:2.5em;
	padding-right:4em;
	
}
#ebookfilter{
	position:absolute;
	right:5px;
	border:0;
	border-left:1px #cdcdcd solid;
	background-color:rgba(255,255,255,0);
}



#type_filter,#lang_filter{
	display:flex;
	align-items:center;
	
}

#lang_filter{
    position:relative;
	left:10px;
}
  
.ebfilter{
	cursor:pointer;
	padding:5px 7px;
	margin:0 5px;
	border:1px #cdcdcd solid;
	border-radius:3px;
}

.ebfilter:hover{
	background-color:rgba(220,188,146,0.8);
}

.ebfilter.selected{
	background-color: #946E3C;
}


.bookshelf_area{
	position:relative;
	display:flex;
	margin:15px;
	
}

.bookshelf_block{
	position:relative;
	flex:1;
	border:5px inset #6f5436 ;
	border-bottom:0;
	border-radius:6px;
	
}
.bookshelf_block::before{
	content:"";
	display:block;
	width:100%;
	height:100%;
	box-shadow:1px 1px 10px 2px rgba(0,0,0,0.5) inset;
	position:absolute;
	top:0; bottom:0;
	left:0; right:0;
}



.bookshelf_raw{
	display:flex;
	height:215px;
	background-image: url("../image/bookshelf_background.png");
	padding:0 10px;
	gap:30px 30px;
	 
}

.bookview{
	position:relative;
	height:100%;
	 
}

.bookitem{
	position:relative;
	top:16px;
	height:85%;
	cursor:pointer;
	transition: transform 0.3s;
}

.bookitem img{
	position:relative;
	display:block;
	height:100%;
	box-shadow: 10px 13px 20px 0 rgba(0, 0, 0, 0.25);
}

.bookitem:hover{
	transform: scale(1.05);
}
 
.bookintro_block{
	flex:0 0 400px;
	margin:0 10px 0 20px;
	align-self:flex-start;
	position:sticky;
	top:10px;
}
 
.bookinfo_block{
    display:flex;	
}

.book_cover{
	flex:0 0 150px;
	display:flex;
	height:200px;
	justify-content:space-around;
}

.book_cover > img{
	height:100%;
	
}
.book_detail{
	padding:0 10px;
	line-height:1.3em;
}
.book_title{
	font-weight:bold;
	font-size:2em;
	line-height:1.3em;
	margin-bottom:15px;
}
.book_meta td:nth-child(1){width:80px;}


.book_function{
	padding:20px 0;
}

#ebook_display{
	padding:10px;
	width:100%;
	font-size:1.3em;
	font-weight:bold;
}


.book_introduction{
	padding:0px 0 30px;
}

.book_introduction p{
	font-size:1.3em;
	line-height:1.5em;
	text-indent: 1em;
	
}

.book_introduction p:first-letter{
	font-size:1.4em;
	font-weight:bold;　 
	position:relative;
}