body {
	background-image: url(../img/bgimg.jpg);
	background-repeat: no-repeat;
	background-position: center center;
	background-size: cover;
	background-attachment: fixed;
}

#PopupGrayBack {
	background-color: rgba(0, 0, 0, 0.6);
	width: 100%;
	height: 100%;
	position: fixed;
	top: 0;
	left: 0;
	display: none;
	z-index: 1021;	/* 500; */
}
#BackDropBlur {
	width: 100%;
	height: 100%;
	position: fixed;
	top: 0;
	left: 0;
	display: none;
	z-index: 1021;	/* 500; */
}


.resume{
	all: revert;
}


.container {
	background-color: rgb(255, 255, 255, .6);
}
.content-base{
	background-color: rgba(255, 255, 255, .8);
}

.pt-50{
	padding-top: 50px;
}
.pt-100{
	padding-top: 100px;
}
.placeholder{
	height: 5em;
}
.mis-1{
	margin-inline-start: 1em;
}
.mis-2{
	margin-inline-start: 2em;
}
.f-drop-shadow-246b{
	filter: drop-shadow(2px 4px 6px black);
}

.spnTitle{
	font-size: .7em;
	color: silver;
}
.spnTitle::before{
	content: "　";
}

.indent{
	text-indent: 1em;
}

.feather{
	height: 1em;
	width: 1em;
	vertical-align: text-bottom;
}

.treatise-title{
	font-weight: bolder;
	color:blue;
}


.ratio-9x16{
	aspect-ratio: 9/16;
}
.tube-title{
	color: inherit;
}
.you-tube-preview{
	border-radius: var(--bs-border-radius-lg);
}
.tube-time{
	font-size: .7em;
	background-color: #302c27;
	color: #fafafa;
	border-radius: var(--bs-border-radius);
	padding-right: .3rem;
	padding-left: .3rem;
}

.div_footer {
	background-color: #fff;
	text-align: center;
	padding: 1em 0 3em 0;
}
#svg_page_top {
    position: fixed;
    bottom: 10px;
    right: 10px;
    opacity: 0;
    z-index: 10;
}