.overview {
	margin: 4px -6px;
}
.overview .column {
	float: left;
	overflow: hidden;
}
.overview .column .item,
.overview .column .spacer {
	position: relative;
	margin: 0;
	padding: 0;
	width: 100%;
	height: auto;
	overflow: hidden;
}
.overview .column .item .frame {
	position: relative;
	border-radius: 0;
	box-shadow: 0 0 6px #222;
	margin: 4px;
	padding: 0;
	background-color: #FFF;
	overflow: hidden;
	cursor: pointer;
}
.overview .column .item .frame:hover  {
	opacity: 0.8;
}
.overview .column .spacer>.frame {
	position: absolute;
	border-radius: 5px;
	box-shadow: 0 2px 6px #AAA;
	top: 8px; right: 10px; bottom: 8px; left: 8px;
	background-color: rgba(184, 198, 210, 1);
	opacity: 0;
	z-index: 10;
}
.overview .column .item .frame header {
	position: absolute;
	top: 0; right: 0; left: 0;
	height: 20px;
	z-index: 10;
}
.overview .column .item .frame header .book {
	display: none;
	float: right;
	top: 3px; right: 3px;
	width: 20px;
	height: 20px;
	background-size: contain;
	z-index: 10;	
	background-image: url(../../../../../file/image/book.png);
	background-size: 20px;
}
.overview .column .item .frame header .book[book] {
	display: inline-block;
	background-position: 0 20px;		
}
.overview .column .item .frame header .book:hover {
}
.overview .column .item .thumb {
	position: relative;
	margin-bottom: 0;
	height: auto;
}
.overview .column .item .thumb img {
	width: 100%;
}
.overview .column .item .thumb:empty {
	display: none;
}
.overview .column .item .title,
.overview .column .item .headline,
.overview .column .item .code,
.overview .column .item .image,
.overview .column .item .file,
.overview .column .item .id,
.overview .column .item .date,
.overview .column .item .memo {
	position: relative;
	padding: 5px 7px;
	height: auto;
}
.overview .column .item .title {
	font-size: 1.1em;	
}
.overview .column .item .headline {
	font-size: 1em;	
}
.overview .column .item .title,
.overview .column .item .headline,
.overview .column .item .image {
	display: none;
}

.overview .column .item .ext {
	display: none;
	margin: 10px 0 0 0;
	padding: 0 5px;
	overflow: hidden;
}
.overview .column .item .ext:empty {
	display: none;
}
.overview .column .item .ext .link,
.overview .column .item .ext .file {
	line-height: 20px;
}
.overview .column .item .link + .headline,
.overview .column .item .file + .headline {
	margin-right: 23px;
}
.overview .column .item .link:after {
	content: '';
	display: inline-block;
	margin-left: 2px;
	width: 20px;
	height: 20px;
	background-size: contain;
	background-image: url(../../../../../file/image/link.png);
	vertical-align: middle;
}
.overview .column .item .file:after {
	content: '';
	display: inline-block;
	margin-left: 2px;
	width: 20px;
	height: 20px;
	background-size: contain;
	background-image: url(../../../../../file/image/file.png);
	vertical-align: middle;
}
.overview .column .item .id {
	font-size: 0.8em;
	text-align: right;
}
.overview .column .item .date {
	display: none;
	font-size: 0.8em;
	text-align: right;
}
.overview .column .item .memo {
	margin-bottom: 2px;
	max-height: 30px;
	font-size: 0.8em;
	line-height: 1.8em;
	text-align: justify;
	overflow: hidden;
}
.overview .column .item .memo:empty {
	display: none;
}

.overview .column .item.pop .ext,
.overview .column .item.pop .memo {
	display: inline-block;
}

.overview .column .item .company {
	position: absolute;
	display: none;
	right: 0; bottom: 0; left: 0;
	padding: 2px 7px;
	font-size: 0.8em;
	text-align: right;
}